[lts8.8-rt] selftests/bpf: Fix pyperf180 compilation failure with clang18 #25
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jira LE-2125 commit-author Yonghong Song <[email protected]> commit 100888f With latest clang18 (main branch of llvm-project repo), when building bpf selftests, [~/work/bpf-next (master)]$ make -C tools/testing/selftests/bpf LLVM=1 -j The following compilation error happens: fatal error: error in backend: Branch target out of insn range ... Stack dump: 0. Program arguments: clang -g -Wall -Werror -D__TARGET_ARCH_x86 -mlittle-endian -I/home/yhs/work/bpf-next/tools/testing/selftests/bpf/tools/include -I/home/yhs/work/bpf-next/tools/testing/selftests/bpf -I/home/yhs/work/bpf-next/tools/include/uapi -I/home/yhs/work/bpf-next/tools/testing/selftests/usr/include -idirafter /home/yhs/work/llvm-project/llvm/build.18/install/lib/clang/18/include -idirafter /usr/local/include -idirafter /usr/include -Wno-compare-distinct-pointer-types -DENABLE_ATOMICS_TESTS -O2 --target=bpf -c progs/pyperf180.c -mcpu=v3 -o /home/yhs/work/bpf-next/tools/testing/selftests/bpf/pyperf180.bpf.o 1. <eof> parser at end of file 2. Code generation ... The compilation failure only happens to cpu=v2 and cpu=v3. cpu=v4 is okay since cpu=v4 supports 32-bit branch target offset. The above failure is due to upstream llvm patch [1] where some inlining behavior are changed in clang18. To workaround the issue, previously all 180 loop iterations are fully unrolled. The bpf macro __BPF_CPU_VERSION__ (implemented in clang18 recently) is used to avoid unrolling changes if cpu=v4. If __BPF_CPU_VERSION__ is not available and the compiler is clang18, the unrollng amount is unconditionally reduced. [1] llvm/llvm-project@1a2e77c Signed-off-by: Yonghong Song <[email protected]> Signed-off-by: Andrii Nakryiko <[email protected]> Tested-by: Alan Maguire <[email protected]> Link: https://lore.kernel.org/bpf/[email protected] (cherry picked from commit 100888f) Signed-off-by: Brett Mastbergen <[email protected]>
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JIRA: https://issues.redhat.com/browse/RHEL-79409 commit b1480ed Author: Will Deacon <[email protected]> Date: Wed May 22 00:38:13 2024 +0300 arm64: patching: fix handling of execmem addresses Klara Modin reported warnings for a kernel configured with BPF_JIT but without MODULES: [ 44.131296] Trying to vfree() bad address (000000004a17c299) [ 44.138024] WARNING: CPU: 1 PID: 193 at mm/vmalloc.c:3189 remove_vm_area (mm/vmalloc.c:3189 (discriminator 1)) [ 44.146675] CPU: 1 PID: 193 Comm: kworker/1:2 Tainted: G D W 6.9.0-01786-g2c9e5d4a0082 ctrliq#25 [ 44.158229] Hardware name: Raspberry Pi 3 Model B (DT) [ 44.164433] Workqueue: events bpf_prog_free_deferred [ 44.170492] pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--) [ 44.178601] pc : remove_vm_area (mm/vmalloc.c:3189 (discriminator 1)) [ 44.183705] lr : remove_vm_area (mm/vmalloc.c:3189 (discriminator 1)) [ 44.188772] sp : ffff800082a13c70 [ 44.193112] x29: ffff800082a13c70 x28: 0000000000000000 x27: 0000000000000000 [ 44.201384] x26: 0000000000000000 x25: ffff00003a44efa0 x24: 00000000d4202000 [ 44.209658] x23: ffff800081223dd0 x22: ffff00003a198a40 x21: ffff8000814dd880 [ 44.217924] x20: 00000000d4202000 x19: ffff8000814dd880 x18: 0000000000000006 [ 44.226206] x17: 0000000000000000 x16: 0000000000000020 x15: 0000000000000002 [ 44.234460] x14: ffff8000811a6370 x13: 0000000020000000 x12: 0000000000000000 [ 44.242710] x11: ffff8000811a6370 x10: 0000000000000144 x9 : ffff8000811fe370 [ 44.250959] x8 : 0000000000017fe8 x7 : 00000000fffff000 x6 : ffff8000811fe370 [ 44.259206] x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000000 [ 44.267457] x2 : 0000000000000000 x1 : 0000000000000000 x0 : ffff000002203240 [ 44.275703] Call trace: [ 44.279158] remove_vm_area (mm/vmalloc.c:3189 (discriminator 1)) [ 44.283858] vfree (mm/vmalloc.c:3322) [ 44.287835] execmem_free (mm/execmem.c:70) [ 44.292347] bpf_jit_free_exec+0x10/0x1c [ 44.297283] bpf_prog_pack_free (kernel/bpf/core.c:1006) [ 44.302457] bpf_jit_binary_pack_free (kernel/bpf/core.c:1195) [ 44.307951] bpf_jit_free (include/linux/filter.h:1083 arch/arm64/net/bpf_jit_comp.c:2474) [ 44.312342] bpf_prog_free_deferred (kernel/bpf/core.c:2785) [ 44.317785] process_one_work (kernel/workqueue.c:3273) [ 44.322684] worker_thread (kernel/workqueue.c:3342 (discriminator 2) kernel/workqueue.c:3429 (discriminator 2)) [ 44.327292] kthread (kernel/kthread.c:388) [ 44.331342] ret_from_fork (arch/arm64/kernel/entry.S:861) The problem is because bpf_arch_text_copy() silently fails to write to the read-only area as a result of patch_map() faulting and the resulting -EFAULT being chucked away. Update patch_map() to use CONFIG_EXECMEM instead of CONFIG_STRICT_MODULE_RWX to check for vmalloc addresses. Link: https://lkml.kernel.org/r/[email protected] Fixes: 2c9e5d4 ("bpf: remove CONFIG_BPF_JIT dependency on CONFIG_MODULES of") Signed-off-by: Will Deacon <[email protected]> Signed-off-by: Mike Rapoport (IBM) <[email protected]> Reported-by: Klara Modin <[email protected]> Closes: https://lore.kernel.org/all/[email protected] Tested-by: Klara Modin <[email protected]> Cc: Björn Töpel <[email protected]> Cc: Luis Chamberlain <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Ming Lei <[email protected]>
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ACPICA commit 1c28da2242783579d59767617121035dafba18c3 This was originally done in NetBSD: NetBSD/src@b69d1ac and is the correct alternative to the smattering of `memcpy`s I previously contributed to this repository. This also sidesteps the newly strict checks added in UBSAN: llvm/llvm-project@7926744 Before this change we see the following UBSAN stack trace in Fuchsia: #0 0x000021afcfdeca5e in acpi_rs_get_address_common(struct acpi_resource*, union aml_resource*) ../../third_party/acpica/source/components/resources/rsaddr.c:329 <platform-bus-x86.so>+0x6aca5e #1.2 0x000021982bc4af3c in ubsan_get_stack_trace() compiler-rt/lib/ubsan/ubsan_diag.cpp:41 <libclang_rt.asan.so>+0x41f3c #1.1 0x000021982bc4af3c in maybe_print_stack_trace() compiler-rt/lib/ubsan/ubsan_diag.cpp:51 <libclang_rt.asan.so>+0x41f3c #1 0x000021982bc4af3c in ~scoped_report() compiler-rt/lib/ubsan/ubsan_diag.cpp:395 <libclang_rt.asan.so>+0x41f3c #2 0x000021982bc4bb6f in handletype_mismatch_impl() compiler-rt/lib/ubsan/ubsan_handlers.cpp:137 <libclang_rt.asan.so>+0x42b6f #3 0x000021982bc4b723 in __ubsan_handle_type_mismatch_v1 compiler-rt/lib/ubsan/ubsan_handlers.cpp:142 <libclang_rt.asan.so>+0x42723 #4 0x000021afcfdeca5e in acpi_rs_get_address_common(struct acpi_resource*, union aml_resource*) ../../third_party/acpica/source/components/resources/rsaddr.c:329 <platform-bus-x86.so>+0x6aca5e #5 0x000021afcfdf2089 in acpi_rs_convert_aml_to_resource(struct acpi_resource*, union aml_resource*, struct acpi_rsconvert_info*) ../../third_party/acpica/source/components/resources/rsmisc.c:355 <platform-bus-x86.so>+0x6b2089 #6 0x000021afcfded169 in acpi_rs_convert_aml_to_resources(u8*, u32, u32, u8, void**) ../../third_party/acpica/source/components/resources/rslist.c:137 <platform-bus-x86.so>+0x6ad169 #7 0x000021afcfe2d24a in acpi_ut_walk_aml_resources(struct acpi_walk_state*, u8*, acpi_size, acpi_walk_aml_callback, void**) ../../third_party/acpica/source/components/utilities/utresrc.c:237 <platform-bus-x86.so>+0x6ed24a #8 0x000021afcfde66b7 in acpi_rs_create_resource_list(union acpi_operand_object*, struct acpi_buffer*) ../../third_party/acpica/source/components/resources/rscreate.c:199 <platform-bus-x86.so>+0x6a66b7 #9 0x000021afcfdf6979 in acpi_rs_get_method_data(acpi_handle, const char*, struct acpi_buffer*) ../../third_party/acpica/source/components/resources/rsutils.c:770 <platform-bus-x86.so>+0x6b6979 #10 0x000021afcfdf708f in acpi_walk_resources(acpi_handle, char*, acpi_walk_resource_callback, void*) ../../third_party/acpica/source/components/resources/rsxface.c:731 <platform-bus-x86.so>+0x6b708f #11 0x000021afcfa95dcf in acpi::acpi_impl::walk_resources(acpi::acpi_impl*, acpi_handle, const char*, acpi::Acpi::resources_callable) ../../src/devices/board/lib/acpi/acpi-impl.cc:41 <platform-bus-x86.so>+0x355dcf #12 0x000021afcfaa8278 in acpi::device_builder::gather_resources(acpi::device_builder*, acpi::Acpi*, fidl::any_arena&, acpi::Manager*, acpi::device_builder::gather_resources_callback) ../../src/devices/board/lib/acpi/device-builder.cc:84 <platform-bus-x86.so>+0x368278 #13 0x000021afcfbddb87 in acpi::Manager::configure_discovered_devices(acpi::Manager*) ../../src/devices/board/lib/acpi/manager.cc:75 <platform-bus-x86.so>+0x49db87 #14 0x000021afcf99091d in publish_acpi_devices(acpi::Manager*, zx_device_t*, zx_device_t*) ../../src/devices/board/drivers/x86/acpi-nswalk.cc:95 <platform-bus-x86.so>+0x25091d #15 0x000021afcf9c1d4e in x86::X86::do_init(x86::X86*) ../../src/devices/board/drivers/x86/x86.cc:60 <platform-bus-x86.so>+0x281d4e #16 0x000021afcf9e33ad in λ(x86::X86::ddk_init::(anon class)*) ../../src/devices/board/drivers/x86/x86.cc:77 <platform-bus-x86.so>+0x2a33ad #17 0x000021afcf9e313e in fit::internal::target<(lambda at../../src/devices/board/drivers/x86/x86.cc:76:19), false, false, std::__2::allocator<std::byte>, void>::invoke(void*) ../../sdk/lib/fit/include/lib/fit/internal/function.h:183 <platform-bus-x86.so>+0x2a313e #18 0x000021afcfbab4c7 in fit::internal::function_base<16UL, false, void(), std::__2::allocator<std::byte>>::invoke(const fit::internal::function_base<16UL, false, void (), std::__2::allocator<std::byte> >*) ../../sdk/lib/fit/include/lib/fit/internal/function.h:522 <platform-bus-x86.so>+0x46b4c7 #19 0x000021afcfbab342 in fit::function_impl<16UL, false, void(), std::__2::allocator<std::byte>>::operator()(const fit::function_impl<16UL, false, void (), std::__2::allocator<std::byte> >*) ../../sdk/lib/fit/include/lib/fit/function.h:315 <platform-bus-x86.so>+0x46b342 #20 0x000021afcfcd98c3 in async::internal::retained_task::Handler(async_dispatcher_t*, async_task_t*, zx_status_t) ../../sdk/lib/async/task.cc:24 <platform-bus-x86.so>+0x5998c3 #21 0x00002290f9924616 in λ(const driver_runtime::Dispatcher::post_task::(anon class)*, std::__2::unique_ptr<driver_runtime::callback_request, std::__2::default_delete<driver_runtime::callback_request> >, zx_status_t) ../../src/devices/bin/driver_runtime/dispatcher.cc:789 <libdriver_runtime.so>+0x10a616 #22 0x00002290f9924323 in fit::internal::target<(lambda at../../src/devices/bin/driver_runtime/dispatcher.cc:788:7), true, false, std::__2::allocator<std::byte>, void, std::__2::unique_ptr<driver_runtime::callback_request, std::__2::default_delete<driver_runtime::callback_request>>, int>::invoke(void*, std::__2::unique_ptr<driver_runtime::callback_request, std::__2::default_delete<driver_runtime::callback_request> >, int) ../../sdk/lib/fit/include/lib/fit/internal/function.h:128 <libdriver_runtime.so>+0x10a323 #23 0x00002290f9904b76 in fit::internal::function_base<24UL, true, void(std::__2::unique_ptr<driver_runtime::callback_request, std::__2::default_delete<driver_runtime::callback_request>>, int), std::__2::allocator<std::byte>>::invoke(const fit::internal::function_base<24UL, true, void (std::__2::unique_ptr<driver_runtime::callback_request, std::__2::default_delete<driver_runtime::callback_request> >, int), std::__2::allocator<std::byte> >*, std::__2::unique_ptr<driver_runtime::callback_request, std::__2::default_delete<driver_runtime::callback_request> >, int) ../../sdk/lib/fit/include/lib/fit/internal/function.h:522 <libdriver_runtime.so>+0xeab76 #24 0x00002290f9904831 in fit::callback_impl<24UL, true, void(std::__2::unique_ptr<driver_runtime::callback_request, std::__2::default_delete<driver_runtime::callback_request>>, int), std::__2::allocator<std::byte>>::operator()(fit::callback_impl<24UL, true, void (std::__2::unique_ptr<driver_runtime::callback_request, std::__2::default_delete<driver_runtime::callback_request> >, int), std::__2::allocator<std::byte> >*, std::__2::unique_ptr<driver_runtime::callback_request, std::__2::default_delete<driver_runtime::callback_request> >, int) ../../sdk/lib/fit/include/lib/fit/function.h:471 <libdriver_runtime.so>+0xea831 #25 0x00002290f98d5adc in driver_runtime::callback_request::Call(driver_runtime::callback_request*, std::__2::unique_ptr<driver_runtime::callback_request, std::__2::default_delete<driver_runtime::callback_request> >, zx_status_t) ../../src/devices/bin/driver_runtime/callback_request.h:74 <libdriver_runtime.so>+0xbbadc #26 0x00002290f98e1e58 in driver_runtime::Dispatcher::dispatch_callback(driver_runtime::Dispatcher*, std::__2::unique_ptr<driver_runtime::callback_request, std::__2::default_delete<driver_runtime::callback_request> >) ../../src/devices/bin/driver_runtime/dispatcher.cc:1248 <libdriver_runtime.so>+0xc7e58 #27 0x00002290f98e4159 in driver_runtime::Dispatcher::dispatch_callbacks(driver_runtime::Dispatcher*, std::__2::unique_ptr<driver_runtime::Dispatcher::event_waiter, std::__2::default_delete<driver_runtime::Dispatcher::event_waiter> >, fbl::ref_ptr<driver_runtime::Dispatcher>) ../../src/devices/bin/driver_runtime/dispatcher.cc:1308 <libdriver_runtime.so>+0xca159 #28 0x00002290f9918414 in λ(const driver_runtime::Dispatcher::create_with_adder::(anon class)*, std::__2::unique_ptr<driver_runtime::Dispatcher::event_waiter, std::__2::default_delete<driver_runtime::Dispatcher::event_waiter> >, fbl::ref_ptr<driver_runtime::Dispatcher>) ../../src/devices/bin/driver_runtime/dispatcher.cc:353 <libdriver_runtime.so>+0xfe414 #29 0x00002290f991812d in fit::internal::target<(lambda at../../src/devices/bin/driver_runtime/dispatcher.cc:351:7), true, false, std::__2::allocator<std::byte>, void, std::__2::unique_ptr<driver_runtime::Dispatcher::event_waiter, std::__2::default_delete<driver_runtime::Dispatcher::event_waiter>>, fbl::ref_ptr<driver_runtime::Dispatcher>>::invoke(void*, std::__2::unique_ptr<driver_runtime::Dispatcher::event_waiter, std::__2::default_delete<driver_runtime::Dispatcher::event_waiter> >, fbl::ref_ptr<driver_runtime::Dispatcher>) ../../sdk/lib/fit/include/lib/fit/internal/function.h:128 <libdriver_runtime.so>+0xfe12d #30 0x00002290f9906fc7 in fit::internal::function_base<8UL, true, void(std::__2::unique_ptr<driver_runtime::Dispatcher::event_waiter, std::__2::default_delete<driver_runtime::Dispatcher::event_waiter>>, fbl::ref_ptr<driver_runtime::Dispatcher>), std::__2::allocator<std::byte>>::invoke(const fit::internal::function_base<8UL, true, void (std::__2::unique_ptr<driver_runtime::Dispatcher::event_waiter, std::__2::default_delete<driver_runtime::Dispatcher::event_waiter> >, fbl::ref_ptr<driver_runtime::Dispatcher>), std::__2::allocator<std::byte> >*, std::__2::unique_ptr<driver_runtime::Dispatcher::event_waiter, std::__2::default_delete<driver_runtime::Dispatcher::event_waiter> >, fbl::ref_ptr<driver_runtime::Dispatcher>) ../../sdk/lib/fit/include/lib/fit/internal/function.h:522 <libdriver_runtime.so>+0xecfc7 #31 0x00002290f9906c66 in fit::function_impl<8UL, true, void(std::__2::unique_ptr<driver_runtime::Dispatcher::event_waiter, std::__2::default_delete<driver_runtime::Dispatcher::event_waiter>>, fbl::ref_ptr<driver_runtime::Dispatcher>), std::__2::allocator<std::byte>>::operator()(const fit::function_impl<8UL, true, void (std::__2::unique_ptr<driver_runtime::Dispatcher::event_waiter, std::__2::default_delete<driver_runtime::Dispatcher::event_waiter> >, fbl::ref_ptr<driver_runtime::Dispatcher>), std::__2::allocator<std::byte> >*, std::__2::unique_ptr<driver_runtime::Dispatcher::event_waiter, std::__2::default_delete<driver_runtime::Dispatcher::event_waiter> >, fbl::ref_ptr<driver_runtime::Dispatcher>) ../../sdk/lib/fit/include/lib/fit/function.h:315 <libdriver_runtime.so>+0xecc66 #32 0x00002290f98e73d9 in driver_runtime::Dispatcher::event_waiter::invoke_callback(driver_runtime::Dispatcher::event_waiter*, std::__2::unique_ptr<driver_runtime::Dispatcher::event_waiter, std::__2::default_delete<driver_runtime::Dispatcher::event_waiter> >, fbl::ref_ptr<driver_runtime::Dispatcher>) ../../src/devices/bin/driver_runtime/dispatcher.h:543 <libdriver_runtime.so>+0xcd3d9 #33 0x00002290f98e700d in driver_runtime::Dispatcher::event_waiter::handle_event(std::__2::unique_ptr<driver_runtime::Dispatcher::event_waiter, std::__2::default_delete<driver_runtime::Dispatcher::event_waiter> >, async_dispatcher_t*, async::wait_base*, zx_status_t, zx_packet_signal_t const*) ../../src/devices/bin/driver_runtime/dispatcher.cc:1442 <libdriver_runtime.so>+0xcd00d #34 0x00002290f9918983 in async_loop_owned_event_handler<driver_runtime::Dispatcher::event_waiter>::handle_event(async_loop_owned_event_handler<driver_runtime::Dispatcher::event_waiter>*, async_dispatcher_t*, async::wait_base*, zx_status_t, zx_packet_signal_t const*) ../../src/devices/bin/driver_runtime/async_loop_owned_event_handler.h:59 <libdriver_runtime.so>+0xfe983 #35 0x00002290f9918b9e in async::wait_method<async_loop_owned_event_handler<driver_runtime::Dispatcher::event_waiter>, &async_loop_owned_event_handler<driver_runtime::Dispatcher::event_waiter>::handle_event>::call_handler(async_dispatcher_t*, async_wait_t*, zx_status_t, zx_packet_signal_t const*) ../../sdk/lib/async/include/lib/async/cpp/wait.h:201 <libdriver_runtime.so>+0xfeb9e #36 0x00002290f99bf509 in async_loop_dispatch_wait(async_loop_t*, async_wait_t*, zx_status_t, zx_packet_signal_t const*) ../../sdk/lib/async-loop/loop.c:394 <libdriver_runtime.so>+0x1a5509 #37 0x00002290f99b9958 in async_loop_run_once(async_loop_t*, zx_time_t) ../../sdk/lib/async-loop/loop.c:343 <libdriver_runtime.so>+0x19f958 #38 0x00002290f99b9247 in async_loop_run(async_loop_t*, zx_time_t, _Bool) ../../sdk/lib/async-loop/loop.c:301 <libdriver_runtime.so>+0x19f247 #39 0x00002290f99ba962 in async_loop_run_thread(void*) ../../sdk/lib/async-loop/loop.c:860 <libdriver_runtime.so>+0x1a0962 #40 0x000041afd176ef30 in start_c11(void*) ../../zircon/third_party/ulib/musl/pthread/pthread_create.c:63 <libc.so>+0x84f30 #41 0x000041afd18a448d in thread_trampoline(uintptr_t, uintptr_t) ../../zircon/system/ulib/runtime/thread.cc:100 <libc.so>+0x1ba48d Link: acpica/acpica@1c28da22 Signed-off-by: Rafael J. Wysocki <[email protected]> Link: https://patch.msgid.link/[email protected] Signed-off-by: Tamir Duberstein <[email protected]> [ rjw: Pick up the tag from Tamir ] Signed-off-by: Rafael J. Wysocki <[email protected]>
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[ Upstream commit eedf3e3 ] ACPICA commit 1c28da2242783579d59767617121035dafba18c3 This was originally done in NetBSD: NetBSD/src@b69d1ac and is the correct alternative to the smattering of `memcpy`s I previously contributed to this repository. This also sidesteps the newly strict checks added in UBSAN: llvm/llvm-project@7926744 Before this change we see the following UBSAN stack trace in Fuchsia: #0 0x000021afcfdeca5e in acpi_rs_get_address_common(struct acpi_resource*, union aml_resource*) ../../third_party/acpica/source/components/resources/rsaddr.c:329 <platform-bus-x86.so>+0x6aca5e #1.2 0x000021982bc4af3c in ubsan_get_stack_trace() compiler-rt/lib/ubsan/ubsan_diag.cpp:41 <libclang_rt.asan.so>+0x41f3c #1.1 0x000021982bc4af3c in maybe_print_stack_trace() compiler-rt/lib/ubsan/ubsan_diag.cpp:51 <libclang_rt.asan.so>+0x41f3c #1 0x000021982bc4af3c in ~scoped_report() compiler-rt/lib/ubsan/ubsan_diag.cpp:395 <libclang_rt.asan.so>+0x41f3c #2 0x000021982bc4bb6f in handletype_mismatch_impl() compiler-rt/lib/ubsan/ubsan_handlers.cpp:137 <libclang_rt.asan.so>+0x42b6f #3 0x000021982bc4b723 in __ubsan_handle_type_mismatch_v1 compiler-rt/lib/ubsan/ubsan_handlers.cpp:142 <libclang_rt.asan.so>+0x42723 #4 0x000021afcfdeca5e in acpi_rs_get_address_common(struct acpi_resource*, union aml_resource*) ../../third_party/acpica/source/components/resources/rsaddr.c:329 <platform-bus-x86.so>+0x6aca5e #5 0x000021afcfdf2089 in acpi_rs_convert_aml_to_resource(struct acpi_resource*, union aml_resource*, struct acpi_rsconvert_info*) ../../third_party/acpica/source/components/resources/rsmisc.c:355 <platform-bus-x86.so>+0x6b2089 #6 0x000021afcfded169 in acpi_rs_convert_aml_to_resources(u8*, u32, u32, u8, void**) ../../third_party/acpica/source/components/resources/rslist.c:137 <platform-bus-x86.so>+0x6ad169 #7 0x000021afcfe2d24a in acpi_ut_walk_aml_resources(struct acpi_walk_state*, u8*, acpi_size, acpi_walk_aml_callback, void**) ../../third_party/acpica/source/components/utilities/utresrc.c:237 <platform-bus-x86.so>+0x6ed24a #8 0x000021afcfde66b7 in acpi_rs_create_resource_list(union acpi_operand_object*, struct acpi_buffer*) ../../third_party/acpica/source/components/resources/rscreate.c:199 <platform-bus-x86.so>+0x6a66b7 #9 0x000021afcfdf6979 in acpi_rs_get_method_data(acpi_handle, const char*, struct acpi_buffer*) ../../third_party/acpica/source/components/resources/rsutils.c:770 <platform-bus-x86.so>+0x6b6979 #10 0x000021afcfdf708f in acpi_walk_resources(acpi_handle, char*, acpi_walk_resource_callback, void*) ../../third_party/acpica/source/components/resources/rsxface.c:731 <platform-bus-x86.so>+0x6b708f #11 0x000021afcfa95dcf in acpi::acpi_impl::walk_resources(acpi::acpi_impl*, acpi_handle, const char*, acpi::Acpi::resources_callable) ../../src/devices/board/lib/acpi/acpi-impl.cc:41 <platform-bus-x86.so>+0x355dcf #12 0x000021afcfaa8278 in acpi::device_builder::gather_resources(acpi::device_builder*, acpi::Acpi*, fidl::any_arena&, acpi::Manager*, acpi::device_builder::gather_resources_callback) ../../src/devices/board/lib/acpi/device-builder.cc:84 <platform-bus-x86.so>+0x368278 #13 0x000021afcfbddb87 in acpi::Manager::configure_discovered_devices(acpi::Manager*) ../../src/devices/board/lib/acpi/manager.cc:75 <platform-bus-x86.so>+0x49db87 #14 0x000021afcf99091d in publish_acpi_devices(acpi::Manager*, zx_device_t*, zx_device_t*) ../../src/devices/board/drivers/x86/acpi-nswalk.cc:95 <platform-bus-x86.so>+0x25091d #15 0x000021afcf9c1d4e in x86::X86::do_init(x86::X86*) ../../src/devices/board/drivers/x86/x86.cc:60 <platform-bus-x86.so>+0x281d4e #16 0x000021afcf9e33ad in λ(x86::X86::ddk_init::(anon