general protection fault: 0000 [#1] SMP PTI CPU: 1 PID: 12475 Comm: syz-executor2 Not tainted 4.18.0-rc8+ #33 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__hlist_del include/linux/list.h:651 [inline] RIP: 0010:detach_timer kernel/time/timer.c:817 [inline] RIP: 0010:expire_timers kernel/time/timer.c:1353 [inline] RIP: 0010:__run_timers+0xc3a/0x1170 kernel/time/timer.c:1666 Code: 2c b2 1a 00 49 83 c7 08 4d 85 f6 0f 85 b2 02 00 00 4c 89 ff e8 07 05 74 00 4c 89 20 4d 85 e4 4c 8b 74 24 40 0f 85 a7 02 00 00 <4d> 89 2f eb 1b 8b 7c 24 38 e8 f8 0d 74 00 4d 85 ff 75 c2 0f 1f 00 RSP: 0018:ffff88021fd0fda0 EFLAGS: 00010046 RAX: ffffffff8a1ae000 RBX: 0000000000000000 RCX: ffff880130848000 RDX: ffffffff8a1af000 RSI: 0000000000000008 RDI: dead000000000208 RBP: ffff88021fd0feb0 R08: 0000000000480020 R09: 0000000000000002 R10: 0000000000000000 R11: ffffffff814a9d10 R12: 0000000000000000 R13: ffff88021fd0fe30 R14: ffff880132fe7f00 R15: dead000000000208 FS: 00007f92300b9700(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f5c04ca5df8 CR3: 000000014ad8c000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: run_timer_softirq+0x43/0x70 kernel/time/timer.c:1692 __do_softirq+0x582/0x969 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x208/0x240 kernel/softirq.c:414 exiting_irq+0xe/0x10 arch/x86/include/asm/apic.h:527 smp_apic_timer_interrupt+0x64/0x90 arch/x86/kernel/apic/apic.c:1058 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:868 RIP: 0010:atomic_dec_and_test arch/x86/include/asm/atomic.h:122 [inline] RIP: 0010:page_ref_dec_and_test include/linux/page_ref.h:139 [inline] RIP: 0010:put_page_testzero include/linux/mm.h:519 [inline] RIP: 0010:release_pages+0x36d/0x1650 mm/swap.c:752 Code: c6 45 d3 00 48 85 db 0f 85 ea 01 00 00 48 89 5d b8 48 85 db 4c 8b ad 70 ff ff ff 4c 8b 75 a8 0f 85 df 01 00 00 f0 41 ff 4e 34 <0f> 94 45 d3 0f b6 5d d3 48 8d 7d d3 e8 82 44 26 00 0f b6 00 84 c0 RSP: 0018:ffff88011830f050 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff13 RAX: ffff88011822f153 RBX: 0000000000000000 RCX: ffff88011936f150 RDX: ffff88011936f150 RSI: aaaaaaaaaaaab000 RDI: ffffea00069125a0 RBP: ffff88011830f180 R08: 0000000000480001 R09: 0000000000000002 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: ffff8801308488f8 R14: ffffea0008322d20 R15: 00000000b0c000b2 free_pages_and_swap_cache+0x54b/0x570 mm/swap_state.c:319 tlb_flush_mmu_free mm/memory.c:260 [inline] zap_pte_range mm/memory.c:1401 [inline] zap_pmd_range mm/memory.c:1436 [inline] zap_pud_range mm/memory.c:1465 [inline] zap_p4d_range mm/memory.c:1486 [inline] unmap_page_range+0x34a8/0x3b60 mm/memory.c:1507 unmap_single_vma+0x445/0x5e0 mm/memory.c:1552 unmap_vmas+0x241/0x370 mm/memory.c:1582 exit_mmap+0x4d7/0x960 mm/mmap.c:3094 __mmput+0x154/0x5f0 kernel/fork.c:994 mmput+0xa7/0xe0 kernel/fork.c:1015 exit_mm+0x6dd/0x790 kernel/exit.c:545 do_exit+0xbf7/0x3890 kernel/exit.c:854 do_group_exit+0x1a0/0x350 kernel/exit.c:970 get_signal+0x1425/0x1ef0 kernel/signal.c:2468 do_signal+0x120/0x2090 arch/x86/kernel/signal.c:816 exit_to_usermode_loop arch/x86/entry/common.c:162 [inline] prepare_exit_to_usermode+0x273/0x410 arch/x86/entry/common.c:197 syscall_return_slowpath+0xdb/0x700 arch/x86/entry/common.c:268 do_syscall_64+0x1ab/0x220 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x63/0xe7 RIP: 0033:0x457089 Code: fd b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 cb b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f92300b8cf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: 0000000000000001 RBX: 0000000000930148 RCX: 0000000000457089 RDX: 0000000000000014 RSI: 0000000000000001 RDI: 000000000093014c RBP: 0000000000930140 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000093014c R13: 0000000000a3fb9f R14: 00007f92300b99c0 R15: 0000000000000001 Modules linked in: Dumping ftrace buffer: (ftrace buffer empty) ---[ end trace cb03d49e87cf9075 ]--- RIP: 0010:__hlist_del include/linux/list.h:651 [inline] RIP: 0010:detach_timer kernel/time/timer.c:817 [inline] RIP: 0010:expire_timers kernel/time/timer.c:1353 [inline] RIP: 0010:__run_timers+0xc3a/0x1170 kernel/time/timer.c:1666 Code: 2c b2 1a 00 49 83 c7 08 4d 85 f6 0f 85 b2 02 00 00 4c 89 ff e8 07 05 74 00 4c 89 20 4d 85 e4 4c 8b 74 24 40 0f 85 a7 02 00 00 <4d> 89 2f eb 1b 8b 7c 24 38 e8 f8 0d 74 00 4d 85 ff 75 c2 0f 1f 00 RSP: 0018:ffff88021fd0fda0 EFLAGS: 00010046 RAX: ffffffff8a1ae000 RBX: 0000000000000000 RCX: ffff880130848000 RDX: ffffffff8a1af000 RSI: 0000000000000008 RDI: dead000000000208 RBP: ffff88021fd0feb0 R08: 0000000000480020 R09: 0000000000000002 R10: 0000000000000000 R11: ffffffff814a9d10 R12: 0000000000000000 R13: ffff88021fd0fe30 R14: ffff880132fe7f00 R15: dead000000000208 FS: 00007f92300b9700(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f5c04ca5df8 CR3: 000000014ad8c000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400