Vulnerability CVE-2024-44954
Published: 2024-09-04

Description:
In the Linux kernel, the following vulnerability has been resolved:

ALSA: line6: Fix racy access to midibuf

There can be concurrent accesses to line6 midibuf from both the URB
completion callback and the rawmidi API access. This could be a cause
of KMSAN warning triggered by syzkaller below (so put as reported-by
here).

This patch protects the midibuf call of the former code path with a
spinlock for avoiding the possible races.

 References:
https://git.kernel.org/stable/c/643293b68fbb6c03f5e907736498da17d43f0d81
https://git.kernel.org/stable/c/40f3d5cb0e0cbf7fa697913a27d5d361373bdcf5
https://git.kernel.org/stable/c/e7e7d2b180d8f297cea6db43ea72402fd33e1a29
https://git.kernel.org/stable/c/a54da4b787dcac60b598da69c9c0072812b8282d
https://git.kernel.org/stable/c/c80f454a805443c274394b1db0d1ebf477abd94e
https://git.kernel.org/stable/c/535df7f896a568a8a1564114eaea49d002cb1747
https://git.kernel.org/stable/c/51d87f11dd199bbc6a85982b088ff27bde53b48a
https://git.kernel.org/stable/c/15b7a03205b31bc5623378c190d22b7ff60026f1
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