[ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.23' (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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program 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: [ 61.334907][ C0] traps: PANIC: double fault, error_code: 0x0 [ 61.334912][ C0] double fault: 0000 [#1] PREEMPT SMP KASAN [ 61.334918][ C0] CPU: 0 PID: 7280 Comm: syz-executor776 Not tainted 5.7.0-rc7-next-20200525-syzkaller #0 [ 61.334924][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 61.334928][ C0] RIP: 0010:fixup_bad_iret+0x24/0x170 [ 61.334938][ C0] Code: eb cb 0f 1f 40 00 41 55 49 bd 00 00 00 00 00 fc ff df 41 54 55 48 89 fd 48 c7 c7 80 8a 25 88 53 48 81 ec 40 01 00 00 48 89 e3 <48> c7 04 24 b3 8a b5 41 48 c7 44 24 08 bf d3 49 89 48 c1 eb 03 48 [ 61.334942][ C0] RSP: 0018:fffffe0000001fb8 EFLAGS: 00010086 [ 61.334950][ C0] RAX: fffffffffffffff7 RBX: fffffe0000001fb8 RCX: ffffffff87e00d57 [ 61.334955][ C0] RDX: 0000000000000000 RSI: ffffffff87e009c8 RDI: ffffffff88258a80 [ 61.334960][ C0] RBP: fffffe0000002120 R08: 0000000000000000 R09: 0000000000000000 [ 61.334965][ C0] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 61.334970][ C0] R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000000 [ 61.334976][ C0] FS: 0000000001f65880(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 61.334980][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 61.334985][ C0] CR2: fffffe0000001fa8 CR3: 00000000a02aa000 CR4: 00000000001406f0 [ 61.334990][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 61.334995][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 61.334998][ C0] Call Trace: [ 61.335001][ C0] [ 61.335014][ C0] error_entry+0xb8/0xc0 [ 61.335018][ C0] RIP: 0010:native_irq_return_iret+0x0/0x2 [ 61.335028][ C0] Code: 5a 41 59 41 58 58 59 5a 5e 5f 48 83 c4 08 e9 10 00 00 00 90 0f 1f 44 00 00 66 2e 0f 1f 84 00 00 00 00 00 f6 44 24 20 04 75 02 <48> cf 57 0f 01 f8 0f 1f 00 65 48 8b 3c 25 00 b0 01 00 48 89 07 48 [ 61.335032][ C0] RSP: 0018:fffffe00000021d8 EFLAGS: 00010046 ORIG_RAX: 0000000000000000 [ 61.335041][ C0] RAX: fffffffffffffff7 RBX: 0000000000000000 RCX: 0000000000000000 [ 61.335046][ C0] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000100 [ 61.335051][ C0] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 61.335056][ C0] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 61.335061][ C0] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 61.335065][ C0] ? asm_exc_general_protection+0x8/0x30 [ 61.335068][ C0] RIP: 0033:0x3bfd19e0df38d197 [ 61.335071][ C0] Code: Bad RIP value. [ 61.335076][ C0] RSP: 002b:00007fffaaa547c8 EFLAGS: 00000346 [ 61.335079][ C0] Modules linked in: [ 61.591964][ C0] ---[ end trace d6561a908e3835a1 ]--- [ 61.591969][ C0] RIP: 0010:fixup_bad_iret+0x24/0x170 [ 61.591980][ C0] Code: eb cb 0f 1f 40 00 41 55 49 bd 00 00 00 00 00 fc ff df 41 54 55 48 89 fd 48 c7 c7 80 8a 25 88 53 48 81 ec 40 01 00 00 48 89 e3 <48> c7 04 24 b3 8a b5 41 48 c7 44 24 08 bf d3 49 89 48 c1 eb 03 48 [ 61.591983][ C0] RSP: 0018:fffffe0000001fb8 EFLAGS: 00010086 [ 61.591991][ C0] RAX: fffffffffffffff7 RBX: fffffe0000001fb8 RCX: ffffffff87e00d57 [ 61.591996][ C0] RDX: 0000000000000000 RSI: ffffffff87e009c8 RDI: ffffffff88258a80 [ 61.592001][ C0] RBP: fffffe0000002120 R08: 0000000000000000 R09: 0000000000000000 [ 61.592006][ C0] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 61.592011][ C0] R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000000 [ 61.592016][ C0] FS: 0000000001f65880(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 61.592021][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 61.592026][ C0] CR2: fffffe0000001fa8 CR3: 00000000a02aa000 CR4: 00000000001406f0 [ 61.592030][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 61.592035][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 61.592040][ C0] Kernel panic - not syncing: Fatal exception in interrupt [ 61.593064][ C0] Kernel Offset: disabled