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libceph: fix misjudgement of maximum monitor number

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num_mon should allow up to CEPH_MAX_MON in ceph_monmap_decode().

Signed-off-by: Chengguang Xu <cgxu519@icloud.com>
Reviewed-by: Ilya Dryomov <idryomov@gmail.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
This commit is contained in:
Chengguang Xu 2018-02-11 09:33:28 +08:00 committed by Ilya Dryomov
parent 11e1478df9
commit 7377324e5b
1 changed files with 1 additions and 1 deletions
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2
net/ceph/mon_client.c
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@ -60,7 +60,7 @@ struct ceph_monmap *ceph_monmap_decode(void *p, void *end)
num_mon = ceph_decode_32(&p);
ceph_decode_need(&p, end, num_mon*sizeof(m->mon_inst[0]), bad);
if (num_mon >= CEPH_MAX_MON)
if (num_mon > CEPH_MAX_MON)
goto bad;
m = kmalloc(sizeof(*m) + sizeof(m->mon_inst[0])*num_mon, GFP_NOFS);
if (m == NULL)