mirror of
https://github.com/torvalds/linux.git
synced 2024-11-22 20:22:09 +00:00
ee5814ddde
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>
70 lines
1.5 KiB
C
70 lines
1.5 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* fs-verity module initialization and logging
|
|
*
|
|
* Copyright 2019 Google LLC
|
|
*/
|
|
|
|
#include "fsverity_private.h"
|
|
|
|
#include <linux/ratelimit.h>
|
|
|
|
#ifdef CONFIG_SYSCTL
|
|
static struct ctl_table fsverity_sysctl_table[] = {
|
|
#ifdef CONFIG_FS_VERITY_BUILTIN_SIGNATURES
|
|
{
|
|
.procname = "require_signatures",
|
|
.data = &fsverity_require_signatures,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = proc_dointvec_minmax,
|
|
.extra1 = SYSCTL_ZERO,
|
|
.extra2 = SYSCTL_ONE,
|
|
},
|
|
#endif
|
|
};
|
|
|
|
static void __init fsverity_init_sysctl(void)
|
|
{
|
|
register_sysctl_init("fs/verity", fsverity_sysctl_table);
|
|
}
|
|
#else /* CONFIG_SYSCTL */
|
|
static inline void fsverity_init_sysctl(void)
|
|
{
|
|
}
|
|
#endif /* !CONFIG_SYSCTL */
|
|
|
|
void fsverity_msg(const struct inode *inode, const char *level,
|
|
const char *fmt, ...)
|
|
{
|
|
static DEFINE_RATELIMIT_STATE(rs, DEFAULT_RATELIMIT_INTERVAL,
|
|
DEFAULT_RATELIMIT_BURST);
|
|
struct va_format vaf;
|
|
va_list args;
|
|
|
|
if (!__ratelimit(&rs))
|
|
return;
|
|
|
|
va_start(args, fmt);
|
|
vaf.fmt = fmt;
|
|
vaf.va = &args;
|
|
if (inode)
|
|
printk("%sfs-verity (%s, inode %lu): %pV\n",
|
|
level, inode->i_sb->s_id, inode->i_ino, &vaf);
|
|
else
|
|
printk("%sfs-verity: %pV\n", level, &vaf);
|
|
va_end(args);
|
|
}
|
|
|
|
static int __init fsverity_init(void)
|
|
{
|
|
fsverity_check_hash_algs();
|
|
fsverity_init_info_cache();
|
|
fsverity_init_workqueue();
|
|
fsverity_init_sysctl();
|
|
fsverity_init_signature();
|
|
fsverity_init_bpf();
|
|
return 0;
|
|
}
|
|
late_initcall(fsverity_init)
|