From: Eric Biggers Date: Wed, 1 May 2024 02:53:31 +0000 (-0700) Subject: fsverity: use register_sysctl_init() to avoid kmemleak warning X-Git-Tag: io_uring-6.10-20240523~90^2 X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=ee5814dddefbaa181cb247a75676dd5103775db1;p=linux-2.6-block.git fsverity: use register_sysctl_init() to avoid kmemleak warning 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 Closes: https://lore.kernel.org/r/CAHj4cs8DTSvR698UE040rs_pX1k-WVe7aR6N2OoXXuhXJPDC-w@mail.gmail.com Cc: stable@vger.kernel.org Reviewed-by: Joel Granados Link: https://lore.kernel.org/r/20240501025331.594183-1-ebiggers@kernel.org Signed-off-by: Eric Biggers --- diff --git a/fs/verity/init.c b/fs/verity/init.c index cb2c9aac61ed..f440f0e61e3e 100644 --- a/fs/verity/init.c +++ b/fs/verity/init.c @@ -10,8 +10,6 @@ #include #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)