[ 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 '10.128.1.57' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program syzkaller login: [ 41.996809] list_del corruption, ffff8880956b7a70->next is LIST_POISON1 (dead000000000100) [ 42.005772] ------------[ cut here ]------------ [ 42.010534] kernel BUG at lib/list_debug.c:45! [ 42.015124] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 42.020491] CPU: 1 PID: 8656 Comm: syz-executor559 Not tainted 4.19.211-syzkaller #0 [ 42.028369] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.037729] RIP: 0010:__list_del_entry_valid.cold+0x23/0x4a executing program [ 42.043436] Code: e8 11 43 f7 ff 0f 0b 48 89 ee 48 c7 c7 40 e4 b3 88 e8 00 43 f7 ff 0f 0b 4c 89 ea 48 89 ee 48 c7 c7 80 e3 b3 88 e8 ec 42 f7 ff <0f> 0b 4c 89 e2 48 89 ee 48 c7 c7 e0 e3 b3 88 e8 d8 42 f7 ff 0f 0b [ 42.062321] RSP: 0018:ffff8880956b7950 EFLAGS: 00010086 [ 42.067662] RAX: 000000000000004e RBX: ffff8880956b7a58 RCX: 0000000000000000 [ 42.074910] RDX: 0000000000000000 RSI: ffffffff814dff01 RDI: ffffed1012ad6f1c [ 42.082162] RBP: ffff8880956b7a70 R08: 000000000000004e R09: 0000000000000000 [ 42.089407] R10: 0000000000000005 R11: 0000000000000000 R12: dead000000000200 [ 42.096651] R13: dead000000000100 R14: ffff8880956b7a78 R15: 0000000000000007 [ 42.103910] FS: 00007feb725d2700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 [ 42.112124] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 42.117995] CR2: 0000000020c00000 CR3: 00000000a3385000 CR4: 00000000003406e0 [ 42.125264] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 42.132523] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 42.139795] Call Trace: [ 42.142363] remove_wait_queue+0x2c/0x180 executing program [ 42.146486] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 42.151047] __tipc_sendstream+0x373/0x9d0 [ 42.155260] ? tipc_sendmsg+0x70/0x70 [ 42.159053] ? do_wait_intr_irq+0x270/0x270 [ 42.163364] ? mark_held_locks+0xa6/0xf0 [ 42.167420] ? __local_bh_enable_ip+0x159/0x270 [ 42.172082] tipc_sendstream+0x4c/0x70 [ 42.175959] ? __tipc_sendstream+0x9d0/0x9d0 [ 42.180356] sock_sendmsg+0xc3/0x120 [ 42.184048] ___sys_sendmsg+0x7bb/0x8e0 [ 42.188000] ? copy_msghdr_from_user+0x440/0x440 [ 42.192733] ? __fget+0x32f/0x510 [ 42.196170] ? lock_downgrade+0x720/0x720 [ 42.200303] ? check_preemption_disabled+0x41/0x280 [ 42.205298] ? check_preemption_disabled+0x41/0x280 [ 42.210293] ? __fget+0x356/0x510 [ 42.213722] ? do_dup2+0x450/0x450 [ 42.217241] ? __fdget+0x1d0/0x230 [ 42.220789] __x64_sys_sendmsg+0x132/0x220 [ 42.225015] ? __sys_sendmsg+0x1b0/0x1b0 [ 42.229083] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 42.234444] ? trace_hardirqs_off_caller+0x6e/0x210 [ 42.239461] ? do_syscall_64+0x21/0x620 [ 42.243435] do_syscall_64+0xf9/0x620 [ 42.247233] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 42.252411] RIP: 0033:0x7feb72662a49 [ 42.256117] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 11 15 00 00 90 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 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 [ 42.275005] RSP: 002b:00007feb725d2318 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 42.282690] RAX: ffffffffffffffda RBX: 00007feb726ea428 RCX: 00007feb72662a49 [ 42.289936] RDX: 0000000000000000 RSI: 0000000020000240 RDI: 0000000000000004 [ 42.297180] RBP: 00007feb726ea420 R08: 00007feb725d2700 R09: 0000000000000000 [ 42.304425] R10: 00007feb725d2700 R11: 0000000000000246 R12: 00007feb726ea42c [ 42.311671] R13: 00007ffe1b420aff R14: 00007feb725d2400 R15: 0000000000022000 [ 42.318926] Modules linked in: [ 42.322118] ---[ end trace 54dd77b7223492f5 ]--- [ 42.326862] RIP: 0010:__list_del_entry_valid.cold+0x23/0x4a executing program [ 42.332578] Code: e8 11 43 f7 ff 0f 0b 48 89 ee 48 c7 c7 40 e4 b3 88 e8 00 43 f7 ff 0f 0b 4c 89 ea 48 89 ee 48 c7 c7 80 e3 b3 88 e8 ec 42 f7 ff <0f> 0b 4c 89 e2 48 89 ee 48 c7 c7 e0 e3 b3 88 e8 d8 42 f7 ff 0f 0b [ 42.351457] RSP: 0018:ffff8880956b7950 EFLAGS: 00010086 [ 42.356802] RAX: 000000000000004e RBX: ffff8880956b7a58 RCX: 0000000000000000 [ 42.364048] RDX: 0000000000000000 RSI: ffffffff814dff01 RDI: ffffed1012ad6f1c [ 42.371301] RBP: ffff8880956b7a70 R08: 000000000000004e R09: 0000000000000000 [ 42.378554] R10: 0000000000000005 R11: 0000000000000000 R12: dead000000000200 [ 42.385807] R13: dead000000000100 R14: ffff8880956b7a78 R15: 0000000000000007 [ 42.393056] FS: 00007feb725d2700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 [ 42.401266] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 42.407143] CR2: 0000000020c00000 CR3: 00000000a3385000 CR4: 00000000003406e0 [ 42.414391] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 42.421637] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 42.428890] Kernel panic - not syncing: Fatal exception [ 42.434448] Kernel Offset: disabled [ 42.438058] Rebooting in 86400 seconds..