Bugzilla – Bug 1220654
VUL-0: CVE-2021-46994: kernel: can: mcp251x: fix resume from sleep before interface was brought up
Last modified: 2024-05-31 13:17:07 UTC
In the Linux kernel, the following vulnerability has been resolved: can: mcp251x: fix resume from sleep before interface was brought up Since 8ce8c0abcba3 the driver queues work via priv->restart_work when resuming after suspend, even when the interface was not previously enabled. This causes a null dereference error as the workqueue is only allocated and initialized in mcp251x_open(). To fix this we move the workqueue init to mcp251x_can_probe() as there is no reason to do it later and repeat it whenever mcp251x_open() is called. [mkl: fix error handling in mcp251x_stop()] References: http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-46994 https://www.cve.org/CVERecord?id=CVE-2021-46994 https://git.kernel.org/stable/c/03c427147b2d3e503af258711af4fc792b89b0af https://git.kernel.org/stable/c/6f8f1c27b577de15f69fefce3c502bb6300d825c https://git.kernel.org/stable/c/e1e10a390fd9479209c4d834d916ca5e6d5d396b https://git.kernel.org/stable/c/eecb4df8ec9f896b19ee05bfa632ac6c1dcd8f21
All affected branches already contain the fix. Closing.
All done, closing.