[ 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 Warning: Permanently added '10.128.15.192' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 142.344781][ T8434] ===================================================== [ 142.351856][ T8434] BUG: KMSAN: uninit-value in bpf_skb_get_nlattr_nest+0x14c/0x2f0 [ 142.359661][ T8434] CPU: 0 PID: 8434 Comm: syz-executor702 Not tainted 5.8.0-rc5-syzkaller #0 [ 142.368319][ T8434] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 142.378362][ T8434] Call Trace: [ 142.381645][ T8434] dump_stack+0x1df/0x240 [ 142.385997][ T8434] kmsan_report+0xf7/0x1e0 [ 142.390419][ T8434] __msan_warning+0x58/0xa0 [ 142.394914][ T8434] bpf_skb_get_nlattr_nest+0x14c/0x2f0 [ 142.400369][ T8434] ___bpf_prog_run+0x214d/0x97a0 [ 142.405337][ T8434] ? __msan_metadata_ptr_for_store_4+0x13/0x20 [ 142.411516][ T8434] ? bpf_skb_get_nlattr+0x290/0x290 [ 142.416918][ T8434] __bpf_prog_run32+0x101/0x170 [ 142.421775][ T8434] ? kmsan_get_metadata+0x4f/0x180 [ 142.426989][ T8434] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 142.432821][ T8434] ? ___bpf_prog_run+0x97a0/0x97a0 [ 142.437936][ T8434] sk_filter_trim_cap+0x42a/0xcc0 [ 142.442973][ T8434] ? kmsan_get_metadata+0x11d/0x180 [ 142.448178][ T8434] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 142.453978][ T8434] unix_dgram_sendmsg+0x1987/0x3c30 [ 142.459371][ T8434] ? kmsan_get_metadata+0x11d/0x180 [ 142.464562][ T8434] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 142.470671][ T8434] unix_seqpacket_sendmsg+0x26c/0x2e0 [ 142.476063][ T8434] ? unix_dgram_peer_wake_me+0x7e0/0x7e0 [ 142.481692][ T8434] ____sys_sendmsg+0x1370/0x1400 [ 142.486645][ T8434] __sys_sendmsg+0x623/0x750 [ 142.491248][ T8434] ? security_socket_setsockopt+0x1a6/0x200 [ 142.497172][ T8434] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 142.503260][ T8434] ? kmsan_get_metadata+0x11d/0x180 [ 142.508455][ T8434] ? kmsan_get_metadata+0x11d/0x180 [ 142.513656][ T8434] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 142.519454][ T8434] ? __msan_metadata_ptr_for_store_4+0x13/0x20 [ 142.525618][ T8434] ? __prepare_exit_to_usermode+0x16c/0x4d0 [ 142.531558][ T8434] __se_sys_sendmsg+0x97/0xb0 [ 142.536265][ T8434] __x64_sys_sendmsg+0x4a/0x70 [ 142.541074][ T8434] do_syscall_64+0xb0/0x150 [ 142.545583][ T8434] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 142.551462][ T8434] RIP: 0033:0x440349 [ 142.555336][ T8434] Code: Bad RIP value. [ 142.559394][ T8434] RSP: 002b:00007ffe462dc5f8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 142.568759][ T8434] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440349 [ 142.576813][ T8434] RDX: 0000000000000000 RSI: 0000000020000480 RDI: 0000000000000003 [ 142.584775][ T8434] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 [ 142.592763][ T8434] R10: 0000000000000010 R11: 0000000000000246 R12: 0000000000401b50 [ 142.600738][ T8434] R13: 0000000000401be0 R14: 0000000000000000 R15: 0000000000000000 [ 142.608853][ T8434] [ 142.611182][ T8434] Uninit was stored to memory at: [ 142.617169][ T8434] kmsan_internal_chain_origin+0xad/0x130 [ 142.623038][ T8434] __msan_chain_origin+0x50/0x90 [ 142.627974][ T8434] ___bpf_prog_run+0x6cbe/0x97a0 [ 142.632913][ T8434] __bpf_prog_run32+0x101/0x170 [ 142.637800][ T8434] sk_filter_trim_cap+0x42a/0xcc0 [ 142.642838][ T8434] unix_dgram_sendmsg+0x1987/0x3c30 [ 142.648025][ T8434] unix_seqpacket_sendmsg+0x26c/0x2e0 [ 142.653390][ T8434] ____sys_sendmsg+0x1370/0x1400 [ 142.658339][ T8434] __sys_sendmsg+0x623/0x750 [ 142.662919][ T8434] __se_sys_sendmsg+0x97/0xb0 [ 142.667609][ T8434] __x64_sys_sendmsg+0x4a/0x70 [ 142.672361][ T8434] do_syscall_64+0xb0/0x150 [ 142.676856][ T8434] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 142.682725][ T8434] [ 142.685051][ T8434] Uninit was stored to memory at: [ 142.690063][ T8434] kmsan_internal_chain_origin+0xad/0x130 [ 142.695771][ T8434] __msan_chain_origin+0x50/0x90 [ 142.700720][ T8434] ___bpf_prog_run+0x6c64/0x97a0 [ 142.705642][ T8434] __bpf_prog_run32+0x101/0x170 [ 142.710490][ T8434] sk_filter_trim_cap+0x42a/0xcc0 [ 142.715499][ T8434] unix_dgram_sendmsg+0x1987/0x3c30 [ 142.720803][ T8434] unix_seqpacket_sendmsg+0x26c/0x2e0 [ 142.726158][ T8434] ____sys_sendmsg+0x1370/0x1400 [ 142.731089][ T8434] __sys_sendmsg+0x623/0x750 [ 142.735672][ T8434] __se_sys_sendmsg+0x97/0xb0 [ 142.740338][ T8434] __x64_sys_sendmsg+0x4a/0x70 [ 142.745093][ T8434] do_syscall_64+0xb0/0x150 [ 142.749595][ T8434] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 142.755480][ T8434] [ 142.758745][ T8434] Local variable ----regs@__bpf_prog_run32 created at: [ 142.765593][ T8434] __bpf_prog_run32+0x87/0x170 [ 142.770356][ T8434] __bpf_prog_run32+0x87/0x170 [ 142.775121][ T8434] ===================================================== [ 142.782029][ T8434] Disabling lock debugging due to kernel taint [ 142.788163][ T8434] Kernel panic - not syncing: panic_on_warn set ... [ 142.794753][ T8434] CPU: 0 PID: 8434 Comm: syz-executor702 Tainted: G B 5.8.0-rc5-syzkaller #0 [ 142.804802][ T8434] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 142.814852][ T8434] Call Trace: [ 142.818138][ T8434] dump_stack+0x1df/0x240 [ 142.822475][ T8434] panic+0x3d5/0xc3e [ 142.826395][ T8434] kmsan_report+0x1df/0x1e0 [ 142.830902][ T8434] __msan_warning+0x58/0xa0 [ 142.835407][ T8434] bpf_skb_get_nlattr_nest+0x14c/0x2f0 [ 142.840870][ T8434] ___bpf_prog_run+0x214d/0x97a0 [ 142.845799][ T8434] ? __msan_metadata_ptr_for_store_4+0x13/0x20 [ 142.851972][ T8434] ? bpf_skb_get_nlattr+0x290/0x290 [ 142.857178][ T8434] __bpf_prog_run32+0x101/0x170 [ 142.862032][ T8434] ? kmsan_get_metadata+0x4f/0x180 [ 142.867148][ T8434] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 142.872948][ T8434] ? ___bpf_prog_run+0x97a0/0x97a0 [ 142.878043][ T8434] sk_filter_trim_cap+0x42a/0xcc0 [ 142.883066][ T8434] ? kmsan_get_metadata+0x11d/0x180 [ 142.888991][ T8434] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 142.894803][ T8434] unix_dgram_sendmsg+0x1987/0x3c30 [ 142.899999][ T8434] ? kmsan_get_metadata+0x11d/0x180 [ 142.905189][ T8434] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 142.911279][ T8434] unix_seqpacket_sendmsg+0x26c/0x2e0 [ 142.916643][ T8434] ? unix_dgram_peer_wake_me+0x7e0/0x7e0 [ 142.922285][ T8434] ____sys_sendmsg+0x1370/0x1400 [ 142.927233][ T8434] __sys_sendmsg+0x623/0x750 [ 142.931833][ T8434] ? security_socket_setsockopt+0x1a6/0x200 [ 142.937724][ T8434] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 142.943792][ T8434] ? kmsan_get_metadata+0x11d/0x180 [ 142.948999][ T8434] ? kmsan_get_metadata+0x11d/0x180 [ 142.954202][ T8434] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 142.959998][ T8434] ? __msan_metadata_ptr_for_store_4+0x13/0x20 [ 142.966145][ T8434] ? __prepare_exit_to_usermode+0x16c/0x4d0 [ 142.972049][ T8434] __se_sys_sendmsg+0x97/0xb0 [ 142.976739][ T8434] __x64_sys_sendmsg+0x4a/0x70 [ 142.981496][ T8434] do_syscall_64+0xb0/0x150 [ 142.985990][ T8434] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 142.991866][ T8434] RIP: 0033:0x440349 [ 142.995736][ T8434] Code: Bad RIP value. [ 142.999779][ T8434] RSP: 002b:00007ffe462dc5f8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 143.008175][ T8434] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440349 [ 143.016142][ T8434] RDX: 0000000000000000 RSI: 0000000020000480 RDI: 0000000000000003 [ 143.024120][ T8434] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 [ 143.033071][ T8434] R10: 0000000000000010 R11: 0000000000000246 R12: 0000000000401b50 [ 143.041039][ T8434] R13: 0000000000401be0 R14: 0000000000000000 R15: 0000000000000000 [ 143.050238][ T8434] Kernel Offset: 0xc600000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) [ 143.061953][ T8434] Rebooting in 86400 seconds..