Description
In the Linux kernel, the following vulnerability has been resolved:
drivers: tty: serial: Fix deadlock in sa1100_set_termios()
There is a deadlock in sa1100_set_termios(), which is shown below:
(Thread 1) | (Thread 2) | sa1100_enable_ms() sa1100_set_termios() | mod_timer() spin_lock_irqsave() //(1) | (wait a time) ... | sa1100_timeout() del_timer_sync() | spin_lock_irqsave() //(2) (wait timer to stop) | ...
We hold sport->port.lock in position (1) of thread 1 and use del_timer_sync() to wait timer to stop, but timer handler also need sport->port.lock in position (2) of thread 2. As a result, sa1100_set_termios() will block forever.
This patch moves del_timer_sync() before spin_lock_irqsave() in order to prevent the deadlock.
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 0976808d0d171ec837d4bd3e9f4ad4a00ab703b8; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 85e20f8bd31a46d8c60103d0274a8ebe8f47f2b2; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 920f0ae7a129ffee98a106e3bbdfd61a2a59e939; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 09a5958a2452ad22d0cb638711ef34ea1863a829; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 6e2273eefab54a521d9c59efb6e1114e742bdf41; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 2cbfc38df580bff5b2fe19f21c1a7520efcc4b3b; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 553213432ef0c295becdc08c0207d2094468f673; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 34d91e555e5582cffdbcbb75517bc9217866823e; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 62b2caef400c1738b6d22f636c628d9f85cd4c4c |
| Linux | Linux | 2.6.12 |
References
- https://git.kernel.org/stable/c/0976808d0d171ec837d4bd3e9f4ad4a00ab703b8Patch
- https://git.kernel.org/stable/c/09a5958a2452ad22d0cb638711ef34ea1863a829Patch
- https://git.kernel.org/stable/c/2cbfc38df580bff5b2fe19f21c1a7520efcc4b3bPatch
- https://git.kernel.org/stable/c/34d91e555e5582cffdbcbb75517bc9217866823ePatch
- https://git.kernel.org/stable/c/553213432ef0c295becdc08c0207d2094468f673Patch
- https://git.kernel.org/stable/c/62b2caef400c1738b6d22f636c628d9f85cd4c4cPatch
- https://git.kernel.org/stable/c/6e2273eefab54a521d9c59efb6e1114e742bdf41Patch
- https://git.kernel.org/stable/c/85e20f8bd31a46d8c60103d0274a8ebe8f47f2b2Patch
- https://git.kernel.org/stable/c/920f0ae7a129ffee98a106e3bbdfd61a2a59e939Patch
Timeline
- Published
- Feb 26, 2025
- Last modified
- Jun 17, 2026
- NVD status
- Modified