From c62f6bec53e63b11112e1ebce6bbaa39ce6f6706 Mon Sep 17 00:00:00 2001 From: Johannes Thumshirn Date: Fri, 4 Nov 2022 07:12:35 -0700 Subject: [PATCH] btrfs: zoned: fix locking imbalance on scrub If we're doing device replace on a zoned filesystem and discover in scrub_enumerate_chunks() that we don't have to copy the block group it is unlocked before it gets skipped. But as the block group hasn't yet been locked before it leads to a locking imbalance. To fix this simply remove the unlock. This was uncovered by fstests' testcase btrfs/163. Fixes: 9283b9e09a6d ("btrfs: remove lock protection for BLOCK_GROUP_FLAG_TO_COPY") Signed-off-by: Johannes Thumshirn Reviewed-by: David Sterba Signed-off-by: David Sterba --- fs/btrfs/scrub.c | 1 - 1 file changed, 1 deletion(-) diff --git a/fs/btrfs/scrub.c b/fs/btrfs/scrub.c index b659c67af1e0..196c4c6ed1ed 100644 --- a/fs/btrfs/scrub.c +++ b/fs/btrfs/scrub.c @@ -3911,7 +3911,6 @@ int scrub_enumerate_chunks(struct scrub_ctx *sctx, if (sctx->is_dev_replace && btrfs_is_zoned(fs_info)) { if (!test_bit(BLOCK_GROUP_FLAG_TO_COPY, &cache->runtime_flags)) { - spin_unlock(&cache->lock); btrfs_put_block_group(cache); goto skip; } -- GitLab