Hi Matteo, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on net/master] [also build test WARNING on v5.1-rc7] [cannot apply to next-20190429] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] url: https://github.com/0day-ci/linux/commits/Matteo-Croce/proc-sysctl-add-shared-variables-for-range-check/20190430-065026 reproduce: # apt-get install sparse make ARCH=x86_64 allmodconfig make C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' If you fix the issue, kindly add following tag Reported-by: kbuild test robot <lkp@xxxxxxxxx> sparse warnings: (new ones prefixed by >>) >> drivers/parport/procfs.c:76:49: sparse: sparse: incorrect type in initializer (different modifiers) @@ expected struct parport_device_info *info @@ got evice_info *info @@ >> drivers/parport/procfs.c:76:49: sparse: expected struct parport_device_info *info >> drivers/parport/procfs.c:76:49: sparse: got void const *extra2 -- >> net/ipv4/devinet.c:2322:47: sparse: sparse: incorrect type in initializer (different modifiers) @@ expected struct ipv4_devconf *cnf @@ got v4_devconf *cnf @@ >> net/ipv4/devinet.c:2322:47: sparse: expected struct ipv4_devconf *cnf >> net/ipv4/devinet.c:2322:47: sparse: got void const *extra1 >> net/ipv4/devinet.c:2323:38: sparse: sparse: incorrect type in initializer (different modifiers) @@ expected struct net *net @@ got struct net *net @@ >> net/ipv4/devinet.c:2323:38: sparse: expected struct net *net >> net/ipv4/devinet.c:2323:38: sparse: got void const *extra2 net/ipv4/devinet.c:2376:38: sparse: sparse: incorrect type in initializer (different modifiers) @@ expected struct net *net @@ got struct net *net @@ net/ipv4/devinet.c:2376:38: sparse: expected struct net *net net/ipv4/devinet.c:2376:38: sparse: got void const *extra2 net/ipv4/devinet.c:2388:63: sparse: sparse: incorrect type in initializer (different modifiers) @@ expected struct ipv4_devconf *cnf @@ got v4_devconf *cnf @@ net/ipv4/devinet.c:2388:63: sparse: expected struct ipv4_devconf *cnf net/ipv4/devinet.c:2388:63: sparse: got void const *extra1 net/ipv4/devinet.c:2417:30: sparse: sparse: incorrect type in initializer (different modifiers) @@ expected struct net *net @@ got struct net *net @@ net/ipv4/devinet.c:2417:30: sparse: expected struct net *net net/ipv4/devinet.c:2417:30: sparse: got void const *extra2 -- >> net/ipv6/addrconf.c:6029:37: sparse: sparse: incorrect type in initializer (different modifiers) @@ expected struct inet6_dev *idev @@ got inet6_dev *idev @@ >> net/ipv6/addrconf.c:6029:37: sparse: expected struct inet6_dev *idev >> net/ipv6/addrconf.c:6029:37: sparse: got void const *extra1 >> net/ipv6/addrconf.c:6136:38: sparse: sparse: incorrect type in initializer (different modifiers) @@ expected struct net *net @@ got struct net *net @@ >> net/ipv6/addrconf.c:6136:38: sparse: expected struct net *net >> net/ipv6/addrconf.c:6136:38: sparse: got void const *extra2 net/ipv6/addrconf.c:6152:53: sparse: sparse: