Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: mm/kmemleak: avoid deadlock by moving pr_warn() outside kmemleak_lock When netpoll is enabled, calling pr_warn_once() while holding kmemleak_lock in mem_pool_alloc() can cause a deadlock due to lock inversion with the netconsole subsystem. This occurs because pr_warn_once() may trigger netpoll, which eventually leads to __alloc_skb() and back into kmemleak code, attempting to reacquire kmemleak_lock. This is the path for the deadlock. mem_pool_alloc() -> raw_spin_lock_irqsave(&kmemleak_lock, flags); -> pr_warn_once() -> netconsole subsystem -> netpoll -> __alloc_skb -> __create_object -> raw_spin_lock_irqsave(&kmemleak_lock, flags); Fix this by setting a flag and issuing the pr_warn_once() after kmemleak_lock is released.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected c5665868183fec689dbab9fb8505188b2c4f0757 before c7b6ea0ede687e7460e593c5ea478f50aa41682a; affected c5665868183fec689dbab9fb8505188b2c4f0757 before 4b0151e1d468eb2667c37b7af99b3c075072d334; affected c5665868183fec689dbab9fb8505188b2c4f0757 before f249d32bb54876b4b6c3ae071af8ddca77af390b; affected c5665868183fec689dbab9fb8505188b2c4f0757 before 62879faa8efe8d8a9c7bf7606ee9c068012d7dac; affected c5665868183fec689dbab9fb8505188b2c4f0757 before 1da95d3d4b7b1d380ebd87b71a61e7e6aed3265d; affected c5665868183fec689dbab9fb8505188b2c4f0757 before a0854de00ce2ee27edf39037e7836ad580eb3350; affected c5665868183fec689dbab9fb8505188b2c4f0757 before 08f70be5e406ce47c822f2dd11c1170ca259605b; affected c5665868183fec689dbab9fb8505188b2c4f0757 before a181b228b37a6a5625dad2bb4265bb7abb673e9f; affected c5665868183fec689dbab9fb8505188b2c4f0757 before 47b0f6d8f0d2be4d311a49e13d2fd5f152f492b2 |
| Linux / Linux | affected 5.4; unaffected 0 before 5.4; unaffected 5.4.297 through 5.4.*; unaffected 5.10.241 through 5.10.*; unaffected 5.15.190 through 5.15.*; unaffected 6.1.149 through 6.1.*; unaffected 6.6.103 through 6.6.*; unaffected 6.12.43 through 6.12.*; unaffected 6.15.11 through 6.15.*; unaffected 6.16.2 through 6.16.*; unaffected 6.17 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/c7b6ea0ede687e7460e593c5ea478f50aa41682a
- https://git.kernel.org/stable/c/4b0151e1d468eb2667c37b7af99b3c075072d334
- https://git.kernel.org/stable/c/f249d32bb54876b4b6c3ae071af8ddca77af390b
- https://git.kernel.org/stable/c/62879faa8efe8d8a9c7bf7606ee9c068012d7dac
- https://git.kernel.org/stable/c/1da95d3d4b7b1d380ebd87b71a61e7e6aed3265d
- https://git.kernel.org/stable/c/a0854de00ce2ee27edf39037e7836ad580eb3350
- https://git.kernel.org/stable/c/08f70be5e406ce47c822f2dd11c1170ca259605b
- https://git.kernel.org/stable/c/a181b228b37a6a5625dad2bb4265bb7abb673e9f
- https://git.kernel.org/stable/c/47b0f6d8f0d2be4d311a49e13d2fd5f152f492b2
ADP enrichment
No English description supplied.
No English description supplied.