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authorDan Carpenter <dan.carpenter@oracle.com>2013-07-22 10:55:15 +0400
committerChris Mason <chris.mason@fusionio.com>2013-09-01 16:04:26 +0400
commit3dc0e818afa25a605091b6a16c2c4e5698c0a9c2 (patch)
tree148c006bde1ff423c9623e33ccd1d45ae16688fd /fs/btrfs/raid56.c
parent2112ac800d43e795323bc18558e43fd3641da4ed (diff)
downloadlinux-3dc0e818afa25a605091b6a16c2c4e5698c0a9c2.tar.xz
btrfs/raid56: fix and cleanup some error paths
The alloc_rbio() frees "raid_map" and "bbio" on error, so there is a potential double free bug in raid56_parity_write(). The raid56_parity_write() and raid56_parity_recover() functions should still free "raid_map" and "bbio" on error if other errors occur though, so I have added some more calls to kfree(). Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Reviewed-by: Miao Xie <miaox@cn.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
Diffstat (limited to 'fs/btrfs/raid56.c')
-rw-r--r--fs/btrfs/raid56.c10
1 files changed, 4 insertions, 6 deletions
diff --git a/fs/btrfs/raid56.c b/fs/btrfs/raid56.c
index 0525e1389f5b..0db856ceecc4 100644
--- a/fs/btrfs/raid56.c
+++ b/fs/btrfs/raid56.c
@@ -1687,11 +1687,8 @@ int raid56_parity_write(struct btrfs_root *root, struct bio *bio,
struct blk_plug_cb *cb;
rbio = alloc_rbio(root, bbio, raid_map, stripe_len);
- if (IS_ERR(rbio)) {
- kfree(raid_map);
- kfree(bbio);
+ if (IS_ERR(rbio))
return PTR_ERR(rbio);
- }
bio_list_add(&rbio->bio_list, bio);
rbio->bio_list_bytes = bio->bi_size;
@@ -2041,9 +2038,8 @@ int raid56_parity_recover(struct btrfs_root *root, struct bio *bio,
int ret;
rbio = alloc_rbio(root, bbio, raid_map, stripe_len);
- if (IS_ERR(rbio)) {
+ if (IS_ERR(rbio))
return PTR_ERR(rbio);
- }
rbio->read_rebuild = 1;
bio_list_add(&rbio->bio_list, bio);
@@ -2052,6 +2048,8 @@ int raid56_parity_recover(struct btrfs_root *root, struct bio *bio,
rbio->faila = find_logical_bio_stripe(rbio, bio);
if (rbio->faila == -1) {
BUG();
+ kfree(raid_map);
+ kfree(bbio);
kfree(rbio);
return -EIO;
}