Description
In the Linux kernel, the following vulnerability has been resolved: can: mcp251x: fix deadlock if an interrupt occurs during mcp251x_open The mcp251x_hw_wake() function is called with the mpc_lock mutex held and disables the interrupt handler so that no interrupts can be processed while waking the device. If an interrupt has already occurred then waiting for the interrupt handler to complete will deadlock because it will be trying to acquire the same mutex. CPU0 CPU1 ---- ---- mcp251x_open() mutex_lock(&priv->mcp_lock) request_threaded_irq() <interrupt> mcp251x_can_ist() mutex_lock(&priv->mcp_lock) mcp251x_hw_wake() disable_irq() <-- deadlock Use disable_irq_nosync() instead because the interrupt handler does everything while holding the mutex so it doesn't matter if it's still running.
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
8ce8c0abcba314e1fe954a1840f6568bf5aef2ef to < 3a49b6b1caf5cefc05264d29079d52c99cb188e0affected8ce8c0abcba314e1fe954a1840f6568bf5aef2ef to < 513c8fc189b52f7922e36bdca58997482b198f0eaffected8ce8c0abcba314e1fe954a1840f6568bf5aef2ef to < f7ab9e14b23a3eac6714bdc4dba244d8aa1ef646affected8ce8c0abcba314e1fe954a1840f6568bf5aef2ef to < 8fecde9c3f9a4b97b68bb97c9f47e5b662586ba7affected8ce8c0abcba314e1fe954a1840f6568bf5aef2ef to < e554113a1cd2a9cfc6c7af7bdea2141c5757e188affected8ce8c0abcba314e1fe954a1840f6568bf5aef2ef to < 7dd9c26bd6cf679bcfdef01a8659791aa6487a29affected
Linux Linux
Default version status: affected
5.5affected0 to < 5.5unaffected5.10.226 to ≤ 5.10.*unaffected5.15.167 to ≤ 5.15.*unaffected6.1.110 to ≤ 6.1.*unaffected6.6.51 to ≤ 6.6.*unaffected6.10.10 to ≤ 6.10.*unaffected6.11 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/3a49b6b1caf5cefc05264d29079d52c99cb188e0 ↗
- https://git.kernel.org/stable/c/513c8fc189b52f7922e36bdca58997482b198f0e ↗
- https://git.kernel.org/stable/c/f7ab9e14b23a3eac6714bdc4dba244d8aa1ef646 ↗
- https://git.kernel.org/stable/c/8fecde9c3f9a4b97b68bb97c9f47e5b662586ba7 ↗
- https://git.kernel.org/stable/c/e554113a1cd2a9cfc6c7af7bdea2141c5757e188 ↗
- https://git.kernel.org/stable/c/7dd9c26bd6cf679bcfdef01a8659791aa6487a29 ↗
- https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html ↗
- https://lists.debian.org/debian-lts-announce/2024/10/msg00003.html ↗