CVE-2024-56651: can: hi311x: hi3110_can_ist(): fix potential use-after-free

First published: Fri Dec 27 2024(Updated: )

In the Linux kernel, the following vulnerability has been resolved: can: hi311x: hi3110_can_ist(): fix potential use-after-free The commit a22bd630cfff ("can: hi311x: do not report txerr and rxerr during bus-off") removed the reporting of rxerr and txerr even in case of correct operation (i. e. not bus-off). The error count information added to the CAN frame after netif_rx() is a potential use after free, since there is no guarantee that the skb is in the same state. It might be freed or reused. Fix the issue by postponing the netif_rx() call in case of txerr and rxerr reporting.

Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67

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