incorrect type in initializer (different modifiers) @@ expected struct inet6_dev *idev @@ got inet6_dev *idev @@ net/ipv6/addrconf.c:6152:53: sparse: expected struct inet6_dev *idev net/ipv6/addrconf.c:6152:53: sparse: got void const *extra1 net/ipv6/addrconf.c:6235:30: sparse: sparse: incorrect type in initializer (different modifiers) @@ expected struct net *net @@ got struct net *net @@ net/ipv6/addrconf.c:6235:30: sparse: expected struct net *net net/ipv6/addrconf.c:6235:30: sparse: got void const *extra2 net/ipv6/addrconf.c:6282:45: sparse: sparse: incorrect type in initializer (different modifiers) @@ expected struct inet6_dev *idev @@ got inet6_dev *idev @@ net/ipv6/addrconf.c:6282:45: sparse: expected struct inet6_dev *idev net/ipv6/addrconf.c:6282:45: sparse: got void const *extra1 -- >> net/ipv6/ndisc.c:1826:37: sparse: sparse: incorrect type in initializer (different modifiers) @@ expected struct net_device *dev @@ got net_device *dev @@ >> net/ipv6/ndisc.c:1826:37: sparse: expected struct net_device *dev >> net/ipv6/ndisc.c:1826:37: sparse: got void const *extra1 -- >> net/decnet/dn_dev.c:252:39: sparse: sparse: incorrect type in initializer (different modifiers) @@ expected struct net_device *dev @@ got net_device *dev @@ >> net/decnet/dn_dev.c:252:39: sparse: expected struct net_device *dev >> net/decnet/dn_dev.c:252:39: sparse: got void const *extra1 -- >> fs/fscache/main.c:61:46: sparse: sparse: incorrect type in initializer (different modifiers) @@ expected struct workqueue_struct **wqp @@ got ue_struct **wqp @@ >> fs/fscache/main.c:61:46: sparse: expected struct workqueue_struct **wqp >> fs/fscache/main.c:61:46: sparse: got void const *extra1 -- >> net/mpls/af_mpls.c:1370:44: sparse: sparse: incorrect type in initializer (different modifiers) @@ expected struct mpls_dev *mdev @@ got t mpls_dev *mdev @@ >> net/mpls/af_mpls.c:1370:44: sparse: expected struct mpls_dev *mdev >> net/mpls/af_mpls.c:1370:44: sparse: got void const *extra1 >> net/mpls/af_mpls.c:1372:38: sparse: sparse: incorrect type in initializer (different modifiers) @@ expected struct net *net @@ got struct net *net @@ >> net/mpls/af_mpls.c:1372:38: sparse: expected struct net *net >> net/mpls/af_mpls.c:1372:38: sparse: got void const *extra2 -- >> net/netfilter/nf_log.c:422:32: sparse: sparse: incorrect type in initializer (different modifiers) @@ expected struct net *net @@ got struct net *net @@ >> net/netfilter/nf_log.c:422:32: sparse: expected struct net *net >> net/netfilter/nf_log.c:422:32: sparse: got void const *extra2 -- >> net/netfilter/ipvs/ip_vs_ctl.c:1664:40: sparse: sparse: incorrect type in initializer (different modifiers) @@ expected struct netns_ipvs *ipvs @@ got netns_ipvs *ipvs @@ >> net/netfilter/ipvs/ip_vs_ctl.c:1664:40: sparse: expected struct netns_ipvs *ipvs >> net/netfilter/ipvs/ip_vs_ctl.c:1664:40: sparse: got void const *extra2 net/netfilter/ipvs/ip_vs_ctl.c:1298:27: sparse: sparse: