-Wsometimes-uninitialized in fs/ntfs3/namei.c

[nathanchance]

fs/ntfs3/namei.c:445:7: error: variable 'uni1' is used uninitialized whenever 'if' condition is true [-Werror,-Wsometimes-uninitialized]
                if (toupper(c1) != toupper(c2)) {
                    ^~~~~~~~~~~~~~~~~~~~~~~~~~
./include/linux/ctype.h:64:20: note: expanded from macro 'toupper'
#define toupper(c) __toupper(c)
                   ^
fs/ntfs3/namei.c:487:12: note: uninitialized use occurs here
        __putname(uni1);
                  ^~~~
./include/linux/fs.h:2789:65: note: expanded from macro '__putname'
#define __putname(name)         kmem_cache_free(names_cachep, (void *)(name))
                                                                       ^~~~
fs/ntfs3/namei.c:445:3: note: remove the 'if' if its condition is always false
                if (toupper(c1) != toupper(c2)) {
                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
fs/ntfs3/namei.c:434:7: error: variable 'uni1' is used uninitialized whenever 'if' condition is true [-Werror,-Wsometimes-uninitialized]
                if (!lm--) {
                    ^~~~~
fs/ntfs3/namei.c:487:12: note: uninitialized use occurs here
        __putname(uni1);
                  ^~~~
./include/linux/fs.h:2789:65: note: expanded from macro '__putname'
#define __putname(name)         kmem_cache_free(names_cachep, (void *)(name))
                                                                       ^~~~
fs/ntfs3/namei.c:434:3: note: remove the 'if' if its condition is always false
                if (!lm--) {
                ^~~~~~~~~~~~
fs/ntfs3/namei.c:430:22: note: initialize the variable 'uni1' to silence this warning
        struct cpu_str *uni1, *uni2;
                            ^
                             = NULL
2 errors generated.

Patch submitted: https://lore.kernel.org/20221004144145.1345772-1-nathan@kernel.org/

[nickdesaulniers]

v2: https://lore.kernel.org/llvm/20221004232359.285685-1-nathan@kernel.org/

[nathanchance]

Now fixed in -next: https://git.kernel.org/next/linux-next/c/0d6d7c61ffeedc782b651a080ad6543ad45314b6