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Kunihiko HayashiandGreg Kroah-Hartman
f4bb0a91f7
commitf3ad1c87d8upstream. 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. Reported-by: Sangyun Kim <sangyun.kim@snu.ac.kr> Reported-by: Kyungwook Boo <bookyungwook@gmail.com> Fixes:5ba155a4d4("spi: add SPI controller driver for UniPhier SoC") Cc: stable@vger.kernel.org Cc: Masami Hiramatsu <mhiramat@kernel.org> Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com> Reviewed-by: Masami Hiramatsu (Google) <mhiramat@kernel.org> Link: https://patch.msgid.link/20260616011223.201357-1-hayashi.kunihiko@socionext.com Signed-off-by: Mark Brown <broonie@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>