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authorShannon Nelson <shannon.nelson@oracle.com>2017-01-12 14:24:58 -0800
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-02-04 09:45:08 +0100
commitb82981fb273d3d0759bff5a55449f4c22f977869 (patch)
treed1d931754b8e45cae11c73d8aa8441e468c70e1e /net/ipv4
parentec9e993f30f6374dc69fa5ff2d8c57e7572630a8 (diff)
tcp: fix tcp_fastopen unaligned access complaints on sparc
[ Upstream commit 003c941057eaa868ca6fedd29a274c863167230d ] Fix up a data alignment issue on sparc by swapping the order of the cookie byte array field with the length field in struct tcp_fastopen_cookie, and making it a proper union to clean up the typecasting. This addresses log complaints like these: log_unaligned: 113 callbacks suppressed Kernel unaligned access at TPC[976490] tcp_try_fastopen+0x2d0/0x360 Kernel unaligned access at TPC[9764ac] tcp_try_fastopen+0x2ec/0x360 Kernel unaligned access at TPC[9764c8] tcp_try_fastopen+0x308/0x360 Kernel unaligned access at TPC[9764e4] tcp_try_fastopen+0x324/0x360 Kernel unaligned access at TPC[976490] tcp_try_fastopen+0x2d0/0x360 Cc: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: Shannon Nelson <shannon.nelson@oracle.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net/ipv4')
-rw-r--r--net/ipv4/tcp_fastopen.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv4/tcp_fastopen.c b/net/ipv4/tcp_fastopen.c
index 55be6ac70cff..32489e499a86 100644
--- a/net/ipv4/tcp_fastopen.c
+++ b/net/ipv4/tcp_fastopen.c
@@ -112,7 +112,7 @@ static bool tcp_fastopen_cookie_gen(struct request_sock *req,
struct tcp_fastopen_cookie tmp;
if (__tcp_fastopen_cookie_gen(&ip6h->saddr, &tmp)) {
- struct in6_addr *buf = (struct in6_addr *) tmp.val;
+ struct in6_addr *buf = &tmp.addr;
int i;
for (i = 0; i < 4; i++)