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xfs: add missing bmap cancel calls in error paths

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If a failure occurs after the bmap free list is populated and before
xfs_bmap_finish() completes successfully (which returns a partial
list on failure), the bmap free list must be cancelled. Otherwise,
the extent items on the list are never freed and a memory leak
occurs.

Several random error paths throughout the code suffer this problem.
Fix these up such that xfs_bmap_cancel() is always called on error.

Signed-off-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
This commit is contained in:
Brian Foster 2015-08-19 10:01:40 +10:00 • committed by Dave Chinner
parent 146e54b71e
commit d4a97a0422
4 changed files with 41 additions and 36 deletions
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9
fs/xfs/xfs_inode.c
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@ -1791,14 +1791,15 @@ xfs_inactive_ifree(
xfs_trans_mod_dquot_byino(tp, ip, XFS_TRANS_DQ_ICOUNT, -1);
/*
* Just ignore errors at this point. There is nothing we can
* do except to try to keep going. Make sure it's not a silent
* error.
* Just ignore errors at this point. There is nothing we can do except
* to try to keep going. Make sure it's not a silent error.
*/
error = xfs_bmap_finish(&tp, &free_list, &committed);
if (error)
if (error) {
xfs_notice(mp, "%s: xfs_bmap_finish returned error %d",
__func__, error);
xfs_bmap_cancel(&free_list);
}
error = xfs_trans_commit(tp);
if (error)
xfs_notice(mp, "%s: xfs_trans_commit returned error %d",