[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.98' (ECDSA) to the list of known hosts. syzkaller login: [ 39.692419] audit: type=1400 audit(1603210668.023:8): avc: denied { execmem } for pid=6498 comm="syz-executor994" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 39.727090] hrtimer: interrupt took 74548 ns [ 39.971950] list_del corruption, ffff88809df7f738->next is LIST_POISON1 (dead000000000100) [ 39.980873] ------------[ cut here ]------------ [ 39.985628] kernel BUG at lib/list_debug.c:45! [ 39.990203] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 39.992238] list_del corruption, ffff8880a41f7738->next is LIST_POISON1 (dead000000000100) [ 39.995572] CPU: 0 PID: 6520 Comm: syz-executor994 Not tainted 4.19.152-syzkaller #0 [ 40.004304] ------------[ cut here ]------------ [ 40.011847] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 40.016586] kernel BUG at lib/list_debug.c:45! [ 40.025945] RIP: 0010:__list_del_entry_valid.cold+0x2c/0x43 [ 40.036193] Code: e2 48 c7 c7 a0 f6 51 88 e8 d3 a3 b8 fd 0f 0b 48 c7 c7 e0 4e 18 8a e8 76 73 13 00 4c 89 ea 48 c7 c7 40 f6 51 88 e8 b6 a3 b8 fd <0f> 0b 48 c7 c7 20 4f 18 8a e8 59 73 13 00 90 90 90 90 90 90 90 90 [ 40.056051] RSP: 0018:ffff88809df7f610 EFLAGS: 00010086 [ 40.061393] RAX: 000000000000004e RBX: ffff88809df7f720 RCX: 0000000000000000 [ 40.068644] RDX: 0000000000000000 RSI: ffffffff815b62af RDI: ffffed1013befeb4 [ 40.075903] RBP: ffff88812c3bf840 R08: 000000000000004e R09: 0000000000000000 [ 40.083167] R10: 0000000000000005 R11: 0000000000000002 R12: dead000000000200 [ 40.091491] R13: dead000000000100 R14: ffff88809df7f740 R15: 0000000000000007 [ 40.098753] FS: 00007fcd6bea9700(0000) GS:ffff8880ae200000(0000) knlGS:0000000000000000 [ 40.106963] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 40.112839] CR2: 00007fcd6bea8e78 CR3: 000000009a224000 CR4: 00000000001406f0 [ 40.120112] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 40.127384] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 40.134642] Call Trace: [ 40.137225] ? remove_wait_queue+0x1d/0x180 [ 40.141527] remove_wait_queue+0x2c/0x180 [ 40.145659] tipc_send_group_bcast+0x34f/0xa60 [ 40.150218] ? tipc_sk_timeout+0x5e0/0x5e0 [ 40.154443] ? do_wait_intr_irq+0x340/0x340 [ 40.158771] ? mark_held_locks+0xf0/0xf0 [ 40.162812] ? __lock_acquire+0x6ec/0x3ff0 [ 40.167025] __tipc_sendmsg+0xa2b/0x1320 [ 40.171077] ? mark_held_locks+0xf0/0xf0 [ 40.175118] ? lock_acquire+0x170/0x3f0 [ 40.179086] ? tipc_sendmcast+0xc10/0xc10 [ 40.183218] ? find_held_lock+0x2d/0x110 [ 40.187260] ? lock_sock_nested+0xa6/0x110 [ 40.191473] ? mark_held_locks+0xa6/0xf0 [ 40.195525] ? __local_bh_enable_ip+0x159/0x2a0 [ 40.200172] ? lockdep_hardirqs_on+0x3c1/0x5e0 [ 40.204735] tipc_sendmsg+0x4c/0x70 [ 40.208361] ? __tipc_sendmsg+0x1320/0x1320 [ 40.212662] sock_sendmsg+0xc7/0x130 [ 40.216352] ___sys_sendmsg+0x3b3/0x8f0 [ 40.220303] ? copy_msghdr_from_user+0x440/0x440 [ 40.225035] ? find_held_lock+0x2d/0x110 [ 40.229091] ? __fget+0x386/0x570 [ 40.232524] ? lock_downgrade+0x750/0x750 [ 40.236653] ? check_preemption_disabled+0x41/0x2b0 [ 40.241648] ? __fget+0x3ad/0x570 [ 40.245078] ? copy_fd_bitmaps+0x2c0/0x2c0 [ 40.249293] ? __fget_light+0x1d1/0x230 [ 40.253261] __sys_sendmmsg+0x195/0x470 [ 40.257214] ? __ia32_sys_sendmsg+0x220/0x220 [ 40.261688] ? mark_held_locks+0xf0/0xf0 [ 40.265729] ? find_held_lock+0x2d/0x110 [ 40.269781] ? finish_task_switch+0x174/0x8b0 [ 40.274269] ? lock_downgrade+0x750/0x750 [ 40.278415] ? ret_from_fork+0x8/0x30 [ 40.282207] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 