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libceph: safely decode max_osd value in osdmap_decode()

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max_osd value is not covered by any ceph_decode_need().  Use a safe
version of ceph_decode_* macro to decode it.

Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com>
Reviewed-by: Alex Elder <elder@linaro.org>
This commit is contained in:
Ilya Dryomov 2014-03-13 16:36:14 +02:00 committed by Sage Weil
parent 597b52f6ca
commit 3977058c46
1 changed files with 4 additions and 2 deletions
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6
net/ceph/osdmap.c
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@ -687,9 +687,10 @@ static int osdmap_set_max_osd(struct ceph_osdmap *map, int max)
static int osdmap_decode(void **p, void *end, struct ceph_osdmap *map)
{
u16 version;
u32 len, max, i;
u32 epoch = 0;
void *start = *p;
u32 max;
u32 len, i;
int err;
struct ceph_pg_pool_info *pi;
@ -736,7 +737,8 @@ static int osdmap_decode(void **p, void *end, struct ceph_osdmap *map)
ceph_decode_32_safe(p, end, map->flags, e_inval);
max = ceph_decode_32(p);
/* max_osd */
ceph_decode_32_safe(p, end, max, e_inval);
/* (re)alloc osd arrays */
err = osdmap_set_max_osd(map, max);