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| author | Fedor Pchelkin <pchelkin@ispras.ru> | 2024-01-03 13:31:27 +0300 |
|---|---|---|
| committer | Sasha Levin <sashal@kernel.org> | 2024-03-15 17:48:16 +0300 |
| commit | 40011850de6d613e982c84c854018aeca2c6bb19 (patch) | |
| tree | b8678d777d5cad591045c1b1e0e285420ef933eb /fs | |
| parent | d623fd5298d95b65d27ef5a618ebf39541074856 (diff) | |
| download | linux-40011850de6d613e982c84c854018aeca2c6bb19.tar.xz | |
btrfs: ref-verify: free ref cache before clearing mount opt
[ Upstream commit f03e274a8b29d1d1c1bbd7f764766cb5ca537ab7 ]
As clearing REF_VERIFY mount option indicates there were some errors in a
ref-verify process, a ref cache is not relevant anymore and should be
freed.
btrfs_free_ref_cache() requires REF_VERIFY option being set so call
it just before clearing the mount option.
Found by Linux Verification Center (linuxtesting.org) with Syzkaller.
Reported-by: syzbot+be14ed7728594dc8bd42@syzkaller.appspotmail.com
Fixes: fd708b81d972 ("Btrfs: add a extent ref verify tool")
CC: stable@vger.kernel.org # 5.4+
Closes: https://lore.kernel.org/lkml/000000000000e5a65c05ee832054@google.com/
Reported-by: syzbot+c563a3c79927971f950f@syzkaller.appspotmail.com
Closes: https://lore.kernel.org/lkml/0000000000007fe09705fdc6086c@google.com/
Reviewed-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: Fedor Pchelkin <pchelkin@ispras.ru>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/btrfs/ref-verify.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/fs/btrfs/ref-verify.c b/fs/btrfs/ref-verify.c index b26739d0e991..7bb816a6d1e1 100644 --- a/fs/btrfs/ref-verify.c +++ b/fs/btrfs/ref-verify.c @@ -891,8 +891,10 @@ int btrfs_ref_tree_mod(struct btrfs_root *root, u64 bytenr, u64 num_bytes, out_unlock: spin_unlock(&root->fs_info->ref_verify_lock); out: - if (ret) + if (ret) { + btrfs_free_ref_cache(fs_info); btrfs_clear_opt(fs_info->mount_opt, REF_VERIFY); + } return ret; } @@ -1021,8 +1023,8 @@ int btrfs_build_ref_tree(struct btrfs_fs_info *fs_info) } } if (ret) { - btrfs_clear_opt(fs_info->mount_opt, REF_VERIFY); btrfs_free_ref_cache(fs_info); + btrfs_clear_opt(fs_info->mount_opt, REF_VERIFY); } btrfs_free_path(path); return ret; |