CVE-2024-45029 Information

Description

In the Linux kernel the following vulnerability has been resolved:

i2c: tegra: Do not mark ACPI devices as irq safe

On ACPI machines the tegra i2c module encounters an issue due to a mutex being called inside a spinlock. This leads to the following bug:

BUG: sleeping function called from invalid context at kernel/locking/mutex.c:585
...

Call trace:
__might_sleep
__mutex_lock_common
mutex_lock_nested
acpi_subsys_runtime_resume
rpm_resume
tegra_i2c_xfer

The problem arises because during __pm_runtime_resume() the spinlock &dev->power.lock is acquired before rpm_resume() is called. Later rpm_resume() invokes acpi_subsys_runtime_resume() which relies on mutexes triggering the error.

To address this issue devices on ACPI are now marked as not IRQ-safe considering the dependency of acpi_subsys_runtime_resume() on mutexes.

Reference

https://git.kernel.org/stable/c/a89aef1e6cc43fa019a58080ed05c839e6c77876 https://git.kernel.org/stable/c/6861faf4232e4b78878f2de1ed3ee324ddae2287 https://git.kernel.org/stable/c/2853e1376d8161b04c9ff18ba82b43f08a049905 https://git.kernel.org/stable/c/14d069d92951a3e150c0a81f2ca3b93e54da913b