class)*) ../../src/devices/board/drivers/x86/x86.cc:77 <platform-bus-x86.so>+0x2a33ad #17 0x000021afcf9e313e in fit::internal::target<(lambda at../../src/devices/board/drivers/x86/x86.cc:76:19), false, false, std::__2::allocator<std::byte>, void>::invoke(void*) ../../sdk/lib/fit/include/lib/fit/internal/function.h:183 <platform-bus-x86.so>+0x2a313e #18 0x000021afcfbab4c7 in fit::internal::function_base<16UL, false, void(), std::__2::allocator<std::byte>>::invoke(const fit::internal::function_base<16UL, false, void (), std::__2::allocator<std::byte> >*) ../../sdk/lib/fit/include/lib/fit/internal/function.h:522 <platform-bus-x86.so>+0x46b4c7 #19 0x000021afcfbab342 in fit::function_impl<16UL, false, void(), std::__2::allocator<std::byte>>::operator()(const fit::function_impl<16UL, false, void (), std::__2::allocator<std::byte> >*) ../../sdk/lib/fit/include/lib/fit/function.h:315 <platform-bus-x86.so>+0x46b342 #20 0x000021afcfcd98c3 in async::internal::retained_task::Handler(async_dispatcher_t*, async_task_t*, zx_status_t) ../../sdk/lib/async/task.cc:24 <platform-bus-x86.so>+0x5998c3 #21 0x00002290f9924616 in λ(const driver_runtime::Dispatcher::post_task::(anon class)*, std::__2::unique_ptr<driver_runtime::callback_request, std::__2::default_delete<driver_runtime::callback_request> >, zx_status_t) ../../src/devices/bin/driver_runtime/dispatcher.cc:789 <libdriver_runtime.so>+0x10a616 #22 0x00002290f9924323 in fit::internal::target<(lambda at../../src/devices/bin/driver_runtime/dispatcher.cc:788:7), true, false, std::__2::allocator<std::byte>, void, std::__2::unique_ptr<driver_runtime::callback_request, std::__2::default_delete<driver_runtime::callback_request>>, int>::invoke(void*, std::__2::unique_ptr<driver_runtime::callback_request, std::__2::default_delete<driver_runtime::callback_request> >, int) ../../sdk/lib/fit/include/lib/fit/internal/function.h:128 <libdriver_runtime.so>+0x10a323 #23 0x00002290f9904b76 in fit::internal::function_base<24UL, true, void(std::__2::unique_ptr<driver_runtime::callback_request, std::__2::default_delete<driver_runtime::callback_request>>, int), std::__2::allocator<std::byte>>::invoke(const fit::internal::function_base<24UL, true, void (std::__2::unique_ptr<driver_runtime::callback_request, std::__2::default_delete<driver_runtime::callback_request> >, int), std::__2::allocator<std::byte> >*, std::__2::unique_ptr<driver_runtime::callback_request, std::__2::default_delete<driver_runtime::callback_request> >, int) ../../sdk/lib/fit/include/lib/fit/internal/function.h:522 <libdriver_runtime.so>+0xeab76 #24 0x00002290f9904831 in fit::callback_impl<24UL, true, void(std::__2::unique_ptr<driver_runtime::callback_request, std::__2::default_delete<driver_runtime::callback_request>>, int), std::__2::allocator<std::byte>>::operator()(fit::callback_impl<24UL, true, void (std::__2::unique_ptr<driver_runtime::callback_request, std::__2::default_delete<driver_runtime::callback_request> >, int), std::__2::allocator<std::byte> >*, std::__2::unique_ptr<driver_runtime::callback_request, std::__2::default_delete<driver_runtime::callback_request> >, int) ../../sdk/lib/fit/include/lib/fit/function.h:471 <libdriver_runtime.so>+0xea831 #25 0x00002290f98d5adc in driver_runtime::callback_request::Call(driver_runtime::callback_request*, std::__2::unique_ptr<driver_runtime::callback_request, std::__2::default_delete<driver_runtime::callback_request> >, zx_status_t) ../../src/devices/bin/driver_runtime/callback_request.h:74 <libdriver_runtime.so>+0xbbadc #26 0x00002290f98e1e58 in driver_runtime::Dispatcher::dispatch_callback(driver_runtime::Dispatcher*, std::__2::unique_ptr<driver_runtime::callback_request, std::__2::default_delete<driver_runtime::callback_request> >) ../../src/devices/bin/driver_runtime/dispatcher.cc:1248 <libdriver_runtime.so>+0xc7e58 #27 0x00002290f98e4159 in driver_runtime::Dispatcher::dispatch_callbacks(driver_runtime::Dispatcher*, std::__2::unique_ptr<driver_runtime::Dispatcher::event_waiter, std::__2::default_delete<driver_runtime::Dispatcher::event_waiter> >, fbl::ref_ptr<driver_runtime::Dispatcher>) ../../src/devices/bin/driver_runtime/dispatcher.cc:1308 <libdriver_runtime.so>+0xca159 #28 0x00002290f9918414 in λ(const driver_runtime::Dispatcher::create_with_adder::(anon class)*, std::__2::unique_ptr<driver_runtime::Dispatcher::event_waiter, std::__2::default_delete<driver_runtime::Dispatcher::event_waiter> >, fbl::ref_ptr<driver_runtime::Dispatcher>) ../../src/devices/bin/driver_runtime/dispatcher.cc:353 <libdriver_runtime.so>+0xfe414 #29 0x00002290f991812d in fit::internal::target<(lambda at../../src/devices/bin/driver_runtime/dispatcher.cc:351:7), true, false, std::__2::allocator<std::byte>, void, std::__2::unique_ptr<driver_runtime::Dispatcher::event_waiter, std::__2::default_delete<driver_runtime::Dispatcher::event_waiter>>, fbl::ref_ptr<driver_runtime::Dispatcher>>::invoke(void*, std::__2::unique_ptr<driver_runtime::Dispatcher::event_waiter, std::__2::default_delete<driver_runtime::Dispatcher::event_waiter> >, fbl::ref_ptr<driver_runtime::Dispatcher>) ../../sdk/lib/fit/include/lib/fit/internal/function.h:128 <libdriver_runtime.so>+0xfe12d #30 0x00002290f9906fc7 in fit::internal::function_base<8UL, true, void(std::__2::unique_ptr<driver_runtime::Dispatcher::event_waiter, std::__2::default_delete<driver_runtime::Dispatcher::event_waiter>>, fbl::ref_ptr<driver_runtime::Dispatcher>), std::__2::allocator<std::byte>>::invoke(const fit::internal::function_base<8UL, true, void (std::__2::unique_ptr<driver_runtime::Dispatcher::event_waiter, std::__2::default_delete<driver_runtime::Dispatcher::event_waiter> >, fbl::ref_ptr<driver_runtime::Dispatcher>), std::__2::allocator<std::byte> >*, std::__2::unique_ptr<driver_runtime::Dispatcher::event_waiter, std::__2::default_delete<driver_runtime::Dispatcher::event_waiter> >, fbl::ref_ptr<driver_runtime::Dispatcher>) ../../sdk/lib/fit/include/lib/fit/internal/function.h:522 <libdriver_runtime.so>+0xecfc7 #31 0x00002290f9906c66 in fit::function_impl<8UL, true, void(std::__2::unique_ptr<driver_runtime::Dispatcher::event_waiter, std::__2::default_delete<driver_runtime::Dispatcher::event_waiter>>, fbl::ref_ptr<driver_runtime::Dispatcher>), std::__2::allocator<std::byte>>::operator()(const fit::function_impl<8UL, true, void (std::__2::unique_ptr<driver_runtime::Dispatcher::event_waiter, std::__2::default_delete<driver_runtime::Dispatcher::event_waiter> >, fbl::ref_ptr<driver_runtime::Dispatcher>), std::__2::allocator<std::byte> >*, std::__2::unique_ptr<driver_runtime::Dispatcher::event_waiter, std::__2::default_delete<driver_runtime::Dispatcher::event_waiter> >, fbl::ref_ptr<driver_runtime::Dispatcher>) ../../sdk/lib/fit/include/lib/fit/function.h:315 <libdriver_runtime.so>+0xecc66 #32 0x00002290f98e73d9 in driver_runtime::Dispatcher::event_waiter::invoke_callback(driver_runtime::Dispatcher::event_waiter*, std::__2::unique_ptr<driver_runtime::Dispatcher::event_waiter, std::__2::default_delete<driver_runtime::Dispatcher::event_waiter> >, fbl::ref_ptr<driver_runtime::Dispatcher>) ../../src/devices/bin/driver_runtime/dispatcher.h:543 <libdriver_runtime.so>+0xcd3d9 #33 0x00002290f98e700d in driver_runtime::Dispatcher::event_waiter::handle_event(std::__2::unique_ptr<driver_runtime::Dispatcher::event_waiter, std::__2::default_delete<driver_runtime::Dispatcher::event_waiter> >, async_dispatcher_t*, async::wait_base*, zx_status_t, zx_packet_signal_t