[ 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 '10.128.1.66' (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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program 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: [ 63.376721] list_del corruption, ffff8880934d7738->next is LIST_POISON1 (dead000000000100) [ 63.385629] ------------[ cut here ]------------ [ 63.390370] kernel BUG at lib/list_debug.c:45! [ 63.394939] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 63.400295] CPU: 0 PID: 8952 Comm: syz-executor037 Not tainted 4.19.211-syzkaller #0 [ 63.408240] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 63.417685] RIP: 0010:__list_del_entry_valid.cold+0x23/0x4a [ 63.423382] 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 [ 63.442279] RSP: 0018:ffff8880934d7610 EFLAGS: 00010086 [ 63.447620] RAX: 000000000000004e RBX: ffff8880934d7720 RCX: 0000000000000000 [ 63.454868] RDX: 0000000000000000 RSI: ffffffff814dff01 RDI: ffffed101269aeb4 [ 63.462114] RBP: ffff8880934d7738 R08: 000000000000004e R09: 0000000000000000 [ 63.469369] R10: 0000000000000005 R11: 0000000000000000 R12: dead000000000200 [ 63.476617] R13: dead000000000100 R14: ffff8880934d7740 R15: 0000000000000007 [ 63.483866] FS: 00007f6faa93a700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 [ 63.492072] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 63.497930] CR2: 00007f6faa9fec38 CR3: 000000009300e000 CR4: 00000000003406f0 [ 63.505180] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 63.512433] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 63.519676] Call Trace: [ 63.522261] remove_wait_queue+0x2c/0x180 [ 63.526388] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 63.530948] tipc_send_group_bcast+0x317/0xa10 [ 63.535522] ? tipc_shutdown+0x310/0x310 [ 63.539564] ? __lock_acquire+0x6de/0x3ff0 [ 63.543777] ? do_wait_intr_irq+0x270/0x270 [ 63.548080] ? set_next_entity+0xb52/0x1dc0 [ 63.552380] ? __lock_acquire+0x6de/0x3ff0 [ 63.556594] __tipc_sendmsg+0xa2b/0x1320 [ 63.560637] ? mark_held_locks+0xf0/0xf0 [ 63.564681] ? rw_copy_check_uvector+0x27c/0x340 [ 63.569471] ? tipc_sendmcast+0xba0/0xba0 [ 63.573606] ? lock_sock_nested+0xa6/0x110 [ 63.577831] ? mark_held_locks+0xa6/0xf0 [ 63.581874] ? __local_bh_enable_ip+0x159/0x270 [ 63.586523] tipc_sendmsg+0x4c/0x70 [ 63.590133] ? __tipc_sendmsg+0x1320/0x1320 [ 63.594522] sock_sendmsg+0xc3/0x120 [ 63.598215] ___sys_sendmsg+0x3b3/0x8e0 [ 63.602180] ? copy_msghdr_from_user+0x440/0x440 [ 63.606919] ? mark_held_locks+0xf0/0xf0 [ 63.610956] ? __lock_acquire+0x6de/0x3ff0 [ 63.615168] ? __fget+0x32f/0x510 [ 63.618600] ? lock_downgrade+0x720/0x720 [ 63.622725] ? check_preemption_disabled+0x41/0x280 [ 63.627723] ? check_preemption_disabled+0x41/0x280 [ 63.632719] ? __fget+0x356/0x510 [ 63.636166] ? do_dup2+0x450/0x450 [ 63.639688] ? do_futex+0x171/0x1880 [ 63.643379] ? __fdget+0x1d0/0x230 [ 63.646894] __sys_sendmmsg+0x195/0x470 [ 63.650845] ? __ia32_sys_sendmsg+0x220/0x220 [ 63.655318] ? __local_bh_enable_ip+0x159/0x270 [ 63.659967] ? tipc_setsockopt+0x50a/0x9f0 [ 63.664182] ? __se_sys_futex+0x28f/0x3b0 [ 63.668307] ? __se_sys_futex+0x298/0x3b0 [ 63.672446] ? do_futex+0x1880/0x1880 [ 63.676235] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 63.681577] __x64_sys_sendmmsg+0x99/0x100 [ 63.685796] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 63.690368] do_syscall_64+0xf9/0x620 [ 63.694153] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 63.699322] RIP: 0033:0x7f6faa9a9a19 [ 63.703013] 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 [ 63.721892] RSP: 002b:00007f6faa93a318 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 [ 63.729584] RAX: ffffffffffffffda RBX: 00007f6faaa31418 RCX: 00007f6faa9a9a19 [ 63.736830] RDX: 0000000000000001 RSI: 00000000200030c0 RDI: 0000000000000003 [ 63.744076] RBP: 00007f6faaa31410 R08: 0000000000000000 R09: 0000000000000000 [ 63.751323] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f6faa9ff074 [ 63.758567] R13: 00007ffdd29e28af R14: 00007f6faa93a400 R15: 0000000000022000 [ 63.765813] Modules linked in: [ 63.769007] ---[ end trace 32abf8304eb0169e ]--- [ 63.773745] RIP: 0010:__list_del_entry_valid.cold+0x23/0x4a [ 63.779430] 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 [ 63.798307] RSP: 0018:ffff8880934d7610 EFLAGS: 00010086 [ 63.803645] RAX: 000000000000004e RBX: ffff8880934d7720 RCX: 0000000000000000 [ 63.810900] RDX: 0000000000000000 RSI: ffffffff814dff01 RDI: ffffed101269aeb4 [ 63.818322] RBP: ffff8880934d7738 R08: 000000000000004e R09: 0000000000000000 [ 63.825578] R10: 0000000000000005 R11: 0000000000000000 R12: dead000000000200 [ 63.832833] R13: dead000000000100 R14: ffff8880934d7740 R15: 0000000000000007 [ 63.840092] FS: 00007f6faa93a700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 [ 63.848299] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 63.854159] CR2: 00007f6faa9fec38 CR3: 000000009300e000 CR4: 00000000003406f0 [ 63.861407] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 63.868656] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 63.875903] Kernel panic - not syncing: Fatal exception [ 63.881489] Kernel Offset: disabled [ 63.885097] Rebooting in 86400 seconds..