Bug 2324316 (CVE-2024-50159)

Summary: CVE-2024-50159 kernel: firmware: arm_scmi: Fix the double free in scmi_debugfs_common_setup()
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: 2324401    
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Description OSIDB Bzimport 2024-11-07 10:01:24 UTC 
In the Linux kernel, the following vulnerability has been resolved:

firmware: arm_scmi: Fix the double free in scmi_debugfs_common_setup()

Clang static checker(scan-build) throws below warning：
  |  drivers/firmware/arm_scmi/driver.c:line 2915, column 2
  |        Attempt to free released memory.

When devm_add_action_or_reset() fails, scmi_debugfs_common_cleanup()
will run twice which causes double free of 'dbg->name'.

Remove the redundant scmi_debugfs_common_cleanup() to fix this problem.
Comment 1 Robb Gatica 2024-11-07 16:25:39 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024110747-CVE-2024-50159-3dec@gregkh/T