A potential data race in drivers/media/platform/s5p-mfc/
From: Pavel Andrianov <hidden>
Date: 2021-03-23 06:38:29
Also in:
linux-media, lkml
Hi, s5p_mfc_probe[1] registers an interrupt handler s5p_mfc_irq before compete initialization. For example, the interrupt handler operates with mfc_ops, which are set up in [2]. So, potentially, the interrupt handler may be executed in parallel with initialization. The question is if the device can produce the interrupts. Its registers are initialized in [3] and there are nothing like "enabling interrupts". So, likely, they are activated. And if interrupts can come, then this is a data race. Best regards, Pavel Andrianov Linux Verification Center, ISPRAS web:http://linuxtesting.org [1]https://elixir.bootlin.com/linux/v5.4.106/source/drivers/media/platform/s5p-mfc/s5p_mfc.c#L1299 [2]https://elixir.bootlin.com/linux/v5.4.106/source/drivers/media/platform/s5p-mfc/s5p_mfc_opr.c#L19 [3]https://elixir.bootlin.com/linux/v5.4.106/source/drivers/media/platform/s5p-mfc/s5p_mfc_opr_v6.c#L2229 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel