[PATCH 1/3] firmware: arm_scmi: imx: Track copied syslog words

[Peng Fan]

On Wed, Oct 28, 2026 at 01:05:00PM +0000, Sudeep Holla wrote:
>The MISC syslog iterator records the number of returned words plus
>firmware-reported remaining words in the caller's size output.
>
>The debugfs consumer uses that value to dump its fixed-size buffer. A
>malformed or inconsistent response can therefore make it read beyond
>the copied data and allocation.
>
>Return the accumulated number of words copied into the caller's buffer
>instead. The generic iterator bounds this count to the initial buffer
>capacity before processing each response.
>
>Reported-by: Sashiko <sashiko-bot at kernel.org>
>Closes: https://sashiko.dev/#/bug/linux-c3c9437c-ba1a-4db6-837f-cb0950d89018

This should be: https://sashiko.dev/#/bug/linux-67e325a9-473e-450a-a2a0-bf4c0c720624

>Fixes: 4fa62e80c7db ("firmware: arm_scmi: imx: Support getting syslog of MISC protocol")
>Signed-off-by: Sudeep Holla <sudeep.holla at kernel.org>

Reviewed-by: Peng Fan <peng.fan at nxp.com>