Bug 2322315 (CVE-2024-50071)

Summary: CVE-2024-50071 kernel: pinctrl: nuvoton: fix a double free in ma35_pinctrl_dt_node_to_map_func()
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: 2322354    
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Description OSIDB Bzimport 2024-10-29 01:01:58 UTC 
In the Linux kernel, the following vulnerability has been resolved:

pinctrl: nuvoton: fix a double free in ma35_pinctrl_dt_node_to_map_func()

'new_map' is allocated using devm_* which takes care of freeing the
allocated data on device removal, call to

	.dt_free_map = pinconf_generic_dt_free_map

double frees the map as pinconf_generic_dt_free_map() calls
pinctrl_utils_free_map().

Fix this by using kcalloc() instead of auto-managed devm_kcalloc().
Comment 1 Michal Findra 2024-10-29 07:31:24 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024102934-CVE-2024-50071-6dd6@gregkh/T