BUG: kernel NULL pointer dereference, address: 000000000000007e #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 21b36067 P4D 21b36067 PUD 210a9067 PMD 0 Oops: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 1993 Comm: syz-executor.0 Not tainted 5.9.0-rc1-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:1749 [inline] RIP: 0010:pvclock_gtod_notify+0x193/0x570 arch/x86/kvm/x86.c:7452 Code: 43 18 48 8d 7b 1c 48 89 fa 48 c1 ea 03 89 05 6c ea de 0a 48 b8 00 00 00 00 00 fc ff df 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 <38> 70 77 77 07 d2 0f 85 2b 03 00 00 8b 43 1c 48 8d 7b 20 48 89 fa RSP: 0018:ffffc90000007be8 EFLAGS: 00010002 RAX: 0000000000000007 RBX: ffffffff8c970980 RCX: ffffffff815a14fb RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffffffff8c97099c RBP: ffffffff89b35260 R08: 0000000000000000 R09: ffffffff8c5f0a1f R10: fffffbfff18be143 R11: 0000000000000001 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: ffffffff89ae9320 FS: 00007f23e0d95700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000000007e CR3: 0000000022770000 CR4: 00000000001526f0 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+0x32a/0x930 kernel/time/hrtimer.c:1650 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1080 [inline] __sysvec_apic_timer_interrupt+0x142/0x5e0 arch/x86/kernel/apic/apic.c:1097 asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:706 __run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [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:qlink_free mm/kasan/quarantine.c:152 [inline] RIP: 0010:qlist_free_all+0x11f/0x160 mm/kasan/quarantine.c:168 Code: 50 08 48 8d 4a ff 83 e2 01 48 0f 45 c1 4c 8b 78 18 e9 2b ff ff ff e8 40 ae c5 ff 48 83 3d 20 dc 01 08 00 74 3a 48 89 df 57 9d <0f> 1f 44 00 00 4d 85 e4 75 96 49 c7 45 08 00 00 00 00 49 c7 45 00 RSP: 0018:ffffc90008ade998 EFLAGS: 00000282 RAX: 00000000000068cd RBX: 0000000000000282 RCX: 0000000000000006 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000282 RBP: 0000000000000000 R08: 0000000000000001 R09: ffffffff8c5f09ff R10: fffffbfff18be13f R11: 0000000000000001 R12: ffff88801c5ea2f8 R13: ffffc90008ade9d8 R14: dffffc0000000000 R15: ffff88821bc47d00 quarantine_reduce+0x17e/0x200 mm/kasan/quarantine.c:261 __kasan_kmalloc.constprop.0+0x9e/0xd0 mm/kasan/common.c:442 slab_post_alloc_hook mm/slab.h:518 [inline] slab_alloc mm/slab.c:3312 [inline] kmem_cache_alloc_trace+0x137/0x2c0 mm/slab.c:3548 kmalloc include/linux/slab.h:554 [inline] kzalloc include/linux/slab.h:666 [inline] fib6_info_alloc+0xa7/0x190 net/ipv6/ip6_fib.c:154 ip6_route_info_create+0x350/0x19d0 net/ipv6/route.c:3650 addrconf_f6i_alloc+0x2ff/0x4b0 net/ipv6/route.c:4463 ipv6_add_addr+0x39d/0x1ec0 net/ipv6/addrconf.c:1087 add_addr+0xcf/0x2b0 net/ipv6/addrconf.c:3087 sit_add_v4_addrs net/ipv6/addrconf.c:3146 [inline] addrconf_sit_config net/ipv6/addrconf.c:3397 [inline] addrconf_notify+0x1a75/0x2310 net/ipv6/addrconf.c:3590 notifier_call_chain+0xb5/0x200 kernel/notifier.c:83 call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:2033 call_netdevice_notifiers_extack net/core/dev.c:2045 [inline] call_netdevice_notifiers net/core/dev.c:2059 [inline] __dev_notify_flags+0x110/0x2b0 net/core/dev.c:8322 rtnl_configure_link+0x16b/0x230 net/core/rtnetlink.c:3133 __rtnl_newlink+0x10b6/0x1740 net/core/rtnetlink.c:3460 rtnl_newlink+0x64/0xa0 net/core/rtnetlink.c:3500 rtnetlink_rcv_msg+0x44e/0xad0 net/core/rtnetlink.c:5563 netlink_rcv_skb+0x15a/0x430 net/netlink/af_netlink.c:2470 netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline] netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1330 netlink_sendmsg+0x856/0xd90 net/netlink/af_netlink.c:1919 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:671 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2353 ___sys_sendmsg+0xf3/0x170 net/socket.c:2407 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2440 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45d239 Code: 5d b4 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 2b b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f23e0d94c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 000000000002c0c0 RCX: 000000000045d239 RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000008 RBP: 000000000118cf80 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118cf4c R13: 000000000169fb6f R14: 00007f23e0d959c0 R15: 000000000118cf4c Modules linked in: CR2: 000000000000007e ---[ end trace 2fd43d320d412f51 ]--- RIP: 0010:update_pvclock_gtod arch/x86/kvm/x86.c:1749 [inline] RIP: 0010:pvclock_gtod_notify+0x193/0x570 arch/x86/kvm/x86.c:7452 Code: 43 18 48 8d 7b 1c 48 89 fa 48 c1 ea 03 89 05 6c ea de 0a 48 b8 00 00 00 00 00 fc ff df 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 <38> 70 77 77 07 d2 0f 85 2b 03 00 00 8b 43 1c 48 8d 7b 20 48 89 fa RSP: 0018:ffffc90000007be8 EFLAGS: 00010002 RAX: 0000000000000007 RBX: ffffffff8c970980 RCX: ffffffff815a14fb RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffffffff8c97099c RBP: ffffffff89b35260 R08: 0000000000000000 R09: ffffffff8c5f0a1f R10: fffffbfff18be143 R11: 0000000000000001 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: ffffffff89ae9320 FS: 00007f23e0d95700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000000007e CR3: 0000000022770000 CR4: 00000000001526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400