[linux-stable-rc:linux-4.9.y 1600/2151] net/sched/cls_api.c:272:9: warning: unused variable 'name'

From: kernel test robot
Date: Mon Jun 27 2022 - 15:47:54 EST

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tree: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-4.9.y
head: e807fcde67db3005d9e23498ad56d0136708298b
commit: 2b29404f4eea7da878a8a8c5b301d9adf6f56d55 [1600/2151] net: sched: prevent UAF on tc_ctl_tfilter when temporarily dropping rtnl_lock
config: i386-buildonly-randconfig-r006-20220627 (https://download.01.org/0day-ci/archive/20220628/202206280318.h76sjHoX-lkp@xxxxxxxxx/config)
compiler: gcc-7 (Ubuntu 7.5.0-6ubuntu2) 7.5.0
reproduce (this is a W=1 build):
# https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git/commit/?id=2b29404f4eea7da878a8a8c5b301d9adf6f56d55
git remote add linux-stable-rc https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git
git fetch --no-tags linux-stable-rc linux-4.9.y
git checkout 2b29404f4eea7da878a8a8c5b301d9adf6f56d55
# save the config file
mkdir build_dir && cp config build_dir/.config
make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash net/sched/

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@xxxxxxxxx>

All warnings (new ones prefixed by >>):

net/sched/cls_api.c: In function 'tc_ctl_tfilter':
>> net/sched/cls_api.c:272:9: warning: unused variable 'name' [-Wunused-variable]
char name[IFNAMSIZ];
^~~~
>> net/sched/cls_api.c:271:19: warning: unused variable 'kind' [-Wunused-variable]
struct nlattr *kind = tca[TCA_KIND];
^~~~

vim +/name +272 net/sched/cls_api.c

^1da177e4c3f41 Linus Torvalds 2005-04-16 131
661d2967b3f1b3 Thomas Graf 2013-03-21 132 static int tc_ctl_tfilter(struct sk_buff *skb, struct nlmsghdr *n)
^1da177e4c3f41 Linus Torvalds 2005-04-16 133 {
3b1e0a655f8eba YOSHIFUJI Hideaki 2008-03-26 134 struct net *net = sock_net(skb->sk);
add93b610a4e66 Patrick McHardy 2008-01-22 135 struct nlattr *tca[TCA_MAX + 1];
^1da177e4c3f41 Linus Torvalds 2005-04-16 136 struct tcmsg *t;
^1da177e4c3f41 Linus Torvalds 2005-04-16 137 u32 protocol;
^1da177e4c3f41 Linus Torvalds 2005-04-16 138 u32 prio;
^1da177e4c3f41 Linus Torvalds 2005-04-16 139 u32 nprio;
^1da177e4c3f41 Linus Torvalds 2005-04-16 140 u32 parent;
^1da177e4c3f41 Linus Torvalds 2005-04-16 141 struct net_device *dev;
^1da177e4c3f41 Linus Torvalds 2005-04-16 142 struct Qdisc *q;
25d8c0d55f241c John Fastabend 2014-09-12 143 struct tcf_proto __rcu **back;
25d8c0d55f241c John Fastabend 2014-09-12 144 struct tcf_proto __rcu **chain;
^1da177e4c3f41 Linus Torvalds 2005-04-16 145 struct tcf_proto *tp;
dc7f9f6e883855 Eric Dumazet 2011-07-05 146 const struct tcf_proto_ops *tp_ops;
