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9d1e4e524e4c2cf185d14662d1b751fb00dad2af
[openwrt/openwrt.git] / target / linux / ar71xx / patches-4.14 / 910-unaligned_access_hacks.patch
1 --- a/arch/mips/include/asm/checksum.h
2 +++ b/arch/mips/include/asm/checksum.h
3 @@ -134,26 +134,30 @@ static inline __sum16 ip_fast_csum(const
4 const unsigned int *stop = word + ihl;
5 unsigned int csum;
6 int carry;
7 + unsigned int w;
8
9 - csum = word[0];
10 - csum += word[1];
11 - carry = (csum < word[1]);
12 + csum = net_hdr_word(word++);
13 +
14 + w = net_hdr_word(word++);
15 + csum += w;
16 + carry = (csum < w);
17 csum += carry;
18
19 - csum += word[2];
20 - carry = (csum < word[2]);
21 + w = net_hdr_word(word++);
22 + csum += w;
23 + carry = (csum < w);
24 csum += carry;
25
26 - csum += word[3];
27 - carry = (csum < word[3]);
28 + w = net_hdr_word(word++);
29 + csum += w;
30 + carry = (csum < w);
31 csum += carry;
32
33 - word += 4;
34 do {
35 - csum += *word;
36 - carry = (csum < *word);
37 + w = net_hdr_word(word++);
38 + csum += w;
39 + carry = (csum < w);
40 csum += carry;
41 - word++;
42 } while (word != stop);
43
44 return csum_fold(csum);
45 @@ -214,73 +218,6 @@ static inline __sum16 ip_compute_csum(co
46 return csum_fold(csum_partial(buff, len, 0));
47 }
48
49 -#define _HAVE_ARCH_IPV6_CSUM
50 -static __inline__ __sum16 csum_ipv6_magic(const struct in6_addr *saddr,
51 - const struct in6_addr *daddr,
52 - __u32 len, __u8 proto,
53 - __wsum sum)
54 -{
55 - __wsum tmp;
56 -
57 - __asm__(
58 - " .set push # csum_ipv6_magic\n"
59 - " .set noreorder \n"
60 - " .set noat \n"
61 - " addu %0, %5 # proto (long in network byte order)\n"
62 - " sltu $1, %0, %5 \n"
63 - " addu %0, $1 \n"
64 -
65 - " addu %0, %6 # csum\n"
66 - " sltu $1, %0, %6 \n"
67 - " lw %1, 0(%2) # four words source address\n"
68 - " addu %0, $1 \n"
69 - " addu %0, %1 \n"
70 - " sltu $1, %0, %1 \n"
71 -
72 - " lw %1, 4(%2) \n"
73 - " addu %0, $1 \n"
74 - " addu %0, %1 \n"
75 - " sltu $1, %0, %1 \n"
76 -
77 - " lw %1, 8(%2) \n"
78 - " addu %0, $1 \n"
79 - " addu %0, %1 \n"
80 - " sltu $1, %0, %1 \n"
81 -
82 - " lw %1, 12(%2) \n"
83 - " addu %0, $1 \n"
84 - " addu %0, %1 \n"
85 - " sltu $1, %0, %1 \n"
86 -
87 - " lw %1, 0(%3) \n"
88 - " addu %0, $1 \n"
89 - " addu %0, %1 \n"
90 - " sltu $1, %0, %1 \n"
91 -
92 - " lw %1, 4(%3) \n"
93 - " addu %0, $1 \n"
94 - " addu %0, %1 \n"
95 - " sltu $1, %0, %1 \n"
96 -
97 - " lw %1, 8(%3) \n"
98 - " addu %0, $1 \n"
99 - " addu %0, %1 \n"
100 - " sltu $1, %0, %1 \n"
101 -
102 - " lw %1, 12(%3) \n"
103 - " addu %0, $1 \n"
104 - " addu %0, %1 \n"
105 - " sltu $1, %0, %1 \n"
106 -
107 - " addu %0, $1 # Add final carry\n"
108 - " .set pop"
109 - : "=&r" (sum), "=&r" (tmp)
110 - : "r" (saddr), "r" (daddr),
111 - "0" (htonl(len)), "r" (htonl(proto)), "r" (sum));
112 -
113 - return csum_fold(sum);
114 -}
115 -
116 #include <asm-generic/checksum.h>
117 #endif /* CONFIG_GENERIC_CSUM */
118
119 --- a/include/uapi/linux/ip.h
120 +++ b/include/uapi/linux/ip.h
121 @@ -103,7 +103,7 @@ struct iphdr {
122 __be32 saddr;
123 __be32 daddr;
124 /*The options start here. */
125 -};
126 +} __attribute__((packed, aligned(2)));
127
128
129 struct ip_auth_hdr {
130 --- a/include/uapi/linux/ipv6.h
131 +++ b/include/uapi/linux/ipv6.h
132 @@ -104,7 +104,7 @@ struct ipv6_destopt_hao {
133 __u8 type;
134 __u8 length;
135 struct in6_addr addr;
136 -} __attribute__((packed));
137 +} __attribute__((packed, aligned(2)));
138
139 /*
140 * IPv6 fixed header
