CVE-2024-45029

Published: September 12, 2024Last modified: September 12, 2024

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.

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References

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