8021q: adding VLAN 0 to HW filter on device team0 8021q: adding VLAN 0 to HW filter on device team0 8021q: adding VLAN 0 to HW filter on device team0 8021q: adding VLAN 0 to HW filter on device team0 ================================================================== BUG: KMSAN: uninit-value in INET_ECN_decapsulate include/net/inet_ecn.h:189 [inline] BUG: KMSAN: uninit-value in IP6_ECN_decapsulate+0x421/0x970 include/net/inet_ecn.h:234 CPU: 1 PID: 6511 Comm: syz-executor0 Not tainted 4.17.0+ #8 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+0x185/0x1d0 lib/dump_stack.c:113 kmsan_report+0x188/0x2a0 mm/kmsan/kmsan.c:1122 __msan_warning_32+0x70/0xc0 mm/kmsan/kmsan_instr.c:620 INET_ECN_decapsulate include/net/inet_ecn.h:189 [inline] IP6_ECN_decapsulate+0x421/0x970 include/net/inet_ecn.h:234 ip6ip6_dscp_ecn_decapsulate+0x1e0/0x250 net/ipv6/ip6_tunnel.c:719 __ip6_tnl_rcv+0xff9/0x1a10 net/ipv6/ip6_tunnel.c:829 ip6_tnl_rcv+0xe6/0x110 net/ipv6/ip6_tunnel.c:868 gre_rcv+0x1661/0x1a90 net/ipv6/ip6_gre.c:534 ip6_input_finish+0x1353/0x2260 net/ipv6/ip6_input.c:284 NF_HOOK include/linux/netfilter.h:288 [inline] ip6_input net/ipv6/ip6_input.c:327 [inline] ip6_mc_input+0xa65/0x10a0 net/ipv6/ip6_input.c:404 dst_input include/net/dst.h:450 [inline] ip6_rcv_finish+0x498/0x6e0 net/ipv6/ip6_input.c:71 NF_HOOK include/linux/netfilter.h:288 [inline] ipv6_rcv+0x1d6b/0x2360 net/ipv6/ip6_input.c:208 __netif_receive_skb_core+0x47f3/0x4aa0 net/core/dev.c:4592 __netif_receive_skb net/core/dev.c:4657 [inline] netif_receive_skb_internal+0x49d/0x630 net/core/dev.c:4731 netif_receive_skb+0x240/0x250 net/core/dev.c:4755 tun_rx_batched drivers/net/tun.c:1563 [inline] tun_get_user+0x6b54/0x7f00 drivers/net/tun.c:1970 tun_chr_write_iter+0x1d4/0x330 drivers/net/tun.c:1998 call_write_iter include/linux/fs.h:1784 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x808/0x9f0 fs/read_write.c:487 ip6_tunnel: non-ECT from 0000:0000:0000:0000:0000:ffff:ac14:14bb with DS=0xa vfs_write+0x467/0x8c0 fs/read_write.c:549 ksys_write fs/read_write.c:598 [inline] __do_sys_write fs/read_write.c:610 [inline] __se_sys_write fs/read_write.c:607 [inline] __x64_sys_write+0x1bf/0x3e0 fs/read_write.c:607 do_syscall_64+0x15b/0x230 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x455b29 RSP: 002b:00007fbdb795cc68 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fbdb795d6d4 RCX: 0000000000455b29 RDX: 000000000000fdef RSI: 0000000020000100 RDI: 0000000000000004 RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004c2659 R14: 00000000004d37c8 R15: 0000000000000000 Uninit was created at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:279 [inline] kmsan_internal_poison_shadow+0xb8/0x1b0 mm/kmsan/kmsan.c:189 kmsan_kmalloc+0x94/0x100 mm/kmsan/kmsan.c:315 kmsan_slab_alloc+0x10/0x20 mm/kmsan/kmsan.c:322 slab_post_alloc_hook mm/slab.h:446 [inline] slab_alloc_node mm/slub.c:2753 [inline] __kmalloc_node_track_caller+0xb35/0x11b0 mm/slub.c:4395 __kmalloc_reserve net/core/skbuff.c:138 [inline] __alloc_skb+0x2cb/0x9e0 net/core/skbuff.c:206 alloc_skb include/linux/skbuff.h:988 [inline] alloc_skb_with_frags+0x1e6/0xb80 net/core/skbuff.c:5254 sock_alloc_send_pskb+0xb56/0x11a0 net/core/sock.c:2088 tun_alloc_skb drivers/net/tun.c:1540 [inline] tun_get_user+0x21cf/0x7f00 drivers/net/tun.c:1834 tun_chr_write_iter+0x1d4/0x330 drivers/net/tun.c:1998 call_write_iter include/linux/fs.h:1784 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x808/0x9f0 fs/read_write.c:487 vfs_write+0x467/0x8c0 fs/read_write.c:549 ksys_write fs/read_write.c:598 [inline] __do_sys_write fs/read_write.c:610 [inline] __se_sys_write fs/read_write.c:607 [inline] __x64_sys_write+0x1bf/0x3e0 fs/read_write.c:607 do_syscall_64+0x15b/0x230 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x44/0xa9 ==================================================================