Description
In the Linux kernel, the following vulnerability has been resolved: ALSA: pcm: Fix potential data race at PCM memory allocation helpers The PCM memory allocation helpers have a sanity check against too many buffer allocations. However, the check is performed without a proper lock and the allocation isn't serialized; this allows user to allocate more memories than predefined max size. Practically seen, this isn't really a big problem, as it's more or less some "soft limit" as a sanity check, and it's not possible to allocate unlimitedly. But it's still better to address this for more consistent behavior. The patch covers the size check in do_alloc_pages() with the card->memory_mutex, and increases the allocated size there for preventing the further overflow. When the actual allocation fails, the size is decreased accordingly.
Product status
95b30a4312545f2dde9db12bf6a425f35d5a0d77 (git) before 7e1d1456c8db9949459c5a24e8845cfe92430b0f
d4cfb30fce03093ad944e0b44bd8f40bdad5330e (git) before 7e11c58b2620a22c67a5ae28d64ce383890ee9f4
d4cfb30fce03093ad944e0b44bd8f40bdad5330e (git) before a0ab49e7a758b488b2090171a75d50735c0876f6
d4cfb30fce03093ad944e0b44bd8f40bdad5330e (git) before 3eb4e47a94e3f76521d7d344696db61e6a9619c7
d4cfb30fce03093ad944e0b44bd8f40bdad5330e (git) before 773ccad902f67583a58b5650a2f8d8daf2e76fac
d4cfb30fce03093ad944e0b44bd8f40bdad5330e (git) before bd55842ed998a622ba6611fe59b3358c9f76773d
5.6
Any version before 5.6
5.10.193 (semver)
5.15.129 (semver)
6.1.39 (semver)
6.4.4 (semver)
6.5 (original_commit_for_fix)
References
git.kernel.org/...c/7e1d1456c8db9949459c5a24e8845cfe92430b0f
git.kernel.org/...c/7e11c58b2620a22c67a5ae28d64ce383890ee9f4
git.kernel.org/...c/a0ab49e7a758b488b2090171a75d50735c0876f6
git.kernel.org/...c/3eb4e47a94e3f76521d7d344696db61e6a9619c7
git.kernel.org/...c/773ccad902f67583a58b5650a2f8d8daf2e76fac
git.kernel.org/...c/bd55842ed998a622ba6611fe59b3358c9f76773d