[PULL,11/13] net/eth: Check iovec has enough data earlier

Commit Message

Jason Wang March 22, 2021, 10:08 a.m. UTC

From: Philippe Mathieu-Daudé <[e-mail]>

We want to check fields from ip6_ext_hdr_routing structure
and if correct read the full in6_address. Let's directly check
if our iovec contains enough data for everything, else return
early.

Suggested-by: Stefano Garzarella <[e-mail]>
Reviewed-by: Miroslav Rezanina <[e-mail]>
Signed-off-by: Philippe Mathieu-Daudé <[e-mail]>
Signed-off-by: Jason Wang <[e-mail]>
---
 net/eth.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Patch

diff --git a/net/eth.c b/net/eth.c
index 087aa71..6db943d 100644
--- a/net/eth.c
+++ b/net/eth.c
@@ -409,7 +409,7 @@  _eth_get_rss_ex_dst_addr(const struct iovec *pkt, int pkt_frags,
     size_t input_size = iov_size(pkt, pkt_frags);
     size_t bytes_read;
 
-    if (input_size < ext_hdr_offset + sizeof(*ext_hdr)) {
+    if (input_size < ext_hdr_offset + sizeof(*rthdr) + sizeof(*dst_addr)) {
         return false;
     }