BUG: kernel NULL pointer dereference, address: 0000000000000007 #PF: supervisor write access in kernel mode #PF: error_code(0x0002) - not-present page PGD 0 P4D 0 Oops: 0002 [#1] PREEMPT SMP KASAN CPU: 1 PID: 3923 Comm: systemd-udevd Not tainted 5.9.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__seqcount_assert include/linux/seqlock.h:211 [inline] RIP: 0010:update_pvclock_gtod arch/x86/kvm/x86.c:1739 [inline] RIP: 0010:pvclock_gtod_notify+0x38/0x570 arch/x86/kvm/x86.c:7466 Code: 9b 59 8b 48 ba 00 00 00 00 00 fc ff df 48 89 c1 83 e0 07 48 c1 e9 03 83 c0 03 0f b6 14 11 38 d0 7c 08 84 d2 0f 85 63 04 00 00 <00> 00 00 00 4d 0a 31 ff 89 ee e8 59 08 6a 00 85 ed 74 23 e8 f0 0b RSP: 0018:ffffc90000da8bf0 EFLAGS: 00010046 RAX: 0000000000000007 RBX: ffffffff8d440980 RCX: 1ffffffff16b3377 RDX: 0000000000000000 RSI: ffffffff810c325a RDI: ffffffff89f02dc0 RBP: dffffc0000000000 R08: 0000000000000000 R09: ffffffff8d0c09e7 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: ffffffff89f02dc0 FS: 00007f0a3428c8c0(0000) GS:ffff8880ae500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000007 CR3: 000000009f1c6000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: notifier_call_chain+0xb5/0x200 kernel/notifier.c:83 update_pvclock_gtod kernel/time/timekeeping.c:581 [inline] timekeeping_update+0x28a/0x4a0 kernel/time/timekeeping.c:675 timekeeping_advance+0x6ad/0xa40 kernel/time/timekeeping.c:2122 tick_do_update_jiffies64.part.0+0x1ec/0x330 kernel/time/tick-sched.c:101 tick_do_update_jiffies64 kernel/time/tick-sched.c:64 [inline] tick_sched_do_timer kernel/time/tick-sched.c:147 [inline] tick_sched_timer+0x236/0x2a0 kernel/time/tick-sched.c:1321 __run_hrtimer kernel/time/hrtimer.c:1524 [inline] __hrtimer_run_queues+0x1d5/0xfc0 kernel/time/hrtimer.c:1588 hrtimer_interrupt+0x334/0x940 kernel/time/hrtimer.c:1650 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1080 [inline] __sysvec_apic_timer_interrupt+0x147/0x5f0 arch/x86/kernel/apic/apic.c:1097 asm_call_irq_on_stack+0xf/0x20 __run_sysvec_on_irqstack arch/x86/include/asm/irq_stack.h:37 [inline] run_sysvec_on_irqstack_cond arch/x86/include/asm/irq_stack.h:89 [inline] sysvec_apic_timer_interrupt+0xb2/0xf0 arch/x86/kernel/apic/apic.c:1091 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:581 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:770 [inline] RIP: 0010:lock_acquire+0x27b/0xaf0 kernel/locking/lockdep.c:5032 Code: ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 0f 85 1d 07 00 00 48 83 3d c8 60 a0 08 00 0f 84 73 05 00 00 4c 89 ff 57 9d <0f> 1f 44 00 00 48 b8 00 00 00 00 00 fc ff df 48 03 44 24 08 48 c7 RSP: 0018:ffffc90001647738 EFLAGS: 00000286 RAX: 1ffffffff13f8d7d RBX: ffff8880a7988540 RCX: 0000000000000001 RDX: dffffc0000000000 RSI: 232c3c61f8686819 RDI: 0000000000000286 RBP: ffffffff8a067f40 R08: 0000000000000000 R09: ffffffff8d0c09e7 R10: fffffbfff1a1813c R11: 0000000000000000 R12: 0000000000000002 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000286 rcu_lock_acquire include/linux/rcupdate.h:241 [inline] rcu_read_lock include/linux/rcupdate.h:634 [inline] avc_has_perm_noaudit+0xcb/0x390 security/selinux/avc.c:1143 selinux_inode_permission+0x3ff/0x670 security/selinux/hooks.c:3049 security_inode_permission+0x92/0xf0 security/security.c:1258 inode_permission.part.0+0x113/0x410 fs/namei.c:471 inode_permission fs/namei.c:444 [inline] may_lookup fs/namei.c:1569 [inline] link_path_walk.part.0+0x1f2/0xc20 fs/namei.c:2125 link_path_walk fs/namei.c:2111 [inline] path_lookupat+0xb7/0x830 fs/namei.c:2332 filename_lookup+0x19f/0x560 fs/namei.c:2366 user_path_at include/linux/namei.h:59 [inline] vfs_statx+0x14e/0x390 fs/stat.c:202 vfs_lstat include/linux/fs.h:3178 [inline] __do_sys_newlstat+0x91/0x110 fs/stat.c:374 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7f0a330ff335 Code: 69 db 2b 00 64 c7 00 16 00 00 00 b8 ff ff ff ff c3 0f 1f 40 00 83 ff 01 48 89 f0 77 30 48 89 c7 48 89 d6 b8 06 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 03 f3 c3 90 48 8b 15 31 db 2b 00 f7 d8 64 89 RSP: 002b:00007ffe1a9a3788 EFLAGS: 00000246 ORIG_RAX: 0000000000000006 RAX: ffffffffffffffda RBX: 0000557e57149e80 RCX: 00007f0a330ff335 RDX: 00007ffe1a9a37c0 RSI: 00007ffe1a9a37c0 RDI: 0000557e57148e80 RBP: 00007ffe1a9a3880 R08: 00007f0a333be1e8 R09: 0000000000001010 R10: 00007f0a333bdb58 R11: 0000000000000246 R12: 0000557e57148e80 R13: 0000557e57148ea0 R14: 0000557e57131ceb R15: 0000557e57131cf0 Modules linked in: CR2: 0000000000000007 ---[ end trace 696cc69759c49767 ]--- RIP: 0010:__seqcount_assert include/linux/seqlock.h:211 [inline] RIP: 0010:update_pvclock_gtod arch/x86/kvm/x86.c:1739 [inline] RIP: 0010:pvclock_gtod_notify+0x38/0x570 arch/x86/kvm/x86.c:7466 Code: 9b 59 8b 48 ba 00 00 00 00 00 fc ff df 48 89 c1 83 e0 07 48 c1 e9 03 83 c0 03 0f b6 14 11 38 d0 7c 08 84 d2 0f 85 63 04 00 00 <00> 00 00 00 4d 0a 31 ff 89 ee e8 59 08 6a 00 85 ed 74 23 e8 f0 0b RSP: 0018:ffffc90000da8bf0 EFLAGS: 00010046 RAX: 0000000000000007 RBX: ffffffff8d440980 RCX: 1ffffffff16b3377 RDX: 0000000000000000 RSI: ffffffff810c325a RDI: ffffffff89f02dc0 RBP: dffffc0000000000 R08: 0000000000000000 R09: ffffffff8d0c09e7 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: ffffffff89f02dc0 FS: 00007f0a3428c8c0(0000) GS:ffff8880ae500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000007 CR3: 000000009f1c6000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400