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linux/drivers/md/dm-cache-target.c
Ming-Hung Tsai 8c0ee19db8 dm cache: fix missing return in invalidate_committed's error path 
In passthrough mode, dm-cache defers write submission until after
metadata commit completes via the invalidate_committed() continuation.
On commit error, invalidate_committed() calls invalidate_complete() to
end the bio and free the migration struct, after which it should return
immediately.

The patch 4ca8b8bd95 ("dm cache: fix write hang in passthrough mode")
omitted this early return, causing execution to fall through into the
success path on error. This results in use-after-free on the migration
struct in the subsequent calls.

Fix by adding the missing return after the invalidate_complete() call.

Fixes: 4ca8b8bd95 ("dm cache: fix write hang in passthrough mode")
Reported-by: Dan Carpenter <error27@gmail.com>
Closes: https://lore.kernel.org/dm-devel/adjMq6T5RRjv_uxM@stanley.mountain/
Signed-off-by: Ming-Hung Tsai <mtsai@redhat.com>
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
2026-04-10 15:16:06 +02:00

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