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md/raid1: fix a use-after-free bug

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Commit fd76863 (RAID1: a new I/O barrier implementation to remove resync
window) introduces a user-after-free bug.

Signed-off-by: Shaohua Li <shli@fb.com>
This commit is contained in:
Shaohua Li 2017-02-19 22:41:27 -08:00
parent 824e47dadd
commit af5f42a7e4
1 changed files with 2 additions and 1 deletions
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3
drivers/md/raid1.c
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@ -203,6 +203,7 @@ static void free_r1bio(struct r1bio *r1_bio)
static void put_buf(struct r1bio *r1_bio)
{
struct r1conf *conf = r1_bio->mddev->private;
sector_t sect = r1_bio->sector;
int i;
for (i = 0; i < conf->raid_disks * 2; i++) {
@ -213,7 +214,7 @@ static void put_buf(struct r1bio *r1_bio)
mempool_free(r1_bio, conf->r1buf_pool);
lower_barrier(conf, r1_bio->sector);
lower_barrier(conf, sect);
}
static void reschedule_retry(struct r1bio *r1_bio)