const*) ../../src/devices/bin/driver_runtime/dispatcher.cc:1442 <libdriver_runtime.so>+0xcd00d #34 0x00002290f9918983 in async_loop_owned_event_handler<driver_runtime::Dispatcher::event_waiter>::handle_event(async_loop_owned_event_handler<driver_runtime::Dispatcher::event_waiter>*, async_dispatcher_t*, async::wait_base*, zx_status_t, zx_packet_signal_t const*) ../../src/devices/bin/driver_runtime/async_loop_owned_event_handler.h:59 <libdriver_runtime.so>+0xfe983 #35 0x00002290f9918b9e in async::wait_method<async_loop_owned_event_handler<driver_runtime::Dispatcher::event_waiter>, &async_loop_owned_event_handler<driver_runtime::Dispatcher::event_waiter>::handle_event>::call_handler(async_dispatcher_t*, async_wait_t*, zx_status_t, zx_packet_signal_t const*) ../../sdk/lib/async/include/lib/async/cpp/wait.h:201 <libdriver_runtime.so>+0xfeb9e #36 0x00002290f99bf509 in async_loop_dispatch_wait(async_loop_t*, async_wait_t*, zx_status_t, zx_packet_signal_t const*) ../../sdk/lib/async-loop/loop.c:394 <libdriver_runtime.so>+0x1a5509 #37 0x00002290f99b9958 in async_loop_run_once(async_loop_t*, zx_time_t) ../../sdk/lib/async-loop/loop.c:343 <libdriver_runtime.so>+0x19f958 #38 0x00002290f99b9247 in async_loop_run(async_loop_t*, zx_time_t, _Bool) ../../sdk/lib/async-loop/loop.c:301 <libdriver_runtime.so>+0x19f247 #39 0x00002290f99ba962 in async_loop_run_thread(void*) ../../sdk/lib/async-loop/loop.c:860 <libdriver_runtime.so>+0x1a0962 #40 0x000041afd176ef30 in start_c11(void*) ../../zircon/third_party/ulib/musl/pthread/pthread_create.c:63 <libc.so>+0x84f30 #41 0x000041afd18a448d in thread_trampoline(uintptr_t, uintptr_t) ../../zircon/system/ulib/runtime/thread.cc:100 <libc.so>+0x1ba48d Link: acpica/acpica@1c28da22 Signed-off-by: Rafael J. Wysocki <[email protected]> Link: https://patch.msgid.link/[email protected] Signed-off-by: Tamir Duberstein <[email protected]> [ rjw: Pick up the tag from Tamir ] Signed-off-by: Rafael J. Wysocki <[email protected]> Signed-off-by: Sasha Levin <[email protected]>
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Without the change `perf `hangs up on charaster devices. On my system
it's enough to run system-wide sampler for a few seconds to get the
hangup:
$ perf record -a -g --call-graph=dwarf
$ perf report
# hung
`strace` shows that hangup happens on reading on a character device
`/dev/dri/renderD128`
$ strace -y -f -p 2780484
strace: Process 2780484 attached
pread64(101</dev/dri/renderD128>, strace: Process 2780484 detached
It's call trace descends into `elfutils`:
$ gdb -p 2780484
(gdb) bt
#0 0x00007f5e508f04b7 in __libc_pread64 (fd=101, buf=0x7fff9df7edb0, count=0, offset=0)
at ../sysdeps/unix/sysv/linux/pread64.c:25
#1 0x00007f5e52b79515 in read_file () from /<<NIX>>/elfutils-0.192/lib/libelf.so.1
#2 0x00007f5e52b25666 in libdw_open_elf () from /<<NIX>>/elfutils-0.192/lib/libdw.so.1
#3 0x00007f5e52b25907 in __libdw_open_file () from /<<NIX>>/elfutils-0.192/lib/libdw.so.1
#4 0x00007f5e52b120a9 in dwfl_report_elf@@ELFUTILS_0.156 ()
from /<<NIX>>/elfutils-0.192/lib/libdw.so.1
#5 0x000000000068bf20 in __report_module (al=al@entry=0x7fff9df80010, ip=ip@entry=139803237033216, ui=ui@entry=0x5369b5e0)
at util/dso.h:537
#6 0x000000000068c3d1 in report_module (ip=139803237033216, ui=0x5369b5e0) at util/unwind-libdw.c:114
#7 frame_callback (state=0x535aef10, arg=0x5369b5e0) at util/unwind-libdw.c:242
#8 0x00007f5e52b261d3 in dwfl_thread_getframes () from /<<NIX>>/elfutils-0.192/lib/libdw.so.1
#9 0x00007f5e52b25bdb in get_one_thread_cb () from /<<NIX>>/elfutils-0.192/lib/libdw.so.1
#10 0x00007f5e52b25faa in dwfl_getthreads () from /<<NIX>>/elfutils-0.192/lib/libdw.so.1
#11 0x00007f5e52b26514 in dwfl_getthread_frames () from /<<NIX>>/elfutils-0.192/lib/libdw.so.1
#12 0x000000000068c6ce in unwind__get_entries (cb=cb@entry=0x5d4620 <unwind_entry>, arg=arg@entry=0x10cd5fa0,
thread=thread@entry=0x1076a290, data=data@entry=0x7fff9df80540, max_stack=max_stack@entry=127,
best_effort=best_effort@entry=false) at util/thread.h:152
#13 0x00000000005dae95 in thread__resolve_callchain_unwind (evsel=0x106006d0, thread=0x1076a290, cursor=0x10cd5fa0,
sample=0x7fff9df80540, max_stack=127, symbols=true) at util/machine.c:2939
#14 thread__resolve_callchain_unwind (thread=0x1076a290, cursor=0x10cd5fa0, evsel=0x106006d0, sample=0x7fff9df80540,
max_stack=127, symbols=true) at util/machine.c:2920
#15 __thread__resolve_callchain (thread=0x1076a290, cursor=0x10cd5fa0, evsel=0x106006d0, evsel@entry=0x7fff9df80440,
sample=0x7fff9df80540, parent=parent@entry=0x7fff9df804a0, root_al=root_al@entry=0x7fff9df80440, max_stack=127, symbols=true)
at util/machine.c:2970
#16 0x00000000005d0cb2 in thread__resolve_callchain (thread=<optimized out>, cursor=<optimized out>, evsel=0x7fff9df80440,
sample=<optimized out>, parent=0x7fff9df804a0, root_al=0x7fff9df80440, max_stack=127) at util/machine.h:198
#17 sample__resolve_callchain (sample=<optimized out>, cursor=<optimized out>, parent=parent@entry=0x7fff9df804a0,
evsel=evsel@entry=0x106006d0, al=al@entry=0x7fff9df80440, max_stack=max_stack@entry=127) at util/callchain.c:1127
#18 0x0000000000617e08 in hist_entry_iter__add (iter=iter@entry=0x7fff9df80480, al=al@entry=0x7fff9df80440, max_stack_depth=127,
arg=arg@entry=0x7fff9df81ae0) at util/hist.c:1255
#19 0x000000000045d2d0 in process_sample_event (tool=0x7fff9df81ae0, event=<optimized out>, sample=0x7fff9df80540,
evsel=0x106006d0, machine=<optimized out>) at builtin-report.c:334
#20 0x00000000005e3bb1 in perf_session__deliver_event (session=0x105ff2c0, event=0x7f5c7d735ca0, tool=0x7fff9df81ae0,
file_offset=2914716832, file_path=0x105ffbf0 "perf.data") at util/session.c:1367
#21 0x00000000005e8d93 in do_flush (oe=0x105ffa50, show_progress=false) at util/ordered-events.c:245
#22 __ordered_events__flush (oe=0x105ffa50, how=OE_FLUSH__ROUND, timestamp=<optimized out>) at util/ordered-events.c:324
#23 0x00000000005e1f64 in perf_session__process_user_event (session=0x105ff2c0, event=0x7f5c7d752b18, file_offset=2914835224,
file_path=0x105ffbf0 "perf.data") at util/session.c:1419
#24 0x00000000005e47c7 in reader__read_event (rd=rd@entry=0x7fff9df81260, session=session@entry=0x105ff2c0,
--Type <RET> for more, q to quit, c to continue without paging--
quit
prog=prog@entry=0x7fff9df81220) at util/session.c:2132
#25 0x00000000005e4b37 in reader__process_events (rd=0x7fff9df81260, session=0x105ff2c0, prog=0x7fff9df81220)
at util/session.c:2181
#26 __perf_session__process_events (session=0x105ff2c0) at util/session.c:2226
#27 perf_session__process_events (session=session@entry=0x105ff2c0) at util/session.c:2390
#28 0x0000000000460add in __cmd_report (rep=0x7fff9df81ae0) at builtin-report.c:1076
#29 cmd_report (argc=<optimized out>, argv=<optimized out>) at builtin-report.c:1827
#30 0x00000000004c5a40 in run_builtin (p=p@entry=0xd8f7f8 <commands+312>, argc=argc@entry=1, argv=argv@entry=0x7fff9df844b0)
at perf.c:351
#31 0x00000000004c5d63 in handle_internal_command (argc=argc@entry=1, argv=argv@entry=0x7fff9df844b0) at perf.c:404
#32 0x0000000000442de3 in run_argv (argcp=<synthetic pointer>, argv=<synthetic pointer>) at perf.c:448
#33 main (argc=<optimized out>, argv=0x7fff9df844b0) at perf.c:556
The hangup happens because nothing in` perf` or `elfutils` checks if a
mapped file is easily readable.
