===================================================== BUG: KMSAN: uninit-value in tcf_exts_destroy net/sched/cls_api.c:3000 [inline] BUG: KMSAN: uninit-value in tcf_exts_change+0xc9/0xf0 net/sched/cls_api.c:3059 CPU: 0 PID: 11024 Comm: syz-executor435 Not tainted 5.6.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1c9/0x220 lib/dump_stack.c:118 kmsan_report+0xf7/0x1e0 mm/kmsan/kmsan_report.c:118 __msan_warning+0x58/0xa0 mm/kmsan/kmsan_instr.c:215 tcf_exts_destroy net/sched/cls_api.c:3000 [inline] tcf_exts_change+0xc9/0xf0 net/sched/cls_api.c:3059 tcindex_set_parms net/sched/cls_tcindex.c:456 [inline] tcindex_change+0x2fe4/0x4130 net/sched/cls_tcindex.c:518 tc_new_tfilter+0x31a8/0x4f40 net/sched/cls_api.c:2103 rtnetlink_rcv_msg+0xcb7/0x1570 net/core/rtnetlink.c:5429 netlink_rcv_skb+0x451/0x650 net/netlink/af_netlink.c:2477 rtnetlink_rcv+0x50/0x60 net/core/rtnetlink.c:5456 netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline] netlink_unicast+0xf9e/0x1100 net/netlink/af_netlink.c:1328 netlink_sendmsg+0x1246/0x14d0 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg net/socket.c:672 [inline] ____sys_sendmsg+0x12b6/0x1350 net/socket.c:2343 ___sys_sendmsg net/socket.c:2397 [inline] __sys_sendmsg+0x451/0x5f0 net/socket.c:2430 __do_sys_sendmsg net/socket.c:2439 [inline] __se_sys_sendmsg+0x97/0xb0 net/socket.c:2437 __x64_sys_sendmsg+0x4a/0x70 net/socket.c:2437 do_syscall_64+0xb8/0x160 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x441829 Code: e8 2c e8 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 8b 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ffef55cc568 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000441829 RDX: 0000000000000000 RSI: 00000000200001c0 RDI: 0000000000000003 RBP: 00000000004a2b10 R08: 0000000120080522 R09: 0000000120080522 R10: 0000000120080522 R11: 0000000000000246 R12: 0000000000402640 R13: 00000000004026d0 R14: 0000000000000000 R15: 0000000000000000 Uninit was created at: kmsan_save_stack_with_flags+0x3c/0x90 mm/kmsan/kmsan.c:144 kmsan_internal_alloc_meta_for_pages mm/kmsan/kmsan_shadow.c:307 [inline] kmsan_alloc_page+0x12a/0x310 mm/kmsan/kmsan_shadow.c:336 __alloc_pages_nodemask+0x5712/0x5e80 mm/page_alloc.c:4775 alloc_pages_current+0x67d/0x990 mm/mempolicy.c:2211 alloc_pages include/linux/gfp.h:534 [inline] alloc_slab_page+0x111/0x12f0 mm/slub.c:1530 allocate_slab mm/slub.c:1675 [inline] new_slab+0x2bc/0x1130 mm/slub.c:1741 new_slab_objects mm/slub.c:2492 [inline] ___slab_alloc+0x1533/0x1f30 mm/slub.c:2643 __slab_alloc mm/slub.c:2683 [inline] slab_alloc_node mm/slub.c:2757 [inline] slab_alloc mm/slub.c:2802 [inline] __kmalloc+0x375/0x450 mm/slub.c:3835 kmalloc include/linux/slab.h:560 [inline] kzalloc+0x4e/0xa0 include/linux/slab.h:669 __register_sysctl_table+0x16c/0x2950 fs/proc/proc_sysctl.c:1331 register_net_sysctl+0x9f/0xb0 net/sysctl_net.c:121 mpls_dev_sysctl_register+0x35b/0x600 net/mpls/af_mpls.c:1421 mpls_add_dev net/mpls/af_mpls.c:1472 [inline] mpls_dev_notify+0x3c5/0x1c50 net/mpls/af_mpls.c:1598 notifier_call_chain kernel/notifier.c:83 [inline] __raw_notifier_call_chain kernel/notifier.c:361 [inline] raw_notifier_call_chain+0x12a/0x240 kernel/notifier.c:368 call_netdevice_notifiers_info net/core/dev.c:1943 [inline] call_netdevice_notifiers_extack net/core/dev.c:1955 [inline] call_netdevice_notifiers net/core/dev.c:1969 [inline] register_netdevice+0x2bc4/0x31b0 net/core/dev.c:9411 register_netdev+0x93/0xd0 net/core/dev.c:9504 ip6gre_init_net+0x43d/0x740 net/ipv6/ip6_gre.c:1581 ops_init+0x2d3/0x730 net/core/net_namespace.c:137 setup_net+0x286/0x12b0 net/core/net_namespace.c:327 copy_net_ns+0x551/0xa70 net/core/net_namespace.c:468 create_new_namespaces+0x9a8/0x11e0 kernel/nsproxy.c:108 unshare_nsproxy_namespaces+0x25e/0x340 kernel/nsproxy.c:229 ksys_unshare+0x8d5/0x1120 kernel/fork.c:2957 __do_sys_unshare kernel/fork.c:3025 [inline] __se_sys_unshare+0x41/0x60 kernel/fork.c:3023 __x64_sys_unshare+0x32/0x50 kernel/fork.c:3023 do_syscall_64+0xb8/0x160 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x44/0xa9 =====================================================