BUG: unable to handle page fault for address: ffffffff8193ffdb #PF: supervisor write access in kernel mode #PF: error_code(0x0003) - permissions violation PGD 5c11067 P4D 5c11067 PUD 5c12063 PMD 18001e1 Oops: 0003 [#1] PREEMPT SMP KASAN CPU: 1 PID: 806 Comm: syz.1.126 Not tainted 5.4.292-syzkaller-00021-gcd8e74fa0fa3 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 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+0x759/0xb60 kernel/time/timer.c:1817 Code: 74 2e e8 aa dd 0e 00 49 83 c4 08 4c 89 e0 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 80 3c 08 00 74 08 4c 89 e7 e8 57 d8 3c 00 <4d> 89 2c 24 eb 05 e8 7c dd 0e 00 49 bd 00 00 00 00 00 fc ff df 42 RSP: 0018:ffff8881f6f09d40 EFLAGS: 00010046 RAX: 1ffffffff0327ffb RBX: 1ffff1103c0a7e39 RCX: dffffc0000000000 RDX: 0000000000000101 RSI: 0000000000000004 RDI: ffff8881f6f09cc0 RBP: ffff8881f6f09eb8 R08: 0000000000000004 R09: 0000000000000003 R10: ffffed103ede1398 R11: 1ffff1103ede1398 R12: ffffffff8193ffdb R13: ffff8881f6f09e08 R14: ffff8881e053f1c8 R15: 1ffff1103c0a7e38 FS: 00007fc78c9ba6c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffff8193ffdb CR3: 00000001d579a000 CR4: 00000000003406a0 DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: run_timer_softirq+0x6a/0xf0 kernel/time/timer.c:1830 __do_softirq+0x236/0x660 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x197/0x1c0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:539 [inline] smp_apic_timer_interrupt+0x11d/0x490 arch/x86/kernel/apic/apic.c:1161 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:834 RIP: 0010:search_extable+0x0/0xd0 lib/extable.c:119 Code: f1 80 e1 07 80 c1 03 38 c1 0f 8c 5e fe ff ff 4c 89 f7 e8 63 e1 6b fd e9 51 fe ff ff 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 <55> 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 e4 e0 48 83 ec 60 48 RSP: 0018:ffff8881ea227918 EFLAGS: 00000a07 ORIG_RAX: ffffffffffffff13 RAX: ffffffff84602000 RBX: ffffffff84263391 RCX: 000000000000179a RDX: ffffffff84263391 RSI: 00000000000007de RDI: ffffffff84602000 RBP: ffff8881ea227928 R08: 0000000000000001 R09: ffffed103e1fb140 R10: ffffed103e1fb140 R11: 1ffff1103e1fb13f R12: ffff8881ea227c58 R13: 1ffff1103d444f9c R14: dffffc0000000000 R15: 000000000000000e fixup_exception+0x54/0xd0 arch/x86/mm/extable.c:174 no_context+0xf5/0xad0 arch/x86/mm/fault.c:747 __bad_area_nosemaphore+0x9c/0x420 arch/x86/mm/fault.c:915 __bad_area arch/x86/mm/fault.c:936 [inline] bad_area+0x6a/0x80 arch/x86/mm/fault.c:942 do_user_addr_fault arch/x86/mm/fault.c:1407 [inline] __do_page_fault+0x92a/0xb20 arch/x86/mm/fault.c:1505 do_page_fault+0x37/0x320 arch/x86/mm/fault.c:1529 page_fault+0x2f/0x40 arch/x86/entry/entry_64.S:1206 RIP: 0010:__get_user_4+0x21/0x30 arch/x86/lib/getuser.S:78 Code: 50 ff 31 c0 0f 01 ca c3 90 48 83 c0 03 72 58 65 48 8b 14 25 80 8d 02 00 48 3b 82 98 0b 00 00 73 46 48 19 d2 48 21 d0 0f 01 cb <8b> 50 fd 31 c0 0f 01 ca c3 66 0f 1f 44 00 00 48 83 c0 07 72 28 65 RSP: 0018:ffff8881ea227d08 EFLAGS: 00050202 RAX: 0000000000000007 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffffffffffffffff RSI: 0000000000000000 RDI: ffff8881ea227e50 RBP: ffff8881ea227d50 R08: dffffc0000000000 R09: ffff8881ea227de0 R10: ffffed103d444fca R11: 1ffff1103d444fbc R12: 0000000000000004 R13: ffff8881ea227de0 R14: ffff8881ea227de0 R15: 0000000000000000 __do_sys_perf_event_open kernel/events/core.c:11075 [inline] __se_sys_perf_event_open+0xd3/0x1a90 kernel/events/core.c:11053 __x64_sys_perf_event_open+0xbf/0xd0 kernel/events/core.c:11053 do_syscall_64+0xcf/0x170 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x5c/0xc1 RIP: 0033:0x7fc78e351969 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fc78c9ba038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007fc78e578fa0 RCX: 00007fc78e351969 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00007fc78e3d3ab1 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fc78e578fa0 R15: 00007fffd2c7c908 Modules linked in: CR2: ffffffff8193ffdb ---[ end trace cb5ea5fc12c50f34 ]--- 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+0x759/0xb60 kernel/time/timer.c:1817 Code: 74 2e e8 aa dd 0e 00 49 83 c4 08 4c 89 e0 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 80 3c 08 00 74 08 4c 89 e7 e8 57 d8 3c 00 <4d> 89 2c 24 eb 05 e8 7c dd 0e 00 49 bd 00 00 00 00 00 fc ff df 42 RSP: 0018:ffff8881f6f09d40 EFLAGS: 00010046 RAX: 1ffffffff0327ffb RBX: 1ffff1103c0a7e39 RCX: dffffc0000000000 RDX: 0000000000000101 RSI: 0000000000000004 RDI: ffff8881f6f09cc0 RBP: ffff8881f6f09eb8 R08: 0000000000000004 R09: 0000000000000003 R10: ffffed103ede1398 R11: 1ffff1103ede1398 R12: ffffffff8193ffdb R13: ffff8881f6f09e08 R14: ffff8881e053f1c8 R15: 1ffff1103c0a7e38 FS: 00007fc78c9ba6c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffff8193ffdb CR3: 00000001d579a000 CR4: 00000000003406a0 DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 ---------------- Code disassembly (best guess): 0: 74 2e je 0x30 2: e8 aa dd 0e 00 call 0xeddb1 7: 49 83 c4 08 add $0x8,%r12 b: 4c 89 e0 mov %r12,%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 e7 mov %r12,%rdi 25: e8 57 d8 3c 00 call 0x3cd881 * 2a: 4d 89 2c 24 mov %r13,(%r12) <-- trapping instruction 2e: eb 05 jmp 0x35 30: e8 7c dd 0e 00 call 0xeddb1 35: 49 bd 00 00 00 00 00 movabs $0xdffffc0000000000,%r13 3c: fc ff df 3f: 42 rex.X