CVE-2024-46896

Summary

In the Linux kernel, the following vulnerability has been resolved:

drm/amdgpu: don't access invalid sched

Since 2320c9e6a768 ("drm/sched: memset() 'job' in drm_sched_job_init()") accessing job->base.sched can produce unexpected results as the initialisation of (*job)->base.sched done in amdgpu_job_alloc is overwritten by the memset.

This commit fixes an issue when a CS would fail validation and would be rejected after job->num_ibs is incremented. In this case, amdgpu_ib_free(ring->adev, …) will be called, which would crash the machine because the ring value is bogus.

To fix this, pass a NULL pointer to amdgpu_ib_free(): we can do this because the device is actually not used in this function.

The next commit will remove the ring argument completely.

(cherry picked from commit 2ae520cb12831d264ceb97c61f72c59d33c0dbd7)

Affected Software

Weaknesses

ADP Enrichment

CVE Program Container

Additional References

• https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html

References

• https://git.kernel.org/stable/c/65501a4fd84ecdc0af863dbb37759242aab9f2dd
• https://git.kernel.org/stable/c/da6b2c626ae73c303378ce9eaf6e3eaf16c9925a
• https://git.kernel.org/stable/c/67291d601f2b032062b1b2f60ffef1b63e10094c
• https://git.kernel.org/stable/c/a93b1020eb9386d7da11608477121b10079c076a

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