From: Qu Wenruo wqu@suse.com
[ Upstream commit f15fb2cd979a07fbfc666e2f04b8b30ec9233b2a ]
In raid56_alloc_missing_rbio(), if we can not determine where the missing device is inside the full stripe, we just BUG_ON().
This is not necessary especially the only caller inside scrub.c is already properly checking the return value, and will treat it as a memory allocation failure.
Fix the error handling by:
- Add an extra warning for the reason Although personally speaking it may be better to be an ASSERT().
- Properly free the allocated rbio
Signed-off-by: Qu Wenruo wqu@suse.com Signed-off-by: David Sterba dsterba@suse.com Signed-off-by: Sasha Levin sashal@kernel.org --- fs/btrfs/raid56.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/fs/btrfs/raid56.c b/fs/btrfs/raid56.c index 2feb5c20641a..a21b9e085d1b 100644 --- a/fs/btrfs/raid56.c +++ b/fs/btrfs/raid56.c @@ -2767,8 +2767,10 @@ raid56_alloc_missing_rbio(struct bio *bio, struct btrfs_io_context *bioc)
rbio->faila = find_logical_bio_stripe(rbio, bio); if (rbio->faila == -1) { - BUG(); - kfree(rbio); + btrfs_warn_rl(fs_info, + "can not determine the failed stripe number for full stripe %llu", + bioc->raid_map[0]); + __free_raid_bio(rbio); return NULL; }