BUG: unable to handle page fault for address: ffffffff81b99493
#PF: supervisor write access in kernel mode
#PF: error_code(0x0003) - permissions violation
PGD 5c0f067 P4D 5c0f067 PUD 5c10063 PMD 1a001e1
Oops: 0003 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 3266 Comm: syz-executor.0 Not tainted 5.4.219-syzkaller-00002-ga0eae55f26a0 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023
RIP: 0010:__hlist_del include/linux/list.h:773 [inline]
RIP: 0010:detach_timer kernel/time/timer.c:824 [inline]
RIP: 0010:expire_timers+0x155/0x400 kernel/time/timer.c:1452
Code: 08 3e 00 4d 89 3e 4d 85 ff 74 2a e8 55 97 0f 00 49 83 c7 08 4c 89 f8 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 ff e8 fb 07 3e 00 <4d> 89 37 eb 0b 66 0f 1f 44 00 00 e8 2b 97 0f 00 4d 89 ef 42 80 7c
RSP: 0018:ffff8881f6f09d08 EFLAGS: 00010046
RAX: 1ffffffff0373292 RBX: ffff8881e29f31c0 RCX: ffff8881ed079f80
RDX: 0000000000000101 RSI: 0000000000000004 RDI: ffff8881f6f09c80
RBP: 1ffff1103c53e639 R08: dffffc0000000000 R09: 0000000000000003
R10: ffffed103ede1391 R11: 1ffff1103ede1390 R12: ffff8881e29f31c8
R13: dffffc0000000000 R14: ffff8881f6f09e20 R15: ffffffff81b99493
FS: 00007fdf3aaac700(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffff81b99493 CR3: 00000001e8741000 CR4: 00000000003406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<IRQ>
__run_timers+0x5e0/0x700 kernel/time/timer.c:1787
run_timer_softirq+0x46/0x80 kernel/time/timer.c:1800
__do_softirq+0x23e/0x643 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+0x113/0x440 arch/x86/kernel/apic/apic.c:1150
apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:834
</IRQ>
Modules linked in:
CR2: ffffffff81b99493
---[ end trace ff787c1089f40074 ]---
RIP: 0010:__hlist_del include/linux/list.h:773 [inline]
RIP: 0010:detach_timer kernel/time/timer.c:824 [inline]
RIP: 0010:expire_timers+0x155/0x400 kernel/time/timer.c:1452
Code: 08 3e 00 4d 89 3e 4d 85 ff 74 2a e8 55 97 0f 00 49 83 c7 08 4c 89 f8 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 ff e8 fb 07 3e 00 <4d> 89 37 eb 0b 66 0f 1f 44 00 00 e8 2b 97 0f 00 4d 89 ef 42 80 7c
RSP: 0018:ffff8881f6f09d08 EFLAGS: 00010046
RAX: 1ffffffff0373292 RBX: ffff8881e29f31c0 RCX: ffff8881ed079f80
RDX: 0000000000000101 RSI: 0000000000000004 RDI: ffff8881f6f09c80
RBP: 1ffff1103c53e639 R08: dffffc0000000000 R09: 0000000000000003
R10: ffffed103ede1391 R11: 1ffff1103ede1390 R12: ffff8881e29f31c8
R13: dffffc0000000000 R14: ffff8881f6f09e20 R15: ffffffff81b99493
FS: 00007fdf3aaac700(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffff81b99493 CR3: 00000001e8741000 CR4: 00000000003406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 08 3e or %bh,(%rsi)
2: 00 4d 89 add %cl,-0x77(%rbp)
5: 3e 4d 85 ff ds test %r15,%r15
9: 74 2a je 0x35
b: e8 55 97 0f 00 callq 0xf9765
10: 49 83 c7 08 add $0x8,%r15
14: 4c 89 f8 mov %r15,%rax
17: 48 c1 e8 03 shr $0x3,%rax
1b: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1)
20: 74 08 je 0x2a
22: 4c 89 ff mov %r15,%rdi
25: e8 fb 07 3e 00 callq 0x3e0825
* 2a: 4d 89 37 mov %r14,(%r15) <-- trapping instruction
2d: eb 0b jmp 0x3a
2f: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1)
35: e8 2b 97 0f 00 callq 0xf9765
3a: 4d 89 ef mov %r13,%r15
3d: 42 rex.X
3e: 80 .byte 0x80
3f: 7c .byte 0x7c