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btrfs: fix chunk map leak in btrfs_map_block() after btrfs_chunk_map_num_copies()

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Fix a chunk map leak in btrfs_map_block(): if we return early with -EINVAL,
we're not freeing the chunk map that we've just looked up.

Fixes: 0ae653fbec ("btrfs: reduce chunk_map lookups in btrfs_map_block()")
CC: stable@vger.kernel.org # 6.12+
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Mark Harmstone <mark@harmstone.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Mark Harmstone 2026-02-20 12:53:17 +00:00 • committed by David Sterba
parent 587bb33b10
commit f15fb3d415
1 changed files with 4 additions and 2 deletions
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6
fs/btrfs/volumes.c
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@ -6921,8 +6921,10 @@ int btrfs_map_block(struct btrfs_fs_info *fs_info, enum btrfs_map_op op,
}
num_copies = btrfs_chunk_map_num_copies(map);
if (io_geom.mirror_num > num_copies)
return -EINVAL;
if (io_geom.mirror_num > num_copies) {
ret = -EINVAL;
goto out;
}
map_offset = logical - map->start;
io_geom.raid56_full_stripe_start = (u64)-1;