BUG: unable to handle page fault for address: ffffffff842a4f43 #PF: supervisor write access in kernel mode #PF: error_code(0x0003) - permissions violation PGD 5c11067 P4D 5c11067 PUD 5c12063 PMD 42001e1 Oops: 0003 [#1] PREEMPT SMP KASAN CPU: 0 PID: 2212 Comm: syz.3.515 Tainted: G W 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:ffff8881f6e09d40 EFLAGS: 00010046 RAX: 1ffffffff08549e8 RBX: 1ffff1103e83f639 RCX: dffffc0000000000 RDX: 0000000080000102 RSI: 0000000000000004 RDI: ffff8881f6e09cc0 RBP: ffff8881f6e09eb8 R08: 0000000000000004 R09: 0000000000000003 R10: ffffed103edc1398 R11: 1ffff1103edc1398 R12: ffffffff842a4f43 R13: ffff8881f6e09e00 R14: ffff8881f41fb1c8 R15: 1ffff1103e83f638 FS: 00007f20b6ced6c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffff842a4f43 CR3: 00000001d688b000 CR4: 00000000003406b0 DR0: 0000000000000000 DR1: 0000200000000300 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: <IRQ> 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 </IRQ> RIP: 0010:unlock_page_memcg+0x6/0xe0 mm/memcontrol.c:2167 Code: 89 df 4c 89 fe e8 aa a1 9a 02 e8 a5 df bd ff 5b 41 5c 41 5d 41 5e 41 5f 5d c3 66 2e 0f 1f 84 00 00 00 00 00 55 48 89 e5 41 57 <41> 56 41 55 41 54 53 48 89 fb 49 bc 00 00 00 00 00 fc ff df 48 83 RSP: 0018:ffff8881e92975c0 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 RAX: ffffffff81880249 RBX: ffffea00076c8400 RCX: ffff8881eac66e40 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffea00076c8400 RBP: ffff8881e92975c8 R08: dffffc0000000000 R09: fffff94000ed9087 R10: fffff94000ed9087 R11: 1ffffd4000ed9086 R12: ffffea00076c8418 R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000000 page_remove_file_rmap mm/rmap.c:1266 [inline] page_remove_rmap+0x5fb/0x800 mm/rmap.c:1317 zap_pte_range mm/memory.c:1105 [inline] zap_pmd_range mm/memory.c:1222 [inline] zap_pud_range mm/memory.c:1251 [inline] zap_p4d_range mm/memory.c:1272 [inline] unmap_page_range+0xe8f/0x1b20 mm/memory.c:1293 unmap_single_vma mm/memory.c:1338 [inline] unmap_vmas+0x245/0x340 mm/memory.c:1370 exit_mmap+0x2bb/0x520 mm/mmap.c:3191 __mmput+0x92/0x2e0 kernel/fork.c:1101 mmput+0x47/0x60 kernel/fork.c:1122 exit_mm kernel/exit.c:538 [inline] do_exit+0x99f/0x2660 kernel/exit.c:848 do_group_exit+0x13e/0x300 kernel/exit.c:984 get_signal+0xdee/0x13d0 kernel/signal.c:2738 do_signal+0xad/0xda0 arch/x86/kernel/signal.c:809 exit_to_usermode_loop+0xc4/0x1b0 arch/x86/entry/common.c:159 prepare_exit_to_usermode+0x18e/0x1f0 arch/x86/entry/common.c:194 syscall_return_slowpath arch/x86/entry/common.c:274 [inline] do_syscall_64+0x13e/0x170 arch/x86/entry/common.c:300 entry_SYSCALL_64_after_hwframe+0x5c/0xc1 RIP: 0033:0x7f20b8684969 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:00007f20b6ced0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: 0000000000000001 RBX: 00007f20b88abfa8 RCX: 00007f20b8684969 RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f20b88abfac RBP: 00007f20b88abfa0 R08: 00007ffd177150b0 R09: 0000000000000000 R10: 0000000000000004 R11: 0000000000000246 R12: 00007f20b88abfac R13: 0000000000000000 R14: 00007ffd176fafe0 R15: 00007ffd176fb0c8 Modules linked in: CR2: ffffffff842a4f43 ---[ end trace 59815f694159d915 ]--- 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:ffff8881f6e09d40 EFLAGS: 00010046 RAX: 1ffffffff08549e8 RBX: 1ffff1103e83f639 RCX: dffffc0000000000 RDX: 0000000080000102 RSI: 0000000000000004 RDI: ffff8881f6e09cc0 RBP: ffff8881f6e09eb8 R08: 0000000000000004 R09: 0000000000000003 R10: ffffed103edc1398 R11: 1ffff1103edc1398 R12: ffffffff842a4f43 R13: ffff8881f6e09e00 R14: ffff8881f41fb1c8 R15: 1ffff1103e83f638 FS: 00007f20b6ced6c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffff842a4f43 CR3: 00000001d688b000 CR4: 00000000003406b0 DR0: 0000000000000000 DR1: 0000200000000300 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