Re: [PATCH v2] dmaengine: fsl-edma: tracing: no ptr dereference during log output
Vinod Koul <[email protected]>
| Newsgroups | org.kernel.vger.dmaengine,dev.linux.lists.imx,org.kernel.vger.linux-kernel,org.kernel.vger.linux-trace-kernel,org.kernel.vger.stable |
|---|---|
| Message-ID | <[email protected]> |
On Sat, 18 Jul 2026 14:58:48 +0200, Martin Kaiser wrote:
> The fsl edma events store a pointer to a struct fsl_edma_engine in the
> ringbuffer and dereference it when a log entry is printed. At this time,
> the pointer may no longer be valid.
>
> Event injection can be used to trigger a crash:
>
> $ cd /sys/kernel/tracing
> $ echo 'value = 0' > events/fsl_edma/edma_writeb/inject
> $ cat trace
>
> [...]
Applied, thanks!
[1/1] dmaengine: fsl-edma: tracing: no ptr dereference during log output
commit: 2ea04dca8e627f722caa7a2037cfbae0257f3501
Best regards,
--
~Vinod