From: Simon Horman <horms@kernel.org>
To: Sagi Maimon <maimon.sagi@gmail.com>
Cc: jonathan.lemon@gmail.com, vadim.fedorenko@linux.dev,
richardcochran@gmail.com, andrew+netdev@lunn.ch,
davem@davemloft.net, edumazet@google.com, kuba@kernel.org,
pabeni@redhat.com, linux-kernel@vger.kernel.org,
netdev@vger.kernel.org
Subject: Re: [PATCH v5] ptp: ocp: Limit signal/freq counts in summary output functions
Date: Fri, 16 May 2025 10:08:37 +0100 [thread overview]
Message-ID: <20250516090837.GF1898636@horms.kernel.org> (raw)
In-Reply-To: <20250514073541.35817-1-maimon.sagi@gmail.com>
On Wed, May 14, 2025 at 10:35:41AM +0300, Sagi Maimon wrote:
> The debugfs summary output could access uninitialized elements in
> the freq_in[] and signal_out[] arrays, causing NULL pointer
> dereferences and triggering a kernel Oops (page_fault_oops).
> This patch adds u8 fields (nr_freq_in, nr_signal_out) to track the
> number of initialized elements, with a maximum of 4 per array.
> The summary output functions are updated to respect these limits,
> preventing out-of-bounds access and ensuring safe array handling.
>
> Signed-off-by: Sagi Maimon <maimon.sagi@gmail.com>
> ---
> Addressed comments from Vadim Fedorenko:
> - https://www.spinics.net/lists/kernel/msg5683022.html
> Addressed comments from Jakub Kicinski:
> - https://www.spinics.net/lists/netdev/msg1091131.html
> Changes since v4:
> - remove fix from signal/freq show/store routines.
Reviewed-by: Simon Horman <horms@kernel.org>
next prev parent reply other threads:[~2025-05-16 9:08 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-05-14 7:35 [PATCH v5] ptp: ocp: Limit signal/freq counts in summary output functions Sagi Maimon
2025-05-16 9:08 ` Simon Horman [this message]
2025-05-16 20:16 ` Vadim Fedorenko
2025-05-16 22:50 ` patchwork-bot+netdevbpf
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