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rt_dst_alloc net/ipv4/route.c:1556 [inline] __mkroute_output net/ipv4/route.c:2246 [inline] ip_route_output_key_hash_rcu+0x22ad/0x3ab0 net/ipv4/route.c:2473 ip_route_output_key_hash net/ipv4/route.c:2302 [inline] __ip_route_output_key include/net/route.h:124 [inline] ip_route_output_flow+0x1d4/0x3b0 net/ipv4/route.c:2557 udp_sendmsg+0x24ab/0x33a0 net/ipv4/udp.c:1008 udpv6_sendmsg+0x1291/0x3f40 net/ipv6/udp.c:1175 ================================================================== BUG: KMSAN: uninit-value in ip_route_output_key_hash_rcu+0x1f4/0x3ab0 net/ipv4/route.c:2319 inet_sendmsg+0x48d/0x740 net/ipv4/af_inet.c:798 sock_sendmsg_nosec net/socket.c:629 [inline] sock_sendmsg net/socket.c:639 [inline] ___sys_sendmsg+0xec0/0x1310 net/socket.c:2117 __sys_sendmmsg+0x490/0x850 net/socket.c:2212 __do_sys_sendmmsg net/socket.c:2241 [inline] __se_sys_sendmmsg net/socket.c:2238 [inline] __x64_sys_sendmmsg+0x11c/0x170 net/socket.c:2238 do_syscall_64+0x154/0x220 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x455a09 RSP: 002b:00007f1afa9c2c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 00007f1afa9c36d4 RCX: 0000000000455a09 RDX: 0000000000000002 RSI: 0000000020007e00 RDI: 0000000000000014 RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000008000 R11: 0000000000000246 R12: 0000000000000015 R13: 000000000000057a R14: 00000000006fc410 R15: 0000000000000000 CPU: 0 PID: 27819 Comm: syz-executor3 Not tainted 4.17.0-rc5+ #95 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+0x142/0x240 mm/kmsan/kmsan.c:1084 __msan_warning_32+0x6c/0xb0 mm/kmsan/kmsan_instr.c:683 ip_route_output_key_hash_rcu+0x1f4/0x3ab0 net/ipv4/route.c:2319 ip_route_output_key_hash net/ipv4/route.c:2302 [inline] __ip_route_output_key include/net/route.h:124 [inline] ip_route_output_flow+0x1d4/0x3b0 net/ipv4/route.c:2557 ip_route_output_key include/net/route.h:134 [inline] ip_tunnel_xmit+0x110a/0x37c0 net/ipv4/ip_tunnel.c:717 __gre_xmit net/ipv4/ip_gre.c:449 [inline] ipgre_xmit+0xdb7/0xe90 net/ipv4/ip_gre.c:689 __netdev_start_xmit include/linux/netdevice.h:4087 [inline] netdev_start_xmit include/linux/netdevice.h:4096 [inline] xmit_one net/core/dev.c:3053 [inline] dev_hard_start_xmit+0x5f1/0xc70 net/core/dev.c:3069 __dev_queue_xmit+0x27ee/0x3520 net/core/dev.c:3584 dev_queue_xmit+0x4b/0x60 net/core/dev.c:3617 packet_snd net/packet/af_packet.c:2951 [inline] packet_sendmsg+0x7cc3/0x8ac0 net/packet/af_packet.c:2976 sock_sendmsg_nosec net/socket.c:629 [inline] sock_sendmsg net/socket.c:639 [inline] ___sys_sendmsg+0xec0/0x1310 net/socket.c:2117 __sys_sendmmsg+0x490/0x850 net/socket.c:2212 __do_sys_sendmmsg net/socket.c:2241 [inline] __se_sys_sendmmsg net/socket.c:2238 [inline] __x64_sys_sendmmsg+0x11c/0x170 net/socket.c:2238 do_syscall_64+0x154/0x220 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x455a09 RSP: 002b:00007f26444eec68 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 00007f26444ef6d4 RCX: 0000000000455a09 RDX: 0492492492492510 RSI: 0000000020871fc8 RDI: 0000000000000014 RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 000000000000057c R14: 00000000006fc440 R15: 0000000000000000 Uninit was stored to memory at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:279 [inline] kmsan_save_stack mm/kmsan/kmsan.c:294 [inline] kmsan_internal_chain_origin+0x12b/0x210 mm/kmsan/kmsan.c:685 __msan_chain_origin+0x69/0xc0 mm/kmsan/kmsan_instr.c:528 ip_tunnel_init_flow include/net/ip_tunnels.h:268 [inline] ip_tunnel_xmit+0xa64/0x37c0 net/ipv4/ip_tunnel.c:706 __gre_xmit net/ipv4/ip_gre.c:449 [inline] ipgre_xmit+0xdb7/0xe90 net/ipv4/ip_gre.c:689 __netdev_start_xmit include/linux/netdevice.h:4087 [inline] netdev_start_xmit include/linux/netdevice.h:4096 [inline] xmit_one net/core/dev.c:3053 [inline] dev_hard_start_xmit+0x5f1/0xc70 net/core/dev.c:3069 __dev_queue_xmit+0x27ee/0x3520 net/core/dev.c:3584 dev_queue_xmit+0x4b/0x60 net/core/dev.c:3617 packet_snd net/packet/af_packet.c:2951 [inline] packet_sendmsg+0x7cc3/0x8ac0 net/packet/af_packet.c:2976 sock_sendmsg_nosec net/socket.c:629 [inline] sock_sendmsg net/socket.c:639 [inline] ___sys_sendmsg+0xec0/0x1310 net/socket.c:2117 __sys_sendmmsg+0x490/0x850 net/socket.c:2212 __do_sys_sendmmsg net/socket.c:2241 [inline] __se_sys_sendmmsg net/socket.c:2238 [inline] __x64_sys_sendmmsg+0x11c/0x170 net/socket.c:2238 do_syscall_64+0x154/0x220 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x44/0xa9 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+0xb32/0x11b0 mm/slub.c:4395 __kmalloc_reserve net/core/skbuff.c:138 [inline] __alloc_skb+0x2cf/0x9f0 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+0xb56/0x1190 net/core/sock.c:2088 packet_alloc_skb net/packet/af_packet.c:2810 [inline] packet_snd net/packet/af_packet.c:2901 [inline] packet_sendmsg+0x648d/0x8ac0 net/packet/af_packet.c:2976 sock_sendmsg_nosec net/socket.c:629 [inline] sock_sendmsg net/socket.c:639 [inline] ___sys_sendmsg+0xec0/0x1310 net/socket.c:2117 __sys_sendmmsg+0x490/0x850 net/socket.c:2212 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 __do_sys_sendmmsg net/socket.c:2241 [inline] __se_sys_sendmmsg net/socket.c:2238 [inline] __x64_sys_sendmmsg+0x11c/0x170 net/socket.c:2238 do_syscall_64+0x154/0x220 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x44/0xa9 ==================================================================
| Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2018/05/16 19:18 | https://github.com/google/kmsan.git master | 9822946c7fee | 75b2448a | .config | console log | report | ci-upstream-kmsan-gce |