BUG: unable to handle page fault for address: ffffffff81007042 #PF: supervisor write access in kernel mode #PF: error_code(0x0003) - permissions violation PGD 5e11067 P4D 5e11067 PUD 5e12063 PMD 10001e1 Oops: 0003 [#1] PREEMPT SMP KASAN CPU: 1 PID: 74 Comm: kworker/1:1 Not tainted 5.4.274-syzkaller-00016-gdd432c37afcd #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 Workqueue: rcu_gp process_srcu RIP: 0010:__hlist_del include/linux/list.h:791 [inline] RIP: 0010:detach_timer kernel/time/timer.c:824 [inline] RIP: 0010:expire_timers kernel/time/timer.c:1482 [inline] RIP: 0010:__run_timers+0x7be/0xbe0 kernel/time/timer.c:1817 Code: 74 2e e8 e5 68 0f 00 49 83 c5 08 4c 89 e8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 80 3c 08 00 74 08 4c 89 ef e8 32 4e 3f 00 <4d> 89 65 00 eb 05 e8 b7 68 0f 00 49 bd 00 00 00 00 00 fc ff df 42 RSP: 0018:ffff8881f6f09d60 EFLAGS: 00010046 RAX: 1ffffffff0200e08 RBX: 1ffff1103d9f9e39 RCX: dffffc0000000000 RDX: 0000000000000102 RSI: 0000000000000004 RDI: ffff8881f6f09ce0 RBP: ffff8881f6f09ec8 R08: dffffc0000000000 R09: 0000000000000003 R10: ffffffffffffffff R11: dffffc0000000001 R12: ffff8881f6f09e28 R13: ffffffff81007042 R14: 1ffff1103d9f9e38 R15: ffff8881ecfcf1c8 FS: 0000000000000000(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffff81007042 CR3: 00000001d5fcc000 CR4: 00000000003406a0 DR0: 0000000020000240 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff1 DR7: 0000000000000600 Call Trace: run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1830 __do_softirq+0x23b/0x6b7 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x195/0x1c0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:538 [inline] smp_apic_timer_interrupt+0x11a/0x460 arch/x86/kernel/apic/apic.c:1149 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:834 RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:26 [inline] RIP: 0010:preempt_latency_start kernel/sched/core.c:3993 [inline] RIP: 0010:preempt_count_add+0x72/0x180 kernel/sched/core.c:4019 Code: c1 e8 03 42 0f b6 04 38 84 c0 0f 85 d9 00 00 00 83 3d a1 b7 a4 05 00 75 11 65 8b 05 64 ab bd 7e 0f b6 c0 3d f5 00 00 00 73 59 <65> 8b 05 53 ab bd 7e 25 ff ff ff 7f 39 d8 75 43 4c 8b 74 24 18 4c RSP: 0018:ffff8881f3bffbc8 EFLAGS: 00000297 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000001 RBX: 0000000000000001 RCX: ffffffff86e99903 RDX: 0000000000000017 RSI: 0000000000000001 RDI: 0000000000000001 RBP: 000000000000076c R08: ffffffff82316c81 R09: ffffed103e77ff81 R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000093 R13: 1ffffffff0c96da9 R14: 0000000000002afa R15: dffffc0000000000 delay_tsc+0x62/0xd0 arch/x86/lib/delay.c:68 try_check_zero+0x2f2/0x360 kernel/rcu/srcutree.c:708 srcu_advance_state kernel/rcu/srcutree.c:1146 [inline] process_srcu+0x1ab/0xc40 kernel/rcu/srcutree.c:1241 process_one_work+0x765/0xd20 kernel/workqueue.c:2290 worker_thread+0xaef/0x1470 kernel/workqueue.c:2436 kthread+0x2da/0x360 kernel/kthread.c:288 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:354 Modules linked in: CR2: ffffffff81007042 ---[ end trace 566814a00310587f ]--- RIP: 0010:__hlist_del include/linux/list.h:791 [inline] RIP: 0010:detach_timer kernel/time/timer.c:824 [inline] RIP: 0010:expire_timers kernel/time/timer.c:1482 [inline] RIP: 0010:__run_timers+0x7be/0xbe0 kernel/time/timer.c:1817 Code: 74 2e e8 e5 68 0f 00 49 83 c5 08 4c 89 e8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 80 3c 08 00 74 08 4c 89 ef e8 32 4e 3f 00 <4d> 89 65 00 eb 05 e8 b7 68 0f 00 49 bd 00 00 00 00 00 fc ff df 42 RSP: 0018:ffff8881f6f09d60 EFLAGS: 00010046 RAX: 1ffffffff0200e08 RBX: 1ffff1103d9f9e39 RCX: dffffc0000000000 RDX: 0000000000000102 RSI: 0000000000000004 RDI: ffff8881f6f09ce0 RBP: ffff8881f6f09ec8 R08: dffffc0000000000 R09: 0000000000000003 R10: ffffffffffffffff R11: dffffc0000000001 R12: ffff8881f6f09e28 R13: ffffffff81007042 R14: 1ffff1103d9f9e38 R15: ffff8881ecfcf1c8 FS: 0000000000000000(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffff81007042 CR3: 00000001d5fcc000 CR4: 00000000003406a0 DR0: 0000000020000240 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff1 DR7: 0000000000000600 ---------------- Code disassembly (best guess): 0: 74 2e je 0x30 2: e8 e5 68 0f 00 call 0xf68ec 7: 49 83 c5 08 add $0x8,%r13 b: 4c 89 e8 mov %r13,%rax e: 48 c1 e8 03 shr $0x3,%rax 12: 48 b9 00 00 00 00 00 movabs $0xdffffc0000000000,%rcx 19: fc ff df 1c: 80 3c 08 00 cmpb $0x0,(%rax,%rcx,1) 20: 74 08 je 0x2a 22: 4c 89 ef mov %r13,%rdi 25: e8 32 4e 3f 00 call 0x3f4e5c * 2a: 4d 89 65 00 mov %r12,0x0(%r13) <-- trapping instruction 2e: eb 05 jmp 0x35 30: e8 b7 68 0f 00 call 0xf68ec 35: 49 bd 00 00 00 00 00 movabs $0xdffffc0000000000,%r13 3c: fc ff df 3f: 42 rex.X