CVE-2023-52567 Information

Mar 03, 2024 cve

Description

In the Linux kernel the following vulnerability has been resolved:

serial: 8250_port: Check IRQ data before use

In case the leaf driver wants to use IRQ polling (irq = 0) and IIR register shows that an interrupt happened in the 8250 hardware the IRQ data can be NULL. In such a case we need to skip the wake event as we came to this path from the timer interrupt and quite likely system is already awake.

Without this fix we have got an Oops:

serial8250: ttyS0 at I/O 0x3f8 (irq = 0 base_baud = 115200) is a 16550A
...
BUG: kernel NULL pointer dereference address: 0000000000000010
RIP: 0010:serial8250_handle_irq+0x7c/0x240
Call Trace:
 ? serial8250_handle_irq+0x7c/0x240
 ? __pfx_serial8250_timeout+0x10/0x10

Reference

https://git.kernel.org/stable/c/ee5732caaffba3a37e753fdb89b4958db9a61847 https://git.kernel.org/stable/c/c334650150c29234b0923476f51573ae1b2f252a https://git.kernel.org/stable/c/bf3c728e3692cc6d998874f0f27d433117348742 https://git.kernel.org/stable/c/e14afa4450cb7e4cf93e993a765801203d41d014 https://git.kernel.org/stable/c/2b837f13a818f96304736453ac53b66a70aaa4f2 https://git.kernel.org/stable/c/e14f68a48fd445a083ac0750fafcb064df5f18f7 https://git.kernel.org/stable/c/3345cc5f02f1fb4c4dcb114706f2210d879ab933 https://git.kernel.org/stable/c/cce7fc8b29961b64fadb1ce398dc5ff32a79643b

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