[ OK ] Started OpenBSD Secure Shell server. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 syzkaller login: [ 104.009659][ T8782] sshd (8782) used greatest stack depth: 4136 bytes left Warning: Permanently added '10.128.10.5' (ECDSA) to the list of known hosts. executing program [ 111.864805][ T8816] ===================================================== [ 111.872515][ T8816] BUG: KMSAN: uninit-value in bpf_skb_get_nlattr+0x145/0x290 [ 111.880430][ T8816] CPU: 1 PID: 8816 Comm: syz-executor213 Not tainted 5.7.0-rc4-syzkaller #0 [ 111.889079][ T8816] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 111.899812][ T8816] Call Trace: [ 111.903116][ T8816] dump_stack+0x1c9/0x220 [ 111.907455][ T8816] kmsan_report+0xf7/0x1e0 [ 111.911872][ T8816] __msan_warning+0x58/0xa0 [ 111.916654][ T8816] bpf_skb_get_nlattr+0x145/0x290 [ 111.921661][ T8816] ___bpf_prog_run+0x214d/0x97a0 [ 111.926606][ T8816] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 111.932737][ T8816] ? do_syscall_64+0xb8/0x160 [ 111.937773][ T8816] ? bpf_skb_get_pay_offset+0x60/0x60 [ 111.944119][ T8816] __bpf_prog_run32+0x101/0x170 [ 111.948968][ T8816] ? kmsan_get_metadata+0x4f/0x180 [ 111.954073][ T8816] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 111.959857][ T8816] ? ___bpf_prog_run+0x97a0/0x97a0 [ 111.964947][ T8816] sk_filter_trim_cap+0x42a/0xcc0 [ 111.969952][ T8816] ? kmsan_get_metadata+0x11d/0x180 [ 111.975127][ T8816] ? kmsan_set_origin_checked+0x95/0xf0 [ 111.980658][ T8816] ? kmsan_get_metadata+0x11d/0x180 [ 111.985832][ T8816] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 111.991634][ T8816] netlink_unicast+0x4b9/0x1100 [ 111.996498][ T8816] netlink_ack+0x105c/0x11a0 [ 112.001076][ T8816] netlink_rcv_skb+0x321/0x650 [ 112.005818][ T8816] ? rtnetlink_bind+0x120/0x120 [ 112.010649][ T8816] rtnetlink_rcv+0x50/0x60 [ 112.015042][ T8816] netlink_unicast+0xf9e/0x1100 [ 112.019869][ T8816] ? rtnetlink_net_exit+0x90/0x90 [ 112.024872][ T8816] netlink_sendmsg+0x1246/0x14d0 [ 112.029811][ T8816] ? netlink_getsockopt+0x1440/0x1440 [ 112.035179][ T8816] ____sys_sendmsg+0x12b6/0x1350 [ 112.040097][ T8816] __sys_sendmsg+0x623/0x750 [ 112.044671][ T8816] ? security_socket_setsockopt+0x1a6/0x200 [ 112.050554][ T8816] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 112.056632][ T8816] ? kmsan_get_metadata+0x11d/0x180 [ 112.061819][ T8816] ? kmsan_get_metadata+0x11d/0x180 [ 112.066989][ T8816] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 112.072772][ T8816] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 112.078814][ T8816] ? prepare_exit_to_usermode+0x1ca/0x520 [ 112.084510][ T8816] __se_sys_sendmsg+0x97/0xb0 [ 112.089163][ T8816] __x64_sys_sendmsg+0x4a/0x70 [ 112.093922][ T8816] do_syscall_64+0xb8/0x160 [ 112.098403][ T8816] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 112.104283][ T8816] RIP: 0033:0x440309 [ 112.108155][ T8816] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 112.127732][ T8816] RSP: 002b:00007ffd7b2f95f8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 112.136130][ T8816] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440309 [ 112.144073][ T8816] RDX: 0000000000000000 RSI: 00000000200001c0 RDI: 0000000000000003 [ 112.152017][ T8816] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 [ 112.159984][ T8816] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401b90 [ 112.167950][ T8816] R13: 0000000000401c20 R14: 0000000000000000 R15: 0000000000000000 [ 112.175900][ T8816] [ 112.178208][ T8816] Uninit was stored to memory at: [ 112.183207][ T8816] kmsan_internal_chain_origin+0xad/0x130 [ 112.188899][ T8816] __msan_chain_origin+0x50/0x90 [ 112.193816][ T8816] ___bpf_prog_run+0x6cbe/0x97a0 [ 112.198745][ T8816] __bpf_prog_run32+0x101/0x170 [ 112.203568][ T8816] sk_filter_trim_cap+0x42a/0xcc0 [ 112.208840][ T8816] netlink_unicast+0x4b9/0x1100 [ 112.213661][ T8816] netlink_ack+0x105c/0x11a0 [ 112.218222][ T8816] netlink_rcv_skb+0x321/0x650 [ 112.222959][ T8816] rtnetlink_rcv+0x50/0x60 [ 112.227346][ T8816] netlink_unicast+0xf9e/0x1100 [ 112.232171][ T8816] netlink_sendmsg+0x1246/0x14d0 [ 112.237084][ T8816] ____sys_sendmsg+0x12b6/0x1350 [ 112.241993][ T8816] __sys_sendmsg+0x623/0x750 [ 112.246556][ T8816] __se_sys_sendmsg+0x97/0xb0 [ 112.251203][ T8816] __x64_sys_sendmsg+0x4a/0x70 [ 112.255953][ T8816] do_syscall_64+0xb8/0x160 [ 112.260448][ T8816] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 112.266314][ T8816] [ 112.268613][ T8816] Uninit was stored to memory at: [ 