40.287572] __x64_sys_sendmmsg+0x99/0x100 [ 40.291787] ? lockdep_hardirqs_on+0x3c1/0x5e0 [ 40.296361] do_syscall_64+0xf9/0x670 [ 40.300143] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 40.305323] RIP: 0033:0x446a09 [ 40.308493] Code: e8 0c e8 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 00 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 0f 83 db 06 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 40.327389] RSP: 002b:00007fcd6bea8db8 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 [ 40.335089] RAX: ffffffffffffffda RBX: 00000000006dbc38 RCX: 0000000000446a09 [ 40.342338] RDX: 08000000000000b0 RSI: 0000000020000a40 RDI: 0000000000000004 [ 40.349609] RBP: 00000000006dbc30 R08: 00007fcd6bea9700 R09: 0000000000000000 [ 40.356857] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc3c [ 40.364132] R13: 00007ffe587ab8ef R14: 00007fcd6bea99c0 R15: 000000000000002d [ 40.371389] Modules linked in: [ 40.374581] ---[ end trace 0274629412f205c4 ]--- [ 40.374619] invalid opcode: 0000 [#2] PREEMPT SMP KASAN [ 40.379342] RIP: 0010:__list_del_entry_valid.cold+0x2c/0x43 [ 40.384694] CPU: 1 PID: 6522 Comm: syz-executor994 Tainted: G D 4.19.152-syzkaller #0 [ 40.390387] Code: e2 48 c7 c7 a0 f6 51 88 e8 d3 a3 b8 fd 0f 0b 48 c7 c7 e0 4e 18 8a e8 76 73 13 00 4c 89 ea 48 c7 c7 40 f6 51 88 e8 b6 a3 b8 fd <0f> 0b 48 c7 c7 20 4f 18 8a e8 59 73 13 00 90 90 90 90 90 90 90 90 [ 40.399637] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 40.418708] RSP: 0018:ffff88809df7f610 EFLAGS: 00010086 [ 40.428068] RIP: 0010:__list_del_entry_valid.cold+0x2c/0x43 [ 40.433406] RAX: 000000000000004e RBX: ffff88809df7f720 RCX: 0000000000000000 [ 40.439104] Code: e2 48 c7 c7 a0 f6 51 88 e8 d3 a3 b8 fd 0f 0b 48 c7 c7 e0 4e 18 8a e8 76 73 13 00 4c 89 ea 48 c7 c7 40 f6 51 88 e8 b6 a3 b8 fd <0f> 0b 48 c7 c7 20 4f 18 8a e8 59 73 13 00 90 90 90 90 90 90 90 90 [ 40.446371] RDX: 0000000000000000 RSI: ffffffff815b62af RDI: ffffed1013befeb4 [ 40.465266] RSP: 0018:ffff8880a41f7610 EFLAGS: 00010086 [ 40.472524] RBP: ffff88812c3bf840 R08: 000000000000004e R09: 0000000000000000 [ 40.478739] RAX: 000000000000004e RBX: ffff8880a41f7720 RCX: 0000000000000000 [ 40.486007] R10: 0000000000000005 R11: 0000000000000002 R12: dead000000000200 [ 40.493299] RDX: 0000000000000000 RSI: ffffffff815b62af RDI: ffffed101483eeb4 [ 40.500588] R13: dead000000000100 R14: ffff88809df7f740 R15: 0000000000000007 [ 40.507848] RBP: ffff88809ec36240 R08: 000000000000004e R09: 0000000000000000 [ 40.515110] FS: 00007fcd6bea9700(0000) GS:ffff8880ae200000(0000) knlGS:0000000000000000 [ 40.522374] R10: 0000000000000005 R11: 000000001e407abb R12: dead000000000200 [ 40.530683] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 40.537954] R13: dead000000000100 R14: ffff8880a41f7740 R15: 0000000000000007 [ 40.543824] CR2: 00007fcd6bea8e78 CR3: 000000009a224000 CR4: 00000000001406f0 [ 40.551090] FS: 00007fcd6bea9700(0000) GS:ffff8880ae300000(0000) knlGS:0000000000000000 [ 40.558350] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 40.566568] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 40.573830] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 40.579699] CR2: 00000000004ccc50 CR3: 0000000094e69000 CR4: 00000000001406e0 [ 40.586956] Kernel panic - not syncing: Fatal exception [ 40.594216] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 40.606903] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 40.614161] Call Trace: [ 40.616752] ? remove_wait_queue+0x1d/0x180 [ 40.621073] remove_wait_queue+0x2c/0x180 [ 40.625217] tipc_send_group_bcast+0x34f/0xa60 [ 