141 @@ -131,7 +131,7 @@ struct ipv6hdr {
142
143 struct in6_addr saddr;
144 struct in6_addr daddr;
145 -};
146 +} __attribute__((packed, aligned(2)));
147
148
149 /* index values for the variables in ipv6_devconf */
150 --- a/include/uapi/linux/tcp.h
151 +++ b/include/uapi/linux/tcp.h
152 @@ -55,7 +55,7 @@ struct tcphdr {
153 __be16 window;
154 __sum16 check;
155 __be16 urg_ptr;
156 -};
157 +} __attribute__((packed, aligned(2)));
158
159 /*
160 * The union cast uses a gcc extension to avoid aliasing problems
161 @@ -65,7 +65,7 @@ struct tcphdr {
162 union tcp_word_hdr {
163 struct tcphdr hdr;
164 __be32 words[5];
165 -};
166 +} __attribute__((packed, aligned(2)));
167
168 #define tcp_flag_word(tp) ( ((union tcp_word_hdr *)(tp))->words [3])
169
170 --- a/include/uapi/linux/udp.h
171 +++ b/include/uapi/linux/udp.h
172 @@ -25,7 +25,7 @@ struct udphdr {
173 __be16 dest;
174 __be16 len;
175 __sum16 check;
176 -};
177 +} __attribute__((packed, aligned(2)));
178
179 /* UDP socket options */
180 #define UDP_CORK 1 /* Never send partially complete segments */
181 --- a/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c
182 +++ b/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c
183 @@ -48,8 +48,8 @@ static bool ipv4_pkt_to_tuple(const stru
184 if (ap == NULL)
185 return false;
186
187 - tuple->src.u3.ip = ap[0];
188 - tuple->dst.u3.ip = ap[1];
189 + tuple->src.u3.ip = net_hdr_word(ap++);
190 + tuple->dst.u3.ip = net_hdr_word(ap);
191
192 return true;
193 }
194 --- a/include/uapi/linux/icmp.h
195 +++ b/include/uapi/linux/icmp.h
196 @@ -82,7 +82,7 @@ struct icmphdr {
197 } frag;
198 __u8 reserved[4];
199 } un;
200 -};
201 +} __attribute__((packed, aligned(2)));
202
203
204 /*
205 --- a/include/uapi/linux/in6.h
206 +++ b/include/uapi/linux/in6.h
207 @@ -43,7 +43,7 @@ struct in6_addr {
208 #define s6_addr16 in6_u.u6_addr16
209 #define s6_addr32 in6_u.u6_addr32
210 #endif
211 -};
212 +} __attribute__((packed, aligned(2)));
213 #endif /* __UAPI_DEF_IN6_ADDR */
214
215 #if __UAPI_DEF_SOCKADDR_IN6
216 --- a/net/ipv6/tcp_ipv6.c
217 +++ b/net/ipv6/tcp_ipv6.c
218 @@ -39,6 +39,7 @@
219 #include <linux/ipsec.h>
220 #include <linux/times.h>
221 #include <linux/slab.h>
222 +#include <asm/unaligned.h>
223 #include <linux/uaccess.h>
224 #include <linux/ipv6.h>
225 #include <linux/icmpv6.h>
226 @@ -820,10 +821,10 @@ static void tcp_v6_send_response(const s
227 topt = (__be32 *)(t1 + 1);
228
229 if (tsecr) {
230 - *topt++ = htonl((TCPOPT_NOP << 24) | (TCPOPT_NOP << 16) |
231 - (TCPOPT_TIMESTAMP << 8) | TCPOLEN_TIMESTAMP);
232 - *topt++ = htonl(tsval);
233 - *topt++ = htonl(tsecr);
234 + put_unaligned_be32((TCPOPT_NOP << 24) | (TCPOPT_NOP << 16) |
235 + (TCPOPT_TIMESTAMP << 8) | TCPOLEN_TIMESTAMP, topt++);
236 + put_unaligned_be32(tsval, topt++);
237 + put_unaligned_be32(tsecr, topt++);
238 }
239
240 #ifdef CONFIG_TCP_MD5SIG
241 --- a/include/linux/ipv6.h
242 +++ b/include/linux/ipv6.h
243 @@ -6,6 +6,7 @@
244
245 #define ipv6_optlen(p) (((p)->hdrlen+1) << 3)
246 #define ipv6_authlen(p) (((p)->hdrlen+2) << 2)
247 +
248 /*
249 * This structure contains configuration options per IPv6 link.
250 */
251 --- a/net/ipv6/datagram.c
252 +++ b/net/ipv6/datagram.c
253 @@ -486,7 +486,7 @@ int ipv6_recv_error(struct sock *sk, str
254 ipv6_iface_scope_id(&sin->sin6_addr,
255 IP6CB(skb)->iif);
256 } else {
257 - ipv6_addr_set_v4mapped(*(__be32 *)(nh + serr->addr_offset),
258 + ipv6_addr_set_v4mapped(net_hdr_word(nh + serr->addr_offset),
259 &sin->sin6_addr);
260 sin->sin6_scope_id = 0;
261 }