The change conservatively skips all non-regular files.
Signed-off-by: Sergei Trofimovich <[email protected]>
Acked-by: Namhyung Kim <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Namhyung Kim <[email protected]>
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Aug 22, 2025
JIRA: https://issues.redhat.com/browse/RHEL-101770 Upstream Status: since v6.13 CVE: CVE-2024-56629 Tested: with the hid-tools test suite and some hardware commit 5954821 Author: WangYuli <[email protected]> Date: Mon Nov 25 13:26:16 2024 +0800 HID: wacom: fix when get product name maybe null pointer Due to incorrect dev->product reporting by certain devices, null pointer dereferences occur when dev->product is empty, leading to potential system crashes. This issue was found on EXCELSIOR DL37-D05 device with Loongson-LS3A6000-7A2000-DL37 motherboard. Kernel logs: [ 56.470885] usb 4-3: new full-speed USB device number 4 using ohci-pci [ 56.671638] usb 4-3: string descriptor 0 read error: -22 [ 56.671644] usb 4-3: New USB device found, idVendor=056a, idProduct=0374, bcdDevice= 1.07 [ 56.671647] usb 4-3: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ 56.678839] hid-generic 0003:056A:0374.0004: hiddev0,hidraw3: USB HID v1.10 Device [HID 056a:0374] on usb-0000:00:05.0-3/input0 [ 56.697719] CPU 2 Unable to handle kernel paging request at virtual address 0000000000000000, era == 90000000066e35c8, ra == ffff800004f98a80 [ 56.697732] Oops[#1]: [ 56.697734] CPU: 2 PID: 2742 Comm: (udev-worker) Tainted: G OE 6.6.0-loong64-desktop #25.00.2000.015 [ 56.697737] Hardware name: Inspur CE520L2/C09901N000000000, BIOS 2.09.00 10/11/2024 [ 56.697739] pc 90000000066e35c8 ra ffff800004f98a80 tp 9000000125478000 sp 900000012547b8a0 [ 56.697741] a0 0000000000000000 a1 ffff800004818b28 a2 0000000000000000 a3 0000000000000000 [ 56.697743] a4 900000012547b8f0 a5 0000000000000000 a6 0000000000000000 a7 0000000000000000 [ 56.697745] t0 ffff800004818b2d t1 0000000000000000 t2 0000000000000003 t3 0000000000000005 [ 56.697747] t4 0000000000000000 t5 0000000000000000 t6 0000000000000000 t7 0000000000000000 [ 56.697748] t8 0000000000000000 u0 0000000000000000 s9 0000000000000000 s0 900000011aa48028 [ 56.697750] s1 0000000000000000 s2 0000000000000000 s3 ffff800004818e80 s4 ffff800004810000 [ 56.697751] s5 90000001000b98d0 s6 ffff800004811f88 s7 ffff800005470440 s8 0000000000000000 [ 56.697753] ra: ffff800004f98a80 wacom_update_name+0xe0/0x300 [wacom] [ 56.697802] ERA: 90000000066e35c8 strstr+0x28/0x120 [ 56.697806] CRMD: 000000b0 (PLV0 -IE -DA +PG DACF=CC DACM=CC -WE) [ 56.697816] PRMD: 0000000c (PPLV0 +PIE +PWE) [ 56.697821] EUEN: 00000000 (-FPE -SXE -ASXE -BTE) [ 56.697827] ECFG: 00071c1d (LIE=0,2-4,10-12 VS=7) [ 56.697831] ESTAT: 00010000 [PIL] (IS= ECode=1 EsubCode=0) [ 56.697835] BADV: 0000000000000000 [ 56.697836] PRID: 0014d000 (Loongson-64bit, Loongson-3A6000) [ 56.697838] Modules linked in: wacom(+) bnep bluetooth rfkill qrtr nls_iso8859_1 nls_cp437 snd_hda_codec_conexant snd_hda_codec_generic ledtrig_audio snd_hda_codec_hdmi snd_hda_intel snd_intel_dspcfg snd_hda_codec snd_hda_core snd_hwdep snd_pcm snd_timer snd soundcore input_leds mousedev led_class joydev deepin_netmonitor(OE) fuse nfnetlink dmi_sysfs ip_tables x_tables overlay amdgpu amdxcp drm_exec gpu_sched drm_buddy radeon drm_suballoc_helper i2c_algo_bit drm_ttm_helper r8169 ttm drm_display_helper spi_loongson_pci xhci_pci cec xhci_pci_renesas spi_loongson_core hid_generic realtek gpio_loongson_64bit [ 56.697887] Process (udev-worker) (pid: 2742, threadinfo=00000000aee0d8b4, task=00000000a9eff1f3) [ 56.697890] Stack : 0000000000000000 ffff800004817e00 0000000000000000 0000251c00000000 [ 56.697896] 0000000000000000 00000011fffffffd 0000000000000000 0000000000000000 [ 56.697901] 0000000000000000 1b67a968695184b9 0000000000000000 90000001000b98d0 [ 56.697906] 90000001000bb8d0 900000011aa48028 0000000000000000 ffff800004f9d74c [ 56.697911] 90000001000ba000 ffff800004f9ce58 0000000000000000 ffff800005470440 [ 56.697916] ffff800004811f88 90000001000b98d0 9000000100da2aa8 90000001000bb8d0 [ 56.697921] 0000000000000000 90000001000ba000 900000011aa48028 ffff800004f9d74c [ 56.697926] ffff8000054704e8 90000001000bb8b8 90000001000ba000 0000000000000000 [ 56.697931] 90000001000bb8d0 9000000006307564 9000000005e666e0 90000001752359b8 [ 56.697936] 9000000008cbe400 900000000804d000 9000000005e666e0 0000000000000000 [ 56.697941] ... [ 56.697944] Call Trace: [ 56.697945] [<90000000066e35c8>] strstr+0x28/0x120 [ 56.697950] [<ffff800004f98a80>] wacom_update_name+0xe0/0x300 [wacom] [ 56.698000] [<ffff800004f9ce58>] wacom_parse_and_register+0x338/0x900 [wacom] [ 56.698050] [<ffff800004f9d74c>] wacom_probe+0x32c/0x420 [wacom] [ 56.698099] [<9000000006307564>] hid_device_probe+0x144/0x260 [ 56.698103] [<9000000005e65d68>] really_probe+0x208/0x540 [ 56.698109] [<9000000005e661dc>] __driver_probe_device+0x13c/0x1e0 [ 56.698112] [<9000000005e66620>] driver_probe_device+0x40/0x100 [ 56.698116] [<9000000005e6680c>] __device_attach_driver+0x12c/0x180 [ 56.698119] [<9000000005e62bc8>] bus_for_each_drv+0x88/0x160 [ 56.698123] [<9000000005e66468>] __device_attach+0x108/0x260 [ 56.698126] [<9000000005e63918>] device_reprobe+0x78/0x100 [ 56.698129] [<9000000005e62a68>] bus_for_each_dev+0x88/0x160 [ 56.698132] [<9000000006304e54>] __hid_bus_driver_added+0x34/0x80 [ 56.698134] [<9000000005e62bc8>] bus_for_each_drv+0x88/0x160 [ 56.698137] [<9000000006304df0>] __hid_register_driver+0x70/0xa0 [ 56.698142] [<9000000004e10fe4>] do_one_initcall+0x104/0x320 [ 56.698146] [<9000000004f38150>] do_init_module+0x90/0x2c0 [ 56.698151] [<9000000004f3a3d8>] init_module_from_file+0xb8/0x120 [ 56.698155] [<9000000004f3a590>] idempotent_init_module+0x150/0x3a0 [ 56.698159] [<9000000004f3a890>] sys_finit_module+0xb0/0x140 [ 56.698163] [<900000000671e4e8>] do_syscall+0x88/0xc0 [ 56.698166] [<9000000004e12404>] handle_syscall+0xc4/0x160 [ 56.698171] Code: 0011958f 00150224 5800cd85 <2a00022c> 00150004 4000c180 0015022c 03400000 03400000 [ 56.698192] ---[ end trace 0000000000000000 ]--- Fixes: 09dc28a ("HID: wacom: Improve generic name generation") Reported-by: Zhenxing Chen <[email protected]> Co-developed-by: Xu Rao <[email protected]> Signed-off-by: Xu Rao <[email protected]> Signed-off-by: WangYuli <[email protected]> Link: https://patch.msgid.link/[email protected] Cc: [email protected] Signed-off-by: Benjamin Tissoires <[email protected]> Signed-off-by: Benjamin Tissoires <[email protected]>
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Aug 23, 2025