40.629795] ? tipc_sk_timeout+0x5e0/0x5e0 [ 40.634022] ? do_wait_intr_irq+0x340/0x340 [ 40.638341] ? mark_held_locks+0xf0/0xf0 [ 40.642399] ? __lock_acquire+0x6ec/0x3ff0 [ 40.646634] __tipc_sendmsg+0xa2b/0x1320 [ 40.650694] ? mark_held_locks+0xf0/0xf0 [ 40.654749] ? lock_acquire+0x170/0x3f0 [ 40.658716] ? tipc_sendmcast+0xc10/0xc10 [ 40.662861] ? find_held_lock+0x2d/0x110 [ 40.666917] ? lock_sock_nested+0xa6/0x110 [ 40.671155] ? mark_held_locks+0xa6/0xf0 [ 40.675212] ? __local_bh_enable_ip+0x159/0x2a0 [ 40.679885] ? lockdep_hardirqs_on+0x3c1/0x5e0 [ 40.685093] tipc_sendmsg+0x4c/0x70 [ 40.688719] ? __tipc_sendmsg+0x1320/0x1320 [ 40.693038] sock_sendmsg+0xc7/0x130 [ 40.696750] ___sys_sendmsg+0x3b3/0x8f0 [ 40.700724] ? copy_msghdr_from_user+0x440/0x440 [ 40.705476] ? find_held_lock+0x2d/0x110 [ 40.709553] ? __fget+0x386/0x570 [ 40.713006] ? lock_downgrade+0x750/0x750 [ 40.717155] ? check_preemption_disabled+0x41/0x2b0 [ 40.722173] ? __fget+0x3ad/0x570 [ 40.725623] ? copy_fd_bitmaps+0x2c0/0x2c0 [ 40.729887] ? __fget_light+0x1d1/0x230 [ 40.733861] __sys_sendmmsg+0x195/0x470 [ 40.737831] ? __ia32_sys_sendmsg+0x220/0x220 [ 40.742322] ? mark_held_locks+0xf0/0xf0 [ 40.746384] ? find_held_lock+0x2d/0x110 [ 40.750460] ? finish_task_switch+0x174/0x8b0 [ 40.754960] ? lock_downgrade+0x750/0x750 [ 40.759110] ? ret_from_fork+0x8/0x30 [ 40.763099] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 40.768461] __x64_sys_sendmmsg+0x99/0x100 [ 40.772692] ? lockdep_hardirqs_on+0x3c1/0x5e0 [ 40.777268] do_syscall_64+0xf9/0x670 [ 40.781071] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 40.786269] RIP: 0033:0x446a09 [ 40.789455] Code: e8 0c e8 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 00 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 0f 83 db 06 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 40.808357] RSP: 002b:00007fcd6bea8db8 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 [ 40.816064] RAX: ffffffffffffffda RBX: 00000000006dbc38 RCX: 0000000000446a09 [ 40.823326] RDX: 08000000000000b0 RSI: 0000000020000a40 RDI: 0000000000000004 [ 40.830591] RBP: 00000000006dbc30 R08: 00007fcd6bea9700 R09: 0000000000000000 [ 40.837855] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc3c [ 40.845117] R13: 00007ffe587ab8ef R14: 00007fcd6bea99c0 R15: 000000000000002d [ 40.853359] Modules linked in: [ 40.856551] ---[ end trace 0274629412f205c5 ]--- [ 40.861307] RIP: 0010:__list_del_entry_valid.cold+0x2c/0x43 [ 40.867019] Code: e2 48 c7 c7 a0 f6 51 88 e8 d3 a3 b8 fd 0f 0b 48 c7 c7 e0 4e 18 8a e8 76 73 13 00 4c 89 ea 48 c7 c7 40 f6 51 88 e8 b6 a3 b8 fd <0f> 0b 48 c7 c7 20 4f 18 8a e8 59 73 13 00 90 90 90 90 90 90 90 90 [ 40.885920] RSP: 0018:ffff88809df7f610 EFLAGS: 00010086 [ 40.891275] RAX: 000000000000004e RBX: ffff88809df7f720 RCX: 0000000000000000 [ 40.898535] RDX: 0000000000000000 RSI: ffffffff815b62af RDI: ffffed1013befeb4 [ 40.905797] RBP: ffff88812c3bf840 R08: 000000000000004e R09: 0000000000000000 [ 40.913060] R10: 0000000000000005 R11: 0000000000000002 R12: dead000000000200 [ 40.921279] R13: dead000000000100 R14: ffff88809df7f740 R15: 0000000000000007 [ 40.928542] FS: 00007fcd6bea9700(0000) GS:ffff8880ae300000(0000) knlGS:0000000000000000 [ 40.936774] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 40.942644] CR2: 00000000004ccc50 CR3: 0000000094e69000 CR4: 00000000001406e0 [ 40.949930] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 40.957191] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 41.710945] Shutting down cpus with NMI [ 41.715984] Kernel Offset: disabled [ 41.719605] Rebooting in 86400 seconds..