[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.34' (ECDSA) to the list of known hosts. syzkaller login: [ 34.229493] IPVS: ftp: loaded support on port[0] = 21 executing program [ 34.581454] list_del corruption, ffff8880a2277738->next is LIST_POISON1 (dead000000000100) [ 34.590199] ------------[ cut here ]------------ [ 34.594941] kernel BUG at lib/list_debug.c:45! [ 34.599509] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 34.604926] CPU: 1 PID: 8107 Comm: syz-executor382 Not tainted 4.19.211-syzkaller #0 [ 34.612782] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 34.622124] RIP: 0010:__list_del_entry_valid.cold+0x23/0x4a [ 34.627811] 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 [ 34.646690] RSP: 0018:ffff8880a2277610 EFLAGS: 00010086 [ 34.652028] RAX: 000000000000004e RBX: ffff8880a2277720 RCX: 0000000000000000 [ 34.659276] RDX: 0000000000000000 RSI: ffffffff814dff01 RDI: ffffed101444eeb4 [ 34.666536] RBP: ffff8880a2277738 R08: 000000000000004e R09: 0000000000000000 [ 34.673790] R10: 0000000000000005 R11: 0000000000000000 R12: dead000000000200 [ 34.681035] R13: dead000000000100 R14: ffff8880a2277740 R15: 0000000000000007 [ 34.688283] FS: 00007f7e4d378700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 [ 34.696486] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 34.702359] CR2: 0000000020000440 CR3: 000000009b34e000 CR4: 00000000003406e0 [ 34.709609] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 34.716860] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 34.724107] Call Trace: [ 34.726680] remove_wait_queue+0x2c/0x180 [ 34.730808] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 34.735372] tipc_send_group_bcast+0x317/0xa10 [ 34.739937] ? tipc_shutdown+0x310/0x310 [ 34.743978] ? __lock_acquire+0x6de/0x3ff0 [ 34.748191] ? do_wait_intr_irq+0x270/0x270 [ 34.752508] ? __lock_acquire+0x6de/0x3ff0 [ 34.756723] __tipc_sendmsg+0xa2b/0x1320 [ 34.760788] ? mark_held_locks+0xf0/0xf0 [ 34.764831] ? rw_copy_check_uvector+0x27c/0x340 [ 34.769566] ? tipc_sendmcast+0xba0/0xba0 [ 34.773693] ? lock_sock_nested+0xa6/0x110 [ 34.777910] ? mark_held_locks+0xa6/0xf0 [ 34.781950] ? __local_bh_enable_ip+0x159/0x270 [ 34.786599] tipc_sendmsg+0x4c/0x70 [ 34.790204] ? __tipc_sendmsg+0x1320/0x1320 [ 34.794506] sock_sendmsg+0xc3/0x120 [ 34.798202] ___sys_sendmsg+0x3b3/0x8e0 [ 34.802154] ? copy_msghdr_from_user+0x440/0x440 [ 34.806891] ? __fget+0x32f/0x510 [ 34.810322] ? mark_held_locks+0xf0/0xf0 [ 34.814362] ? lock_downgrade+0x720/0x720 [ 34.818502] ? check_preemption_disabled+0x41/0x280 [ 34.823502] ? check_preemption_disabled+0x41/0x280 [ 34.828500] ? __fget+0x356/0x510 [ 34.831939] ? __might_fault+0x11f/0x1d0 [ 34.835989] ? lock_downgrade+0x720/0x720 [ 34.840121] ? lock_acquire+0x170/0x3c0 [ 34.844081] __sys_sendmmsg+0x195/0x470 [ 34.848042] ? __ia32_sys_sendmsg+0x220/0x220 [ 34.852534] ? finish_task_switch+0x146/0x760 [ 34.857006] ? dnotify_flush+0x75/0x2d0 [ 34.860962] ? __se_sys_futex+0x28f/0x3b0 [ 34.865087] ? __se_sys_futex+0x298/0x3b0 [ 34.869213] ? do_futex+0x1880/0x1880 [ 34.872999] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 34.878341] __x64_sys_sendmmsg+0x99/0x100 [ 34.882557] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 34.887120] do_syscall_64+0xf9/0x620 [ 34.890901] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 34.896066] RIP: 0033:0x7f7e4d3efa59 [ 34.899757] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 91 18 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 [ 34.918633] RSP: 002b:00007f7e4d378318 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 [ 34.926315] RAX: ffffffffffffffda RBX: 00007f7e4d4713f8 RCX: 00007f7e4d3efa59 [ 34.933564] RDX: 0000000000000092 RSI: 00000000200030c0 RDI: 0000000000000003 [ 34.940819] RBP: 00007f7e4d4713f0 R08: 0000000000000000 R09: 0000000000000000 [ 34.948090] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f7e4d43e378 [ 34.955591] R13: 00007fff3c4e92ef R14: 00007f7e4d378400 R15: 0000000000022000 [ 34.962844] Modules linked in: [ 34.966053] ---[ end trace c45c51b6da36626c ]--- [ 34.970802] RIP: 0010:__list_del_entry_valid.cold+0x23/0x4a [ 34.976496] 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 [ 34.995374] RSP: 0018:ffff8880a2277610 EFLAGS: 00010086 [ 35.000716] RAX: 000000000000004e RBX: ffff8880a2277720 RCX: 0000000000000000 [ 35.007961] RDX: 0000000000000000 RSI: ffffffff814dff01 RDI: ffffed101444eeb4 [ 35.015223] RBP: ffff8880a2277738 R08: 000000000000004e R09: 0000000000000000 [ 35.022485] R10: 0000000000000005 R11: 0000000000000000 R12: dead000000000200 [ 35.029732] R13: dead000000000100 R14: ffff8880a2277740 R15: 0000000000000007 [ 35.036982] FS: 00007f7e4d378700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 [ 35.045183] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 35.051041] CR2: 0000000020000440 CR3: 000000009b34e000 CR4: 00000000003406e0 [ 35.058291] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 35.065537] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 35.072784] Kernel panic - not syncing: Fatal exception [ 35.078301] Kernel Offset: disabled [ 35.081914] Rebooting in 86400 seconds..