20fea08b5fb639 Eric Dumazet 2007-11-14 147 const struct Qdisc_class_ops *cops;
^1da177e4c3f41 Linus Torvalds 2005-04-16 148 unsigned long cl;
^1da177e4c3f41 Linus Torvalds 2005-04-16 149 unsigned long fh;
^1da177e4c3f41 Linus Torvalds 2005-04-16 150 int err;
09babe4ce12ef1 Daniel Borkmann 2016-12-21 151 int tp_created;
^1da177e4c3f41 Linus Torvalds 2005-04-16 152
4e8bbb819d1594 Stéphane Graber 2014-04-30 153 if ((n->nlmsg_type != RTM_GETTFILTER) &&
5f013c9bc70214 David S. Miller 2014-05-12 154 !netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN))
dfc47ef8639fac Eric W. Biederman 2012-11-16 155 return -EPERM;
de179c8c12e9e5 Hong zhi guo 2013-03-25 156
^1da177e4c3f41 Linus Torvalds 2005-04-16 157 replay:
09babe4ce12ef1 Daniel Borkmann 2016-12-21 158 tp_created = 0;
09babe4ce12ef1 Daniel Borkmann 2016-12-21 159
de179c8c12e9e5 Hong zhi guo 2013-03-25 160 err = nlmsg_parse(n, sizeof(*t), tca, TCA_MAX, NULL);
de179c8c12e9e5 Hong zhi guo 2013-03-25 161 if (err < 0)
de179c8c12e9e5 Hong zhi guo 2013-03-25 162 return err;
de179c8c12e9e5 Hong zhi guo 2013-03-25 163
942b81653a5252 David S. Miller 2012-06-26 164 t = nlmsg_data(n);
^1da177e4c3f41 Linus Torvalds 2005-04-16 165 protocol = TC_H_MIN(t->tcm_info);
^1da177e4c3f41 Linus Torvalds 2005-04-16 166 prio = TC_H_MAJ(t->tcm_info);
^1da177e4c3f41 Linus Torvalds 2005-04-16 167 nprio = prio;
^1da177e4c3f41 Linus Torvalds 2005-04-16 168 parent = t->tcm_parent;
^1da177e4c3f41 Linus Torvalds 2005-04-16 169 cl = 0;
^1da177e4c3f41 Linus Torvalds 2005-04-16 170
^1da177e4c3f41 Linus Torvalds 2005-04-16 171 if (prio == 0) {
ea7f8277f9076d Daniel Borkmann 2016-06-10 172 switch (n->nlmsg_type) {
ea7f8277f9076d Daniel Borkmann 2016-06-10 173 case RTM_DELTFILTER:
9f6ed032cd951d Daniel Borkmann 2016-06-16 174 if (protocol || t->tcm_handle || tca[TCA_KIND])
^1da177e4c3f41 Linus Torvalds 2005-04-16 175 return -ENOENT;
ea7f8277f9076d Daniel Borkmann 2016-06-10 176 break;
ea7f8277f9076d Daniel Borkmann 2016-06-10 177 case RTM_NEWTFILTER:
ea7f8277f9076d Daniel Borkmann 2016-06-10 178 /* If no priority is provided by the user,
ea7f8277f9076d Daniel Borkmann 2016-06-10 179 * we allocate one.
ea7f8277f9076d Daniel Borkmann 2016-06-10 180 */
ea7f8277f9076d Daniel Borkmann 2016-06-10 181 if (n->nlmsg_flags & NLM_F_CREATE) {
^1da177e4c3f41 Linus Torvalds 2005-04-16 182 prio = TC_H_MAKE(0x80000000U, 0U);
ea7f8277f9076d Daniel Borkmann 2016-06-10 183 break;
ea7f8277f9076d Daniel Borkmann 2016-06-10 184 }
ea7f8277f9076d Daniel Borkmann 2016-06-10 185 /* fall-through */
ea7f8277f9076d Daniel Borkmann 2016-06-10 186 default:
ea7f8277f9076d Daniel Borkmann 2016-06-10 187 return -ENOENT;
ea7f8277f9076d Daniel Borkmann 2016-06-10 188 }
^1da177e4c3f41 Linus Torvalds 2005-04-16 189 }
^1da177e4c3f41 Linus Torvalds 2005-04-16 190
^1da177e4c3f41 Linus Torvalds 2005-04-16 191 /* Find head of filter chain. */
^1da177e4c3f41 Linus Torvalds 2005-04-16 192
^1da177e4c3f41 Linus Torvalds 2005-04-16 193 /* Find link */
7316ae88c43d47 Tom Goff 2010-03-19 194 dev = __dev_get_by_index(net, t->tcm_ifindex);
aa767bfea48289 Stephen Hemminger 2008-01-21 195 if (dev == NULL)
^1da177e4c3f41 Linus Torvalds 2005-04-16 196 return -ENODEV;
^1da177e4c3f41 Linus Torvalds 2005-04-16 197
^1da177e4c3f41 Linus Torvalds 2005-04-16 198 /* Find qdisc */
^1da177e4c3f41 Linus Torvalds 2005-04-16 199 if (!parent) {
af356afa010f3c Patrick McHardy 2009-09-04 200 q = dev->qdisc;
^1da177e4c3f41 Linus Torvalds 2005-04-16 201 parent = q->handle;
aa767bfea48289 Stephen Hemminger 2008-01-21 202 } else {
aa767bfea48289 Stephen Hemminger 2008-01-21 203 q = qdisc_lookup(dev, TC_H_MAJ(t->tcm_parent));
aa767bfea48289 Stephen Hemminger 2008-01-21 204 if (q == NULL)
^1da177e4c3f41 Linus Torvalds 2005-04-16 205 return -EINVAL;
aa767bfea48289 Stephen Hemminger 2008-01-21 206 }
^1da177e4c3f41 Linus Torvalds 2005-04-16 207
^1da177e4c3f41 Linus Torvalds 2005-04-16 208 /* Is it classful? */
cc7ec456f82da7 Eric Dumazet 2011-01-19 209 cops = q->ops->cl_ops;
cc7ec456f82da7 Eric Dumazet 2011-01-19 210 if (!cops)
^1da177e4c3f41 Linus Torvalds 2005-04-16 211 return -EINVAL;
^1da177e4c3f41 Linus Torvalds 2005-04-16 212
71ebe5e9194739 Patrick McHardy 2009-09-04 213 if (cops->tcf_chain == NULL)
71ebe5e9194739 Patrick McHardy 2009-09-04 214 return -EOPNOTSUPP;
71ebe5e9194739 Patrick McHardy 2009-09-04 215
^1da177e4c3f41 Linus Torvalds 2005-04-16 216 /* Do we search for filter, attached to class? */
^1da177e4c3f41 Linus Torvalds 2005-04-16 217 if (TC_H_MIN(parent)) {
^1da177e4c3f41 Linus Torvalds 2005-04-16 218 cl = cops->get(q, parent);
^1da177e4c3f41 Linus Torvalds 2005-04-16 219 if (cl == 0)
^1da177e4c3f41 Linus Torvalds 2005-04-16 220 return -ENOENT;
^1da177e4c3f41 Linus Torvalds 2005-04-16 221 }
^1da177e4c3f41 Linus Torvalds 2005-04-16 222
^1da177e4c3f41 Linus Torvalds 2005-04-16 223 /* And the last stroke */
^1da177e4c3f41 Linus Torvalds 2005-04-16 224 chain = cops->tcf_chain(q, cl);
^1da177e4c3f41 Linus Torvalds 2005-04-16 225 err = -EINVAL;
^1da177e4c3f41 Linus Torvalds 2005-04-16 226 if (chain == NULL)
^1da177e4c3f41 Linus Torvalds 2005-04-16 227 goto errout;
ea7f8277f9076d Daniel Borkmann 2016-06-10 228 if (n->nlmsg_type == RTM_DELTFILTER && prio == 0) {
ea7f8277f9076d Daniel Borkmann 2016-06-10 229 tfilter_notify_chain(net, skb, n, chain, RTM_DELTFILTER);
ea7f8277f9076d Daniel Borkmann 2016-06-10 230 tcf_destroy_chain(chain);
