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btrfs: ref-verify: fix IS_ERR() vs NULL check in btrfs_build_ref_tree() 

btrfs_extent_root()/btrfs_global_root() does not return error pointers,
it returns NULL on error.

Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
Link: https://lore.kernel.org/all/aNJfvxj0anEnk9Dm@stanley.mountain/
Fixes : ed4e6b5d64 ("btrfs: ref-verify: handle damaged extent root tree")
CC: stable@vger.kernel.org # 6.17+
Signed-off-by: Amit Dhingra <mechanicalamit@gmail.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Amit Dhingra 2025-10-21 07:07:20 -05:00 committed by David Sterba
parent 0fd7e7a1ad
commit ada7d45b56
1 changed files with 1 additions and 1 deletions
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2
fs/btrfs/ref-verify.c
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@ -982,7 +982,7 @@ int btrfs_build_ref_tree(struct btrfs_fs_info *fs_info)
extent_root = btrfs_extent_root(fs_info, 0); extent_root = btrfs_extent_root(fs_info, 0);
/* If the extent tree is damaged we cannot ignore it (IGNOREBADROOTS). */ /* If the extent tree is damaged we cannot ignore it (IGNOREBADROOTS). */
if (IS_ERR(extent_root)) { if (!extent_root) {
btrfs_warn(fs_info, "ref-verify: extent tree not available, disabling"); btrfs_warn(fs_info, "ref-verify: extent tree not available, disabling");
btrfs_clear_opt(fs_info->mount_opt, REF_VERIFY); btrfs_clear_opt(fs_info->mount_opt, REF_VERIFY);
return 0; return 0;