general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.8.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__switch_to_asm+0x0/0x40 arch/x86/entry/entry_64.S:228 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 RSP: 0018:ffffc90000d3fcf8 EFLAGS: 00010046 RAX: dffffc0000000000 RBX: ffff8880ae735e18 RCX: 0000000000000000 RDX: 1ffff11015ce6bc2 RSI: ffff8880901a0380 RDI: ffff8880a9636340 RBP: ffffc90000d3fdd0 R08: 0000000000000001 R09: ffff8880a9636c08 R10: fffffbfff155da49 R11: 0000000000000000 R12: ffff8880a9636340 R13: ffff8880ae735e00 R14: ffff8880901a0380 R15: ffff8880a9636770 FS: 0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffdc8509824 CR3: 00000000932de000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: context_switch kernel/sched/core.c:3458 [inline] __schedule+0x91f/0x2250 kernel/sched/core.c:4215 schedule_idle+0x53/0x90 kernel/sched/core.c:4318 do_idle+0x323/0x6d0 kernel/sched/idle.c:304 cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:372 start_secondary+0x2b3/0x370 arch/x86/kernel/smpboot.c:268 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:243 Modules linked in: ---[ end trace 7a34eebe4ac3fb0b ]--- RIP: 0010:__switch_to_asm+0x0/0x40 arch/x86/entry/entry_64.S:228 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 RSP: 0018:ffffc90000d3fcf8 EFLAGS: 00010046 RAX: dffffc0000000000 RBX: ffff8880ae735e18 RCX: 0000000000000000 RDX: 1ffff11015ce6bc2 RSI: ffff8880901a0380 RDI: ffff8880a9636340 RBP: ffffc90000d3fdd0 R08: 0000000000000001 R09: ffff8880a9636c08 R10: fffffbfff155da49 R11: 0000000000000000 R12: ffff8880a9636340 R13: ffff8880ae735e00 R14: ffff8880901a0380 R15: ffff8880a9636770 FS: 0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffdc8509824 CR3: 00000000932de000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400