Bartosz Golaszewski

A issue in the Linux kernel has been resolved, specifically in the qcom scm smc firmware. The problem was related to handling a missing SCM device. A commit was made to explicitly handle the case where qcom scm get tzmem pool() can return NULL, ensuring its users can properly manage this situation.

The issue is related to a NULL pointer dereference in the Linux kernel's gpio component. This occurs when removing debugfs entries while unbinding the driver, causing a NULL-pointer dereference on module exit. The problem arises because platform devices are unregistered after the global debugfs directory has been recursively removed. To fix this, the devices should be unregistered first. The vulnerability may allow an attacker to cause a denial of service.

A shift-out-of-bounds error was found in the Linux kernel, specifically in the gpio-wcd934x driver. The bit-mask for pins 0 to 4 is incorrectly set to BIT(n - 1) instead of BIT(0) to BIT(4). This issue was caught by the UBSAN check, which reported a shift-out-of-bounds error in the drivers/gpio/gpio-wcd934x.c file at line 34, column 14.