BUG: kernel NULL pointer dereference, address: 0000000000000001 #PF: supervisor write access in kernel mode #PF: error_code(0x0002) - not-present page PGD 93665067 P4D 93665067 PUD 9685b067 PMD 0 Oops: 0002 [#1] PREEMPT SMP KASAN CPU: 0 PID: 32555 Comm: syz-executor.2 Not tainted 5.6.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:update_pvclock_gtod arch/x86/kvm/x86.c:1643 [inline] RIP: 0010:pvclock_gtod_notify+0x1e7/0x4d0 arch/x86/kvm/x86.c:7282 Code: 8b 6b 38 48 8d 7d 24 48 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 39 02 00 00 8b 45 24 <48> 00 00 00 00 89 fa 48 c1 ea 03 89 05 50 3a 88 0a 48 b8 00 00 00 RSP: 0018:ffffc90000007c18 EFLAGS: 00010046 RAX: 0000000000000001 RBX: ffffffff8c3e25a0 RCX: 00000000000076c2 RDX: 0000000000000000 RSI: 1ffff92000000f61 RDI: ffffffff8970e884 RBP: ffffffff8970e860 R08: ffffffff8c062110 R09: fffffbfff180e57c R10: fffffbfff180e57b R11: ffffffff8c072bdf R12: 0000000000000000 R13: dffffc0000000000 R14: 0000000000000000 R15: ffffffff896c4260 FS: 00007f8e5ee06700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000001 CR3: 000000008ddf6000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: notifier_call_chain+0xc0/0x230 kernel/notifier.c:83 update_pvclock_gtod kernel/time/timekeeping.c:578 [inline] timekeeping_update+0x28a/0x4a0 kernel/time/timekeeping.c:672 timekeeping_advance+0x647/0x980 kernel/time/timekeeping.c:2120 tick_do_update_jiffies64.part.0+0x182/0x290 kernel/time/tick-sched.c:98 tick_do_update_jiffies64 kernel/time/tick-sched.c:64 [inline] tick_sched_do_timer+0x15c/0x1a0 kernel/time/tick-sched.c:142 tick_sched_timer+0x35/0x140 kernel/time/tick-sched.c:1307 __run_hrtimer kernel/time/hrtimer.c:1517 [inline] __hrtimer_run_queues+0x32c/0xdd0 kernel/time/hrtimer.c:1579 hrtimer_interrupt+0x312/0x770 kernel/time/hrtimer.c:1641 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1119 [inline] smp_apic_timer_interrupt+0x15b/0x600 arch/x86/kernel/apic/apic.c:1144 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829 RIP: 0010:__write_once_size include/linux/compiler.h:226 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x44/0x50 kernel/kcov.c:195 Code: 75 2b 8b 90 80 13 00 00 83 fa 02 75 20 48 8b 88 88 13 00 00 8b 80 84 13 00 00 48 8b 11 48 83 c2 01 48 39 d0 76 07 48 89 34 d1 <48> 89 11 c3 0f 1f 84 00 00 00 00 00 65 4c 8b 04 25 c0 1e 02 00 65 RSP: 0018:ffffc9000503fa08 EFLAGS: 00000216 ORIG_RAX: ffffffffffffff13 RAX: 0000000000040000 RBX: 0000000000000002 RCX: ffffc9000e0ab000 RDX: 000000000000744c RSI: ffffffff835845b4 RDI: 0000000000000001 RBP: ffff888090b52c00 R08: ffff88808c8ce440 R09: fffffbfff18af911 R10: fffffbfff18af910 R11: ffffffff8c57c887 R12: 0000000000000030 R13: 0000000000000194 R14: dffffc0000000000 R15: 0000000000000000 tomoyo_domain_quota_is_ok+0x2f4/0x500 security/tomoyo/util.c:1071 tomoyo_supervisor+0x2d5/0xee0 security/tomoyo/common.c:2089 tomoyo_audit_path_number_log security/tomoyo/file.c:235 [inline] tomoyo_path_number_perm+0x3e9/0x4d0 security/tomoyo/file.c:734 security_file_ioctl+0x6c/0xb0 security/security.c:1441 ksys_ioctl+0x50/0x180 fs/ioctl.c:757 __do_sys_ioctl fs/ioctl.c:772 [inline] __se_sys_ioctl fs/ioctl.c:770 [inline] __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:770 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45c4a9 Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f8e5ee05c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f8e5ee066d4 RCX: 000000000045c4a9 RDX: 0000000000000000 RSI: 0000000000005501 RDI: 000000000000000e RBP: 000000000076bfc0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000000005bd R14: 00000000004c8235 R15: 000000000076bfcc Modules linked in: CR2: 0000000000000001 ---[ end trace d75ade031b263e48 ]--- RIP: 0010:update_pvclock_gtod arch/x86/kvm/x86.c:1643 [inline] RIP: 0010:pvclock_gtod_notify+0x1e7/0x4d0 arch/x86/kvm/x86.c:7282 Code: 8b 6b 38 48 8d 7d 24 48 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 39 02 00 00 8b 45 24 <48> 00 00 00 00 89 fa 48 c1 ea 03 89 05 50 3a 88 0a 48 b8 00 00 00 RSP: 0018:ffffc90000007c18 EFLAGS: 00010046 RAX: 0000000000000001 RBX: ffffffff8c3e25a0 RCX: 00000000000076c2 RDX: 0000000000000000 RSI: 1ffff92000000f61 RDI: ffffffff8970e884 RBP: ffffffff8970e860 R08: ffffffff8c062110 R09: fffffbfff180e57c R10: fffffbfff180e57b R11: ffffffff8c072bdf R12: 0000000000000000 R13: dffffc0000000000 R14: 0000000000000000 R15: ffffffff896c4260 FS: 00007f8e5ee06700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000001 CR3: 000000008ddf6000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400