262 @@ -835,12 +835,12 @@ int ip6_datagram_send_ctl(struct net *ne
263 }
264
265 if (fl6->flowlabel&IPV6_FLOWINFO_MASK) {
266 - if ((fl6->flowlabel^*(__be32 *)CMSG_DATA(cmsg))&~IPV6_FLOWINFO_MASK) {
267 + if ((fl6->flowlabel^net_hdr_word(CMSG_DATA(cmsg)))&~IPV6_FLOWINFO_MASK) {
268 err = -EINVAL;
269 goto exit_f;
270 }
271 }
272 - fl6->flowlabel = IPV6_FLOWINFO_MASK & *(__be32 *)CMSG_DATA(cmsg);
273 + fl6->flowlabel = IPV6_FLOWINFO_MASK & net_hdr_word(CMSG_DATA(cmsg));
274 break;
275
276 case IPV6_2292HOPOPTS:
277 --- a/net/ipv6/ip6_gre.c
278 +++ b/net/ipv6/ip6_gre.c
279 @@ -397,7 +397,7 @@ static void ip6gre_err(struct sk_buff *s
280 return;
281 ipv6h = (const struct ipv6hdr *)skb->data;
282 greh = (const struct gre_base_hdr *)(skb->data + offset);
283 - key = key_off ? *(__be32 *)(skb->data + key_off) : 0;
284 + key = key_off ? net_hdr_word((__be32 *)(skb->data + key_off)) : 0;
285
286 t = ip6gre_tunnel_lookup(skb->dev, &ipv6h->daddr, &ipv6h->saddr,
287 key, greh->protocol);
288 --- a/net/ipv6/exthdrs.c
289 +++ b/net/ipv6/exthdrs.c
290 @@ -733,7 +733,7 @@ static bool ipv6_hop_jumbo(struct sk_buf
291 goto drop;
292 }
293
294 - pkt_len = ntohl(*(__be32 *)(nh + optoff + 2));
295 + pkt_len = ntohl(net_hdr_word(nh + optoff + 2));
296 if (pkt_len <= IPV6_MAXPLEN) {
297 __IP6_INC_STATS(net, ipv6_skb_idev(skb),
298 IPSTATS_MIB_INHDRERRORS);
299 --- a/include/linux/types.h
300 +++ b/include/linux/types.h
301 @@ -229,5 +229,11 @@ struct callback_head {
302 typedef void (*rcu_callback_t)(struct rcu_head *head);
303 typedef void (*call_rcu_func_t)(struct rcu_head *head, rcu_callback_t func);
304
305 +struct net_hdr_word {
306 + u32 words[1];
307 +} __attribute__((packed, aligned(2)));
308 +
309 +#define net_hdr_word(_p) (((struct net_hdr_word *) (_p))->words[0])
310 +
311 #endif /* __ASSEMBLY__ */
312 #endif /* _LINUX_TYPES_H */
313 --- a/net/ipv4/af_inet.c
314 +++ b/net/ipv4/af_inet.c
315 @@ -1352,8 +1352,8 @@ struct sk_buff **inet_gro_receive(struct
316 if (unlikely(ip_fast_csum((u8 *)iph, 5)))
317 goto out_unlock;
318
319 - id = ntohl(*(__be32 *)&iph->id);
320 - flush = (u16)((ntohl(*(__be32 *)iph) ^ skb_gro_len(skb)) | (id & ~IP_DF));
321 + id = ntohl(net_hdr_word(&iph->id));
322 + flush = (u16)((ntohl(net_hdr_word(iph)) ^ skb_gro_len(skb)) | (id & ~IP_DF));
323 id >>= 16;
324
325 for (p = *head; p; p = p->next) {
326 --- a/net/ipv4/route.c
327 +++ b/net/ipv4/route.c
328 @@ -465,7 +465,7 @@ static struct neighbour *ipv4_neigh_look
329 else if (skb)
330 pkey = &ip_hdr(skb)->daddr;
331
332 - n = __ipv4_neigh_lookup(dev, *(__force u32 *)pkey);
333 + n = __ipv4_neigh_lookup(dev, net_hdr_word(pkey));
334 if (n)
335 return n;
336 return neigh_create(&arp_tbl, pkey, dev);
337 --- a/net/ipv4/tcp_output.c
338 +++ b/net/ipv4/tcp_output.c
339 @@ -454,48 +454,53 @@ static void tcp_options_write(__be32 *pt
340 u16 options = opts->options; /* mungable copy */
341
342 if (unlikely(OPTION_MD5 & options)) {
343 - *ptr++ = htonl((TCPOPT_NOP << 24) | (TCPOPT_NOP << 16) |
344 - (TCPOPT_MD5SIG << 8) | TCPOLEN_MD5SIG);
345 + net_hdr_word(ptr++) =
346 + htonl((TCPOPT_NOP << 24) | (TCPOPT_NOP << 16) |
347 + (TCPOPT_MD5SIG << 8) | TCPOLEN_MD5SIG);
348 /* overload cookie hash location */
349 opts->hash_location = (__u8 *)ptr;
350 ptr += 4;
351 }
352
353 if (unlikely(opts->mss)) {
354 - *ptr++ = htonl((TCPOPT_MSS << 24) |
355 - (TCPOLEN_MSS << 16) |
356 - opts->mss);
357 + net_hdr_word(ptr++) =
358 + htonl((TCPOPT_MSS << 24) | (TCPOLEN_MSS << 16) |
359 + opts->mss);
360 }
361
