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authorKarl Beldan <karl.beldan@rivierawaves.com>2014-10-21 16:06:05 +0200
committerDavid S. Miller <davem@davemloft.net>2014-10-22 12:52:55 -0400
commita63ba13eec092b70d4e5522d692eaeb2f9747387 (patch)
treec96eb5ffac7c3908f6790d6ca2b156602478934d /net/core/tso.c
parent8fc963515e893867330dec87464e9edc5204c024 (diff)
downloadlinux-a63ba13eec092b70d4e5522d692eaeb2f9747387.tar.bz2
net: tso: fix unaligned access to crafted TCP header in helper API
The crafted header start address is from a driver supplied buffer, which one can reasonably expect to be aligned on a 4-bytes boundary. However ATM the TSO helper API is only used by ethernet drivers and the tcp header will then be aligned to a 2-bytes only boundary from the header start address. Signed-off-by: Karl Beldan <karl.beldan@rivierawaves.com> Cc: Ezequiel Garcia <ezequiel.garcia@free-electrons.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core/tso.c')
-rw-r--r--net/core/tso.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/net/core/tso.c b/net/core/tso.c
index 8c3203c585b0..630b30b4fb53 100644
--- a/net/core/tso.c
+++ b/net/core/tso.c
@@ -1,6 +1,7 @@
#include <linux/export.h>
#include <net/ip.h>
#include <net/tso.h>
+#include <asm/unaligned.h>
/* Calculate expected number of TX descriptors */
int tso_count_descs(struct sk_buff *skb)
@@ -23,7 +24,7 @@ void tso_build_hdr(struct sk_buff *skb, char *hdr, struct tso_t *tso,
iph->id = htons(tso->ip_id);
iph->tot_len = htons(size + hdr_len - mac_hdr_len);
tcph = (struct tcphdr *)(hdr + skb_transport_offset(skb));
- tcph->seq = htonl(tso->tcp_seq);
+ put_unaligned_be32(tso->tcp_seq, &tcph->seq);
tso->ip_id++;
if (!is_last) {