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git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs.git
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Karl Mehltretter
073a30d75f
vc4_kms_load() calls drm_kms_helper_poll_init() but the driver provides
no matching drm_kms_helper_poll_fini(). The output poll work stays
scheduled after unbind and runs on the freed drm_device:
# modprobe vc4; rmmod vc4; sleep 10
BUG: KASAN: slab-use-after-free in delayed_work_timer_fn
BUG: KASAN: slab-use-after-free in drm_client_dev_hotplug [drm]
Workqueue: events output_poll_execute [drm_kms_helper]
Allocated by task 171: __devm_drm_dev_alloc
Freed by task 262 (rmmod): drm_dev_put / component_del
Use drmm_kms_helper_poll_init() so polling is finalized with the device,
as other drivers do.
Fixes: c8b75bca92 ("drm/vc4: Add KMS support for Raspberry Pi.")
Assisted-by: Claude:claude-fable-5
Signed-off-by: Karl Mehltretter <[email protected]>
Link: https://patch.msgid.link/[email protected]
Reviewed-by: Maíra Canal <[email protected]>
Signed-off-by: Maíra Canal <[email protected]>