[ 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 '10.128.0.251' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 75.886806][ T29] audit: type=1400 audit(1594445333.143:8): avc: denied { execmem } for pid=6818 comm="syz-executor035" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 executing program [ 76.199883][ T0] general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN [ 76.199893][ T0] KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] [ 76.199907][ T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.8.0-rc4-syzkaller #0 [ 76.199914][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 76.199935][ T0] RIP: 0010:__switch_to_asm+0x0/0x40 [ 76.199948][ T0] Code: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 <00> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 76.199956][ T0] RSP: 0018:ffffffff89a07ce8 EFLAGS: 00010046 [ 76.199966][ T0] RAX: dffffc0000000000 RBX: ffff8880ae635e18 RCX: 0000000000000000 [ 76.199974][ T0] RDX: 1ffff11015cc6bc2 RSI: ffff8880a4e74080 RDI: ffffffff89a86580 [ 76.199982][ T0] RBP: ffffffff89a07db8 R08: 0000000000000001 R09: ffffffff89a86e48 [ 76.199990][ T0] R10: fffffbfff155cb69 R11: 0000000000000000 R12: ffff8880ae635e00 [ 76.199999][ T0] R13: ffffffff89a86580 R14: ffff8880a4e74080 R15: ffffffff89a869b0 [ 76.200010][ T0] FS: 0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 76.200019][ T0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 76.200027][ T0] CR2: 00007ffd1e3c4054 CR3: 000000009937b000 CR4: 00000000001406f0 [ 76.200038][ T0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 76.200046][ T0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 76.200049][ T0] Call Trace: [ 76.200068][ T0] __schedule+0x8e1/0x1eb0 [ 76.200086][ T0] ? io_schedule_timeout+0x140/0x140 [ 76.200101][ T0] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 76.200114][ T0] ? trace_hardirqs_on+0x5f/0x220 [ 76.200128][ T0] ? lockdep_hardirqs_on+0x6a/0xe0 [ 76.200143][ T0] schedule_idle+0x53/0x90 [ 76.200157][ T0] do_idle+0x323/0x6d0 [ 76.200172][ T0] ? arch_cpu_idle_exit+0x70/0x70 [ 76.200190][ T0] ? trace_init_perf_perm_irq_work_exit+0xe/0xe [ 76.200204][ T0] cpu_startup_entry+0x14/0x20 [ 76.200220][ T0] start_kernel+0x9cb/0xa06 [ 76.200236][ T0] ? mem_encrypt_init+0x5/0x5 [ 76.200251][ T0] ? x86_cpuid_vendor+0x84/0x90 [ 76.200267][ T0] ? __sanitizer_cov_trace_switch+0x45/0x70 [ 76.200281][ T0] ? load_ucode_bsp+0x1b7/0x1f7 [ 76.200297][ T0] secondary_startup_64+0xa4/0xb0 [ 76.200306][ T0] Modules linked in: [ 76.200322][ T0] ---[ end trace 1009bea0fbfe5478 ]--- [ 76.200337][ T0] RIP: 0010:__switch_to_asm+0x0/0x40 [ 76.200349][ T0] Code: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 <00> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 76.200356][ T0] RSP: 0018:ffffffff89a07ce8 EFLAGS: 00010046 [ 76.200365][ T0] RAX: dffffc0000000000 RBX: ffff8880ae635e18 RCX: 0000000000000000 [ 76.200374][ T0] RDX: 1ffff11015cc6bc2 RSI: ffff8880a4e74080 RDI: ffffffff89a86580 [ 76.200382][ T0] RBP: ffffffff89a07db8 R08: 0000000000000001 R09: ffffffff89a86e48 [ 76.200390][ T0] R10: fffffbfff155cb69 R11: 0000000000000000 R12: ffff8880ae635e00 [ 76.200398][ T0] R13: ffffffff89a86580 R14: ffff8880a4e74080 R15: ffffffff89a869b0 [ 76.200409][ T0] FS: 0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 76.200417][ T0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 76.200425][ T0] CR2: 00007ffd1e3c4054 CR3: 000000009937b000 CR4: 00000000001406f0 [ 76.200432][ T0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 76.200439][ T0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 76.200445][ T0] Kernel panic - not syncing: Fatal exception [ 76.201928][ T0] Kernel Offset: disabled [ 76.566764][ T0] Rebooting in 86400 seconds..