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xfs: Ensure we have target_ip for RENAME_EXCHANGE

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We shouldn't get here with RENAME_EXCHANGE set and no
target_ip, but let's be defensive, because xfs_cross_rename()
will dereference it.

Spotted by Coverity.

Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dave Chinner <david@fromorbit.com>
This commit is contained in:
Eric Sandeen 2015-02-24 10:12:55 +11:00 committed by Dave Chinner
parent 5885ebda87
commit fc921566f4
1 changed files with 4 additions and 0 deletions
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4
fs/xfs/xfs_inode.c
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@ -2867,6 +2867,10 @@ xfs_rename(
* Handle RENAME_EXCHANGE flags
*/
if (flags & RENAME_EXCHANGE) {
if (target_ip == NULL) {
error = -EINVAL;
goto error_return;
}
error = xfs_cross_rename(tp, src_dp, src_name, src_ip,
target_dp, target_name, target_ip,
&free_list, &first_block, spaceres);