Bug 2313047 (CVE-2024-46716)

Summary: CVE-2024-46716 kernel: dmaengine: altera-msgdma: properly free descriptor in msgdma_free_descriptor
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Priority: medium    
Version: unspecifiedCC: dfreiber, drow, jburrell, vkumar
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Hardware: All   
OS: Linux   
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Bug Depends On: 2313077    
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Description OSIDB Bzimport 2024-09-18 07:21:04 UTC 
In the Linux kernel, the following vulnerability has been resolved:

dmaengine: altera-msgdma: properly free descriptor in msgdma_free_descriptor

Remove list_del call in msgdma_chan_desc_cleanup, this should be the role
of msgdma_free_descriptor. In consequence replace list_add_tail with
list_move_tail in msgdma_free_descriptor.

This fixes the path:
   msgdma_free_chan_resources -> msgdma_free_descriptors ->
   msgdma_free_desc_list -> msgdma_free_descriptor

which does not correctly free the descriptors as first nodes were not
removed from the list.
Comment 1 Michal Findra 2024-09-18 08:06:51 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024091833-CVE-2024-46716-f63f@gregkh/T