ea7f8277f9076d Daniel Borkmann 2016-06-10 231 err = 0;
ea7f8277f9076d Daniel Borkmann 2016-06-10 232 goto errout;
ea7f8277f9076d Daniel Borkmann 2016-06-10 233 }
^1da177e4c3f41 Linus Torvalds 2005-04-16 234
^1da177e4c3f41 Linus Torvalds 2005-04-16 235 /* Check the chain for existence of proto-tcf with this priority */
25d8c0d55f241c John Fastabend 2014-09-12 236 for (back = chain;
25d8c0d55f241c John Fastabend 2014-09-12 237 (tp = rtnl_dereference(*back)) != NULL;
25d8c0d55f241c John Fastabend 2014-09-12 238 back = &tp->next) {
^1da177e4c3f41 Linus Torvalds 2005-04-16 239 if (tp->prio >= prio) {
^1da177e4c3f41 Linus Torvalds 2005-04-16 240 if (tp->prio == prio) {
cc7ec456f82da7 Eric Dumazet 2011-01-19 241 if (!nprio ||
cc7ec456f82da7 Eric Dumazet 2011-01-19 242 (tp->protocol != protocol && protocol))
^1da177e4c3f41 Linus Torvalds 2005-04-16 243 goto errout;
^1da177e4c3f41 Linus Torvalds 2005-04-16 244 } else
^1da177e4c3f41 Linus Torvalds 2005-04-16 245 tp = NULL;
^1da177e4c3f41 Linus Torvalds 2005-04-16 246 break;
^1da177e4c3f41 Linus Torvalds 2005-04-16 247 }
^1da177e4c3f41 Linus Torvalds 2005-04-16 248 }
^1da177e4c3f41 Linus Torvalds 2005-04-16 249
^1da177e4c3f41 Linus Torvalds 2005-04-16 250 if (tp == NULL) {
^1da177e4c3f41 Linus Torvalds 2005-04-16 251 /* Proto-tcf does not exist, create new one */
^1da177e4c3f41 Linus Torvalds 2005-04-16 252
add93b610a4e66 Patrick McHardy 2008-01-22 253 if (tca[TCA_KIND] == NULL || !protocol)
^1da177e4c3f41 Linus Torvalds 2005-04-16 254 goto errout;
^1da177e4c3f41 Linus Torvalds 2005-04-16 255
^1da177e4c3f41 Linus Torvalds 2005-04-16 256 err = -ENOENT;
cc7ec456f82da7 Eric Dumazet 2011-01-19 257 if (n->nlmsg_type != RTM_NEWTFILTER ||
cc7ec456f82da7 Eric Dumazet 2011-01-19 258 !(n->nlmsg_flags & NLM_F_CREATE))
^1da177e4c3f41 Linus Torvalds 2005-04-16 259 goto errout;
^1da177e4c3f41 Linus Torvalds 2005-04-16 260
^1da177e4c3f41 Linus Torvalds 2005-04-16 261
^1da177e4c3f41 Linus Torvalds 2005-04-16 262 /* Create new proto tcf */
^1da177e4c3f41 Linus Torvalds 2005-04-16 263
^1da177e4c3f41 Linus Torvalds 2005-04-16 264 err = -ENOBUFS;
aa767bfea48289 Stephen Hemminger 2008-01-21 265 tp = kzalloc(sizeof(*tp), GFP_KERNEL);
aa767bfea48289 Stephen Hemminger 2008-01-21 266 if (tp == NULL)
^1da177e4c3f41 Linus Torvalds 2005-04-16 267 goto errout;
f2df824948d559 Patrick McHardy 2008-05-20 268 err = -ENOENT;
add93b610a4e66 Patrick McHardy 2008-01-22 269 tp_ops = tcf_proto_lookup_ops(tca[TCA_KIND]);
^1da177e4c3f41 Linus Torvalds 2005-04-16 270 if (tp_ops == NULL) {
add93b610a4e66 Patrick McHardy 2008-01-22 @271 struct nlattr *kind = tca[TCA_KIND];