JIRA: https://issues.redhat.com/browse/RHEL-102058 Upstream Status: since v6.13 commit 5954821 Author: WangYuli <[email protected]> Date: Mon Nov 25 13:26:16 2024 +0800 HID: wacom: fix when get product name maybe null pointer Due to incorrect dev->product reporting by certain devices, null pointer dereferences occur when dev->product is empty, leading to potential system crashes. This issue was found on EXCELSIOR DL37-D05 device with Loongson-LS3A6000-7A2000-DL37 motherboard. Kernel logs: [ 56.470885] usb 4-3: new full-speed USB device number 4 using ohci-pci [ 56.671638] usb 4-3: string descriptor 0 read error: -22 [ 56.671644] usb 4-3: New USB device found, idVendor=056a, idProduct=0374, bcdDevice= 1.07 [ 56.671647] usb 4-3: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ 56.678839] hid-generic 0003:056A:0374.0004: hiddev0,hidraw3: USB HID v1.10 Device [HID 056a:0374] on usb-0000:00:05.0-3/input0 [ 56.697719] CPU 2 Unable to handle kernel paging request at virtual address 0000000000000000, era == 90000000066e35c8, ra == ffff800004f98a80 [ 56.697732] Oops[#1]: [ 56.697734] CPU: 2 PID: 2742 Comm: (udev-worker) Tainted: G OE 6.6.0-loong64-desktop #25.00.2000.015 [ 56.697737] Hardware name: Inspur CE520L2/C09901N000000000, BIOS 2.09.00 10/11/2024 [ 56.697739] pc 90000000066e35c8 ra ffff800004f98a80 tp 9000000125478000 sp 900000012547b8a0 [ 56.697741] a0 0000000000000000 a1 ffff800004818b28 a2 0000000000000000 a3 0000000000000000 [ 56.697743] a4 900000012547b8f0 a5 0000000000000000 a6 0000000000000000 a7 0000000000000000 [ 56.697745] t0 ffff800004818b2d t1 0000000000000000 t2 0000000000000003 t3 0000000000000005 [ 56.697747] t4 0000000000000000 t5 0000000000000000 t6 0000000000000000 t7 0000000000000000 [ 56.697748] t8 0000000000000000 u0 0000000000000000 s9 0000000000000000 s0 900000011aa48028 [ 56.697750] s1 0000000000000000 s2 0000000000000000 s3 ffff800004818e80 s4 ffff800004810000 [ 56.697751] s5 90000001000b98d0 s6 ffff800004811f88 s7 ffff800005470440 s8 0000000000000000 [ 56.697753] ra: ffff800004f98a80 wacom_update_name+0xe0/0x300 [wacom] [ 56.697802] ERA: 90000000066e35c8 strstr+0x28/0x120 [ 56.697806] CRMD: 000000b0 (PLV0 -IE -DA +PG DACF=CC DACM=CC -WE) [ 56.697816] PRMD: 0000000c (PPLV0 +PIE +PWE) [ 56.697821] EUEN: 00000000 (-FPE -SXE -ASXE -BTE) [ 56.697827] ECFG: 00071c1d (LIE=0,2-4,10-12 VS=7) [ 56.697831] ESTAT: 00010000 [PIL] (IS= ECode=1 EsubCode=0) [ 56.697835] BADV: 0000000000000000 [ 56.697836] PRID: 0014d000 (Loongson-64bit, Loongson-3A6000) [ 56.697838] Modules linked in: wacom(+) bnep bluetooth rfkill qrtr nls_iso8859_1 nls_cp437 snd_hda_codec_conexant snd_hda_codec_generic ledtrig_audio snd_hda_codec_hdmi snd_hda_intel snd_intel_dspcfg snd_hda_codec snd_hda_core snd_hwdep snd_pcm snd_timer snd soundcore input_leds mousedev led_class joydev deepin_netmonitor(OE) fuse nfnetlink dmi_sysfs ip_tables x_tables overlay amdgpu amdxcp drm_exec gpu_sched drm_buddy radeon drm_suballoc_helper i2c_algo_bit drm_ttm_helper r8169 ttm drm_display_helper spi_loongson_pci xhci_pci cec xhci_pci_renesas spi_loongson_core hid_generic realtek gpio_loongson_64bit [ 56.697887] Process (udev-worker) (pid: 2742, threadinfo=00000000aee0d8b4, task=00000000a9eff1f3) [ 56.697890] Stack : 0000000000000000 ffff800004817e00 0000000000000000 0000251c00000000 [ 56.697896] 0000000000000000 00000011fffffffd 0000000000000000 0000000000000000 [ 56.697901] 0000000000000000 1b67a968695184b9 0000000000000000 90000001000b98d0 [ 56.697906] 90000001000bb8d0 900000011aa48028 0000000000000000 ffff800004f9d74c [ 56.697911] 90000001000ba000 ffff800004f9ce58 0000000000000000 ffff800005470440 [ 56.697916] ffff800004811f88 90000001000b98d0 9000000100da2aa8 90000001000bb8d0 [ 56.697921] 0000000000000000 90000001000ba000 900000011aa48028 ffff800004f9d74c [ 56.697926] ffff8000054704e8 90000001000bb8b8 90000001000ba000 0000000000000000 [ 56.697931] 90000001000bb8d0 9000000006307564 9000000005e666e0 90000001752359b8 [ 56.697936] 9000000008cbe400 900000000804d000 9000000005e666e0 0000000000000000 [ 56.697941] ... [ 56.697944] Call Trace: [ 56.697945] [<90000000066e35c8>] strstr+0x28/0x120 [ 56.697950] [<ffff800004f98a80>] wacom_update_name+0xe0/0x300 [wacom] [ 56.698000] [<ffff800004f9ce58>] wacom_parse_and_register+0x338/0x900 [wacom] [ 56.698050] [<ffff800004f9d74c>] wacom_probe+0x32c/0x420 [wacom] [ 56.698099] [<9000000006307564>] hid_device_probe+0x144/0x260 [ 56.698103] [<9000000005e65d68>] really_probe+0x208/0x540 [ 56.698109] [<9000000005e661dc>] __driver_probe_device+0x13c/0x1e0 [ 56.698112] [<9000000005e66620>] driver_probe_device+0x40/0x100 [ 56.698116] [<9000000005e6680c>] __device_attach_driver+0x12c/0x180 [ 56.698119] [<9000000005e62bc8>] bus_for_each_drv+0x88/0x160 [ 56.698123] [<9000000005e66468>] __device_attach+0x108/0x260 [ 56.698126] [<9000000005e63918>] device_reprobe+0x78/0x100 [ 56.698129] [<9000000005e62a68>] bus_for_each_dev+0x88/0x160 [ 56.698132] [<9000000006304e54>] __hid_bus_driver_added+0x34/0x80 [ 56.698134] [<9000000005e62bc8>] bus_for_each_drv+0x88/0x160 [ 56.698137] [<9000000006304df0>] __hid_register_driver+0x70/0xa0 [ 56.698142] [<9000000004e10fe4>] do_one_initcall+0x104/0x320 [ 56.698146] [<9000000004f38150>] do_init_module+0x90/0x2c0 [ 56.698151] [<9000000004f3a3d8>] init_module_from_file+0xb8/0x120 [ 56.698155] [<9000000004f3a590>] idempotent_init_module+0x150/0x3a0 [ 56.698159] [<9000000004f3a890>] sys_finit_module+0xb0/0x140 [ 56.698163] [<900000000671e4e8>] do_syscall+0x88/0xc0 [ 56.698166] [<9000000004e12404>] handle_syscall+0xc4/0x160 [ 56.698171] Code: 0011958f 00150224 5800cd85 <2a00022c> 00150004 4000c180 0015022c 03400000 03400000 [ 56.698192] ---[ end trace 0000000000000000 ]--- Fixes: 09dc28a ("HID: wacom: Improve generic name generation") Reported-by: Zhenxing Chen <[email protected]> Co-developed-by: Xu Rao <[email protected]> Signed-off-by: Xu Rao <[email protected]> Signed-off-by: WangYuli <[email protected]> Link: https://patch.msgid.link/[email protected] Cc: [email protected] Signed-off-by: Benjamin Tissoires <[email protected]> Signed-off-by: Benjamin Tissoires <[email protected]>
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If we hit an error path in GEM obj creation before msm_gem_new_handle()
updates obj->resv to point to the gpuvm resv object, then obj->resv
still points to &obj->_resv. In this case we don't want to decrement
the refcount of the object being freed (since the refcnt is already
zero). This fixes the following splat:
------------[ cut here ]------------
refcount_t: underflow; use-after-free.