362 if (likely(OPTION_TS & options)) {
363 if (unlikely(OPTION_SACK_ADVERTISE & options)) {
364 - *ptr++ = htonl((TCPOPT_SACK_PERM << 24) |
365 - (TCPOLEN_SACK_PERM << 16) |
366 - (TCPOPT_TIMESTAMP << 8) |
367 - TCPOLEN_TIMESTAMP);
368 + net_hdr_word(ptr++) =
369 + htonl((TCPOPT_SACK_PERM << 24) |
370 + (TCPOLEN_SACK_PERM << 16) |
371 + (TCPOPT_TIMESTAMP << 8) |
372 + TCPOLEN_TIMESTAMP);
373 options &= ~OPTION_SACK_ADVERTISE;
374 } else {
375 - *ptr++ = htonl((TCPOPT_NOP << 24) |
376 - (TCPOPT_NOP << 16) |
377 - (TCPOPT_TIMESTAMP << 8) |
378 - TCPOLEN_TIMESTAMP);
379 + net_hdr_word(ptr++) =
380 + htonl((TCPOPT_NOP << 24) |
381 + (TCPOPT_NOP << 16) |
382 + (TCPOPT_TIMESTAMP << 8) |
383 + TCPOLEN_TIMESTAMP);
384 }
385 - *ptr++ = htonl(opts->tsval);
386 - *ptr++ = htonl(opts->tsecr);
387 + net_hdr_word(ptr++) = htonl(opts->tsval);
388 + net_hdr_word(ptr++) = htonl(opts->tsecr);
389 }
390
391 if (unlikely(OPTION_SACK_ADVERTISE & options)) {
392 - *ptr++ = htonl((TCPOPT_NOP << 24) |
393 - (TCPOPT_NOP << 16) |
394 - (TCPOPT_SACK_PERM << 8) |
395 - TCPOLEN_SACK_PERM);
396 + net_hdr_word(ptr++) =
397 + htonl((TCPOPT_NOP << 24) |
398 + (TCPOPT_NOP << 16) |
399 + (TCPOPT_SACK_PERM << 8) |
400 + TCPOLEN_SACK_PERM);
401 }
402
403 if (unlikely(OPTION_WSCALE & options)) {
404 - *ptr++ = htonl((TCPOPT_NOP << 24) |
405 - (TCPOPT_WINDOW << 16) |
406 - (TCPOLEN_WINDOW << 8) |
407 - opts->ws);
408 + net_hdr_word(ptr++) =
409 + htonl((TCPOPT_NOP << 24) |
410 + (TCPOPT_WINDOW << 16) |
411 + (TCPOLEN_WINDOW << 8) |
412 + opts->ws);
413 }
414
415 if (unlikely(opts->num_sack_blocks)) {
416 @@ -503,16 +508,17 @@ static void tcp_options_write(__be32 *pt
417 tp->duplicate_sack : tp->selective_acks;
418 int this_sack;
419
420 - *ptr++ = htonl((TCPOPT_NOP << 24) |
421 - (TCPOPT_NOP << 16) |
422 - (TCPOPT_SACK << 8) |
423 - (TCPOLEN_SACK_BASE + (opts->num_sack_blocks *
424 + net_hdr_word(ptr++) =
425 + htonl((TCPOPT_NOP << 24) |
426 + (TCPOPT_NOP << 16) |
427 + (TCPOPT_SACK << 8) |
428 + (TCPOLEN_SACK_BASE + (opts->num_sack_blocks *
429 TCPOLEN_SACK_PERBLOCK)));
430
431 for (this_sack = 0; this_sack < opts->num_sack_blocks;
432 ++this_sack) {
433 - *ptr++ = htonl(sp[this_sack].start_seq);
434 - *ptr++ = htonl(sp[this_sack].end_seq);
435 + net_hdr_word(ptr++) = htonl(sp[this_sack].start_seq);
436 + net_hdr_word(ptr++) = htonl(sp[this_sack].end_seq);
437 }
438
439 tp->rx_opt.dsack = 0;
440 @@ -525,13 +531,14 @@ static void tcp_options_write(__be32 *pt
441
442 if (foc->exp) {
443 len = TCPOLEN_EXP_FASTOPEN_BASE + foc->len;
444 - *ptr = htonl((TCPOPT_EXP << 24) | (len << 16) |
445 + net_hdr_word(ptr) =
446 + htonl((TCPOPT_EXP << 24) | (len << 16) |
447 TCPOPT_FASTOPEN_MAGIC);
448 p += TCPOLEN_EXP_FASTOPEN_BASE;
449 } else {
450 len = TCPOLEN_FASTOPEN_BASE + foc->len;
451 - *p++ = TCPOPT_FASTOPEN;
452 - *p++ = len;
453 + net_hdr_word(p++) = TCPOPT_FASTOPEN;
454 + net_hdr_word(p++) = len;
455 }
456
457 memcpy(p, foc->val, foc->len);
458 --- a/net/ipv4/igmp.c
459 +++ b/net/ipv4/igmp.c
460 @@ -548,7 +548,7 @@ static struct sk_buff *add_grec(struct s
461 if (!skb)
462 return NULL;
463 psrc = skb_put(skb, sizeof(__be32));
464 - *psrc = psf->sf_inaddr;
465 + net_hdr_word(psrc) = psf->sf_inaddr;
466 scount++; stotal++;
467 if ((type == IGMPV3_ALLOW_NEW_SOURCES ||
468 type == IGMPV3_BLOCK_OLD_SOURCES) && psf->sf_crcount) {
469 --- a/include/uapi/linux/igmp.h
470 +++ b/include/uapi/linux/igmp.h
471 @@ -33,7 +33,7 @@ struct igmphdr {
472 __u8 code; /* For newer IGMP */
473 __sum16 csum;
