mmc: core: Cancel SDIO IRQ work before freeing host

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A host controller that uses sdio_signal_irq() schedules host->sdio_irq_work
from its interrupt handler.  That work is only cancelled on the suspend
path (mmc_sdio_suspend()), not on the remove/free path, so a worker armed
just before the controller freed its IRQ can run after
mmc_host_classdev_release() has freed the host and dereference it through
container_of().

Cancel host->sdio_irq_work in mmc_free_host(), like the existing
host->detect drain added by commit 1036f69e25 ("mmc: core: Cancel
delayed work before releasing host").

This issue was found by an in-house static analysis tool.

Fixes: 682696605c ("mmc: sdio: Add API to manage SDIO IRQs from a workqueue")
Cc: stable@vger.kernel.org
Assisted-by: Codex:gpt-5.6
Signed-off-by: Fan Wu <fanwu01@zju.edu.cn>
Signed-off-by: Ulf Hansson <ulfh@kernel.org>

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Fan Wu 2026-08-06 13:02:33 +00:00 • committed by Ulf Hansson

parent 90af7fde08

commit 6feadbecda

1 changed files with 1 additions and 0 deletions

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drivers/mmc/core/host.c

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