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Btrfs: fix use-after-free in btrfs_replay_log
@log_root_tree should not be referenced after kfree. Signed-off-by: Liu Bo <bo.li.liu@oracle.com> Reviewed-by: David Sterba <dsterba@suse.cz> Reported-by: Julia Lawall <julia.lawall@lip6.fr> Signed-off-by: Chris Mason <clm@fb.com>
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1 changed files with 2 additions and 1 deletions
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@ -2321,8 +2321,9 @@ static int btrfs_replay_log(struct btrfs_fs_info *fs_info,
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fs_info->generation + 1);
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if (IS_ERR(log_tree_root->node)) {
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printk(KERN_ERR "BTRFS: failed to read log tree\n");
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ret = PTR_ERR(log_tree_root->node);
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kfree(log_tree_root);
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return PTR_ERR(log_tree_root->node);
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return ret;
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} else if (!extent_buffer_uptodate(log_tree_root->node)) {
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printk(KERN_ERR "BTRFS: failed to read log tree\n");
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free_extent_buffer(log_tree_root->node);
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