Bug 2334571 (CVE-2024-56660)

Summary: CVE-2024-56660 kernel: net/mlx5: DR, prevent potential error pointer dereference
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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Description OSIDB Bzimport 2024-12-27 16:04:18 UTC 
In the Linux kernel, the following vulnerability has been resolved:

net/mlx5: DR, prevent potential error pointer dereference

The dr_domain_add_vport_cap() function generally returns NULL on error
but sometimes we want it to return ERR_PTR(-EBUSY) so the caller can
retry.  The problem here is that "ret" can be either -EBUSY or -ENOMEM
and if it's and -ENOMEM then the error pointer is propogated back and
eventually dereferenced in dr_ste_v0_build_src_gvmi_qpn_tag().
Comment 1 Avinash Hanwate 2024-12-28 01:21:26 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024122751-CVE-2024-56660-fb9d@gregkh/T