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fsverity: use register_sysctl_init() to avoid kmemleak warning

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Since the fsverity sysctl registration runs as a builtin initcall, there
is no corresponding sysctl deregistration and the resulting struct
ctl_table_header is not used.  This can cause a kmemleak warning just
after the system boots up.  (A pointer to the ctl_table_header is stored
in the fsverity_sysctl_header static variable, which kmemleak should
detect; however, the compiler can optimize out that variable.)  Avoid
the kmemleak warning by using register_sysctl_init() which is intended
for use by builtin initcalls and uses kmemleak_not_leak().

Reported-by: Yi Zhang <yi.zhang@redhat.com>
Closes: https://lore.kernel.org/r/CAHj4cs8DTSvR698UE040rs_pX1k-WVe7aR6N2OoXXuhXJPDC-w@mail.gmail.com
Cc: stable@vger.kernel.org
Reviewed-by: Joel Granados <j.granados@samsung.com>
Link: https://lore.kernel.org/r/20240501025331.594183-1-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@google.com>
This commit is contained in:
Eric Biggers 2024-04-30 19:53:31 -07:00
parent e67572cd22
commit ee5814ddde
1 changed files with 1 additions and 6 deletions
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7
fs/verity/init.c
View File

@ -10,8 +10,6 @@
#include <linux/ratelimit.h>
#ifdef CONFIG_SYSCTL
static struct ctl_table_header *fsverity_sysctl_header;
static struct ctl_table fsverity_sysctl_table[] = {
#ifdef CONFIG_FS_VERITY_BUILTIN_SIGNATURES
{
@ -28,10 +26,7 @@ static struct ctl_table fsverity_sysctl_table[] = {
static void __init fsverity_init_sysctl(void)
{
fsverity_sysctl_header = register_sysctl("fs/verity",
fsverity_sysctl_table);
if (!fsverity_sysctl_header)
panic("fsverity sysctl registration failed");
register_sysctl_init("fs/verity", fsverity_sysctl_table);
}
#else /* CONFIG_SYSCTL */
static inline void fsverity_init_sysctl(void)