diff options
| author | Li Chen <chenl311@chinatelecom.cn> | 2025-06-20 20:02:31 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-08-20 18:41:26 +0200 |
| commit | 4b7d511fd88e10c3a0bdff0b93659a3cff82e00e (patch) | |
| tree | d0e34f8c960dc59e764e067e827d1d82acf632a1 /include/linux | |
| parent | 3d846183dcc0a50447d21884b1b59f09fe13d197 (diff) | |
HID: rate-limit hid_warn to prevent log flooding
[ Upstream commit 4051ead99888f101be92c7ce90d2de09aac6fd1c ]
Syzkaller can create many uhid devices that trigger
repeated warnings like:
"hid-generic xxxx: unknown main item tag 0x0"
These messages can flood the system log, especially if a crash occurs
(e.g., with a slow UART console, leading to soft lockups). To mitigate
this, convert `hid_warn()` to use `dev_warn_ratelimited()`.
This helps reduce log noise and improves system stability under fuzzing
or faulty device scenarios.
Signed-off-by: Li Chen <chenl311@chinatelecom.cn>
Signed-off-by: Jiri Kosina <jkosina@suse.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/hid.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/hid.h b/include/linux/hid.h index 568a9d8c749b..7f260e0e2049 100644 --- a/include/linux/hid.h +++ b/include/linux/hid.h @@ -1239,6 +1239,8 @@ void hid_quirks_exit(__u16 bus); dev_notice(&(hid)->dev, fmt, ##__VA_ARGS__) #define hid_warn(hid, fmt, ...) \ dev_warn(&(hid)->dev, fmt, ##__VA_ARGS__) +#define hid_warn_ratelimited(hid, fmt, ...) \ + dev_warn_ratelimited(&(hid)->dev, fmt, ##__VA_ARGS__) #define hid_info(hid, fmt, ...) \ dev_info(&(hid)->dev, fmt, ##__VA_ARGS__) #define hid_dbg(hid, fmt, ...) \ |