[ 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: [ 105.380405][ T8459] bash (8459) used greatest stack depth: 3816 bytes left Warning: Permanently added '10.128.0.60' (ECDSA) to the list of known hosts. executing program [ 113.388405][ T8487] ===================================================== [ 113.395415][ T8487] BUG: KMSAN: uninit-value in bpf_skb_load_helper_16+0xd9/0x2b0 [ 113.403051][ T8487] CPU: 1 PID: 8487 Comm: syz-executor316 Not tainted 5.8.0-rc5-syzkaller #0 [ 113.411690][ T8487] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 113.421719][ T8487] Call Trace: [ 113.424986][ T8487] dump_stack+0x1df/0x240 [ 113.429302][ T8487] kmsan_report+0xf7/0x1e0 [ 113.433697][ T8487] __msan_warning+0x58/0xa0 [ 113.438177][ T8487] bpf_skb_load_helper_16+0xd9/0x2b0 [ 113.443438][ T8487] ___bpf_prog_run+0x214d/0x97a0 [ 113.448345][ T8487] ? __msan_metadata_ptr_for_store_4+0x13/0x20 [ 113.454472][ T8487] ? bpf_skb_load_helper_8_no_cache+0x340/0x340 [ 113.460690][ T8487] __bpf_prog_run32+0x101/0x170 [ 113.465519][ T8487] ? kmsan_get_metadata+0x4f/0x180 [ 113.470605][ T8487] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 113.476385][ T8487] ? ___bpf_prog_run+0x97a0/0x97a0 [ 113.481469][ T8487] sk_filter_trim_cap+0x42a/0xcc0 [ 113.486474][ T8487] ? kmsan_get_metadata+0x11d/0x180 [ 113.491647][ T8487] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 113.497426][ T8487] unix_dgram_sendmsg+0x1987/0x3c30 [ 113.502599][ T8487] ? kmsan_get_metadata+0x11d/0x180 [ 113.507784][ T8487] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 113.513835][ T8487] unix_seqpacket_sendmsg+0x26c/0x2e0 [ 113.519185][ T8487] ? unix_dgram_peer_wake_me+0x7e0/0x7e0 [ 113.524805][ T8487] ____sys_sendmsg+0x1370/0x1400 [ 113.529724][ T8487] __sys_sendmmsg+0x60e/0xd80 [ 113.534379][ T8487] ? __local_bh_enable_ip+0x97/0x1d0 [ 113.539638][ T8487] ? sock_setsockopt+0x4be7/0x53c0 [ 113.544726][ T8487] ? security_socket_setsockopt+0x1a6/0x200 [ 113.550592][ T8487] ? kmsan_get_metadata+0x4f/0x180 [ 113.555677][ T8487] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 113.561455][ T8487] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 113.567495][ T8487] ? kmsan_get_metadata+0x11d/0x180 [ 113.572665][ T8487] ? kmsan_get_metadata+0x11d/0x180 [ 113.577838][ T8487] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 113.583619][ T8487] ? __msan_metadata_ptr_for_store_4+0x13/0x20 [ 113.589784][ T8487] ? __prepare_exit_to_usermode+0x16c/0x4d0 [ 113.595664][ T8487] __se_sys_sendmmsg+0xbd/0xe0 [ 113.600410][ T8487] __x64_sys_sendmmsg+0x56/0x70 [ 113.605240][ T8487] do_syscall_64+0xb0/0x150 [ 113.609720][ T8487] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 113.615586][ T8487] RIP: 0033:0x4402b9 [ 113.619450][ T8487] Code: Bad RIP value. [ 113.623487][ T8487] RSP: 002b:00007ffcc6395518 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 [ 113.631870][ T8487] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004402b9 [ 113.639815][ T8487] RDX: 03fffffffffffe36 RSI: 0000000020001e00 RDI: 0000000000000003 [ 113.647760][ T8487] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 [ 113.655720][ T8487] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401ac0 [ 113.663665][ T8487] R13: 0000000000401b50 R14: 0000000000000000 R15: 0000000000000000 [ 113.671612][ T8487] [ 113.673914][ T8487] Uninit was stored to memory at: [ 113.678919][ T8487] kmsan_internal_chain_origin+0xad/0x130 [ 113.684612][ T8487] __msan_chain_origin+0x50/0x90 [ 113.689522][ T8487] ___bpf_prog_run+0x6cbe/0x97a0 [ 113.694431][ T8487] __bpf_prog_run32+0x101/0x170 [ 113.699263][ T8487] sk_filter_trim_cap+0x42a/0xcc0 [ 113.704260][ T8487] unix_dgram_sendmsg+0x1987/0x3c30 [ 113.709430][ T8487] unix_seqpacket_sendmsg+0x26c/0x2e0 [ 113.714775][ T8487] ____sys_sendmsg+0x1370/0x1400 [ 113.719682][ T8487] __sys_sendmmsg+0x60e/0xd80 [ 113.724344][ T8487] __se_sys_sendmmsg+0xbd/0xe0 [ 113.729082][ T8487] __x64_sys_sendmmsg+0x56/0x70 [ 113.733904][ T8487] do_syscall_64+0xb0/0x150 [ 113.738381][ T8487] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 113.744237][ T8487] [ 113.746533][ T8487] Uninit was stored to memory at: [ 113.751531][ T8487] kmsan_internal_chain_origin+0xad/0x130 [ 113.757220][ T8487] __msan_chain_origin+0x50/0x90 [ 113.762130][ T8487] ___bpf_prog_run+0x6c64/0x97a0 [ 113.767038][ T8487] __bpf_prog_run32+0x101/0x170 [ 113.771859][ T8487] sk_filter_trim_cap+0x42a/0xcc0 [ 113.776856][ T8487] unix_dgram_sendmsg+0x1987/0x3c30 [ 113.782025][ T8487] unix_seqpacket_sendmsg+0x26c/0x2e0 [ 113.787370][ T8487] ____sys_sendmsg+0x1370/0x1400 [ 113.792278][ T8487] __sys_sendmmsg+0x60e/0xd80 [ 113.796929][ T8487] __se_sys_sendmmsg+0xbd/0xe0 [ 113.801664][ T8487] __x64_sys_sendmmsg+0x56/0x70 [ 113.806488][ T8487] do_syscall_64+0xb0/0x150 [ 113.810963][ T8487] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 113.816820][ T8487] [ 113.819120][ T8487] Local variable ----regs@__bpf_prog_run32 created at: [ 113.825940][ T8487] __bpf_prog_run32+0x87/0x170 [ 113.830675][ T8487] __bpf_prog_run32+0x87/0x170 [ 113.835403][ T8487] ===================================================== [ 113.842302][ T8487] Disabling lock debugging due to kernel taint [ 113.848423][ T8487] Kernel panic - not syncing: panic_on_warn set ... [ 113.854983][ T8487] CPU: 1 PID: 8487 Comm: syz-executor316 Tainted: G B 5.8.0-rc5-syzkaller #0 [ 113.865016][ T8487] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 113.875042][ T8487] Call Trace: [ 113.878308][ T8487] dump_stack+0x1df/0x240 [ 113.882616][ T8487] panic+0x3d5/0xc3e [ 113.886497][ T8487] kmsan_report+0x1df/0x1e0 [ 113.890975][ T8487] __msan_warning+0x58/0xa0 [ 113.895473][ T8487] bpf_skb_load_helper_16+0xd9/0x2b0 [ 113.900736][ T8487] ___bpf_prog_run+0x214d/0x97a0 [ 113.905675][ T8487] ? __msan_metadata_ptr_for_store_4+0x13/0x20 [ 113.911805][ T8487] ? bpf_skb_load_helper_8_no_cache+0x340/0x340 [ 113.918027][ T8487] __bpf_prog_run32+0x101/0x170 [ 113.922856][ T8487] ? kmsan_get_metadata+0x4f/0x180 [ 113.927939][ T8487] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 113.933718][ T8487] ? ___bpf_prog_run+0x97a0/0x97a0 [ 113.938800][ T8487] sk_filter_trim_cap+0x42a/0xcc0 [ 113.943805][ T8487] ? kmsan_get_metadata+0x11d/0x180 [ 113.948974][ T8487] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 113.954753][ T8487] unix_dgram_sendmsg+0x1987/0x3c30 [ 113.959924][ T8487] ? kmsan_get_metadata+0x11d/0x180 [ 113.965098][ T8487] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 113.971149][ T8487] unix_seqpacket_sendmsg+0x26c/0x2e0 [ 113.976495][ T8487] ? unix_dgram_peer_wake_me+0x7e0/0x7e0 [ 113.982104][ T8487] ____sys_sendmsg+0x1370/0x1400 [ 113.987026][ T8487] __sys_sendmmsg+0x60e/0xd80 [ 113.991679][ T8487] ? __local_bh_enable_ip+0x97/0x1d0 [ 113.996944][ T8487] ? sock_setsockopt+0x4be7/0x53c0 [ 114.002033][ T8487] ? security_socket_setsockopt+0x1a6/0x200 [ 114.007898][ T8487] ? kmsan_get_metadata+0x4f/0x180 [ 114.012980][ T8487] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 114.018764][ T8487] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 114.024804][ T8487] ? kmsan_get_metadata+0x11d/0x180 [ 114.029975][ T8487] ? kmsan_get_metadata+0x11d/0x180 [ 114.035146][ T8487] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 114.040924][ T8487] ? __msan_metadata_ptr_for_store_4+0x13/0x20 [ 114.047051][ T8487] ? __prepare_exit_to_usermode+0x16c/0x4d0 [ 114.052937][ T8487] __se_sys_sendmmsg+0xbd/0xe0 [ 114.057678][ T8487] __x64_sys_sendmmsg+0x56/0x70 [ 114.062504][ T8487] do_syscall_64+0xb0/0x150 [ 114.066990][ T8487] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 114.072856][ T8487] RIP: 0033:0x4402b9 [ 114.076716][ T8487] Code: Bad RIP value. [ 114.080753][ T8487] RSP: 002b:00007ffcc6395518 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 [ 114.089136][ T8487] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004402b9 [ 114.097082][ T8487] RDX: 03fffffffffffe36 RSI: 0000000020001e00 RDI: 0000000000000003 [ 114.105027][ T8487] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 [ 114.112978][ T8487] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401ac0 [ 114.120928][ T8487] R13: 0000000000401b50 R14: 0000000000000000 R15: 0000000000000000 [ 114.130198][ T8487] Kernel Offset: 0x10800000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) [ 114.142324][ T8487] Rebooting in 86400 seconds..