Starting Update UTMP about System Runlevel Changes... [ OK ] Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch. 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 '10.128.1.58' (ECDSA) to the list of known hosts. syzkaller login: [ 40.492190] audit: type=1400 audit(1596659484.522:8): avc: denied { execmem } for pid=6462 comm="syz-executor370" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 40.519356] IPVS: ftp: loaded support on port[0] = 21 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 42.689263] list_del corruption, ffff8880a13dcdc8->next is LIST_POISON1 (dead000000000100) [ 42.698189] ------------[ cut here ]------------ [ 42.702943] kernel BUG at lib/list_debug.c:45! [ 42.707617] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 42.712985] CPU: 0 PID: 6490 Comm: kworker/u5:2 Not tainted 4.19.137-syzkaller #0 [ 42.720590] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.733244] Workqueue: hci0 hci_rx_work [ 42.737214] RIP: 0010:__list_del_entry_valid.cold+0x23/0x55 [ 42.742927] Code: e8 56 27 f4 fd 0f 0b 48 89 ee 48 c7 c7 c0 08 cb 87 e8 45 27 f4 fd 0f 0b 4c 89 ea 48 89 ee 48 c7 c7 00 08 cb 87 e8 31 27 f4 fd <0f> 0b 4c 89 e2 48 89 ee 48 c7 c7 60 08 cb 87 e8 1d 27 f4 fd 0f 0b [ 42.761825] RSP: 0018:ffff8880a5c07920 EFLAGS: 00010286 [ 42.767176] RAX: 000000000000004e RBX: 0000000000000001 RCX: 0000000000000000 [ 42.774439] RDX: 0000000000000000 RSI: ffffffff8154cf41 RDI: ffffed1014b80f16 [ 42.781700] RBP: ffff8880a13dcdc8 R08: 000000000000004e R09: 0000000000000000 [ 42.788963] R10: 0000000000000005 R11: 0000000000000000 R12: dead000000000200 [ 42.796224] R13: dead000000000100 R14: ffff8880a13dc980 R15: 0000000000000000 [ 42.803490] FS: 0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 42.811704] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 42.817574] CR2: 00000000006e06c0 CR3: 00000000a4299000 CR4: 00000000001406f0 [ 42.824866] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 42.832127] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 42.839402] Call Trace: [ 42.842000] l2cap_chan_put+0x5e/0x1c0 [ 42.845891] l2cap_recv_frame+0xd36/0xa550 [ 42.850128] ? __lock_acquire+0x6de/0x3ff0 [ 42.854360] ? mark_held_locks+0xf0/0xf0 [ 42.858422] ? __lock_acquire+0x6de/0x3ff0 [ 42.862709] ? l2cap_ertm_init+0xa60/0xa60 [ 42.867019] ? __lock_acquire+0x6de/0x3ff0 [ 42.871316] ? lock_acquire+0x170/0x3c0 [ 42.875355] ? hci_rx_work+0x2e4/0xa90 [ 42.879282] ? hci_rx_work+0x426/0xa90 [ 42.883295] ? lock_downgrade+0x720/0x720 [ 42.887484] ? hci_rx_work+0x2e4/0xa90 [ 42.891384] ? __mutex_add_waiter+0x160/0x160 [ 42.895903] ? __mutex_unlock_slowpath+0xea/0x610 [ 42.900758] ? hci_conn_enter_active_mode+0x19c/0x2c0 [ 42.905960] l2cap_recv_acldata+0x80e/0x910 [ 42.910329] hci_rx_work+0x455/0xa90 [ 42.914087] process_one_work+0x864/0x1570 [ 42.918393] ? pwq_dec_nr_in_flight+0x2d0/0x2d0 [ 42.923071] worker_thread+0x64c/0x1130 [ 42.927058] ? __kthread_parkme+0xfd/0x1b0 [ 42.931307] ? process_one_work+0x1570/0x1570 [ 42.935827] kthread+0x30b/0x410 [ 42.939248] ? kthread_park+0x180/0x180 [ 42.943332] ret_from_fork+0x24/0x30 [ 42.947124] Modules linked in: [ 42.950511] ---[ end trace a61177bc845fce54 ]--- [ 42.955295] RIP: 0010:__list_del_entry_valid.cold+0x23/0x55 [ 42.961084] Code: e8 56 27 f4 fd 0f 0b 48 89 ee 48 c7 c7 c0 08 cb 87 e8 45 27 f4 fd 0f 0b 4c 89 ea 48 89 ee 48 c7 c7 00 08 cb 87 e8 31 27 f4 fd <0f> 0b 4c 89 e2 48 89 ee 48 c7 c7 60 08 cb 87 e8 1d 27 f4 fd 0f 0b [ 42.980107] RSP: 0018:ffff8880a5c07920 EFLAGS: 00010286 [ 42.985553] RAX: 000000000000004e RBX: 0000000000000001 RCX: 0000000000000000 [ 42.992877] RDX: 0000000000000000 RSI: ffffffff8154cf41 RDI: ffffed1014b80f16 [ 43.000232] RBP: ffff8880a13dcdc8 R08: 000000000000004e R09: 0000000000000000 [ 43.007543] R10: 0000000000000005 R11: 0000000000000000 R12: dead000000000200 [ 43.014924] R13: dead000000000100 R14: ffff8880a13dc980 R15: 0000000000000000 [ 43.022284] FS: 0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 43.030624] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 43.036575] CR2: 00000000006e06c0 CR3: 00000000a4299000 CR4: 00000000001406f0 [ 43.044032] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 43.051467] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 43.058734] Kernel panic - not syncing: Fatal exception [ 43.065102] Kernel Offset: disabled [ 43.068725] Rebooting in 86400 seconds..