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kernel/panic: increase buffer size for verbose taint logging

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The verbose 'Tainted: ...' string in print_tainted_seq can total to 327
characters while the buffer defined in _print_tainted is 320 bytes. 
Increase its size to 350 characters to hold all flags, along with some
headroom.

[akpm@linux-foundation.org: fix spello, add comment]
Link: https://lkml.kernel.org/r/20260220151500.13585-1-rioo.tsukatsukii@gmail.com
Signed-off-by: Rio <rioo.tsukatsukii@gmail.com>
Cc: Joel Granados <joel.granados@kernel.org>
Cc: Petr Mladek <pmladek@suse.com>
Cc: Wang Jinchao <wangjinchao600@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Rio
2026-02-20 20:45:00 +05:30
committed by Andrew Morton
parent 3f80aa1a2a
commit a75d207916
1 changed files with 6 additions and 2 deletions
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8
kernel/panic.c
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@@ -801,6 +801,8 @@ EXPORT_SYMBOL(panic);
* Documentation/admin-guide/tainted-kernels.rst, including its
* small shell script that prints the TAINT_FLAGS_COUNT bits of
* /proc/sys/kernel/tainted.
*
* Also, update TAINT_BUF_MAX below.
*/
const struct taint_flag taint_flags[TAINT_FLAGS_COUNT] = {
TAINT_FLAG(PROPRIETARY_MODULE, 'P', 'G'),
@@ -854,10 +856,12 @@ static void print_tainted_seq(struct seq_buf *s, bool verbose)
}
}
/* 350 can accommodate all taint flags in verbose mode, with some headroom */
#define TAINT_BUF_MAX 350
static const char *_print_tainted(bool verbose)
{
/* FIXME: what should the size be? */
static char buf[sizeof(taint_flags)];
static char buf[TAINT_BUF_MAX];
struct seq_buf s;
BUILD_BUG_ON(ARRAY_SIZE(taint_flags) != TAINT_FLAGS_COUNT);