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xfs: fix uninitialized variables in xrep_calc_ag_resblks

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If we can't read the AGF header, we never actually set a value for
freelen and usedlen.  These two variables are used to make the worst
case estimate of btree size, so it's safe to set them to the AG size as
a fallback.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Darrick J. Wong 2021-03-22 09:51:51 -07:00
parent e424aa5f54
commit 1aa26707eb
1 changed files with 5 additions and 1 deletions
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6
fs/xfs/scrub/repair.c
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@ -207,7 +207,11 @@ xrep_calc_ag_resblks(
/* Now grab the block counters from the AGF. */
error = xfs_alloc_read_agf(mp, NULL, sm->sm_agno, 0, &bp);
if (!error) {
if (error) {
aglen = xfs_ag_block_count(mp, sm->sm_agno);
freelen = aglen;
usedlen = aglen;
} else {
struct xfs_agf *agf = bp->b_addr;
aglen = be32_to_cpu(agf->agf_length);