dereference of noderef expression vim +6029 net/ipv6/addrconf.c ^1da177e Linus Torvalds 2005-04-16 6024 77751427 Marcelo Leitner 2015-02-23 6025 static 77751427 Marcelo Leitner 2015-02-23 6026 int addrconf_sysctl_mtu(struct ctl_table *ctl, int write, 77751427 Marcelo Leitner 2015-02-23 6027 void __user *buffer, size_t *lenp, loff_t *ppos) 77751427 Marcelo Leitner 2015-02-23 6028 { 77751427 Marcelo Leitner 2015-02-23 @6029 struct inet6_dev *idev = ctl->extra1; 77751427 Marcelo Leitner 2015-02-23 6030 int min_mtu = IPV6_MIN_MTU; 77751427 Marcelo Leitner 2015-02-23 6031 struct ctl_table lctl; 77751427 Marcelo Leitner 2015-02-23 6032 77751427 Marcelo Leitner 2015-02-23 6033 lctl = *ctl; 77751427 Marcelo Leitner 2015-02-23 6034 lctl.extra1 = &min_mtu; 77751427 Marcelo Leitner 2015-02-23 6035 lctl.extra2 = idev ? &idev->dev->mtu : NULL; 77751427 Marcelo Leitner 2015-02-23 6036 77751427 Marcelo Leitner 2015-02-23 6037 return proc_dointvec_minmax(&lctl, write, buffer, lenp, ppos); 77751427 Marcelo Leitner 2015-02-23 6038 } 77751427 Marcelo Leitner 2015-02-23 6039 56d417b1 Brian Haley 2009-06-01 6040 static void dev_disable_change(struct inet6_dev *idev) 56d417b1 Brian Haley 2009-06-01 6041 { 75538c2b Cong Wang 2013-05-29 6042 struct netdev_notifier_info info; 75538c2b Cong Wang 2013-05-29 6043 56d417b1 Brian Haley 2009-06-01 6044 if (!idev || !idev->dev) 56d417b1 Brian Haley 2009-06-01 6045 return; 56d417b1 Brian Haley 2009-06-01 6046 75538c2b Cong Wang 2013-05-29 6047 netdev_notifier_info_init(&info, idev->dev); 56d417b1 Brian Haley 2009-06-01 6048 if (idev->cnf.disable_ipv6) 75538c2b Cong Wang 2013-05-29 6049 addrconf_notify(NULL, NETDEV_DOWN, &info); 56d417b1 Brian Haley 2009-06-01 6050 else 75538c2b Cong Wang 2013-05-29 6051 addrconf_notify(NULL, NETDEV_UP, &info); 56d417b1 Brian Haley 2009-06-01 6052 } 56d417b1 Brian Haley 2009-06-01 6053 56d417b1 Brian Haley 2009-06-01 6054 static void addrconf_disable_change(struct net *net, __s32 newf) 56d417b1 Brian Haley 2009-06-01 6055 { 56d417b1 Brian Haley 2009-06-01 6056 struct net_device *dev; 56d417b1 Brian Haley 2009-06-01 6057 struct inet6_dev *idev; 56d417b1 Brian Haley 2009-06-01 6058 03e4deff Kefeng Wang 2017-01-19 6059 for_each_netdev(net, dev) { 56d417b1 Brian Haley 2009-06-01 6060 idev = __in6_dev_get(dev); 56d417b1 Brian Haley 2009-06-01 6061 if (idev) { 56d417b1 Brian Haley 2009-06-01 6062 int changed = (!idev->cnf.disable_ipv6) ^ (!newf); 56d417b1 Brian Haley 2009-06-01 6063 idev->cnf.disable_ipv6 = newf; 56d417b1 Brian Haley 2009-06-01 6064 if (changed) 56d417b1 Brian Haley 2009-06-01 6065 dev_disable_change(idev); 56d417b1 Brian Haley 2009-06-01 6066 } 56d417b1 Brian Haley 2009-06-01 6067 } 56d417b1 Brian Haley 2009-06-01 6068 } 56d417b1 Brian Haley 2009-06-01 6069 013d97e9 Francesco Ruggeri 2012-01-16 6070 static int addrconf_disable_ipv6(struct ctl_table *table, int *p, int newf) 56d417b1 Brian Haley 2009-06-01 6071 { 56d417b1 Brian Haley 