From e46a28ca3d0dce8d939b10d4c94eaa2307b6415a Mon Sep 17 00:00:00 2001 From: Liu Bo Date: Fri, 29 Jul 2016 10:57:55 -0700 Subject: [PATCH] Btrfs: remove BUG() in raid56 This BUG() has been triggered by a fuzz testing image, which contains an invalid chunk type, ie. a single stripe chunk has the raid6 type. Btrfs can handle this gracefully by returning -EIO, so besides using btrfs_warn to give us more debugging information rather than a single BUG(), we can return error properly. Signed-off-by: Liu Bo Reviewed-by: David Sterba Signed-off-by: David Sterba --- fs/btrfs/raid56.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/fs/btrfs/raid56.c b/fs/btrfs/raid56.c index cd8d302a1f61..d016d4a79864 100644 --- a/fs/btrfs/raid56.c +++ b/fs/btrfs/raid56.c @@ -2143,7 +2143,10 @@ int raid56_parity_recover(struct btrfs_root *root, struct bio *bio, rbio->faila = find_logical_bio_stripe(rbio, bio); if (rbio->faila == -1) { - BUG(); + btrfs_warn(root->fs_info, + "%s could not find the bad stripe in raid56 so that we cannot recover any more (bio has logical %llu len %llu, bbio has map_type %llu)", + __func__, (u64)bio->bi_iter.bi_sector << 9, + (u64)bio->bi_iter.bi_size, bbio->map_type); if (generic_io) btrfs_put_bbio(bbio); kfree(rbio);