WARNING: CPU: 9 PID: 7013 at lib/refcount.c:28 refcount_warn_saturate+0xf4/0x148
Modules linked in: uinput snd_seq_dummy snd_hrtimer aes_ce_ccm snd_soc_wsa884x regmap_sdw q6prm_clocks q6apm_lpass_da>
qcom_pil_info i2c_hid drm_kms_helper qcom_common qcom_q6v5 phy_snps_eusb2 qcom_geni_serial drm qcom_sysmon pinctrl_s>
CPU: 9 UID: 1000 PID: 7013 Comm: deqp-vk Not tainted 6.16.0-rc4-debug+ #25 PREEMPT(voluntary)
Hardware name: LENOVO 83ED/LNVNB161216, BIOS NHCN53WW 08/02/2024
pstate: 61400005 (nZCv daif +PAN -UAO -TCO +DIT -SSBS BTYPE=--)
pc : refcount_warn_saturate+0xf4/0x148
lr : refcount_warn_saturate+0xf4/0x148
sp : ffff8000a2073920
x29: ffff8000a2073920 x28: 0000000000000010 x27: 0000000000000010
x26: 0000000000000042 x25: ffff000810e09800 x24: 0000000000000010
x23: ffff8000a2073b94 x22: ffff000ddb22de00 x21: ffff000ddb22dc00
x20: ffff000ddb22ddf8 x19: ffff0008024934e0 x18: 000000000000000a
x17: 0000000000000000 x16: ffff9f8c67d77340 x15: 0000000000000000
x14: 00000000ffffffff x13: 2e656572662d7265 x12: 7466612d65737520
x11: 3b776f6c66726564 x10: 00000000ffff7fff x9 : ffff9f8c67506c70
x8 : ffff9f8c69fa26f0 x7 : 00000000000bffe8 x6 : c0000000ffff7fff
x5 : ffff000f53e14548 x4 : ffff6082ea2b2000 x3 : ffff0008b86ab080
x2 : 0000000000000000 x1 : 0000000000000000 x0 : ffff0008b86ab080
Call trace:
refcount_warn_saturate+0xf4/0x148 (P)
msm_gem_free_object+0x248/0x260 [msm]
drm_gem_object_free+0x24/0x40 [drm]
msm_gem_new+0x1c4/0x1e0 [msm]
msm_gem_new_handle+0x3c/0x1a0 [msm]
msm_ioctl_gem_new+0x38/0x70 [msm]
drm_ioctl_kernel+0xc8/0x138 [drm]
drm_ioctl+0x2c8/0x618 [drm]
__arm64_sys_ioctl+0xac/0x108
invoke_syscall.constprop.0+0x64/0xe8
el0_svc_common.constprop.0+0x40/0xe8
do_el0_svc+0x24/0x38
el0_svc+0x54/0x1d8
el0t_64_sync_handler+0x10c/0x138
el0t_64_sync+0x19c/0x1a0
irq event stamp: 3698694
hardirqs last enabled at (3698693): [<ffff9f8c675021dc>] __up_console_sem+0x74/0x90
hardirqs last disabled at (3698694): [<ffff9f8c68ce8164>] el1_dbg+0x24/0x90
softirqs last enabled at (3697578): [<ffff9f8c6744ec5c>] handle_softirqs+0x454/0x4b0
softirqs last disabled at (3697567): [<ffff9f8c67360244>] __do_softirq+0x1c/0x28
---[ end trace 0000000000000000 ]---
Fixes: b58e12a ("drm/msm: Add _NO_SHARE flag")
Signed-off-by: Rob Clark <[email protected]>
Patchwork: https://patchwork.freedesktop.org/patch/665355/
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submit_unpin_objects() should come before we unlock the objects. This
fixes the splat:
WARNING: CPU: 2 PID: 2171 at drivers/gpu/drm/msm/msm_gem.h:395 msm_gem_unpin_locked+0x8c/0xd8 [msm]
Modules linked in: uinput snd_seq_dummy snd_hrtimer aes_ce_ccm snd_soc_wsa884x regmap_sdw q6prm_clocks q6apm_lpass_dais q6apm_dai snd_q6dsp_common q6prm snd_q6apm qcom_pd_mapper cdc_mbim cdc_wdm cdc_ncm r8153_ecm cdc_ether usbnet sunrpc nls_ascii nls_cp437 vfat fat snd_soc_x1e80100 snd_soc_lpass_rx_macro snd_soc_lpass_tx_macro snd_soc_lpass_va_macro snd_soc_lpass_wsa_macro snd_soc_qcom_common soundwire_qcom snd_soc_lpass_macro_common snd_soc_hdmi_codec snd_soc_qcom_sdw ext4 snd_soc_core snd_compress soundwire_bus snd_pcm_dmaengine snd_seq mbcache jbd2 snd_seq_device snd_pcm pm8941_pwrkey snd_timer r8152 qcom_spmi_temp_alarm industrialio snd lenovo_yoga_slim7x ath12k mii arm_smccc_trng soundcore rng_core evdev loop panel_samsung_atna33xc20 msm ubwc_config drm_client_lib drm_gpuvm drm_exec gpu_sched drm_display_helper pmic_glink_altmode aux_hpd_bridge ucsi_glink qcom_battmgr phy_qcom_qmp_combo ps883x cec aux_bridge drm_dp_aux_bus i2c_hid_of aes_ce_blk drm_kms_helper aes_ce_cipher i2c_hid qcom_q6v5_pas
ghash_ce qcom_pil_info drm sha1_ce qcom_common phy_snps_eusb2 qcom_geni_serial qcom_q6v5 qcom_sysmon pinctrl_sm8550_lpass_lpi lpasscc_sc8280xp sbsa_gwdt mdt_loader gpio_keys pmic_glink i2c_dev efivarfs autofs4
CPU: 2 UID: 1000 PID: 2171 Comm: gnome-shell Not tainted 6.16.0-rc4-debug+ #25 PREEMPT(voluntary)
Hardware name: LENOVO 83ED/LNVNB161216, BIOS NHCN53WW 08/02/2024
pstate: 61400005 (nZCv daif +PAN -UAO -TCO +DIT -SSBS BTYPE=--)
pc : msm_gem_unpin_locked+0x8c/0xd8 [msm]
lr : msm_gem_unpin_locked+0x88/0xd8 [msm]
sp : ffff80009c963820
x29: ffff80009c963820 x28: ffff80009c9639f8 x27: ffff00080552a830
x26: 0000000000000000 x25: ffff0009d5655800 x24: 0000000000000000
x23: 0000000000000000 x22: 0000000000000000 x21: 0000000000000000
x20: ffff000831db5480 x19: ffff000816e74400 x18: 0000000000000000
x17: 0000000000000000 x16: ffffc1396afdd720 x15: 0000000000000000
x14: 0000000000000000 x13: 0000000000000000 x12: ffff0008c065bc00
x11: ffff0008c065c000 x10: 0000000000000000 x9 : ffffc13945b19074
x8 : 0000000000000000 x7 : 0000000000000209 x6 : 0000000000000002
x5 : 0000000000019d01 x4 : ffff0008ba8db080 x3 : 000000000004093f
x2 : ffff3ed5e727f000 x1 : 0000000000000000 x0 : 0000000000000000
Call trace:
msm_gem_unpin_locked+0x8c/0xd8 [msm] (P)
msm_ioctl_gem_submit+0x32c/0x1760 [msm]
drm_ioctl_kernel+0xc8/0x138 [drm]
drm_ioctl+0x2c8/0x618 [drm]
__arm64_sys_ioctl+0xac/0x108
invoke_syscall.constprop.0+0x64/0xe8
el0_svc_common.constprop.0+0x40/0xe8
do_el0_svc+0x24/0x38
el0_svc+0x54/0x1d8
el0t_64_sync_handler+0x10c/0x138
el0t_64_sync+0x19c/0x1a0
irq event stamp: 2185036
hardirqs last enabled at (2185035): [<ffffc1396afeef9c>] _raw_spin_unlock_irqrestore+0x74/0x80
hardirqs last disabled at (2185036): [<ffffc1396afd8164>] el1_dbg+0x24/0x90
softirqs last enabled at (2184778): [<ffffc13969675e44>] fpsimd_restore_current_state+0x3c/0x328
softirqs last disabled at (2184776): [<ffffc13969675e14>] fpsimd_restore_current_state+0xc/0x328
---[ end trace 0000000000000000 ]---
Fixes: 111fdd2 ("drm/msm: drm_gpuvm conversion")
Signed-off-by: Rob Clark <[email protected]>
Patchwork: https://patchwork.freedesktop.org/patch/665357/
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jira LE-2125
Running bpf selftests can result in the fatal error below with certain CPU and LLVM version combinations:
This PR backports the following upstream fix for this situation:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/tools/testing/selftests/bpf/progs/pyperf180.c?h=v6.13-rc1&id=100888fb6d8a185866b1520031ee7e3182b173de
Below are logs from running bpf selftests before and after the fix:
bpf_selftests_88-rt-before.log
bpf_selftests_88-rt-after.log