IT

Tracker / CVE-2022-49313

CVE-2022-49313

Medium 5.5

In the Linux kernel, the following vulnerability has been resolved: drivers: usb: host: Fix deadlock in oxu_bus_suspend() There is a deadlock in oxu_bus_suspend(), which is shown below: (Thread 1) | (Thread 2) | timer_action() oxu_bus_suspend() | mod_timer() spin_lock_irq() //(1) | (wait a time) ... | oxu_watchdog() del_timer_sync() | spin_lock_irq() //(2) (wait timer to stop) | ... We hold oxu->lock in position (1) of thread 1, and use del_timer_sync() to wait timer to stop, but timer handler also need oxu->lock in position (2) of thread 2. As a result, oxu_bus_suspend() will block forever. This patch extracts del_timer_sync() from the protection of spin_lock_irq(), which could let timer handler to obtain the needed lock.

Affected products and versions

linux linux_kernel · … → 4.9.318
linux linux_kernel · 4.10 → 4.14.283
linux linux_kernel · 4.15 → 4.19.247
linux linux_kernel · 4.20 → 5.4.198
linux linux_kernel · 5.11 → 5.15.47
linux linux_kernel · 5.16 → 5.17.15
linux linux_kernel · 5.18 → 5.18.4
linux linux_kernel · 5.5 → 5.10.122

Analysis

This page is not indexable yet.Until it carries original analysis — what it actually exposes, how to check in two minutes whether a system was touched, what to do if it was — the page stays noindex. The database decides that, not the template.

References