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-rw-r--r--net/ceph/osdmap.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/net/ceph/osdmap.c b/net/ceph/osdmap.c
index df47871b838..d70aaca4a45 100644
--- a/net/ceph/osdmap.c
+++ b/net/ceph/osdmap.c
@@ -667,6 +667,9 @@ struct ceph_osdmap *osdmap_decode(void **p, void *end)
ceph_decode_need(p, end, sizeof(u32) + sizeof(u64), bad);
ceph_decode_copy(p, &pgid, sizeof(pgid));
n = ceph_decode_32(p);
+ err = -EINVAL;
+ if (n > (UINT_MAX - sizeof(*pg)) / sizeof(u32))
+ goto bad;
ceph_decode_need(p, end, n * sizeof(u32), bad);
err = -ENOMEM;
pg = kmalloc(sizeof(*pg) + n*sizeof(u32), GFP_NOFS);