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.
Product status
4611ce22468895acd61fee9ac1da810d60617d9a (git) before 8e0681dd4eee029eb1d533d06993f7cb091efb73
4611ce22468895acd61fee9ac1da810d60617d9a (git) before 17afa98bccec4f52203508b3f49b5f948c6fd6ac
4611ce22468895acd61fee9ac1da810d60617d9a (git) before 7337adb20fcc0aebb50eaff2bc5a8dd9a7c6743d
4611ce22468895acd61fee9ac1da810d60617d9a (git) before 6cfa9e60c0f88fdec6368e081ab968411cc706b1
4611ce22468895acd61fee9ac1da810d60617d9a (git) before 34c3a47d20ae55b3600fed733bf96eafe9c500d5
5.8
Any version before 5.8
5.10.163 (semver)
5.15.86 (semver)
6.0.16 (semver)
6.1.2 (semver)
6.2 (original_commit_for_fix)
References
git.kernel.org/...c/8e0681dd4eee029eb1d533d06993f7cb091efb73
git.kernel.org/...c/17afa98bccec4f52203508b3f49b5f948c6fd6ac
git.kernel.org/...c/7337adb20fcc0aebb50eaff2bc5a8dd9a7c6743d
git.kernel.org/...c/6cfa9e60c0f88fdec6368e081ab968411cc706b1
git.kernel.org/...c/34c3a47d20ae55b3600fed733bf96eafe9c500d5