474 __be32 group;
475 -};
476 +} __attribute__((packed, aligned(2)));
477
478 /* V3 group record types [grec_type] */
479 #define IGMPV3_MODE_IS_INCLUDE 1
480 @@ -49,7 +49,7 @@ struct igmpv3_grec {
481 __be16 grec_nsrcs;
482 __be32 grec_mca;
483 __be32 grec_src[0];
484 -};
485 +} __attribute__((packed, aligned(2)));
486
487 struct igmpv3_report {
488 __u8 type;
489 @@ -58,7 +58,7 @@ struct igmpv3_report {
490 __be16 resv2;
491 __be16 ngrec;
492 struct igmpv3_grec grec[0];
493 -};
494 +} __attribute__((packed, aligned(2)));
495
496 struct igmpv3_query {
497 __u8 type;
498 @@ -79,7 +79,7 @@ struct igmpv3_query {
499 __u8 qqic;
500 __be16 nsrcs;
501 __be32 srcs[0];
502 -};
503 +} __attribute__((packed, aligned(2)));
504
505 #define IGMP_HOST_MEMBERSHIP_QUERY 0x11 /* From RFC1112 */
506 #define IGMP_HOST_MEMBERSHIP_REPORT 0x12 /* Ditto */
507 --- a/net/core/flow_dissector.c
508 +++ b/net/core/flow_dissector.c
509 @@ -109,7 +109,7 @@ __be32 __skb_flow_get_ports(const struct
510 ports = __skb_header_pointer(skb, thoff + poff,
511 sizeof(_ports), data, hlen, &_ports);
512 if (ports)
513 - return *ports;
514 + return (__be32)net_hdr_word(ports);
515 }
516
517 return 0;
518 --- a/include/uapi/linux/icmpv6.h
519 +++ b/include/uapi/linux/icmpv6.h
520 @@ -77,7 +77,7 @@ struct icmp6hdr {
521 #define icmp6_addrconf_other icmp6_dataun.u_nd_ra.other
522 #define icmp6_rt_lifetime icmp6_dataun.u_nd_ra.rt_lifetime
523 #define icmp6_router_pref icmp6_dataun.u_nd_ra.router_pref
524 -};
525 +} __attribute__((packed, aligned(2)));
526
527
528 #define ICMPV6_ROUTER_PREF_LOW 0x3
529 --- a/include/net/ndisc.h
530 +++ b/include/net/ndisc.h
531 @@ -89,7 +89,7 @@ struct ra_msg {
532 struct icmp6hdr icmph;
533 __be32 reachable_time;
534 __be32 retrans_timer;
535 -};
536 +} __attribute__((packed, aligned(2)));
537
538 struct rd_msg {
539 struct icmp6hdr icmph;
540 @@ -368,10 +368,10 @@ static inline u32 ndisc_hashfn(const voi
541 {
542 const u32 *p32 = pkey;
543
544 - return (((p32[0] ^ hash32_ptr(dev)) * hash_rnd[0]) +
545 - (p32[1] * hash_rnd[1]) +
546 - (p32[2] * hash_rnd[2]) +
547 - (p32[3] * hash_rnd[3]));
548 + return (((net_hdr_word(&p32[0]) ^ hash32_ptr(dev)) * hash_rnd[0]) +
549 + (net_hdr_word(&p32[1]) * hash_rnd[1]) +
550 + (net_hdr_word(&p32[2]) * hash_rnd[2]) +
551 + (net_hdr_word(&p32[3]) * hash_rnd[3]));
552 }
553
554 static inline struct neighbour *__ipv6_neigh_lookup_noref(struct net_device *dev, const void *pkey)
555 --- a/net/sched/cls_u32.c
556 +++ b/net/sched/cls_u32.c
557 @@ -165,7 +165,7 @@ next_knode:
558 data = skb_header_pointer(skb, toff, 4, &hdata);
559 if (!data)
560 goto out;
561 - if ((*data ^ key->val) & key->mask) {
562 + if ((net_hdr_word(data) ^ key->val) & key->mask) {
563 n = rcu_dereference_bh(n->next);
564 goto next_knode;
565 }
566 @@ -218,8 +218,8 @@ check_terminal:
567 &hdata);
568 if (!data)
569 goto out;
570 - sel = ht->divisor & u32_hash_fold(*data, &n->sel,
571 - n->fshift);
572 + sel = ht->divisor & u32_hash_fold(net_hdr_word(data),
573 + &n->sel, n->fshift);
574 }
575 if (!(n->sel.flags & (TC_U32_VAROFFSET | TC_U32_OFFSET | TC_U32_EAT)))
576 goto next_ht;
577 --- a/net/ipv6/ip6_offload.c
578 +++ b/net/ipv6/ip6_offload.c
579 @@ -221,7 +221,7 @@ static struct sk_buff **ipv6_gro_receive
580 continue;
581
582 iph2 = (struct ipv6hdr *)(p->data + off);
583 - first_word = *(__be32 *)iph ^ *(__be32 *)iph2;
584 + first_word = net_hdr_word(iph) ^ net_hdr_word(iph2);
585
586 /* All fields must match except length and Traffic Class.
