vfs/xattr: mm/shmem: kernfs: release simple xattr entry in a right way

After commit fdc8522 ("kernfs: kvmalloc xattr value instead of
kmalloc"), simple xattr entry is allocated with kvmalloc() instead of
kmalloc(), so we should release it with kvfree() instead of kfree().

Fixes: fdc8522 ("kernfs: kvmalloc xattr value instead of kmalloc")
Signed-off-by: Chengguang Xu <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Acked-by: Hugh Dickins <[email protected]>
Acked-by: Tejun Heo <[email protected]>
Cc: Daniel Xu <[email protected]>
Cc: Chris Down <[email protected]>
Cc: Andreas Dilger <[email protected]>
Cc: Greg Kroah-Hartman <[email protected]>
Cc: Al Viro <[email protected]>
Cc: <[email protected]>	[5.7]
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Linus Torvalds <[email protected]>

Author: cgxu519

include/linux/xattr.h

@@ -15,6 +15,7 @@
 #include <linux/slab.h>
 #include <linux/types.h>
 #include <linux/spinlock.h>
+#include <linux/mm.h>
 #include <uapi/linux/xattr.h>
 
 struct inode;
@@ -94,7 +95,7 @@ static inline void simple_xattrs_free(struct simple_xattrs *xattrs)
 
 	list_for_each_entry_safe(xattr, node, &xattrs->head, list) {
 		kfree(xattr->name);
-		kfree(xattr);
+		kvfree(xattr);
 	}
 }
 

mm/shmem.c

@@ -3178,7 +3178,7 @@ static int shmem_initxattrs(struct inode *inode,
 		new_xattr->name = kmalloc(XATTR_SECURITY_PREFIX_LEN + len,
 					  GFP_KERNEL);
 		if (!new_xattr->name) {
-			kfree(new_xattr);
+			kvfree(new_xattr);
 			return -ENOMEM;
 		}