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xfs: xfs_dabuf_map should return ENOMEM when map allocation fails

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If the xfs_buf_map array allocation in xfs_dabuf_map fails for whatever
reason, we bail out with error code zero.  This will confuse callers, so
make sure that we return ENOMEM.  Allocation failure should never happen
with the small size of the array, but code defensively anyway.

Fixes: 45feef8f50 ("xfs: refactor xfs_dabuf_map")
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
This commit is contained in:
Darrick J. Wong 2020-03-13 13:17:40 -07:00
parent 13859c9843
commit faf8ee8476
1 changed files with 3 additions and 1 deletions
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4
fs/xfs/libxfs/xfs_da_btree.c
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@ -2521,8 +2521,10 @@ xfs_dabuf_map(
*/
if (nirecs > 1) {
map = kmem_zalloc(nirecs * sizeof(struct xfs_buf_map), KM_NOFS);
if (!map)
if (!map) {
error = -ENOMEM;
goto out_free_irecs;
}
*mapp = map;
}