In the Linux kernel, the following vulnerability has been resolved:
spi: uniphier: Fix completion initialization order before devm_request_irq()
The driver calls devm_request_irq() before initializing the completion used by the interrupt handler. Because the interrupt may occur immediately after devm_request_irq(), the handler may execute before init_completion().
This may result in calling complete() on an uninitialized completion, causing undefined behavior. This has been observed with KASAN.
Fix this by initializing the completion before registering the IRQ.
References
- https://git.kernel.org/stable/c/077a7bc1c32d3da9670c5e282ea3e5ac8a94be59
- https://git.kernel.org/stable/c/49f6705d80b5e6175d8435d9c72b66bd516a8e89
- https://git.kernel.org/stable/c/82a5746c4c9e94f6f816ec7edea6ddc24417c6a5
- https://git.kernel.org/stable/c/8b5798ce0007874c14611b8ee4ce6c749855260e
- https://git.kernel.org/stable/c/b9fcf0db433d79648ace74bc2b8b88f91e306304
- https://git.kernel.org/stable/c/d44b828eb551bd59ba9f22457825cc3db3a39fc1
- https://git.kernel.org/stable/c/f3ad1c87d8201e54b66bd6072442f0b5d5a308ee
- https://git.kernel.org/stable/c/f4bb0a91f7badd6d15ac8d783a1169d9e1e95c17