diff options
| -rw-r--r-- | target/linux/ar71xx/patches-3.7/902-unaligned_access_hacks.patch | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/target/linux/ar71xx/patches-3.7/902-unaligned_access_hacks.patch b/target/linux/ar71xx/patches-3.7/902-unaligned_access_hacks.patch index 23ee8a8aaa..7e4cf9feac 100644 --- a/target/linux/ar71xx/patches-3.7/902-unaligned_access_hacks.patch +++ b/target/linux/ar71xx/patches-3.7/902-unaligned_access_hacks.patch @@ -83,6 +83,15 @@ /* * The union cast uses a gcc extension to avoid aliasing problems +@@ -64,7 +64,7 @@ struct tcphdr { + union tcp_word_hdr { + struct tcphdr hdr; + __be32 words[5]; +-}; ++} __packed __attribute__((aligned(2))); + + #define tcp_flag_word(tp) ( ((union tcp_word_hdr *)(tp))->words [3]) + --- a/include/uapi/linux/udp.h +++ b/include/uapi/linux/udp.h @@ -24,7 +24,7 @@ struct udphdr { @@ -115,3 +124,35 @@ return true; } +--- a/include/uapi/linux/icmp.h ++++ b/include/uapi/linux/icmp.h +@@ -80,7 +80,7 @@ struct icmphdr { + __be16 mtu; + } frag; + } un; +-}; ++} __packed __attribute__((aligned(2))); + + + /* +--- a/net/ipv4/tcp_input.c ++++ b/net/ipv4/tcp_input.c +@@ -3842,13 +3842,14 @@ static bool tcp_parse_aligned_timestamp( + { + const __be32 *ptr = (const __be32 *)(th + 1); + +- if (*ptr == htonl((TCPOPT_NOP << 24) | (TCPOPT_NOP << 16) +- | (TCPOPT_TIMESTAMP << 8) | TCPOLEN_TIMESTAMP)) { ++ if (__get_unaligned_cpu32(ptr) == ++ htonl((TCPOPT_NOP << 24) | (TCPOPT_NOP << 16) | ++ (TCPOPT_TIMESTAMP << 8) | TCPOLEN_TIMESTAMP)) { + tp->rx_opt.saw_tstamp = 1; + ++ptr; +- tp->rx_opt.rcv_tsval = ntohl(*ptr); ++ tp->rx_opt.rcv_tsval = get_unaligned_be32(ptr); + ++ptr; +- tp->rx_opt.rcv_tsecr = ntohl(*ptr); ++ tp->rx_opt.rcv_tsecr = get_unaligned_be32(ptr); + return true; + } + return false; |