CVE-2024-56532

In the Linux kernel, the following vulnerability has been resolved: ALSA: us122l: Use snd_card_free_when_closed() at disconnection The USB disconnect callback is supposed to be short and not too-long waiting. OTOH, the current code uses snd_card_free() at disconnection, but this waits for the close of all used fds, hence it can take long. It eventually blocks the upper layer USB ioctls, which may trigger a soft lockup. An easy workaround is to replace snd_card_free() with snd_card_free_when_closed(). This variant returns immediately while the release of resources is done asynchronously by the card device release at the last close. The loop of us122l->mmap_count check is dropped as well. The check is useless for the asynchronous operation with *_when_closed().

• linux linux kernel (>= 2.6.28 < 4.19.325) • linux linux kernel (>= 4.20 < 5.4.287) • linux linux kernel (>= 5.5 < 5.10.231) • linux linux kernel (>= 5.11 < 5.15.174) • linux linux kernel (>= 5.16 < 6.1.120) • linux linux kernel (>= 6.2 < 6.6.64) • linux linux kernel (>= 6.7 < 6.11.11) • linux linux kernel (>= 6.12 < 6.12.2)