Description
In the Linux kernel, the following vulnerability has been resolved:
drivers: staging: rtl8192e: Fix deadlock in rtllib_beacons_stop()
There is a deadlock in rtllib_beacons_stop(), which is shown below:
(Thread 1) | (Thread 2) | rtllib_send_beacon() rtllib_beacons_stop() | mod_timer() spin_lock_irqsave() //(1) | (wait a time) ... | rtllib_send_beacon_cb() del_timer_sync() | spin_lock_irqsave() //(2) (wait timer to stop) | ...
We hold ieee->beacon_lock in position (1) of thread 1 and use del_timer_sync() to wait timer to stop, but timer handler also need ieee->beacon_lock in position (2) of thread 2. As a result, rtllib_beacons_stop() will block forever.
This patch extracts del_timer_sync() from the protection of spin_lock_irqsave(), which could let timer handler to obtain the needed lock.
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 | >= 94a799425eee8225a1e3fbe5f473d2ef04002577, < 4681129fda9e8555392eaaadb239ec6a6e2b3e12; >= 94a799425eee8225a1e3fbe5f473d2ef04002577, < 381045dc64d23a2229c47c5524c06bfc33d34446; >= 94a799425eee8225a1e3fbe5f473d2ef04002577, < 08bacf871c019163ccd1389d0bc957a43324967a; >= 94a799425eee8225a1e3fbe5f473d2ef04002577, < 64b05fa212c7e4d057676e8b7e7120c6eb2f615b; >= 94a799425eee8225a1e3fbe5f473d2ef04002577, < 0f69d7d5e918aa43423d86bd17ddb11b1b5e8ada; >= 94a799425eee8225a1e3fbe5f473d2ef04002577, < fef451f0fbbe85dbd2962b18379d02e2965610db; >= 94a799425eee8225a1e3fbe5f473d2ef04002577, < 46c861009bf437a18417df24cea0d181741b7d72; >= 94a799425eee8225a1e3fbe5f473d2ef04002577, < ffd4c4d5293e4985092ea45ba21cad9326e2e434; >= 94a799425eee8225a1e3fbe5f473d2ef04002577, < 9b6bdbd9337de3917945847bde262a34a87a6303 |
| Linux | Linux | 3.2 |
References
- https://git.kernel.org/stable/c/08bacf871c019163ccd1389d0bc957a43324967aPatch
- https://git.kernel.org/stable/c/0f69d7d5e918aa43423d86bd17ddb11b1b5e8adaPatch
- https://git.kernel.org/stable/c/381045dc64d23a2229c47c5524c06bfc33d34446Patch
- https://git.kernel.org/stable/c/4681129fda9e8555392eaaadb239ec6a6e2b3e12Patch
- https://git.kernel.org/stable/c/46c861009bf437a18417df24cea0d181741b7d72Patch
- https://git.kernel.org/stable/c/64b05fa212c7e4d057676e8b7e7120c6eb2f615bPatch
- https://git.kernel.org/stable/c/9b6bdbd9337de3917945847bde262a34a87a6303Patch
- https://git.kernel.org/stable/c/fef451f0fbbe85dbd2962b18379d02e2965610dbPatch
- https://git.kernel.org/stable/c/ffd4c4d5293e4985092ea45ba21cad9326e2e434Patch
Timeline
- Published
- Feb 26, 2025
- Last modified
- Jun 17, 2026
- NVD status
- Modified