[ 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 '10.128.0.16' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 85.219230][ T28] audit: type=1400 audit(1593165404.503:8): avc: denied { execmem } for pid=6825 comm="syz-executor108" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 85.225400][ C1] traps: PANIC: double fault, error_code: 0x0 [ 85.225405][ C1] double fault: 0000 [#1] PREEMPT SMP KASAN [ 85.225416][ C1] CPU: 1 PID: 6826 Comm: syz-executor108 Not tainted 5.8.0-rc2-syzkaller #0 [ 85.225422][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 85.225425][ C1] RIP: 0010:fixup_bad_iret+0x24/0x170 [ 85.225437][ C1] 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 e0 83 45 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 4f 96 66 89 48 c1 eb 03 48 [ 85.225440][ C1] RSP: 0018:fffffe0000036fb8 EFLAGS: 00010086 [ 85.225448][ C1] RAX: 0000000000000000 RBX: fffffe0000036fb8 RCX: ffffffff88000e87 [ 85.225452][ C1] RDX: 0000000000000000 RSI: ffffffff880009a8 RDI: ffffffff884583e0 [ 85.225457][ C1] RBP: fffffe0000037120 R08: 0000000000000000 R09: 0000000000000000 [ 85.225462][ C1] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 85.225467][ C1] R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000000 [ 85.225473][ C1] FS: 0000000000e47880(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 85.225477][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 85.225482][ C1] CR2: fffffe0000036fa8 CR3: 000000009f9e1000 CR4: 00000000001406e0 [ 85.225487][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 85.225492][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 85.225494][ C1] Call Trace: [ 85.225497][ C1] [ 85.225500][ C1] error_entry+0xb8/0xc0 [ 85.225504][ C1] RIP: 0010:native_irq_return_iret+0x0/0x2 [ 85.225515][ C1] 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 90 01 00 48 89 07 48 [ 85.225519][ C1] RSP: 0018:fffffe00000371d8 EFLAGS: 00010046 ORIG_RAX: 0000000000000000 [ 85.225527][ C1] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 85.225532][ C1] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000100 [ 85.225537][ C1] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 85.225541][ C1] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 85.225546][ C1] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 85.225550][ C1] ? asm_exc_general_protection+0x8/0x30 [ 85.225553][ C1] RIP: 0033:0x273c050000075366 [ 85.225556][ C1] Code: Bad RIP value. [ 85.225560][ C1] RSP: 002b:00007ffec432c4a8 EFLAGS: 00000346 [ 85.225563][ C1] Modules linked in: [ 85.225649][ C1] ---[ end trace 0cc912d7bbc782ab ]--- [ 85.225652][ C1] RIP: 0010:fixup_bad_iret+0x24/0x170 [ 85.225663][ C1] 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 e0 83 45 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 4f 96 66 89 48 c1 eb 03 48 [ 85.225667][ C1] RSP: 0018:fffffe0000036fb8 EFLAGS: 00010086 [ 85.225674][ C1] RAX: 0000000000000000 RBX: fffffe0000036fb8 RCX: ffffffff88000e87 [ 85.225679][ C1] RDX: 0000000000000000 RSI: ffffffff880009a8 RDI: ffffffff884583e0 [ 85.225684][ C1] RBP: fffffe0000037120 R08: 0000000000000000 R09: 0000000000000000 [ 85.225689][ C1] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 85.225694][ C1] R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000000 [ 85.225699][ C1] FS: 0000000000e47880(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 85.225703][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 85.225708][ C1] CR2: fffffe0000036fa8 CR3: 000000009f9e1000 CR4: 00000000001406e0 [ 85.225712][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 85.225717][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 85.225722][ C1] Kernel panic - not syncing: Fatal exception in interrupt [ 85.241644][ C1] Kernel Offset: disabled