587 * XXX skbs on the gro_list have all been parsed and pulled
588 --- a/include/net/addrconf.h
589 +++ b/include/net/addrconf.h
590 @@ -47,7 +47,7 @@ struct prefix_info {
591 __be32 reserved2;
592
593 struct in6_addr prefix;
594 -};
595 +} __attribute__((packed, aligned(2)));
596
597 #include <linux/netdevice.h>
598 #include <net/if_inet6.h>
599 --- a/include/net/inet_ecn.h
600 +++ b/include/net/inet_ecn.h
601 @@ -125,9 +125,9 @@ static inline int IP6_ECN_set_ce(struct
602 if (INET_ECN_is_not_ect(ipv6_get_dsfield(iph)))
603 return 0;
604
605 - from = *(__be32 *)iph;
606 + from = net_hdr_word(iph);
607 to = from | htonl(INET_ECN_CE << 20);
608 - *(__be32 *)iph = to;
609 + net_hdr_word(iph) = to;
610 if (skb->ip_summed == CHECKSUM_COMPLETE)
611 skb->csum = csum_add(csum_sub(skb->csum, (__force __wsum)from),
612 (__force __wsum)to);
613 @@ -136,7 +136,7 @@ static inline int IP6_ECN_set_ce(struct
614
615 static inline void IP6_ECN_clear(struct ipv6hdr *iph)
616 {
617 - *(__be32*)iph &= ~htonl(INET_ECN_MASK << 20);
618 + net_hdr_word(iph) &= ~htonl(INET_ECN_MASK << 20);
619 }
620
621 static inline void ipv6_copy_dscp(unsigned int dscp, struct ipv6hdr *inner)
622 --- a/include/net/ipv6.h
623 +++ b/include/net/ipv6.h
624 @@ -108,7 +108,7 @@ struct frag_hdr {
625 __u8 reserved;
626 __be16 frag_off;
627 __be32 identification;
628 -};
629 +} __attribute__((packed, aligned(2)));
630
631 #define IP6_MF 0x0001
632 #define IP6_OFFSET 0xFFF8
633 @@ -437,8 +437,8 @@ static inline void __ipv6_addr_set_half(
634 }
635 #endif
636 #endif
637 - addr[0] = wh;
638 - addr[1] = wl;
639 + net_hdr_word(&addr[0]) = wh;
640 + net_hdr_word(&addr[1]) = wl;
641 }
642
643 static inline void ipv6_addr_set(struct in6_addr *addr,
644 @@ -497,6 +497,8 @@ static inline bool ipv6_prefix_equal(con
645 const __be32 *a1 = addr1->s6_addr32;
646 const __be32 *a2 = addr2->s6_addr32;
647 unsigned int pdw, pbi;
648 + /* Used for last <32-bit fraction of prefix */
649 + u32 pbia1, pbia2;
650
651 /* check complete u32 in prefix */
652 pdw = prefixlen >> 5;
653 @@ -505,7 +507,9 @@ static inline bool ipv6_prefix_equal(con
654
655 /* check incomplete u32 in prefix */
656 pbi = prefixlen & 0x1f;
657 - if (pbi && ((a1[pdw] ^ a2[pdw]) & htonl((0xffffffff) << (32 - pbi))))
658 + pbia1 = net_hdr_word(&a1[pdw]);
659 + pbia2 = net_hdr_word(&a2[pdw]);
660 + if (pbi && ((pbia1 ^ pbia2) & htonl((0xffffffff) << (32 - pbi))))
661 return false;
662
663 return true;
664 @@ -605,13 +609,13 @@ static inline void ipv6_addr_set_v4mappe
665 */
666 static inline int __ipv6_addr_diff32(const void *token1, const void *token2, int addrlen)
667 {
668 - const __be32 *a1 = token1, *a2 = token2;
669 + const struct in6_addr *a1 = token1, *a2 = token2;
670 int i;
671
672 addrlen >>= 2;
673
674 for (i = 0; i < addrlen; i++) {
675 - __be32 xb = a1[i] ^ a2[i];
676 + __be32 xb = a1->s6_addr32[i] ^ a2->s6_addr32[i];
677 if (xb)
678 return i * 32 + 31 - __fls(ntohl(xb));
679 }
680 @@ -780,17 +784,18 @@ static inline int ip6_default_np_autolab
681 static inline void ip6_flow_hdr(struct ipv6hdr *hdr, unsigned int tclass,
682 __be32 flowlabel)
683 {
684 - *(__be32 *)hdr = htonl(0x60000000 | (tclass << 20)) | flowlabel;
685 + net_hdr_word((__be32 *)hdr) =
686 + htonl(0x60000000 | (tclass << 20)) | flowlabel;
687 }
688
689 static inline __be32 ip6_flowinfo(const struct ipv6hdr *hdr)
690 {
691 - return *(__be32 *)hdr & IPV6_FLOWINFO_MASK;
692 + return net_hdr_word((__be32 *)hdr) & IPV6_FLOWINFO_MASK;
693 }
694
695 static inline __be32 ip6_flowlabel(const struct ipv6hdr *hdr)
696 {
697 - return *(__be32 *)hdr & IPV6_FLOWLABEL_MASK;
698 + return net_hdr_word((__be32 *)hdr) & IPV6_FLOWLABEL_MASK;
699 }
700
701 static inline u8 ip6_tclass(__be32 flowinfo)
702 --- a/include/net/secure_seq.h
703 +++ b/include/net/secure_seq.h
704 @@ -3,6 +3,7 @@
705 #define _NET_SECURE_SEQ
706
707 #include <linux/types.h>
708 +#include <linux/in6.h>
709
710 u32 secure_ipv4_port_ephemeral(__be32 saddr, __be32 daddr, __be16 dport);
711 u32 secure_ipv6_port_ephemeral(const __be32 *saddr, const __be32 *daddr,
712 --- a/include/uapi/linux/in.h
713 +++ b/include/uapi/linux/in.h
714 @@ -84,7 +84,7 @@ enum {
715 /* Internet address. */
716 struct in_addr {
717 __be32 s_addr;
718 -};
719 +} __attribute__((packed, aligned(2)));
720 #endif
721
722 #define IP_TOS 1
723 --- a/net/ipv6/ip6_fib.c
724 +++ b/net/ipv6/ip6_fib.c
725 @@ -137,7 +137,7 @@ static __be32 addr_bit_set(const void *t
726 * See include/asm-generic/bitops/le.h.