2009-06-01 6072 struct net *net; 013d97e9 Francesco Ruggeri 2012-01-16 6073 int old; 013d97e9 Francesco Ruggeri 2012-01-16 6074 013d97e9 Francesco Ruggeri 2012-01-16 6075 if (!rtnl_trylock()) 013d97e9 Francesco Ruggeri 2012-01-16 6076 return restart_syscall(); 56d417b1 Brian Haley 2009-06-01 6077 56d417b1 Brian Haley 2009-06-01 6078 net = (struct net *)table->extra2; 013d97e9 Francesco Ruggeri 2012-01-16 6079 old = *p; 013d97e9 Francesco Ruggeri 2012-01-16 6080 *p = newf; 56d417b1 Brian Haley 2009-06-01 6081 013d97e9 Francesco Ruggeri 2012-01-16 6082 if (p == &net->ipv6.devconf_dflt->disable_ipv6) { 013d97e9 Francesco Ruggeri 2012-01-16 6083 rtnl_unlock(); 56d417b1 Brian Haley 2009-06-01 6084 return 0; 88af182e Eric W. Biederman 2010-02-19 6085 } 56d417b1 Brian Haley 2009-06-01 6086 56d417b1 Brian Haley 2009-06-01 6087 if (p == &net->ipv6.devconf_all->disable_ipv6) { 56d417b1 Brian Haley 2009-06-01 6088 net->ipv6.devconf_dflt->disable_ipv6 = newf; 56d417b1 Brian Haley 2009-06-01 6089 addrconf_disable_change(net, newf); 013d97e9 Francesco Ruggeri 2012-01-16 6090 } else if ((!newf) ^ (!old)) 56d417b1 Brian Haley 2009-06-01 6091 dev_disable_change((struct inet6_dev *)table->extra1); 56d417b1 Brian Haley 2009-06-01 6092 56d417b1 Brian Haley 2009-06-01 6093 rtnl_unlock(); 56d417b1 Brian Haley 2009-06-01 6094 return 0; 56d417b1 Brian Haley 2009-06-01 6095 } 56d417b1 Brian Haley 2009-06-01 6096 56d417b1 Brian Haley 2009-06-01 6097 static fe2c6338 Joe Perches 2013-06-11 6098 int addrconf_sysctl_disable(struct ctl_table *ctl, int write, 56d417b1 Brian Haley 2009-06-01 6099 void __user *buffer, size_t *lenp, loff_t *ppos) 56d417b1 Brian Haley 2009-06-01 6100 { 56d417b1 Brian Haley 2009-06-01 6101 int *valp = ctl->data; 56d417b1 Brian Haley 2009-06-01 6102 int val = *valp; 88af182e Eric W. Biederman 2010-02-19 6103 loff_t pos = *ppos; fe2c6338 Joe Perches 2013-06-11 6104 struct ctl_table lctl; 56d417b1 Brian Haley 2009-06-01 6105 int ret; 56d417b1 Brian Haley 2009-06-01 6106 013d97e9 Francesco Ruggeri 2012-01-16 6107 /* 013d97e9 Francesco Ruggeri 2012-01-16 6108 * ctl->data points to idev->cnf.disable_ipv6, we should 013d97e9 Francesco Ruggeri 2012-01-16 6109 * not modify it until we get the rtnl lock. 013d97e9 Francesco Ruggeri 2012-01-16 6110 */ 013d97e9 Francesco Ruggeri 2012-01-16 6111 lctl = *ctl; 013d97e9 Francesco Ruggeri 2012-01-16 6112 lctl.data = &val; 013d97e9 Francesco Ruggeri 2012-01-16 6113 013d97e9 Francesco Ruggeri 2012-01-16 6114 ret = proc_dointvec(&lctl, write, buffer, lenp, ppos); 56d417b1 Brian Haley 2009-06-01 6115 56d417b1 Brian Haley 2009-06-01 6116 if (write) 56d417b1 Brian Haley 2009-06-01 6117 ret = addrconf_disable_ipv6(ctl, valp, val); 88af182e Eric W. Biederman 2010-02-19 6118 if (ret) 88af182e Eric W. Biederman 2010-02-19 6119 *ppos = pos; 56d417b1 Brian Haley 2009-06-01 6120 return ret; 56d417b1 Brian Haley 2009-06-01 6121 } 56d417b1 Brian Haley 2009-06-01 6122 c92d5491 