Description
In the Linux kernel, the following vulnerability has been resolved: bus: fsl-mc: fix double-free on mc_dev The blamed commit tried to simplify how the deallocations are done but, in the process, introduced a double-free on the mc_dev variable. In case the MC device is a DPRC, a new mc_bus is allocated and the mc_dev variable is just a reference to one of its fields. In this circumstance, on the error path only the mc_bus should be freed. This commit introduces back the following checkpatch warning which is a false-positive. WARNING: kfree(NULL) is safe and this check is probably not required + if (mc_bus) + kfree(mc_bus);
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
a042fbed02904493ae6df26ec836045f5a7d3ce2 to < 12e4431e5078847791936820bd39df9e1ee26d2eaffecteda042fbed02904493ae6df26ec836045f5a7d3ce2 to < 3135e03a92f6b5259d0a7f25f728e9e7866ede3faffecteda042fbed02904493ae6df26ec836045f5a7d3ce2 to < 7002b954c4a8b9965ba0f139812ee4a6f71beac8affecteda042fbed02904493ae6df26ec836045f5a7d3ce2 to < b2057374f326303c86d8423415ab58656eebc695affecteda042fbed02904493ae6df26ec836045f5a7d3ce2 to < 4b23c46eb2d88924b93aca647bde9a4b9cf62cf9affecteda042fbed02904493ae6df26ec836045f5a7d3ce2 to < 1d5baab39e5b09a76870b345cdee7933871b881faffecteda042fbed02904493ae6df26ec836045f5a7d3ce2 to < 873d47114fd5e5a1cad2018843671537cc71ac84affecteda042fbed02904493ae6df26ec836045f5a7d3ce2 to < d694bf8a9acdbd061596f3e7549bc8cb70750a60affected
Linux Linux
Default version status: affected
4.13affected0 to < 4.13unaffected5.4.295 to ≤ 5.4.*unaffected5.10.239 to ≤ 5.10.*unaffected5.15.186 to ≤ 5.15.*unaffected6.1.142 to ≤ 6.1.*unaffected6.6.94 to ≤ 6.6.*unaffected6.12.34 to ≤ 6.12.*unaffected6.15.3 to ≤ 6.15.*unaffected6.16 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/12e4431e5078847791936820bd39df9e1ee26d2e ↗
- https://git.kernel.org/stable/c/3135e03a92f6b5259d0a7f25f728e9e7866ede3f ↗
- https://git.kernel.org/stable/c/7002b954c4a8b9965ba0f139812ee4a6f71beac8 ↗
- https://git.kernel.org/stable/c/b2057374f326303c86d8423415ab58656eebc695 ↗
- https://git.kernel.org/stable/c/4b23c46eb2d88924b93aca647bde9a4b9cf62cf9 ↗
- https://git.kernel.org/stable/c/1d5baab39e5b09a76870b345cdee7933871b881f ↗
- https://git.kernel.org/stable/c/873d47114fd5e5a1cad2018843671537cc71ac84 ↗
- https://git.kernel.org/stable/c/d694bf8a9acdbd061596f3e7549bc8cb70750a60 ↗
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html ↗
- https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html ↗