Description
In the Linux kernel, the following vulnerability has been resolved: padata: Always leave BHs disabled when running ->parallel() A deadlock can happen when an overloaded system runs ->parallel() in the context of the current task: padata_do_parallel ->parallel() pcrypt_aead_enc/dec padata_do_serial spin_lock(&reorder->lock) // BHs still enabled <interrupt> ... __do_softirq ... padata_do_serial spin_lock(&reorder->lock) It's a bug for BHs to be on in _do_serial as Steffen points out, so ensure they're off in the "current task" case like they are in padata_parallel_worker to avoid this situation.
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
4611ce22468895acd61fee9ac1da810d60617d9a to < 8e0681dd4eee029eb1d533d06993f7cb091efb73affected4611ce22468895acd61fee9ac1da810d60617d9a to < 17afa98bccec4f52203508b3f49b5f948c6fd6acaffected4611ce22468895acd61fee9ac1da810d60617d9a to < 7337adb20fcc0aebb50eaff2bc5a8dd9a7c6743daffected4611ce22468895acd61fee9ac1da810d60617d9a to < 6cfa9e60c0f88fdec6368e081ab968411cc706b1affected4611ce22468895acd61fee9ac1da810d60617d9a to < 34c3a47d20ae55b3600fed733bf96eafe9c500d5affected
Linux Linux
Default version status: affected
5.8affected0 to < 5.8unaffected5.10.163 to ≤ 5.10.*unaffected5.15.86 to ≤ 5.15.*unaffected6.0.16 to ≤ 6.0.*unaffected6.1.2 to ≤ 6.1.*unaffected6.2 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/8e0681dd4eee029eb1d533d06993f7cb091efb73 ↗
- https://git.kernel.org/stable/c/17afa98bccec4f52203508b3f49b5f948c6fd6ac ↗
- https://git.kernel.org/stable/c/7337adb20fcc0aebb50eaff2bc5a8dd9a7c6743d ↗
- https://git.kernel.org/stable/c/6cfa9e60c0f88fdec6368e081ab968411cc706b1 ↗
- https://git.kernel.org/stable/c/34c3a47d20ae55b3600fed733bf96eafe9c500d5 ↗