^1da177e4c3f41 Linus Torvalds 2005-04-16 @272 char name[IFNAMSIZ];
^1da177e4c3f41 Linus Torvalds 2005-04-16 273
2b29404f4eea7d Thadeu Lima de Souza Cascardo 2022-05-02 274 if (cl)
2b29404f4eea7d Thadeu Lima de Souza Cascardo 2022-05-02 275 cops->put(q, cl);
2b29404f4eea7d Thadeu Lima de Souza Cascardo 2022-05-02 276 cl = 0;
2b29404f4eea7d Thadeu Lima de Souza Cascardo 2022-05-02 277 #ifdef CONFIG_MODULES
^1da177e4c3f41 Linus Torvalds 2005-04-16 278 if (kind != NULL &&
add93b610a4e66 Patrick McHardy 2008-01-22 279 nla_strlcpy(name, kind, IFNAMSIZ) < IFNAMSIZ) {
^1da177e4c3f41 Linus Torvalds 2005-04-16 280 rtnl_unlock();
^1da177e4c3f41 Linus Torvalds 2005-04-16 281 request_module("cls_%s", name);
^1da177e4c3f41 Linus Torvalds 2005-04-16 282 rtnl_lock();
^1da177e4c3f41 Linus Torvalds 2005-04-16 283 tp_ops = tcf_proto_lookup_ops(kind);
^1da177e4c3f41 Linus Torvalds 2005-04-16 284 /* We dropped the RTNL semaphore in order to
^1da177e4c3f41 Linus Torvalds 2005-04-16 285 * perform the module load. So, even if we
^1da177e4c3f41 Linus Torvalds 2005-04-16 286 * succeeded in loading the module we have to
^1da177e4c3f41 Linus Torvalds 2005-04-16 287 * replay the request. We indicate this using
^1da177e4c3f41 Linus Torvalds 2005-04-16 288 * -EAGAIN.
^1da177e4c3f41 Linus Torvalds 2005-04-16 289 */
^1da177e4c3f41 Linus Torvalds 2005-04-16 290 if (tp_ops != NULL) {
^1da177e4c3f41 Linus Torvalds 2005-04-16 291 module_put(tp_ops->owner);
^1da177e4c3f41 Linus Torvalds 2005-04-16 292 err = -EAGAIN;
^1da177e4c3f41 Linus Torvalds 2005-04-16 293 }
^1da177e4c3f41 Linus Torvalds 2005-04-16 294 }
^1da177e4c3f41 Linus Torvalds 2005-04-16 295 #endif
^1da177e4c3f41 Linus Torvalds 2005-04-16 296 kfree(tp);
^1da177e4c3f41 Linus Torvalds 2005-04-16 297 goto errout;
^1da177e4c3f41 Linus Torvalds 2005-04-16 298 }
^1da177e4c3f41 Linus Torvalds 2005-04-16 299 tp->ops = tp_ops;
^1da177e4c3f41 Linus Torvalds 2005-04-16 300 tp->protocol = protocol;
25d8c0d55f241c John Fastabend 2014-09-12 301 tp->prio = nprio ? :
25d8c0d55f241c John Fastabend 2014-09-12 302 TC_H_MAJ(tcf_auto_prio(rtnl_dereference(*back)));
^1da177e4c3f41 Linus Torvalds 2005-04-16 303 tp->q = q;
^1da177e4c3f41 Linus Torvalds 2005-04-16 304 tp->classify = tp_ops->classify;
^1da177e4c3f41 Linus Torvalds 2005-04-16 305 tp->classid = parent;
aa767bfea48289 Stephen Hemminger 2008-01-21 306
aa767bfea48289 Stephen Hemminger 2008-01-21 307 err = tp_ops->init(tp);
aa767bfea48289 Stephen Hemminger 2008-01-21 308 if (err != 0) {
^1da177e4c3f41 Linus Torvalds 2005-04-16 309 module_put(tp_ops->owner);
^1da177e4c3f41 Linus Torvalds 2005-04-16 310 kfree(tp);
^1da177e4c3f41 Linus Torvalds 2005-04-16 311 goto errout;
^1da177e4c3f41 Linus Torvalds 2005-04-16 312 }
