[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.10.30' (ECDSA) to the list of known hosts. executing program executing program syzkaller login: [ 78.172891][ T0] general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN [ 78.172903][ T0] KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] [ 78.172918][ T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.8.0-rc4-next-20200710-syzkaller #0 [ 78.172926][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 78.172950][ T0] RIP: 0010:__switch_to_asm+0x0/0x40 [ 78.172964][ 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 [ 78.172972][ T0] RSP: 0018:ffffc90000d3fd90 EFLAGS: 00010046 [ 78.172983][ T0] RAX: dffffc0000000000 RBX: ffff8880ae735e18 RCX: 0000000000000000 [ 78.172992][ T0] RDX: 1ffff11015ce6bc2 RSI: ffff8880a8818040 RDI: ffff8880a95f6340 [ 78.173000][ T0] RBP: ffffc90000d3fe60 R08: 0000000000000001 R09: ffff8880a95f6c10 [ 78.173008][ T0] R10: fffffbfff155eb51 R11: 0000000000000000 R12: ffff8880ae735e00 [ 78.173017][ T0] R13: ffff8880a95f6340 R14: ffff8880a8818040 R15: ffff8880a95f6770 [ 78.173028][ T0] FS: 0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 78.173037][ T0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 78.173045][ T0] CR2: 00007ffead1ffd54 CR3: 0000000094acf000 CR4: 00000000001506e0 [ 78.173057][ T0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 78.173065][ T0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 78.173069][ T0] Call Trace: [ 78.173087][ T0] __schedule+0x8b4/0x1e80 [ 78.173106][ T0] ? io_schedule_timeout+0x140/0x140 [ 78.173123][ T0] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 78.173137][ T0] ? trace_hardirqs_on+0x5f/0x220 [ 78.173151][ T0] ? lockdep_hardirqs_on+0x6a/0xe0 [ 78.173166][ T0] schedule_idle+0x53/0x90 [ 78.173180][ T0] do_idle+0x323/0x6d0 [ 78.173197][ T0] ? arch_cpu_idle_exit+0x70/0x70 [ 78.173210][ T0] ? trace_hardirqs_on+0x5f/0x220 [ 78.173224][ T0] ? lockdep_hardirqs_on+0x6a/0xe0 [ 78.173241][ T0] cpu_startup_entry+0x14/0x20 [ 78.173255][ T0] secondary_startup_64+0xa4/0xb0 [ 78.173264][ T0] Modules linked in: [ 78.173281][ T0] ---[ end trace 6586fa33080ff08a ]--- [ 78.173297][ T0] RIP: 0010:__switch_to_asm+0x0/0x40 [ 78.173310][ 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 [ 78.173318][ T0] RSP: 0018:ffffc90000d3fd90 EFLAGS: 00010046 [ 78.173328][ T0] RAX: dffffc0000000000 RBX: ffff8880ae735e18 RCX: 0000000000000000 [ 78.173336][ T0] RDX: 1ffff11015ce6bc2 RSI: ffff8880a8818040 RDI: ffff8880a95f6340 [ 78.173345][ T0] RBP: ffffc90000d3fe60 R08: 0000000000000001 R09: ffff8880a95f6c10 [ 78.173353][ T0] R10: fffffbfff155eb51 R11: 0000000000000000 R12: ffff8880ae735e00 [ 78.173361][ T0] R13: ffff8880a95f6340 R14: ffff8880a8818040 R15: ffff8880a95f6770 [ 78.173372][ T0] FS: 0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 78.173380][ T0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 78.173388][ T0] CR2: 00007ffead1ffd54 CR3: 0000000094acf000 CR4: 00000000001506e0 [ 78.173396][ T0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 78.173404][ T0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 78.173410][ T0] Kernel panic - not syncing: Fatal exception [ 78.174563][ T0] Kernel Offset: disabled [ 78.515560][ T0] Rebooting in 86400 seconds..