INIT: Entering runlevel: 2 [info] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.10.4' (ECDSA) to the list of known hosts. net.ipv6.conf.syz_tun.accept_dad = 0 net.ipv6.conf.syz_tun.router_solicitations = 0 RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported Cannot find device "vcan0" Cannot find device "vcan0" syzkaller login: [ 50.693805] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready Cannot find device "vcan0" Cannot find device "vcan0" Cannot find device "tunl0" Cannot find device "tunl0" Cannot find device "tunl0" Cannot find device "tunl0" Cannot find device "gre0" Cannot find device "gre0" Cannot find device "gre0" Cannot find device "gre0" Cannot find device "gretap0" Cannot find device "gretap0" Cannot find device "gretap0" Cannot find device "gretap0" Cannot find device "ip_vti0" Cannot find device "ip_vti0" Cannot find device "ip_vti0" Cannot find device "ip_vti0" Cannot find device "ip6_vti0" Cannot find device "ip6_vti0" Cannot find device "ip6_vti0" Cannot find device "ip6_vti0" Cannot find device "ip6tnl0" Cannot find device "ip6tnl0" Cannot find device "ip6tnl0" Cannot find device "ip6tnl0" Cannot find device "ip6gre0" Cannot find device "ip6gre0" Cannot find device "ip6gre0" Cannot find device "ip6gre0" Cannot find device "ip6gretap0" Cannot find device "ip6gretap0" Cannot find device "ip6gretap0" Cannot find device "ip6gretap0" Cannot find device "erspan0" Cannot find device "erspan0" Cannot find device "erspan0" Cannot find device "erspan0" Cannot find device "bond0" Cannot find device "bond0" Cannot find device "bond0" Cannot find device "bond0" [ 51.813123] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready Cannot find device "team0" [ 51.869618] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 51.875841] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 51.883660] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready Cannot find device "team0" Cannot find device "team0" Cannot find device "team0" Error: argument "bond0" is wrong: Device does not exist Error: argument "team0" is wrong: Device does not exist executing program [ 52.046849] ================================================================== [ 52.054254] BUG: KMSAN: uninit-value in inet_getpeer+0x1567/0x1e70 [ 52.060548] CPU: 0 PID: 3575 Comm: syzkaller242190 Not tainted 4.16.0+ #83 [ 52.067531] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 52.076857] Call Trace: [ 52.079436] dump_stack+0x185/0x1d0 [ 52.083039] ? inet_getpeer+0x1567/0x1e70 [ 52.087166] kmsan_report+0x142/0x240 [ 52.090941] __msan_warning_32+0x6c/0xb0 [ 52.094984] inet_getpeer+0x1567/0x1e70 [ 52.098943] ? ip_route_output_flow+0x238/0x3c0 [ 52.103591] icmp_send+0x2b44/0x3050 [ 52.107279] ? kmsan_set_origin+0x9e/0x160 [ 52.111495] ip_options_compile+0x237c/0x29f0 [ 52.115969] ip_rcv_finish+0xda8/0x16d0 [ 52.119926] ip_rcv+0x119d/0x16f0 [ 52.123357] __netif_receive_skb_core+0x47cf/0x4a80 [ 52.128355] ? ip_local_deliver_finish+0xd40/0xd40 [ 52.133260] netif_receive_skb_internal+0x49d/0x630 [ 52.138266] napi_gro_frags+0xf43/0x15b0 [ 52.142305] tun_get_user+0x4ed5/0x7580 [ 52.146264] tun_chr_write_iter+0x1d4/0x330 [ 52.150562] ? tun_chr_read_iter+0x460/0x460 [ 52.154949] do_iter_readv_writev+0x7bb/0x970 [ 52.159423] ? tun_chr_read_iter+0x460/0x460 [ 52.163819] do_iter_write+0x30d/0xd40 [ 52.167685] ? __msan_metadata_ptr_for_store_8+0x13/0x20 [ 52.173113] do_writev+0x3c9/0x830 [ 52.176629] ? syscall_return_slowpath+0xe9/0x700 [ 52.181448] SYSC_writev+0x9b/0xb0 [ 52.184966] SyS_writev+0x56/0x80 [ 52.188393] do_syscall_64+0x309/0x430 [ 52.192257] ? SYSC_readv+0xb0/0xb0 [ 52.195861] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 52.201025] RIP: 0033:0x4418b0 [ 52.204189] RSP: 