112.274147][ T8816] kmsan_internal_chain_origin+0xad/0x130 [ 112.279865][ T8816] __msan_chain_origin+0x50/0x90 [ 112.284795][ T8816] ___bpf_prog_run+0x6c64/0x97a0 [ 112.289722][ T8816] __bpf_prog_run32+0x101/0x170 [ 112.294557][ T8816] sk_filter_trim_cap+0x42a/0xcc0 [ 112.299569][ T8816] netlink_unicast+0x4b9/0x1100 [ 112.304399][ T8816] netlink_ack+0x105c/0x11a0 [ 112.309002][ T8816] netlink_rcv_skb+0x321/0x650 [ 112.313757][ T8816] rtnetlink_rcv+0x50/0x60 [ 112.318167][ T8816] netlink_unicast+0xf9e/0x1100 [ 112.322998][ T8816] netlink_sendmsg+0x1246/0x14d0 [ 112.327926][ T8816] ____sys_sendmsg+0x12b6/0x1350 [ 112.332849][ T8816] __sys_sendmsg+0x623/0x750 [ 112.337415][ T8816] __se_sys_sendmsg+0x97/0xb0 [ 112.342063][ T8816] __x64_sys_sendmsg+0x4a/0x70 [ 112.346811][ T8816] do_syscall_64+0xb8/0x160 [ 112.351287][ T8816] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 112.357166][ T8816] [ 112.359482][ T8816] Local variable ----regs@__bpf_prog_run32 created at: [ 112.366322][ T8816] __bpf_prog_run32+0x87/0x170 [ 112.371069][ T8816] __bpf_prog_run32+0x87/0x170 [ 112.375812][ T8816] ===================================================== [ 112.382731][ T8816] Disabling lock debugging due to kernel taint [ 112.388853][ T8816] Kernel panic - not syncing: panic_on_warn set ... [ 112.396901][ T8816] CPU: 1 PID: 8816 Comm: syz-executor213 Tainted: G B 5.7.0-rc4-syzkaller #0 [ 112.406931][ T8816] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 112.416975][ T8816] Call Trace: [ 112.420283][ T8816] dump_stack+0x1c9/0x220 [ 112.424598][ T8816] panic+0x3d5/0xc3e [ 112.428486][ T8816] kmsan_report+0x1df/0x1e0 [ 112.433034][ T8816] __msan_warning+0x58/0xa0 [ 112.437576][ T8816] bpf_skb_get_nlattr+0x145/0x290 [ 112.442579][ T8816] ___bpf_prog_run+0x214d/0x97a0 [ 112.447493][ T8816] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 112.453566][ T8816] ? do_syscall_64+0xb8/0x160 [ 112.458241][ T8816] ? bpf_skb_get_pay_offset+0x60/0x60 [ 112.463590][ T8816] __bpf_prog_run32+0x101/0x170 [ 112.468431][ T8816] ? kmsan_get_metadata+0x4f/0x180 [ 112.473519][ T8816] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 112.479304][ T8816] ? ___bpf_prog_run+0x97a0/0x97a0 [ 112.484393][ T8816] sk_filter_trim_cap+0x42a/0xcc0 [ 112.489400][ T8816] ? kmsan_get_metadata+0x11d/0x180 [ 112.494606][ T8816] ? kmsan_set_origin_checked+0x95/0xf0 [ 112.500139][ T8816] ? kmsan_get_metadata+0x11d/0x180 [ 112.505362][ T8816] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 112.511162][ T8816] netlink_unicast+0x4b9/0x1100 [ 112.516004][ T8816] netlink_ack+0x105c/0x11a0 [ 112.520586][ T8816] netlink_rcv_skb+0x321/0x650 [ 112.525328][ T8816] ? rtnetlink_bind+0x120/0x120 [ 112.530159][ T8816] rtnetlink_rcv+0x50/0x60 [ 112.534564][ T8816] netlink_unicast+0xf9e/0x1100 [ 112.539392][ T8816] ? rtnetlink_net_exit+0x90/0x90 [ 112.544407][ T8816] netlink_sendmsg+0x1246/0x14d0 [ 112.549328][ T8816] ? netlink_getsockopt+0x1440/0x1440 [ 112.554688][ T8816] ____sys_sendmsg+0x12b6/0x1350 [ 112.559794][ T8816] __sys_sendmsg+0x623/0x750 [ 112.564368][ T8816] ? security_socket_setsockopt+0x1a6/0x200 [ 112.570239][ T8816] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 112.576291][ T8816] ? kmsan_get_metadata+0x11d/0x180 [ 112.584329][ T8816] ? kmsan_get_metadata+0x11d/0x180 [ 112.589500][ T8816] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 112.595281][ T8816] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 112.601331][ T8816] ? prepare_exit_to_usermode+0x1ca/0x520 [ 112.607045][ T8816] __se_sys_sendmsg+0x97/0xb0 [ 112.611721][ T8816] __x64_sys_sendmsg+0x4a/0x70 [ 112.616460][ T8816] do_syscall_64+0xb8/0x160 [ 112.621047][ T8816] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 112.626933][ T8816] RIP: 0033:0x440309 [ 112.630810][ T8816] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 112.650388][ T8816] RSP: 002b:00007ffd7b2f95f8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 112.658784][ T8816] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440309 [ 112.666753][ T8816] RDX: 0000000000000000 RSI: 00000000200001c0 RDI: 0000000000000003 [ 112.674703][ T8816] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 [ 112.682652][ T8816] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401b90 [ 112.690598][ T8816] R13: 0000000000401c20 R14: 0000000000000000 R15: 0000000000000000 [ 112.699762][ T8816] Kernel Offset: 0x22c00000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) [ 112.711426][ T8816] Rebooting in 86400 seconds..