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xfs: Initialize variables in xfs_alloc_get_rec before using them 

Make sure we initialize *bno and *len, before jumping to out_bad_rec
label, and risk calling xfs_warn() with uninitialized variables.

Coverity: 100898
Coverity: 1437081
Coverity: 1437129
Coverity: 1437191
Coverity: 1437201
Coverity: 1437212
Coverity: 1437341
Signed-off-by: Carlos Maiolino <cmaiolino@redhat.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
This commit is contained in:
Carlos Maiolino 2018-06-28 06:56:23 -07:00 committed by Darrick J. Wong
parent d8cb5e4237
commit 9991274fdd
1 changed files with 3 additions and 2 deletions
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5
fs/xfs/libxfs/xfs_alloc.c
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@ -223,12 +223,13 @@ xfs_alloc_get_rec(
error = xfs_btree_get_rec(cur, &rec, stat);
if (error || !(*stat))
return error;
if (rec->alloc.ar_blockcount == 0)
goto out_bad_rec;
*bno = be32_to_cpu(rec->alloc.ar_startblock);
*len = be32_to_cpu(rec->alloc.ar_blockcount);
if (*len == 0)
goto out_bad_rec;
/* check for valid extent range, including overflow */
if (!xfs_verify_agbno(mp, agno, *bno))
goto out_bad_rec;