general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 0 PID: 11286 Comm: syz-executor.2 Not tainted 5.16.0-rc3-syzkaller #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014 RIP: 0010:__list_del_entry_valid+0x81/0xf0 lib/list_debug.c:51 Code: 0f 84 1f 16 31 05 48 b8 22 01 00 00 00 00 ad de 49 39 c4 0f 84 20 16 31 05 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 <80> 3c 02 00 75 51 49 8b 14 24 48 39 ea 0f 85 d7 15 31 05 49 8d 7d RSP: 0018:ffffc9000d93f318 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: 0000000000000001 RCX: ffffc900247a1000 RDX: 0000000000000000 RSI: ffffffff811d299b RDI: ffff888024cb35d8 RBP: ffff888024cb35d0 R08: 0000000000000001 R09: 0000000000000003 R10: fffff52001b27e59 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: ffff888024cb35d0 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff88802ca00000(0063) knlGS:00000000f4436b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 000000002be27000 CR3: 0000000077988000 CR4: 0000000000152ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __list_del_entry include/linux/list.h:134 [inline] list_del include/linux/list.h:148 [inline] tdp_mmu_unlink_page arch/x86/kvm/mmu/tdp_mmu.c:289 [inline] handle_removed_tdp_mmu_page arch/x86/kvm/mmu/tdp_mmu.c:324 [inline] __handle_changed_spte+0x8dc/0x13e0 arch/x86/kvm/mmu/tdp_mmu.c:475 tdp_mmu_set_spte_atomic arch/x86/kvm/mmu/tdp_mmu.c:522 [inline] tdp_mmu_set_spte_atomic arch/x86/kvm/mmu/tdp_mmu.c:501 [inline] tdp_mmu_zap_spte_atomic arch/x86/kvm/mmu/tdp_mmu.c:538 [inline] zap_gfn_range+0x5c8/0xee0 arch/x86/kvm/mmu/tdp_mmu.c:750 kvm_tdp_mmu_zap_invalidated_roots+0x110/0x410 arch/x86/kvm/mmu/tdp_mmu.c:841 kvm_mmu_zap_all_fast+0x5b8/0x760 arch/x86/kvm/mmu/mmu.c:5669 kvm_page_track_flush_slot+0xfb/0x1a0 arch/x86/kvm/mmu/page_track.c:299 kvm_set_memslot+0x665/0x1e50 arch/x86/kvm/../../../virt/kvm/kvm_main.c:1585 __kvm_set_memory_region+0xd1e/0x13a0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:1779 kvm_set_memory_region arch/x86/kvm/../../../virt/kvm/kvm_main.c:1800 [inline] kvm_vm_ioctl_set_memory_region arch/x86/kvm/../../../virt/kvm/kvm_main.c:1812 [inline] kvm_vm_ioctl+0x512/0x23d0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:4311 kvm_vm_compat_ioctl+0x288/0x350 arch/x86/kvm/../../../virt/kvm/kvm_main.c:4536 __do_compat_sys_ioctl+0x1c7/0x290 fs/ioctl.c:972 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] __do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:203 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c RIP: 0023:0xf6e7e549 Code: 03 74 c0 01 10 05 03 74 b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000f44365fc EFLAGS: 00000296 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 000000004020ae46 RDX: 0000000020000040 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: ---[ end trace 2b51c81de60d8d0f ]--- RIP: 0010:__list_del_entry_valid+0x81/0xf0 lib/list_debug.c:51 Code: 0f 84 1f 16 31 05 48 b8 22 01 00 00 00 00 ad de 49 39 c4 0f 84 20 16 31 05 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 <80> 3c 02 00 75 51 49 8b 14 24 48 39 ea 0f 85 d7 15 31 05 49 8d 7d RSP: 0018:ffffc9000d93f318 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: 0000000000000001 RCX: ffffc900247a1000 RDX: 0000000000000000 RSI: ffffffff811d299b RDI: ffff888024cb35d8 RBP: ffff888024cb35d0 R08: 0000000000000001 R09: 0000000000000003 R10: fffff52001b27e59 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: ffff888024cb35d0 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff88802ca00000(0063) knlGS:00000000f4436b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 000000002be27000 CR3: 0000000077988000 CR4: 0000000000152ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 0f 84 1f 16 31 05 je 0x5311625 6: 48 b8 22 01 00 00 00 movabs $0xdead000000000122,%rax d: 00 ad de 10: 49 39 c4 cmp %rax,%r12 13: 0f 84 20 16 31 05 je 0x5311639 19: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 20: fc ff df 23: 4c 89 e2 mov %r12,%rdx 26: 48 c1 ea 03 shr $0x3,%rdx * 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 2e: 75 51 jne 0x81 30: 49 8b 14 24 mov (%r12),%rdx 34: 48 39 ea cmp %rbp,%rdx 37: 0f 85 d7 15 31 05 jne 0x5311614 3d: 49 rex.WB 3e: 8d .byte 0x8d 3f: 7d .byte 0x7d