[PATCH 01/40] btrfs: fix submission hook error handling in btrfs_repair_one_sector

[Christoph Hellwig <hch@lst.de>]

btrfs_repair_one_sector just wants to free the bio if submit_bio_hook
fails, but btrfs_submit_data_bio will call bio_endio which will call
into the submitter of the original bio and free the bio there as well.

Move the bio_endio calls from btrfs_submit_data_bio and
btrfs_submit_metadata_bio into submit_one_bio to fix this double free.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 fs/btrfs/disk-io.c   | 2 --
 fs/btrfs/extent_io.c | 4 ++++
 fs/btrfs/inode.c     | 4 ----
 3 files changed, 4 insertions(+), 6 deletions(-)

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index b3e9cf3fd1dd1..c245e1b131964 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -941,8 +941,6 @@ blk_status_t btrfs_submit_metadata_bio(struct inode *inode, struct bio *bio,
 	return 0;
 
 out_w_error:
-	bio->bi_status = ret;
-	bio_endio(bio);
 	return ret;
 }
 
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index 3b386bbb85a7f..e9fa0f6d605ee 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -181,6 +181,10 @@ int __must_check submit_one_bio(struct bio *bio, int mirror_num,
 		ret = btrfs_submit_metadata_bio(tree->private_data, bio,
 						mirror_num, bio_flags);
 
+	if (ret) {
+		bio->bi_status = ret;
+		bio_endio(bio);
+	}
 	return blk_status_to_errno(ret);
 }
 
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 5bbea5ec31fc5..3ef8b63bb1b5c 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -2571,10 +2571,6 @@ blk_status_t btrfs_submit_data_bio(struct inode *inode, struct bio *bio,
 	ret = btrfs_map_bio(fs_info, bio, mirror_num);
 
 out:
-	if (ret) {
-		bio->bi_status = ret;
-		bio_endio(bio);
-	}
 	return ret;
 }
 
-- 
2.30.2