^1da177e4c3f41 Linus Torvalds 2005-04-16 313
12186be7d2e110 Minoru Usui 2009-06-02 314 tp_created = 1;
^1da177e4c3f41 Linus Torvalds 2005-04-16 315
add93b610a4e66 Patrick McHardy 2008-01-22 316 } else if (tca[TCA_KIND] && nla_strcmp(tca[TCA_KIND], tp->ops->kind))
^1da177e4c3f41 Linus Torvalds 2005-04-16 317 goto errout;
^1da177e4c3f41 Linus Torvalds 2005-04-16 318
^1da177e4c3f41 Linus Torvalds 2005-04-16 319 fh = tp->ops->get(tp, t->tcm_handle);
^1da177e4c3f41 Linus Torvalds 2005-04-16 320
^1da177e4c3f41 Linus Torvalds 2005-04-16 321 if (fh == 0) {
^1da177e4c3f41 Linus Torvalds 2005-04-16 322 if (n->nlmsg_type == RTM_DELTFILTER && t->tcm_handle == 0) {
25d8c0d55f241c John Fastabend 2014-09-12 323 struct tcf_proto *next = rtnl_dereference(tp->next);
25d8c0d55f241c John Fastabend 2014-09-12 324
25d8c0d55f241c John Fastabend 2014-09-12 325 RCU_INIT_POINTER(*back, next);
^1da177e4c3f41 Linus Torvalds 2005-04-16 326
fa59b27c9d6f84 Eric Dumazet 2016-10-09 327 tfilter_notify(net, skb, n, tp, fh,
fa59b27c9d6f84 Eric Dumazet 2016-10-09 328 RTM_DELTFILTER, false);
1e052be69d045c Cong Wang 2015-03-06 329 tcf_destroy(tp, true);
^1da177e4c3f41 Linus Torvalds 2005-04-16 330 err = 0;
^1da177e4c3f41 Linus Torvalds 2005-04-16 331 goto errout;
^1da177e4c3f41 Linus Torvalds 2005-04-16 332 }
^1da177e4c3f41 Linus Torvalds 2005-04-16 333
^1da177e4c3f41 Linus Torvalds 2005-04-16 334 err = -ENOENT;
aa767bfea48289 Stephen Hemminger 2008-01-21 335 if (n->nlmsg_type != RTM_NEWTFILTER ||
aa767bfea48289 Stephen Hemminger 2008-01-21 336 !(n->nlmsg_flags & NLM_F_CREATE))
^1da177e4c3f41 Linus Torvalds 2005-04-16 337 goto errout;
^1da177e4c3f41 Linus Torvalds 2005-04-16 338 } else {
^1da177e4c3f41 Linus Torvalds 2005-04-16 339 switch (n->nlmsg_type) {
^1da177e4c3f41 Linus Torvalds 2005-04-16 340 case RTM_NEWTFILTER:
^1da177e4c3f41 Linus Torvalds 2005-04-16 341 err = -EEXIST;
12186be7d2e110 Minoru Usui 2009-06-02 342 if (n->nlmsg_flags & NLM_F_EXCL) {
12186be7d2e110 Minoru Usui 2009-06-02 343 if (tp_created)
1e052be69d045c Cong Wang 2015-03-06 344 tcf_destroy(tp, true);
^1da177e4c3f41 Linus Torvalds 2005-04-16 345 goto errout;
12186be7d2e110 Minoru Usui 2009-06-02 346 }
^1da177e4c3f41 Linus Torvalds 2005-04-16 347 break;
^1da177e4c3f41 Linus Torvalds 2005-04-16 348 case RTM_DELTFILTER:
^1da177e4c3f41 Linus Torvalds 2005-04-16 349 err = tp->ops->delete(tp, fh);
1e052be69d045c Cong Wang 2015-03-06 350 if (err == 0) {
1e052be69d045c Cong Wang 2015-03-06 351 struct tcf_proto *next = rtnl_dereference(tp->next);
1e052be69d045c Cong Wang 2015-03-06 352
9ee7837449b3d6 Jamal Hadi Salim 2016-10-24 353 tfilter_notify(net, skb, n, tp,
