[ OK ] Started Getty on tty1. [ OK ] Found device /dev/ttyS0. [ OK ] Started Serial Getty on ttyS0. [ OK ] Reached target Login Prompts. [ OK ] Started OpenBSD Secure Shell server. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.210' (ECDSA) to the list of known hosts. syzkaller login: [ 44.258198][ T6793] IPVS: ftp: loaded support on port[0] = 21 executing program [ 45.325993][ T6818] general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] PREEMPT SMP KASAN [ 45.337718][ T6818] KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017] [ 45.346116][ T6818] CPU: 0 PID: 6818 Comm: kworker/u5:1 Not tainted 5.8.0-rc7-syzkaller #0 [ 45.354523][ T6818] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 45.364573][ T6818] Workqueue: hci0 hci_rx_work [ 45.369260][ T6818] RIP: 0010:hci_event_packet+0x8386/0x18260 [ 45.375155][ T6818] Code: c1 e8 03 49 be 00 00 00 00 00 fc ff df 42 80 3c 30 00 74 08 48 89 df e8 58 9a 5e fa 48 8b 1b 48 83 c3 10 48 89 d8 48 c1 e8 03 <42> 80 3c 30 00 74 08 48 89 df e8 3b 9a 5e fa 48 8b 1b 48 89 d8 48 [ 45.394740][ T6818] RSP: 0018:ffffc900015d7ac8 EFLAGS: 00010202 [ 45.400803][ T6818] RAX: 0000000000000002 RBX: 0000000000000010 RCX: dffffc0000000000 [ 45.408772][ T6818] RDX: ffff8880a8df00c0 RSI: 0000000000000000 RDI: 0000000000000000 [ 45.416764][ T6818] RBP: ffff888091c4a000 R08: ffffffff875506b4 R09: fffffbfff131a9a6 [ 45.424715][ T6818] R10: fffffbfff131a9a6 R11: 0000000000000000 R12: ffff888092e18010 [ 45.432660][ T6818] R13: ffff888092e19110 R14: dffffc0000000000 R15: ffff888092e18000 [ 45.440601][ T6818] FS: 0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 45.449496][ T6818] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 45.456049][ T6818] CR2: 00007ffc85c0e2f8 CR3: 00000000a84da000 CR4: 00000000001406f0 [ 45.464024][ T6818] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 45.471965][ T6818] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 45.479908][ T6818] Call Trace: [ 45.483169][ T6818] ? trace_lock_release+0x137/0x1a0 [ 45.488338][ T6818] ? _raw_spin_unlock_irqrestore+0x6f/0xd0 [ 45.494112][ T6818] ? lockdep_hardirqs_on+0x38/0xe0 [ 45.499192][ T6818] hci_rx_work+0x236/0x9c0 [ 45.503599][ T6818] process_one_work+0x789/0xfc0 [ 45.508433][ T6818] worker_thread+0xaa4/0x1460 [ 45.513099][ T6818] kthread+0x37e/0x3a0 [ 45.517139][ T6818] ? rcu_lock_release+0x20/0x20 [ 45.521955][ T6818] ? kthread_blkcg+0xd0/0xd0 [ 45.526519][ T6818] ret_from_fork+0x1f/0x30 [ 45.530899][ T6818] Modules linked in: [ 45.535484][ T6818] ---[ end trace 84fffd59c54efef2 ]--- [ 45.540940][ T6818] RIP: 0010:hci_event_packet+0x8386/0x18260 [ 45.546914][ T6818] Code: c1 e8 03 49 be 00 00 00 00 00 fc ff df 42 80 3c 30 00 74 08 48 89 df e8 58 9a 5e fa 48 8b 1b 48 83 c3 10 48 89 d8 48 c1 e8 03 <42> 80 3c 30 00 74 08 48 89 df e8 3b 9a 5e fa 48 8b 1b 48 89 d8 48 [ 45.566840][ T6818] RSP: 0018:ffffc900015d7ac8 EFLAGS: 00010202 [ 45.572918][ T6818] RAX: 0000000000000002 RBX: 0000000000000010 RCX: dffffc0000000000 [ 45.580871][ T6818] RDX: ffff8880a8df00c0 RSI: 0000000000000000 RDI: 0000000000000000 [ 45.588868][ T6818] RBP: ffff888091c4a000 R08: ffffffff875506b4 R09: fffffbfff131a9a6 [ 45.596877][ T6818] R10: fffffbfff131a9a6 R11: 0000000000000000 R12: ffff888092e18010 [ 45.604919][ T6818] R13: ffff888092e19110 R14: dffffc0000000000 R15: ffff888092e18000 [ 45.612951][ T6818] FS: 0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 45.621857][ T6818] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 45.628456][ T6818] CR2: 00007ffc85c0e2f8 CR3: 00000000a84da000 CR4: 00000000001406f0 [ 45.636474][ T6818] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 45.644471][ T6818] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 45.652485][ T6818] Kernel panic - not syncing: Fatal exception [ 45.659490][ T6818] Kernel Offset: disabled [ 45.663810][ T6818] Rebooting in 86400 seconds..