dm-integrity: fix NULL pointer dereference when the 'R' flag is used

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If the dm-integrity device has the SB_FLAG_DIRTY_BITMAP flag set and the
user activates the device in the 'R' mode, a crash in dm_integrity_resume
happens because the function attempts to read the journal containing the
bitmap.

This patch makes dm-integrity skip any writes to the device in
dm_integrity_resume if the device is activated in the 'R' mode.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Fixes: 468dfca38b ("dm integrity: add a bitmap mode")
Cc: stable@vger.kernel.org

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Mikulas Patocka 2026-09-02 16:36:26 +02:00

parent 2ccb8878c1

commit 7d4d4f3b66

1 changed files with 5 additions and 0 deletions

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drivers/md/dm-integrity.c

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