Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.2' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 57.312495][ T0] general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN [ 57.312505][ T0] KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] [ 57.312517][ T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.8.0-rc3-syzkaller #0 [ 57.312524][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 57.312544][ T0] RIP: 0010:__switch_to_asm+0x0/0x40 [ 57.312556][ T0] Code: 00 00 00 00 00 00 00 00 00 00 48 c7 84 c4 48 01 00 00 00 00 00 00 8b 44 24 3c 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 [ 57.312563][ T0] RSP: 0018:ffffc90000d3fd00 EFLAGS: 00010046 [ 57.312587][ T0] RAX: dffffc0000000000 RBX: ffff8880ae735e18 RCX: 0000000000000000 [ 57.312595][ T0] RDX: 1ffff11015ce6bc2 RSI: ffff88809fa58040 RDI: ffff8880a9632340 [ 57.312602][ T0] RBP: ffffc90000d3fdd0 R08: 0000000000000001 R09: ffff8880a9632c08 [ 57.312610][ T0] R10: fffffbfff155cb29 R11: 0000000000000000 R12: ffff8880ae735e00 [ 57.312618][ T0] R13: ffff8880a9632340 R14: ffff88809fa58040 R15: ffff8880a9632770 [ 57.312628][ T0] FS: 0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 57.312636][ T0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 57.312644][ T0] CR2: 0000559d544ec248 CR3: 000000009fd3c000 CR4: 00000000001406e0 [ 57.312654][ T0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 57.312661][ T0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 57.312665][ T0] Call Trace: [ 57.312680][ T0] __schedule+0x8e1/0x1eb0 [ 57.312697][ T0] ? io_schedule_timeout+0x140/0x140 [ 57.312711][ T0] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 57.312723][ T0] ? trace_hardirqs_on+0x5f/0x220 [ 57.312737][ T0] ? lockdep_hardirqs_on+0x6a/0xe0 [ 57.312750][ T0] schedule_idle+0x53/0x90 [ 57.312763][ T0] do_idle+0x323/0x6d0 [ 57.312777][ T0] ? arch_cpu_idle_exit+0x70/0x70 [ 57.312788][ T0] ? trace_hardirqs_on+0x5f/0x220 [ 57.312801][ T0] ? lockdep_hardirqs_on+0x6a/0xe0 [ 57.312815][ T0] cpu_startup_entry+0x14/0x20 [ 57.312829][ T0] start_secondary+0x2b3/0x370 [ 57.312842][ T0] ? set_cpu_sibling_map+0x1e80/0x1e80 [ 57.312858][ T0] secondary_startup_64+0xa4/0xb0 [ 57.312867][ T0] Modules linked in: [ 57.312882][ T0] ---[ end trace 3aafbb8dab14d910 ]--- [ 57.312896][ T0] RIP: 0010:__switch_to_asm+0x0/0x40 [ 57.312907][ T0] Code: 00 00 00 00 00 00 00 00 00 00 48 c7 84 c4 48 01 00 00 00 00 00 00 8b 44 24 3c 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 [ 57.312914][ T0] RSP: 0018:ffffc90000d3fd00 EFLAGS: 00010046 [ 57.312923][ T0] RAX: dffffc0000000000 RBX: ffff8880ae735e18 RCX: 0000000000000000 [ 57.312931][ T0] RDX: 1ffff11015ce6bc2 RSI: ffff88809fa58040 RDI: ffff8880a9632340 [ 57.312939][ T0] RBP: ffffc90000d3fdd0 R08: 0000000000000001 R09: ffff8880a9632c08 [ 57.312946][ T0] R10: fffffbfff155cb29 R11: 0000000000000000 R12: ffff8880ae735e00 [ 57.312954][ T0] R13: ffff8880a9632340 R14: ffff88809fa58040 R15: ffff8880a9632770 [ 57.312964][ T0] FS: 0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 57.312972][ T0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 57.312979][ T0] CR2: 0000559d544ec248 CR3: 000000009fd3c000 CR4: 00000000001406e0 [ 57.312986][ T0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 57.312994][ T0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 57.312999][ T0] Kernel panic - not syncing: Fatal exception [ 57.313970][ T0] Kernel Offset: disabled [ 57.664776][ T0] Rebooting in 86400 seconds..