727 */
728 return (__force __be32)(1 << ((~fn_bit ^ BITOP_BE32_SWIZZLE) & 0x1f)) &
729 - addr[fn_bit >> 5];
730 + net_hdr_word(&addr[fn_bit >> 5]);
731 }
732
733 static struct fib6_node *node_alloc(void)
734 --- a/net/netfilter/nf_conntrack_proto_tcp.c
735 +++ b/net/netfilter/nf_conntrack_proto_tcp.c
736 @@ -447,7 +447,7 @@ static void tcp_sack(const struct sk_buf
737
738 /* Fast path for timestamp-only option */
739 if (length == TCPOLEN_TSTAMP_ALIGNED
740 - && *(__be32 *)ptr == htonl((TCPOPT_NOP << 24)
741 + && net_hdr_word(ptr) == htonl((TCPOPT_NOP << 24)
742 | (TCPOPT_NOP << 16)
743 | (TCPOPT_TIMESTAMP << 8)
744 | TCPOLEN_TIMESTAMP))
745 --- a/net/xfrm/xfrm_input.c
746 +++ b/net/xfrm/xfrm_input.c
747 @@ -193,8 +193,8 @@ int xfrm_parse_spi(struct sk_buff *skb,
748 if (!pskb_may_pull(skb, hlen))
749 return -EINVAL;
750
751 - *spi = *(__be32 *)(skb_transport_header(skb) + offset);
752 - *seq = *(__be32 *)(skb_transport_header(skb) + offset_seq);
753 + *spi = net_hdr_word(skb_transport_header(skb) + offset);
754 + *seq = net_hdr_word(skb_transport_header(skb) + offset_seq);
755 return 0;
756 }
757 EXPORT_SYMBOL(xfrm_parse_spi);
758 --- a/net/ipv4/tcp_input.c
759 +++ b/net/ipv4/tcp_input.c
760 @@ -3874,14 +3874,16 @@ static bool tcp_parse_aligned_timestamp(
761 {
762 const __be32 *ptr = (const __be32 *)(th + 1);
763
764 - if (*ptr == htonl((TCPOPT_NOP << 24) | (TCPOPT_NOP << 16)
765 - | (TCPOPT_TIMESTAMP << 8) | TCPOLEN_TIMESTAMP)) {
766 + if (net_hdr_word(ptr) ==
767 + htonl((TCPOPT_NOP << 24) | (TCPOPT_NOP << 16) |
768 + (TCPOPT_TIMESTAMP << 8) | TCPOLEN_TIMESTAMP)) {
769 tp->rx_opt.saw_tstamp = 1;
770 ++ptr;
771 - tp->rx_opt.rcv_tsval = ntohl(*ptr);
772 + tp->rx_opt.rcv_tsval = get_unaligned_be32(ptr);
773 ++ptr;
774 - if (*ptr)
775 - tp->rx_opt.rcv_tsecr = ntohl(*ptr) - tp->tsoffset;
776 + if (net_hdr_word(ptr))
777 + tp->rx_opt.rcv_tsecr = get_unaligned_be32(ptr) -
778 + tp->tsoffset;
779 else
780 tp->rx_opt.rcv_tsecr = 0;
781 return true;
782 --- a/include/uapi/linux/if_pppox.h
783 +++ b/include/uapi/linux/if_pppox.h
784 @@ -51,6 +51,7 @@ struct pppoe_addr {
785 */
786 struct pptp_addr {
787 __u16 call_id;
788 + __u16 pad;
789 struct in_addr sin_addr;
790 };
791
792 --- a/net/ipv6/netfilter/nf_log_ipv6.c
793 +++ b/net/ipv6/netfilter/nf_log_ipv6.c
794 @@ -66,9 +66,9 @@ static void dump_ipv6_packet(struct nf_l
795 /* Max length: 44 "LEN=65535 TC=255 HOPLIMIT=255 FLOWLBL=FFFFF " */
796 nf_log_buf_add(m, "LEN=%zu TC=%u HOPLIMIT=%u FLOWLBL=%u ",
797 ntohs(ih->payload_len) + sizeof(struct ipv6hdr),
798 - (ntohl(*(__be32 *)ih) & 0x0ff00000) >> 20,
799 + (ntohl(net_hdr_word(ih)) & 0x0ff00000) >> 20,
800 ih->hop_limit,
801 - (ntohl(*(__be32 *)ih) & 0x000fffff));
802 + (ntohl(net_hdr_word(ih)) & 0x000fffff));
803
804 fragment = 0;
805 ptr = ip6hoff + sizeof(struct ipv6hdr);
806 --- a/include/net/neighbour.h
807 +++ b/include/net/neighbour.h
808 @@ -265,8 +265,10 @@ static inline bool neigh_key_eq128(const
809 const u32 *n32 = (const u32 *)n->primary_key;
810 const u32 *p32 = pkey;
811
812 - return ((n32[0] ^ p32[0]) | (n32[1] ^ p32[1]) |
813 - (n32[2] ^ p32[2]) | (n32[3] ^ p32[3])) == 0;
814 + return ((n32[0] ^ net_hdr_word(&p32[0])) |
815 + (n32[1] ^ net_hdr_word(&p32[1])) |
816 + (n32[2] ^ net_hdr_word(&p32[2])) |
817 + (n32[3] ^ net_hdr_word(&p32[3]))) == 0;
818 }
819
820 static inline struct neighbour *___neigh_lookup_noref(
821 --- a/include/uapi/linux/netfilter_arp/arp_tables.h
822 +++ b/include/uapi/linux/netfilter_arp/arp_tables.h
823 @@ -70,7 +70,7 @@ struct arpt_arp {
824 __u8 flags;
825 /* Inverse flags */
826 __u16 invflags;
827 -};
828 +} __attribute__((aligned(4)));
829
830 /* Values for "flag" field in struct arpt_ip (general arp structure).
831 * No flags defined yet.
