[ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ OK ] Started Serial Getty on ttyS0. [ OK ] Reached target Login Prompts. [ OK ] Started OpenBSD Secure Shell server. [ OK ] Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.32' (ECDSA) to the list of known hosts. executing program executing program executing program executing program syzkaller login: [ 32.011487] hrtimer: interrupt took 29780 ns 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 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 [ 36.642286] list_del corruption, ffff8880946af738->next is LIST_POISON1 (dead000000000100) [ 36.651051] ------------[ cut here ]------------ [ 36.655790] kernel BUG at lib/list_debug.c:45! [ 36.660386] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 36.665733] CPU: 0 PID: 8973 Comm: syz-executor139 Not tainted 4.19.211-syzkaller #0 [ 36.673601] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 36.682953] RIP: 0010:__list_del_entry_valid.cold+0x23/0x4a [ 36.688643] 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 [ 36.707526] RSP: 0018:ffff8880946af610 EFLAGS: 00010086 [ 36.712911] RAX: 000000000000004e RBX: ffff8880946af720 RCX: 0000000000000000 [ 36.720160] RDX: 0000000000000000 RSI: ffffffff814dff01 RDI: ffffed10128d5eb4 [ 36.727408] RBP: ffff8880946af738 R08: 000000000000004e R09: 0000000000000000 [ 36.734658] R10: 0000000000000005 R11: 0000000000000000 R12: dead000000000200 [ 36.741908] R13: dead000000000100 R14: ffff8880946af740 R15: 0000000000000007 [ 36.749166] FS: 00007f5cd5f59700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 [ 36.757376] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 36.763246] CR2: 0000000000000000 CR3: 00000000a9b3d000 CR4: 00000000003406f0 [ 36.770501] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 36.777750] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 36.785008] Call Trace: [ 36.787585] remove_wait_queue+0x2c/0x180 [ 36.791714] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 36.796288] tipc_send_group_bcast+0x317/0xa10 [ 36.800853] ? tipc_shutdown+0x310/0x310 [ 36.804895] ? __lock_acquire+0x6de/0x3ff0 [ 36.809110] ? do_wait_intr_irq+0x270/0x270 [ 36.813413] ? __lock_acquire+0x6de/0x3ff0 [ 36.817635] __tipc_sendmsg+0xa2b/0x1320 [ 36.821698] ? mark_held_locks+0xf0/0xf0 [ 36.825740] ? rw_copy_check_uvector+0x27c/0x340 [ 36.830478] ? tipc_sendmcast+0xba0/0xba0 [ 36.834606] ? lock_sock_nested+0xa6/0x110 [ 36.838823] ? mark_held_locks+0xa6/0xf0 [ 36.842864] ? __local_bh_enable_ip+0x159/0x270 [ 36.847515] tipc_sendmsg+0x4c/0x70 [ 36.851120] ? __tipc_sendmsg+0x1320/0x1320 [ 36.855428] sock_sendmsg+0xc3/0x120 [ 36.859123] ___sys_sendmsg+0x3b3/0x8e0 [ 36.863082] ? lock_downgrade+0x720/0x720 [ 36.867212] ? copy_msghdr_from_user+0x440/0x440 [ 36.871947] ? __fget+0x32f/0x510 [ 36.875382] ? lock_downgrade+0x720/0x720 [ 36.879522] ? check_preemption_disabled+0x41/0x280 [ 36.884540] ? check_preemption_disabled+0x41/0x280 [ 36.889549] ? __fget+0x356/0x510 [ 36.892984] ? do_dup2+0x450/0x450 [ 36.896503] ? do_futex+0x171/0x1880 [ 36.900209] ? __fdget+0x1d0/0x230 [ 36.903731] __sys_sendmmsg+0x195/0x470 [ 36.907692] ? __ia32_sys_sendmsg+0x220/0x220 [ 36.912173] ? __local_bh_enable_ip+0x159/0x270 [ 36.916826] ? tipc_setsockopt+0x50a/0x9f0 [ 36.921048] ? __se_sys_futex+0x28f/0x3b0 [ 36.925175] ? __se_sys_futex+0x298/0x3b0 [ 36.929305] ? do_futex+0x1880/0x1880 [ 36.933085] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 36.938428] __x64_sys_sendmmsg+0x99/0x100 [ 36.942740] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 36.947298] do_syscall_64+0xf9/0x620 [ 36.951079] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 36.956247] RIP: 0033:0x7f5cd5fc8ba9 [ 36.959937] 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 [ 36.978813] RSP: 002b:00007f5cd5f59318 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 [ 36.986584] RAX: ffffffffffffffda RBX: 00007f5cd6050418 RCX: 00007f5cd5fc8ba9 [ 36.993834] RDX: 0000000000000001 RSI: 00000000200030c0 RDI: 0000000000000004 [ 37.001080] RBP: 00007f5cd6050410 R08: 0000000000000000 R09: 0000000000000000 [ 37.008332] R10: 1000000000000000 R11: 0000000000000246 R12: 00007f5cd601e074 [ 37.015580] R13: 00007ffc78eb1d9f R14: 00007f5cd5f59400 R15: 0000000000022000 [ 37.022831] Modules linked in: [ 37.026006] ---[ end trace bb9f8cc6c54c995c ]--- [ 37.030744] RIP: 0010:__list_del_entry_valid.cold+0x23/0x4a [ 37.036430] 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 [ 37.055413] RSP: 0018:ffff8880946af610 EFLAGS: 00010086 [ 37.060754] RAX: 000000000000004e RBX: ffff8880946af720 RCX: 0000000000000000 [ 37.068002] RDX: 0000000000000000 RSI: ffffffff814dff01 RDI: ffffed10128d5eb4 [ 37.075250] RBP: ffff8880946af738 R08: 000000000000004e R09: 0000000000000000 [ 37.082497] R10: 0000000000000005 R11: 0000000000000000 R12: dead000000000200 [ 37.089743] R13: dead000000000100 R14: ffff8880946af740 R15: 0000000000000007 [ 37.096991] FS: 00007f5cd5f59700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 [ 37.105196] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 37.111054] CR2: 0000000000000000 CR3: 00000000a9b3d000 CR4: 00000000003406f0 [ 37.118303] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 37.125552] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 37.132799] Kernel panic - not syncing: Fatal exception [ 37.138306] Kernel Offset: disabled [ 37.141915] Rebooting in 86400 seconds..