In function add_stripe_bio:
>> .....
>> bip = &sh->dev[dd_idx].toread;
>> ......
>>spin_unlock_irq(&sh->stripe_lock);
>> pr_debug("added bi b#%llu to stripe s#%llu, disk %d.\n",
>> (unsigned long long)(*bip)->bi_sector,
>> (unsigned long long)sh->sector, dd_idx);
After spin_unlock_irq, this thread scheded and toread may become null.
So it will be oops.
Signed-off-by: Jianpeng Ma <majianpeng@xxxxxxxxx>
---
drivers/md/raid5.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index dd73209..a56aa5b 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -2360,6 +2360,7 @@ static int add_stripe_bio(struct stripe_head *sh, struct bio *bi, int dd_idx, in
struct bio **bip;
struct r5conf *conf = sh->raid_conf;
int firstwrite=0;
+ sector_t sector = bi->bi_sector;
pr_debug("adding bi b#%llu to stripe s#%llu\n",
(unsigned long long)bi->bi_sector,
@@ -2410,7 +2411,7 @@ static int add_stripe_bio(struct stripe_head *sh, struct bio *bi, int dd_idx, in
spin_unlock_irq(&sh->stripe_lock);
pr_debug("added bi b#%llu to stripe s#%llu, disk %d.\n",
- (unsigned long long)(*bip)->bi_sector,
+ (unsigned long long)sector,
(unsigned long long)sh->sector, dd_idx);
if (conf->mddev->bitmap && firstwrite) {
--
1.7.9.5
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