832 --- a/net/core/utils.c
833 +++ b/net/core/utils.c
834 @@ -424,8 +424,14 @@ void inet_proto_csum_replace16(__sum16 *
835 bool pseudohdr)
836 {
837 __be32 diff[] = {
838 - ~from[0], ~from[1], ~from[2], ~from[3],
839 - to[0], to[1], to[2], to[3],
840 + ~net_hdr_word(&from[0]),
841 + ~net_hdr_word(&from[1]),
842 + ~net_hdr_word(&from[2]),
843 + ~net_hdr_word(&from[3]),
844 + net_hdr_word(&to[0]),
845 + net_hdr_word(&to[1]),
846 + net_hdr_word(&to[2]),
847 + net_hdr_word(&to[3]),
848 };
849 if (skb->ip_summed != CHECKSUM_PARTIAL) {
850 *sum = csum_fold(csum_partial(diff, sizeof(diff),
851 --- a/drivers/net/vxlan.c
852 +++ b/drivers/net/vxlan.c
853 @@ -1868,15 +1868,15 @@ static int vxlan_build_skb(struct sk_buf
854 return err;
855
856 vxh = __skb_push(skb, sizeof(*vxh));
857 - vxh->vx_flags = VXLAN_HF_VNI;
858 - vxh->vx_vni = vxlan_vni_field(vni);
859 + net_hdr_word(&vxh->vx_flags) = VXLAN_HF_VNI;
860 + net_hdr_word(&vxh->vx_vni) = vxlan_vni_field(vni);
861
862 if (type & SKB_GSO_TUNNEL_REMCSUM) {
863 unsigned int start;
864
865 start = skb_checksum_start_offset(skb) - sizeof(struct vxlanhdr);
866 - vxh->vx_vni |= vxlan_compute_rco(start, skb->csum_offset);
867 - vxh->vx_flags |= VXLAN_HF_RCO;
868 + net_hdr_word(&vxh->vx_vni) |= vxlan_compute_rco(start, skb->csum_offset);
869 + net_hdr_word(&vxh->vx_flags) |= VXLAN_HF_RCO;
870
871 if (!skb_is_gso(skb)) {
872 skb->ip_summed = CHECKSUM_NONE;
873 --- a/include/linux/etherdevice.h
874 +++ b/include/linux/etherdevice.h
875 @@ -480,7 +480,7 @@ static inline bool is_etherdev_addr(cons
876 * @b: Pointer to Ethernet header
877 *
878 * Compare two Ethernet headers, returns 0 if equal.
879 - * This assumes that the network header (i.e., IP header) is 4-byte
880 + * This assumes that the network header (i.e., IP header) is 2-byte
881 * aligned OR the platform can handle unaligned access. This is the
882 * case for all packets coming into netif_receive_skb or similar
883 * entry points.
884 @@ -503,11 +503,12 @@ static inline unsigned long compare_ethe
885 fold |= *(unsigned long *)(a + 6) ^ *(unsigned long *)(b + 6);
886 return fold;
887 #else
888 - u32 *a32 = (u32 *)((u8 *)a + 2);
889 - u32 *b32 = (u32 *)((u8 *)b + 2);
890 + const u16 *a16 = a;
891 + const u16 *b16 = b;
892
893 - return (*(u16 *)a ^ *(u16 *)b) | (a32[0] ^ b32[0]) |
894 - (a32[1] ^ b32[1]) | (a32[2] ^ b32[2]);
895 + return (a16[0] ^ b16[0]) | (a16[1] ^ b16[1]) | (a16[2] ^ b16[2]) |
896 + (a16[3] ^ b16[3]) | (a16[4] ^ b16[4]) | (a16[5] ^ b16[5]) |
897 + (a16[6] ^ b16[6]);
898 #endif
899 }
900
901 --- a/net/ipv4/tcp_offload.c
902 +++ b/net/ipv4/tcp_offload.c
903 @@ -226,7 +226,7 @@ struct sk_buff **tcp_gro_receive(struct
904
905 th2 = tcp_hdr(p);
906
907 - if (*(u32 *)&th->source ^ *(u32 *)&th2->source) {
908 + if (net_hdr_word(&th->source) ^ net_hdr_word(&th2->source)) {
909 NAPI_GRO_CB(p)->same_flow = 0;
910 continue;
911 }
912 @@ -244,8 +244,8 @@ found:
913 ~(TCP_FLAG_CWR | TCP_FLAG_FIN | TCP_FLAG_PSH));
914 flush |= (__force int)(th->ack_seq ^ th2->ack_seq);
915 for (i = sizeof(*th); i < thlen; i += 4)
916 - flush |= *(u32 *)((u8 *)th + i) ^
917 - *(u32 *)((u8 *)th2 + i);
918 + flush |= net_hdr_word((u8 *)th + i) ^
919 + net_hdr_word((u8 *)th2 + i);
920
921 /* When we receive our second frame we can made a decision on if we
922 * continue this flow as an atomic flow with a fixed ID or if we use
923 --- a/net/ipv6/netfilter/ip6table_mangle.c
924 +++ b/net/ipv6/netfilter/ip6table_mangle.c
925 @@ -50,7 +50,7 @@ ip6t_mangle_out(struct sk_buff *skb, con
926 hop_limit = ipv6_hdr(skb)->hop_limit;
927
928 /* flowlabel and prio (includes version, which shouldn't change either */
929 - flowlabel = *((u_int32_t *)ipv6_hdr(skb));
930 + flowlabel = net_hdr_word(ipv6_hdr(skb));
931
932 ret = ip6t_do_table(skb, state, state->net->ipv6.ip6table_mangle);
933
934 @@ -59,7 +59,7 @@ ip6t_mangle_out(struct sk_buff *skb, con
935 !ipv6_addr_equal(&ipv6_hdr(skb)->daddr, &daddr) ||
936 skb->mark != mark ||
937 ipv6_hdr(skb)->hop_limit != hop_limit ||
938 - flowlabel != *((u_int32_t *)ipv6_hdr(skb)))) {
939 + flowlabel != net_hdr_word(ipv6_hdr(skb)))) {
940 err = ip6_route_me_harder(state->net, skb);
941 if (err < 0)
942 ret = NF_DROP_ERR(err);
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