BUG: unable to handle page fault for address: ffffffff81bd990a #PF: supervisor write access in kernel mode #PF: error_code(0x0003) - permissions violation PGD 5e11067 P4D 5e11067 PUD 5e12063 PMD 1a001e1 Oops: 0003 [#1] PREEMPT SMP KASAN CPU: 0 PID: 543 Comm: syz.0.41 Not tainted 5.4.290-syzkaller-00017-g6b07fcd94a6a #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+0x7be/0xbe0 kernel/time/timer.c:1817 Code: 74 2e e8 a5 66 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 51 3f 00 <4d> 89 65 00 eb 05 e8 77 66 0f 00 49 bd 00 00 00 00 00 fc ff df 42 RSP: 0018:ffff8881f6e09d60 EFLAGS: 00010046 RAX: 1ffffffff037b321 RBX: 1ffff1103a19a639 RCX: dffffc0000000000 RDX: 0000000080000102 RSI: 0000000000000004 RDI: ffff8881f6e09ce0 RBP: ffff8881f6e09ec8 R08: dffffc0000000000 R09: 0000000000000003 R10: ffffffffffffffff R11: dffffc0000000001 R12: ffff8881f6e09e20 R13: ffffffff81bd990a R14: 1ffff1103a19a638 R15: ffff8881d0cd31c8 FS: 0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffff81bd990a CR3: 0000000005e0e000 CR4: 00000000003406b0 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:539 [inline] smp_apic_timer_interrupt+0x11a/0x490 arch/x86/kernel/apic/apic.c:1161 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:834 RIP: 0010:arch_atomic_add_negative arch/x86/include/asm/atomic.h:154 [inline] RIP: 0010:atomic_add_negative include/asm-generic/atomic-instrumented.h:768 [inline] RIP: 0010:page_remove_file_rmap mm/rmap.c:1252 [inline] RIP: 0010:page_remove_rmap+0x1e0/0x810 mm/rmap.c:1317 Code: 0c 04 00 00 e8 91 c7 d5 ff 48 83 c3 40 eb bf e8 86 c7 d5 ff 49 8d 7f 30 be 04 00 00 00 e8 18 85 05 00 31 db f0 41 83 47 30 ff <40> 0f 99 c5 0f 98 c3 bf 02 00 00 00 89 de e8 6d c9 d5 ff 31 ff 89 RSP: 0018:ffff8881e7687558 EFLAGS: 00000213 ORIG_RAX: ffffffffffffff13 RAX: ffffffff818e8301 RBX: 0000000000000000 RCX: ffffffff818e8388 RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffea00075cbeb0 RBP: 0000000000000000 R08: dffffc0000000000 R09: fffff94000eb97d7 R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000 R13: 1ffffd4000eb97d1 R14: ffffea00075cbe88 R15: ffffea00075cbe80 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+0x10b7/0x2620 mm/memory.c:1293 unmap_single_vma mm/memory.c:1338 [inline] unmap_vmas+0x355/0x4b0 mm/memory.c:1370 exit_mmap+0x2bc/0x520 mm/mmap.c:3191 __mmput+0x8e/0x2c0 kernel/fork.c:1101 exit_mm kernel/exit.c:538 [inline] do_exit+0xc08/0x2bc0 kernel/exit.c:848 do_group_exit+0x138/0x300 kernel/exit.c:984 get_signal+0xdb1/0x1440 kernel/signal.c:2738 do_signal+0xb0/0x11f0 arch/x86/kernel/signal.c:809 exit_to_usermode_loop+0xc0/0x1a0 arch/x86/entry/common.c:159 prepare_exit_to_usermode+0x199/0x200 arch/x86/entry/common.c:194 entry_SYSCALL_64_after_hwframe+0x5c/0xc1 RIP: 0033:0x7fb07b9f6169 Code: Bad RIP value. RSP: 002b:00007fb07a03f038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: fffffffffffffff5 RBX: 00007fb07bc0f080 RCX: 00007fb07b9f6169 RDX: 0000000000000048 RSI: 0000400000000200 RDI: 0000000000000005 RBP: 00007fb07ba772a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fb07bc0f080 R15: 00007ffdb5b1dd18 Modules linked in: CR2: ffffffff81bd990a ---[ end trace bc2ba4ec9c631c35 ]--- 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 a5 66 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 51 3f 00 <4d> 89 65 00 eb 05 e8 77 66 0f 00 49 bd 00 00 00 00 00 fc ff df 42 RSP: 0018:ffff8881f6e09d60 EFLAGS: 00010046 RAX: 1ffffffff037b321 RBX: 1ffff1103a19a639 RCX: dffffc0000000000 RDX: 0000000080000102 RSI: 0000000000000004 RDI: ffff8881f6e09ce0 RBP: ffff8881f6e09ec8 R08: dffffc0000000000 R09: 0000000000000003 R10: ffffffffffffffff R11: dffffc0000000001 R12: ffff8881f6e09e20 R13: ffffffff81bd990a R14: 1ffff1103a19a638 R15: ffff8881d0cd31c8 FS: 0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb07b9f613f CR3: 0000000005e0e000 CR4: 00000000003406b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 74 2e je 0x30 2: e8 a5 66 0f 00 call 0xf66ac 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 51 3f 00 call 0x3f515c * 2a: 4d 89 65 00 mov %r12,0x0(%r13) <-- trapping instruction 2e: eb 05 jmp 0x35 30: e8 77 66 0f 00 call 0xf66ac 35: 49 bd 00 00 00 00 00 movabs $0xdffffc0000000000,%r13 3c: fc ff df 3f: 42 rex.X