kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 2030 Comm: syz.5.442 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+0x74b/0xb60 kernel/time/timer.c:1817 Code: 89 ef e8 88 d8 3c 00 4d 89 65 00 4d 85 e4 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 RSP: 0018:ffff8881f6f09d40 EFLAGS: 00010802 RAX: 1bd5a00000000025 RBX: 1ffff1103d466639 RCX: dffffc0000000000 RDX: 0000000000000101 RSI: 0000000000000004 RDI: ffff8881f6f09cc0 RBP: ffff8881f6f09eb8 R08: 0000000000000004 R09: 0000000000000003 R10: ffffed103ede1398 R11: 1ffff1103ede1398 R12: dead00000000012a R13: ffff8881f6f09e00 R14: ffff8881ea3331c8 R15: 1ffff1103d466638 FS: 00007f048df5d6c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa301abff98 CR3: 00000001ecb5a000 CR4: 00000000003406a0 DR0: 0000000000000000 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:__read_once_size include/linux/compiler.h:268 [inline] RIP: 0010:compound_head include/linux/page-flags.h:174 [inline] RIP: 0010:release_pages+0x1b6/0xaa0 mm/swap.c:801 Code: 0c 48 c7 c7 88 be 2b 86 e8 97 e2 10 00 4c 3b 3d 08 28 af 04 0f 84 8f 01 00 00 49 8d 5f 08 48 89 d8 48 c1 e8 03 42 80 3c 28 00 <74> 08 48 89 df e8 70 e2 10 00 48 8b 1b 89 de 83 e6 01 31 ff e8 01 RSP: 0018:ffff8881dfed7700 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 1ffffd4000ee8e09 RBX: ffffea0007747048 RCX: ffff8881ce2fbf00 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8881cb3cb850 RBP: ffff8881dfed77e8 R08: dffffc0000000000 R09: fffff94000ef4277 R10: fffff94000ef4277 R11: 1ffffd4000ef4276 R12: 0000000000000fe8 R13: dffffc0000000000 R14: 0000000000000000 R15: ffffea0007747040 free_pages_and_swap_cache+0x86/0xa0 mm/swap_state.c:297 tlb_batch_pages_flush mm/mmu_gather.c:49 [inline] tlb_flush_mmu_free mm/mmu_gather.c:189 [inline] tlb_flush_mmu mm/mmu_gather.c:196 [inline] tlb_finish_mmu+0x175/0x300 mm/mmu_gather.c:277 exit_mmap+0x2db/0x520 mm/mmap.c:3193 __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: 0033:0x7f048f8f4969 Code: Bad RIP value. RSP: 002b:00007f048df5d038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: fffffffffffffff4 RBX: 00007f048fb1bfa0 RCX: 00007f048f8f4969 RDX: 0000200000000080 RSI: 00000000400454ca RDI: 000000000000000a RBP: 00007f048f976ab1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f048fb1bfa0 R15: 00007fffd2e57178 Modules linked in: ---[ end trace 1ea3d72454a22ca7 ]--- 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+0x74b/0xb60 kernel/time/timer.c:1817 Code: 89 ef e8 88 d8 3c 00 4d 89 65 00 4d 85 e4 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 RSP: 0018:ffff8881f6f09d40 EFLAGS: 00010802 RAX: 1bd5a00000000025 RBX: 1ffff1103d466639 RCX: dffffc0000000000 RDX: 0000000000000101 RSI: 0000000000000004 RDI: ffff8881f6f09cc0 RBP: ffff8881f6f09eb8 R08: 0000000000000004 R09: 0000000000000003 R10: ffffed103ede1398 R11: 1ffff1103ede1398 R12: dead00000000012a R13: ffff8881f6f09e00 R14: ffff8881ea3331c8 R15: 1ffff1103d466638 FS: 00007f048df5d6c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f048f8f493f CR3: 00000001ecb5a000 CR4: 00000000003406a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 ---------------- Code disassembly (best guess): 0: 89 ef mov %ebp,%edi 2: e8 88 d8 3c 00 call 0x3cd88f 7: 4d 89 65 00 mov %r12,0x0(%r13) b: 4d 85 e4 test %r12,%r12 e: 74 2e je 0x3e 10: e8 aa dd 0e 00 call 0xeddbf 15: 49 83 c4 08 add $0x8,%r12 19: 4c 89 e0 mov %r12,%rax 1c: 48 c1 e8 03 shr $0x3,%rax 20: 48 b9 00 00 00 00 00 movabs $0xdffffc0000000000,%rcx 27: fc ff df * 2a: 80 3c 08 00 cmpb $0x0,(%rax,%rcx,1) <-- trapping instruction 2e: 74 08 je 0x38 30: 4c 89 e7 mov %r12,%rdi 33: e8 57 d8 3c 00 call 0x3cd88f 38: 4d 89 2c 24 mov %r13,(%r12) 3c: eb 05 jmp 0x43 3e: e8 .byte 0xe8 3f: 7c .byte 0x7c