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btrfs: release root after error in data_reloc_print_warning_inode()

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data_reloc_print_warning_inode() calls btrfs_get_fs_root() to obtain
local_root, but fails to release its reference when paths_from_inode()
returns an error. This causes a potential memory leak.

Add a missing btrfs_put_root() call in the error path to properly
decrease the reference count of local_root.

Fixes: b9a9a85059 ("btrfs: output affected files when relocation fails")
CC: stable@vger.kernel.org # 6.6+
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: Zilin Guan <zilin@seu.edu.cn>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Zilin Guan 2025-11-05 02:37:22 +00:00 committed by David Sterba
parent 5fea61aa1c
commit c367af440e
1 changed files with 3 additions and 1 deletions
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4
fs/btrfs/inode.c
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@ -177,8 +177,10 @@ static int data_reloc_print_warning_inode(u64 inum, u64 offset, u64 num_bytes,
return ret;
}
ret = paths_from_inode(inum, ipath);
if (ret < 0)
if (ret < 0) {
btrfs_put_root(local_root);
goto err;
}
/*
* We deliberately ignore the bit ipath might have been too small to