From 5d8c71f9e5fbdd95650be00294d238e27a363b5c Mon Sep 17 00:00:00 2001 From: Adam Kwolek Date: Fri, 9 Dec 2011 14:26:11 +1100 Subject: [PATCH] md: raid5 crash during degradation NULL pointer access causes crash in raid5 module. Signed-off-by: Adam Kwolek Signed-off-by: NeilBrown --- drivers/md/raid5.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c index b0dec01028f..31670f8d6b6 100644 --- a/drivers/md/raid5.c +++ b/drivers/md/raid5.c @@ -3070,7 +3070,7 @@ static void analyse_stripe(struct stripe_head *sh, struct stripe_head_state *s) if (sh->sector + STRIPE_SECTORS <= rdev->recovery_offset) set_bit(R5_Insync, &dev->flags); } - if (test_bit(R5_WriteError, &dev->flags)) { + if (rdev && test_bit(R5_WriteError, &dev->flags)) { clear_bit(R5_Insync, &dev->flags); if (!test_bit(Faulty, &rdev->flags)) { s->handle_bad_blocks = 1; @@ -3078,7 +3078,7 @@ static void analyse_stripe(struct stripe_head *sh, struct stripe_head_state *s) } else clear_bit(R5_WriteError, &dev->flags); } - if (test_bit(R5_MadeGood, &dev->flags)) { + if (rdev && test_bit(R5_MadeGood, &dev->flags)) { if (!test_bit(Faulty, &rdev->flags)) { s->handle_bad_blocks = 1; atomic_inc(&rdev->nr_pending); -- 2.39.5