BUG: unable to handle page fault for address: ffffffff81937395 #PF: supervisor write access in kernel mode #PF: error_code(0x0003) - permissions violation PGD 5e11067 P4D 5e11067 PUD 5e12063 PMD 18001e1 Oops: 0003 [#1] PREEMPT SMP KASAN CPU: 1 PID: 372 Comm: syz-executor.1 Not tainted 5.4.274-syzkaller-00016-gdd432c37afcd #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 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: 1ffffffff0326e72 RBX: 1ffff1103c2c3e39 RCX: dffffc0000000000 RDX: 0000000080000102 RSI: 0000000000000004 RDI: ffff8881f6f09ce0 RBP: ffff8881f6f09ec8 R08: dffffc0000000000 R09: 0000000000000003 R10: ffffffffffffffff R11: dffffc0000000001 R12: ffff8881f6f09e28 R13: ffffffff81937395 R14: 1ffff1103c2c3e38 R15: ffff8881e161f1c8 FS: 0000555555c3d480(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffff81937395 CR3: 00000001d8de8000 CR4: 00000000003406a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 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:next_thread include/linux/sched/signal.h:687 [inline] RIP: 0010:do_wait+0x3c9/0x7f0 kernel/exit.c:1538 Code: 85 17 01 00 00 49 81 c6 00 06 00 00 4c 89 f0 48 c1 e8 03 42 80 3c 28 00 48 8b 5c 24 38 74 08 4c 89 f7 e8 0a 2d 58 00 4d 8b 36 <48> c7 c0 00 fa ff ff 49 01 c6 49 39 de 0f 84 e6 00 00 00 e8 ff 47 RSP: 0018:ffff8881d8e37b60 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 1ffff1103c206a98 RBX: ffff8881e1034ec0 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffff8881d8e37c70 R08: ffffffff813bf3d7 R09: ffffffff813c123a R10: ffff8881e1034ec0 R11: 0000000000000002 R12: ffff8881d8e37cc0 R13: dffffc0000000000 R14: ffff8881e10354c0 R15: dffffc0000000000 kernel_wait4+0x29b/0x3c0 kernel/exit.c:1684 __do_sys_wait4 kernel/exit.c:1696 [inline] __se_sys_wait4 kernel/exit.c:1692 [inline] __x64_sys_wait4+0x130/0x1e0 kernel/exit.c:1692 do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x5c/0xc1 RIP: 0033:0x7fddf9eba953 Code: 00 00 0f 1f 44 00 00 31 c9 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 80 3d b1 e5 10 00 00 49 89 ca 74 14 b8 3d 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 5d c3 0f 1f 40 00 48 83 ec 28 89 54 24 14 48 RSP: 002b:00007fffa4795098 EFLAGS: 00000202 ORIG_RAX: 000000000000003d RAX: ffffffffffffffda RBX: 0000000000000086 RCX: 00007fddf9eba953 RDX: 0000000040000001 RSI: 00007fffa47950ec RDI: 00000000ffffffff RBP: 00007fffa47950ec R08: 00007fffa47a9080 R09: 00007fffa47a90b0 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000032 R13: 000000000000a2f6 R14: 000000000000a2ed R15: 000000000000001e Modules linked in: CR2: ffffffff81937395 ---[ end trace e2f1a6ac7e02ca4d ]--- 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: 1ffffffff0326e72 RBX: 1ffff1103c2c3e39 RCX: dffffc0000000000 RDX: 0000000080000102 RSI: 0000000000000004 RDI: ffff8881f6f09ce0 RBP: ffff8881f6f09ec8 R08: dffffc0000000000 R09: 0000000000000003 R10: ffffffffffffffff R11: dffffc0000000001 R12: ffff8881f6f09e28 R13: ffffffff81937395 R14: 1ffff1103c2c3e38 R15: ffff8881e161f1c8 FS: 0000555555c3d480(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffff81937395 CR3: 00000001d8de8000 CR4: 00000000003406a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- 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