While we're in there, let's also fix up the decoder to do proper
bounds checking.
Signed-off-by: Jeff Layton <jlayton@xxxxxxxxxx>
---
net/ceph/osd_client.c | 20 +++++++++++++-------
1 file changed, 13 insertions(+), 7 deletions(-)
diff --git a/net/ceph/osd_client.c b/net/ceph/osd_client.c
index e6d31e0f0289..f8a4d29ef688 100644
--- a/net/ceph/osd_client.c
+++ b/net/ceph/osd_client.c
@@ -4914,20 +4914,26 @@ static int decode_watcher(void **p, void *end, struct ceph_watch_item *item)
ret = ceph_start_decoding(p, end, 2, "watch_item_t",
&struct_v, &struct_len);
if (ret)
- return ret;
+ goto bad;
+
+ ret = -EINVAL;
+ ceph_decode_copy_safe(p, end, &item->name, sizeof(item->name), bad);
+ ceph_decode_64_safe(p, end, item->cookie, bad);
+ ceph_decode_skip_32(p, end, bad); /* skip timeout seconds */
- ceph_decode_copy(p, &item->name, sizeof(item->name));
- item->cookie = ceph_decode_64(p);
- *p += 4; /* skip timeout_seconds */
if (struct_v >= 2) {
- ceph_decode_copy(p, &item->addr, sizeof(item->addr));
- ceph_decode_addr(&item->addr);
+ ret = ceph_decode_entity_addr(p, end, &item->addr);
+ if (ret)
+ goto bad;
+ } else {
+ ret = 0;
}
dout("%s %s%llu cookie %llu addr %s\n", __func__,
ENTITY_NAME(item->name), item->cookie,
ceph_pr_addr(&item->addr));
- return 0;
+bad:
+ return ret;
}
static int decode_watchers(void **p, void *end,
--
2.21.0