stephen hemminger 2013-12-17 6123 static c92d5491 stephen hemminger 2013-12-17 6124 int addrconf_sysctl_proxy_ndp(struct ctl_table *ctl, int write, c92d5491 stephen hemminger 2013-12-17 6125 void __user *buffer, size_t *lenp, loff_t *ppos) c92d5491 stephen hemminger 2013-12-17 6126 { c92d5491 stephen hemminger 2013-12-17 6127 int *valp = ctl->data; c92d5491 stephen hemminger 2013-12-17 6128 int ret; c92d5491 stephen hemminger 2013-12-17 6129 int old, new; c92d5491 stephen hemminger 2013-12-17 6130 c92d5491 stephen hemminger 2013-12-17 6131 old = *valp; c92d5491 stephen hemminger 2013-12-17 6132 ret = proc_dointvec(ctl, write, buffer, lenp, ppos); c92d5491 stephen hemminger 2013-12-17 6133 new = *valp; c92d5491 stephen hemminger 2013-12-17 6134 c92d5491 stephen hemminger 2013-12-17 6135 if (write && old != new) { c92d5491 stephen hemminger 2013-12-17 @6136 struct net *net = ctl->extra2; c92d5491 stephen hemminger 2013-12-17 6137 c92d5491 stephen hemminger 2013-12-17 6138 if (!rtnl_trylock()) c92d5491 stephen hemminger 2013-12-17 6139 return restart_syscall(); c92d5491 stephen hemminger 2013-12-17 6140 c92d5491 stephen hemminger 2013-12-17 6141 if (valp == &net->ipv6.devconf_dflt->proxy_ndp) 85b3daad David Ahern 2017-03-28 6142 inet6_netconf_notify_devconf(net, RTM_NEWNETCONF, 85b3daad David Ahern 2017-03-28 6143 NETCONFA_PROXY_NEIGH, c92d5491 stephen hemminger 2013-12-17 6144 NETCONFA_IFINDEX_DEFAULT, c92d5491 stephen hemminger 2013-12-17 6145 net->ipv6.devconf_dflt); c92d5491 stephen hemminger 2013-12-17 6146 else if (valp == &net->ipv6.devconf_all->proxy_ndp) 85b3daad David Ahern 2017-03-28 6147 inet6_netconf_notify_devconf(net, RTM_NEWNETCONF, 85b3daad David Ahern 2017-03-28 6148 NETCONFA_PROXY_NEIGH, c92d5491 stephen hemminger 2013-12-17 6149 NETCONFA_IFINDEX_ALL, c92d5491 stephen hemminger 2013-12-17 6150 net->ipv6.devconf_all); c92d5491 stephen hemminger 2013-12-17 6151 else { c92d5491 stephen hemminger 2013-12-17 6152 struct inet6_dev *idev = ctl->extra1; c92d5491 stephen hemminger 2013-12-17 6153 85b3daad David Ahern 2017-03-28 6154 inet6_netconf_notify_devconf(net, RTM_NEWNETCONF, 85b3daad David Ahern 2017-03-28 6155 NETCONFA_PROXY_NEIGH, c92d5491 stephen hemminger 2013-12-17 6156 idev->dev->ifindex, c92d5491 stephen hemminger 2013-12-17 6157 &idev->cnf); c92d5491 stephen hemminger 2013-12-17 6158 } c92d5491 stephen hemminger 2013-12-17 6159 rtnl_unlock(); c92d5491 stephen hemminger 2013-12-17 6160 } c92d5491 stephen hemminger 2013-12-17 6161 c92d5491 stephen hemminger 2013-12-17 6162 return ret; c92d5491 stephen hemminger 2013-12-17 6163 } c92d5491 stephen hemminger 2013-12-17 6164 :::::: The code at line 6029 was first introduced by commit :::::: 77751427a1ff25b27d47a4c36b12c3c8667855ac ipv6: addrconf: validate new MTU before applying it :::::: TO: Marcelo Leitner <mleitner@xxxxxxxxxx> :::::: CC: David S. Miller <davem@xxxxxxxxxxxxx> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