9ee7837449b3d6 Jamal Hadi Salim 2016-10-24 354 t->tcm_handle,
fa59b27c9d6f84 Eric Dumazet 2016-10-09 355 RTM_DELTFILTER, false);
d744318574090c WANG Cong 2015-05-05 356 if (tcf_destroy(tp, false))
1e052be69d045c Cong Wang 2015-03-06 357 RCU_INIT_POINTER(*back, next);
1e052be69d045c Cong Wang 2015-03-06 358 }
^1da177e4c3f41 Linus Torvalds 2005-04-16 359 goto errout;
^1da177e4c3f41 Linus Torvalds 2005-04-16 360 case RTM_GETTFILTER:
5a7a5555a362f6 Jamal Hadi Salim 2016-09-18 361 err = tfilter_notify(net, skb, n, tp, fh,
fa59b27c9d6f84 Eric Dumazet 2016-10-09 362 RTM_NEWTFILTER, true);
^1da177e4c3f41 Linus Torvalds 2005-04-16 363 goto errout;
^1da177e4c3f41 Linus Torvalds 2005-04-16 364 default:
^1da177e4c3f41 Linus Torvalds 2005-04-16 365 err = -EINVAL;
^1da177e4c3f41 Linus Torvalds 2005-04-16 366 goto errout;
^1da177e4c3f41 Linus Torvalds 2005-04-16 367 }
^1da177e4c3f41 Linus Torvalds 2005-04-16 368 }
^1da177e4c3f41 Linus Torvalds 2005-04-16 369
2f7ef2f8790f5b Cong Wang 2014-04-25 370 err = tp->ops->change(net, skb, tp, cl, t->tcm_handle, tca, &fh,
2f7ef2f8790f5b Cong Wang 2014-04-25 371 n->nlmsg_flags & NLM_F_CREATE ? TCA_ACT_NOREPLACE : TCA_ACT_REPLACE);
12186be7d2e110 Minoru Usui 2009-06-02 372 if (err == 0) {
12186be7d2e110 Minoru Usui 2009-06-02 373 if (tp_created) {
25d8c0d55f241c John Fastabend 2014-09-12 374 RCU_INIT_POINTER(tp->next, rtnl_dereference(*back));
25d8c0d55f241c John Fastabend 2014-09-12 375 rcu_assign_pointer(*back, tp);
12186be7d2e110 Minoru Usui 2009-06-02 376 }
fa59b27c9d6f84 Eric Dumazet 2016-10-09 377 tfilter_notify(net, skb, n, tp, fh, RTM_NEWTFILTER, false);
12186be7d2e110 Minoru Usui 2009-06-02 378 } else {
12186be7d2e110 Minoru Usui 2009-06-02 379 if (tp_created)
1e052be69d045c Cong Wang 2015-03-06 380 tcf_destroy(tp, true);
12186be7d2e110 Minoru Usui 2009-06-02 381 }
^1da177e4c3f41 Linus Torvalds 2005-04-16 382
^1da177e4c3f41 Linus Torvalds 2005-04-16 383 errout:
^1da177e4c3f41 Linus Torvalds 2005-04-16 384 if (cl)
^1da177e4c3f41 Linus Torvalds 2005-04-16 385 cops->put(q, cl);
^1da177e4c3f41 Linus Torvalds 2005-04-16 386 if (err == -EAGAIN)
^1da177e4c3f41 Linus Torvalds 2005-04-16 387 /* Replay the request. */
^1da177e4c3f41 Linus Torvalds 2005-04-16 388 goto replay;
^1da177e4c3f41 Linus Torvalds 2005-04-16 389 return err;
^1da177e4c3f41 Linus Torvalds 2005-04-16 390 }
^1da177e4c3f41 Linus Torvalds 2005-04-16 391

:::::: The code at line 272 was first introduced by commit
:::::: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Linux-2.6.12-rc2

:::::: TO: Linus Torvalds <torvalds@xxxxxxxxxxxxxxx>
:::::: CC: Linus Torvalds <torvalds@xxxxxxxxxxxxxxx>

--
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