BUG: unable to handle page fault for address: ffffffff81a6cd28 #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: 358 Comm: syz-executor Not tainted 5.4.290-syzkaller-00017-g6b07fcd94a6a #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 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 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: 1ffffffff034d9a5 RBX: 1ffff1103cc21639 RCX: dffffc0000000000 RDX: 0000000080000103 RSI: 0000000000000004 RDI: ffff8881f6e09ce0 RBP: ffff8881f6e09ec8 R08: dffffc0000000000 R09: 0000000000000003 R10: ffffffffffffffff R11: dffffc0000000001 R12: ffff8881f6e09e20 R13: ffffffff81a6cd28 R14: 1ffff1103cc21638 R15: ffff8881e610b1c8 FS: 00005555937a7500(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffff81a6cd28 CR3: 00000001d6866000 CR4: 00000000003406b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 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:check_memory_region+0x1/0x280 mm/kasan/generic.c:190 Code: 5b 41 5c 41 5d 41 5e 41 5f 5d c3 48 c7 c7 bb 82 5a 85 eb 0a 48 c7 c7 f3 82 5a 85 4c 89 fe e8 6c 8f c1 02 31 db eb d7 90 90 55 <41> 57 41 56 53 b0 01 48 85 f6 0f 84 8e 01 00 00 48 89 fd 48 c1 ed RSP: 0018:ffff8881d701f730 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: ffffffff818ab85c RBX: dead000000000100 RCX: ffffffff818ab878 RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffea0007605b40 RBP: ffff8881d701f9d0 R08: ffffffff818ab84e R09: fffff94000ec0b6f R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000 R13: ffffea0007605b40 R14: 80000001d816d007 R15: 00007f6d3e7c0000 test_bit include/asm-generic/bitops-instrumented.h:237 [inline] PageSwapBacked include/linux/page-flags.h:340 [inline] mm_counter_file include/linux/mm.h:1794 [inline] mm_counter include/linux/mm.h:1803 [inline] copy_one_pte mm/memory.c:806 [inline] copy_pte_range mm/memory.c:855 [inline] copy_pmd_range mm/memory.c:906 [inline] copy_pud_range mm/memory.c:940 [inline] copy_p4d_range mm/memory.c:962 [inline] copy_page_range+0x1158/0x26f0 mm/memory.c:1024 dup_mmap kernel/fork.c:608 [inline] dup_mm kernel/fork.c:1379 [inline] copy_mm+0xb23/0x10d0 kernel/fork.c:1435 copy_process+0x1291/0x3230 kernel/fork.c:2052 _do_fork+0x197/0x900 kernel/fork.c:2399 __do_sys_clone kernel/fork.c:2557 [inline] __se_sys_clone kernel/fork.c:2538 [inline] __x64_sys_clone+0x26b/0x2c0 kernel/fork.c:2538 do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x5c/0xc1 RIP: 0033:0x7f6d3fe109d3 Code: 1f 84 00 00 00 00 00 64 48 8b 04 25 10 00 00 00 45 31 c0 31 d2 31 f6 bf 11 00 20 01 4c 8d 90 d0 02 00 00 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 89 c2 85 c0 75 2c 64 48 8b 04 25 10 00 00 RSP: 002b:00007fff5bd6ac18 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f6d3fe109d3 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000001 R10: 00005555937a77d0 R11: 0000000000000246 R12: 0000000000000001 R13: 00000000000927c0 R14: 000000000000d612 R15: 00007fff5bd6adb0 Modules linked in: CR2: ffffffff81a6cd28 ---[ end trace 54cb9034a501456c ]--- 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: 1ffffffff034d9a5 RBX: 1ffff1103cc21639 RCX: dffffc0000000000 RDX: 0000000080000103 RSI: 0000000000000004 RDI: ffff8881f6e09ce0 RBP: ffff8881f6e09ec8 R08: dffffc0000000000 R09: 0000000000000003 R10: ffffffffffffffff R11: dffffc0000000001 R12: ffff8881f6e09e20 R13: ffffffff81a6cd28 R14: 1ffff1103cc21638 R15: ffff8881e610b1c8 FS: 00005555937a7500(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffff81a6cd28 CR3: 00000001d6866000 CR4: 00000000003406b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 ---------------- 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