linux-kernel - Re: [PATCH v3] HID: rate-limit hid

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <448r1561-9570-7816-2705-0nso4919r3op@xreary.bet>
Date: Fri, 20 Jun 2025 15:35:13 +0200 (CEST)
From: Jiri Kosina <jikos@...nel.org>
To: Li Chen <me@...ux.beauty>
cc: Benjamin Tissoires <bentiss@...nel.org>, linux-input@...r.kernel.org, 
    linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3] HID: rate-limit hid_warn to prevent log flooding

On Fri, 20 Jun 2025, Li Chen wrote:

> From: Li Chen <chenl311@...natelecom.cn>
> 
> 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@...natelecom.cn>
> ---
> Changelog:
> 
> v2: Introduce hid_warn_ratelimited to rate-limit the specified log.
> v3: also ratelimit "reserved main item tag ..."

Applied, thanks.

-- 
Jiri Kosina
SUSE Labs