Make sure that a request bio is not NULL before trying to restore the request start sector.
Reported-by: Yi Zhang <[email protected]> Fixes: 6f8fd758de63 ("block: Restore sector of flush requests") Signed-off-by: Damien Le Moal <[email protected]> --- block/blk-flush.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/block/blk-flush.c b/block/blk-flush.c index 2f58ae018464..c17cf8ed8113 100644 --- a/block/blk-flush.c +++ b/block/blk-flush.c @@ -130,7 +130,8 @@ static void blk_flush_restore_request(struct request *rq) * original @rq->bio. Restore it. */ rq->bio = rq->biotail; - rq->__sector = rq->bio->bi_iter.bi_sector; + if (rq->bio) + rq->__sector = rq->bio->bi_iter.bi_sector; /* make @rq a normal request */ rq->rq_flags &= ~RQF_FLUSH_SEQ; -- 2.44.0
