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| author | Thomas Gleixner <tglx@linutronix.de> | 2018-03-08 17:52:08 +0300 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2018-03-08 17:52:08 +0300 |
| commit | 422caa5f7a455920369039d04c6070eb50d6146b (patch) | |
| tree | 8667d9587c412ee25660184f6e943ed10e445bc0 /drivers/md/raid1.c | |
| parent | 8a331f4a0863bea758561c921b94b4d28f7c4029 (diff) | |
| parent | b3b7c4795ccab5be71f080774c45bbbcc75c2aaf (diff) | |
| download | linux-422caa5f7a455920369039d04c6070eb50d6146b.tar.xz | |
Merge branch 'ras/urgent' into ras/core
Pick up urgent fixes to apply further development changes.
Diffstat (limited to 'drivers/md/raid1.c')
| -rw-r--r-- | drivers/md/raid1.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c index b2eae332e1a2..fe872dc6712e 100644 --- a/drivers/md/raid1.c +++ b/drivers/md/raid1.c @@ -1108,7 +1108,7 @@ static void alloc_behind_master_bio(struct r1bio *r1_bio, bio_copy_data(behind_bio, bio); skip_copy: - r1_bio->behind_master_bio = behind_bio;; + r1_bio->behind_master_bio = behind_bio; set_bit(R1BIO_BehindIO, &r1_bio->state); return; @@ -1809,6 +1809,17 @@ static int raid1_remove_disk(struct mddev *mddev, struct md_rdev *rdev) struct md_rdev *repl = conf->mirrors[conf->raid_disks + number].rdev; freeze_array(conf, 0); + if (atomic_read(&repl->nr_pending)) { + /* It means that some queued IO of retry_list + * hold repl. Thus, we cannot set replacement + * as NULL, avoiding rdev NULL pointer + * dereference in sync_request_write and + * handle_write_finished. + */ + err = -EBUSY; + unfreeze_array(conf); + goto abort; + } clear_bit(Replacement, &repl->flags); p->rdev = repl; conf->mirrors[conf->raid_disks + number].rdev = NULL; |