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authorChen Yufeng <chenyufeng@iie.ac.cn>2025-09-11 23:08:20 +0800
committerMarc Kleine-Budde <mkl@pengutronix.de>2025-09-19 18:59:15 +0200
commit6b696808472197b77b888f50bc789a3bae077743 (patch)
tree8828245f6199c78b12a5e8413d1fdc9a28abf3e1 /rust/helpers/signal.c
parentcbf658dd09419f1ef9de11b9604e950bdd5c170b (diff)
can: hi311x: fix null pointer dereference when resuming from sleep before interface was enabled
This issue is similar to the vulnerability in the `mcp251x` driver, which was fixed in commit 03c427147b2d ("can: mcp251x: fix resume from sleep before interface was brought up"). In the `hi311x` driver, when the device resumes from sleep, the driver schedules `priv->restart_work`. However, if the network interface was not previously enabled, the `priv->wq` (workqueue) is not allocated and initialized, leading to a null pointer dereference. To fix this, we move the allocation and initialization of the workqueue from the `hi3110_open` function to the `hi3110_can_probe` function. This ensures that the workqueue is properly initialized before it is used during device resume. And added logic to destroy the workqueue in the error handling paths of `hi3110_can_probe` and in the `hi3110_can_remove` function to prevent resource leaks. Signed-off-by: Chen Yufeng <chenyufeng@iie.ac.cn> Link: https://patch.msgid.link/20250911150820.250-1-chenyufeng@iie.ac.cn Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Diffstat (limited to 'rust/helpers/signal.c')
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