Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: ALSA: timer: Don't take register_mutex with copy_from/to_user() The infamous mmap_lock taken in copy_from/to_user() can be often problematic when it's called inside another mutex, as they might lead to deadlocks. In the case of ALSA timer code, the bad pattern is with guard(mutex)(®ister_mutex) that covers copy_from/to_user() -- which was mistakenly introduced at converting to guard(), and it had been carefully worked around in the past. This patch fixes those pieces simply by moving copy_from/to_user() out of the register mutex lock again.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 3923de04c81733b30b8ed667569632272fdfed9a before 15291b561d8cc835a2eea76b394070cf8e072771; affected 3923de04c81733b30b8ed667569632272fdfed9a before 296f7a9e15aab276db11206cbc1e2ae1215d7862; affected 3923de04c81733b30b8ed667569632272fdfed9a before b074f47e55df93832bbbca1b524c501e6fea1c0d; affected 3923de04c81733b30b8ed667569632272fdfed9a before 3424c8f53bc63c87712a7fc22dc13d0cc85fb0d6 |
| Linux / Linux | affected 6.9; unaffected 0 before 6.9; unaffected 6.12.23 through 6.12.*; unaffected 6.13.11 through 6.13.*; unaffected 6.14.2 through 6.14.*; unaffected 6.15 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/15291b561d8cc835a2eea76b394070cf8e072771
- https://git.kernel.org/stable/c/296f7a9e15aab276db11206cbc1e2ae1215d7862
- https://git.kernel.org/stable/c/b074f47e55df93832bbbca1b524c501e6fea1c0d
- https://git.kernel.org/stable/c/3424c8f53bc63c87712a7fc22dc13d0cc85fb0d6
ADP enrichment
No English description supplied.
No references supplied.