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xfs: fix iclog allocation size 

Properly allocate the space for the bio_vecs instead of just one byte
per bio_vec.

Fixes: 79b54d9bfc ("xfs: use bios directly to write log buffers")
Reported-by: syzbot+b75afdbe271a0d7ac4f6@syzkaller.appspotmail.com
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
This commit is contained in:
Christoph Hellwig 2019-06-28 19:31:36 -07:00 committed by Darrick J. Wong
parent 250d4b4c40
commit 89b171acb2
1 changed files with 2 additions and 1 deletions
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3
fs/xfs/xfs_log.c
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@ -1411,7 +1411,8 @@ xlog_alloc_log(
*/
ASSERT(log->l_iclog_size >= 4096);
for (i = 0; i < log->l_iclog_bufs; i++) {
size_t bvec_size = howmany(log->l_iclog_size, PAGE_SIZE);
size_t bvec_size = howmany(log->l_iclog_size, PAGE_SIZE) *
sizeof(struct bio_vec);
iclog = kmem_zalloc(sizeof(*iclog) + bvec_size, KM_MAYFAIL);
if (!iclog)