002b:00007ffd96af47e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000014 [ 52.211869] RAX: ffffffffffffffda RBX: 000000000000001b RCX: 00000000004418b0 [ 52.219116] RDX: 0000000000000001 RSI: 00007ffd96af47f0 RDI: 00000000000000fc [ 52.226362] RBP: 00000000004a3589 R08: 0000000020000040 R09: 0000000000000000 [ 52.233605] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd96af4968 [ 52.240848] R13: 0000000000402700 R14: 0000000000000000 R15: 0000000000000000 [ 52.248093] [ 52.249693] Uninit was created at: [ 52.253211] kmsan_internal_poison_shadow+0xb8/0x1b0 [ 52.258290] kmsan_kmalloc+0x94/0x100 [ 52.262065] kmem_cache_alloc+0xaab/0xb90 [ 52.266188] inet_getpeer+0xed8/0x1e70 [ 52.270048] ip4_frag_init+0x4d1/0x740 [ 52.273913] inet_frag_find+0x7da/0x1610 [ 52.277947] ip_defrag+0x448/0x67a0 [ 52.281547] ip_local_deliver+0x18f/0x4e0 [ 52.285669] ip_rcv_finish+0x1253/0x16d0 [ 52.289708] ip_rcv+0x119d/0x16f0 [ 52.293140] __netif_receive_skb_core+0x47cf/0x4a80 [ 52.298127] netif_receive_skb_internal+0x49d/0x630 [ 52.303125] napi_gro_frags+0xf43/0x15b0 [ 52.307171] tun_get_user+0x4ed5/0x7580 [ 52.311128] tun_chr_write_iter+0x1d4/0x330 [ 52.315445] do_iter_readv_writev+0x7bb/0x970 [ 52.319921] do_iter_write+0x30d/0xd40 [ 52.324139] do_writev+0x3c9/0x830 [ 52.327657] SYSC_writev+0x9b/0xb0 [ 52.331177] SyS_writev+0x56/0x80 [ 52.334605] do_syscall_64+0x309/0x430 [ 52.338593] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 52.343752] ================================================================== [ 52.351100] Disabling lock debugging due to kernel taint [ 52.356523] Kernel panic - not syncing: panic_on_warn set ... [ 52.356523] [ 52.363878] CPU: 0 PID: 3575 Comm: syzkaller242190 Tainted: G B 4.16.0+ #83 [ 52.372169] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 52.381500] Call Trace: [ 52.384075] dump_stack+0x185/0x1d0 [ 52.387683] panic+0x39d/0x940 [ 52.390862] ? inet_getpeer+0x1567/0x1e70 [ 52.394988] kmsan_report+0x238/0x240 [ 52.398770] __msan_warning_32+0x6c/0xb0 [ 52.402808] inet_getpeer+0x1567/0x1e70 [ 52.406768] ? ip_route_output_flow+0x238/0x3c0 [ 52.411419] icmp_send+0x2b44/0x3050 [ 52.415115] ? kmsan_set_origin+0x9e/0x160 [ 52.419336] ip_options_compile+0x237c/0x29f0 [ 52.423816] ip_rcv_finish+0xda8/0x16d0 [ 52.427920] ip_rcv+0x119d/0x16f0 [ 52.431357] __netif_receive_skb_core+0x47cf/0x4a80 [ 52.436354] ? ip_local_deliver_finish+0xd40/0xd40 [ 52.441275] netif_receive_skb_internal+0x49d/0x630 [ 52.446273] napi_gro_frags+0xf43/0x15b0 [ 52.450321] tun_get_user+0x4ed5/0x7580 [ 52.454284] tun_chr_write_iter+0x1d4/0x330 [ 52.458587] ? tun_chr_read_iter+0x460/0x460 [ 52.462970] do_iter_readv_writev+0x7bb/0x970 [ 52.467445] ? tun_chr_read_iter+0x460/0x460 [ 52.471830] do_iter_write+0x30d/0xd40 [ 52.475987] ? __msan_metadata_ptr_for_store_8+0x13/0x20 [ 52.481423] do_writev+0x3c9/0x830 [ 52.484942] ? syscall_return_slowpath+0xe9/0x700 [ 52.489762] SYSC_writev+0x9b/0xb0 [ 52.493282] SyS_writev+0x56/0x80 [ 52.496712] do_syscall_64+0x309/0x430 [ 52.500578] ? SYSC_readv+0xb0/0xb0 [ 52.504184] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 52.509347] RIP: 0033:0x4418b0 [ 52.512511] RSP: 002b:00007ffd96af47e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000014 [ 52.520212] RAX: ffffffffffffffda RBX: 000000000000001b RCX: 00000000004418b0 [ 52.527467] RDX: 0000000000000001 RSI: 00007ffd96af47f0 RDI: 00000000000000fc [ 52.534715] RBP: 00000000004a3589 R08: 0000000020000040 R09: 0000000000000000 [ 52.541977] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd96af4968 [ 52.549245] R13: 0000000000402700 R14: 0000000000000000 R15: 0000000000000000 [ 52.556965] Dumping ftrace buffer: [ 52.560482] (ftrace buffer empty) [ 52.564164] Kernel Offset: disabled [ 52.567765] Rebooting in 86400 seconds..