general protection fault in copy_user_enhanced_fast

Kernel	Title	Rank 🛈	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
linux-4.14	general protection fault in copy_user_enhanced_fast_string	2				1	2668d	2668d	0/1	auto-closed as invalid on 2019/10/18 23:27
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] SMP KASAN
Dumping ftrace buffer:
FAULT_FLAG_ALLOW_RETRY missing 30
CPU: 1 PID: 3728 Comm: syz-executor5 Not tainted 4.15.0-rc6-mm1+ #50
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x137/0x198 lib/dump_stack.c:53
 handle_userfault+0x744/0x1750 fs/userfaultfd.c:430
 do_anonymous_page mm/memory.c:3189 [inline]
 handle_pte_fault mm/memory.c:3963 [inline]
 __handle_mm_fault+0x2fc5/0x3210 mm/memory.c:4089
 handle_mm_fault+0x305/0x840 mm/memory.c:4126
 __do_page_fault+0x59e/0xca0 arch/x86/mm/fault.c:1429
 do_page_fault+0x78/0x490 arch/x86/mm/fault.c:1504
 page_fault+0x2c/0x60 arch/x86/entry/entry_64.S:1243
RIP: 0010:copy_user_enhanced_fast_string+0xe/0x20 arch/x86/lib/copy_user_64.S:180
RSP: 0018:ffff8801d5677e68 EFLAGS: 00010246
RAX: ffffed003aacefe1 RBX: 0000000020012fa0 RCX: 0000000000000040
RDX: 0000000000000040 RSI: 0000000020012fa0 RDI: ffff8801d5677ec8
RBP: ffff8801d5677e98 R08: ffffed003aacefe1 R09: ffffed003aacefe1
R10: 0000000000000008 R11: ffffed003aacefe0 R12: 0000000000000040
R13: ffff8801d5677ec8 R14: 00007ffffffff000 R15: 0000000020012fe0
 copy_from_user include/linux/uaccess.h:147 [inline]
 SYSC_timer_create kernel/time/posix-timers.c:584 [inline]
 SyS_timer_create+0x85/0xf0 kernel/time/posix-timers.c:577
 entry_SYSCALL_64_fastpath+0x23/0x9a
RIP: 0033:0x452ac9
RSP: 002b:00007f2c9cbc2c58 EFLAGS: 00000212 ORIG_RAX: 00000000000000de
RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000452ac9
RDX: 0000000020000000 RSI: 0000000020012fa0 RDI: 0000000000000000
RBP: 00000000000005ea R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f6e90
R13: 00000000ffffffff R14: 00007f2c9cbc36d4 R15: 0000000000000000
FAULT_FLAG_ALLOW_RETRY missing 30
CPU: 1 PID: 3728 Comm: syz-executor5 Not tainted 4.15.0-rc6-mm1+ #50
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x137/0x198 lib/dump_stack.c:53
 handle_userfault+0x744/0x1750 fs/userfaultfd.c:430
 do_anonymous_page mm/memory.c:3189 [inline]
 handle_pte_fault mm/memory.c:3963 [inline]
 __handle_mm_fault+0x2fc5/0x3210 mm/memory.c:4089
 handle_mm_fault+0x305/0x840 mm/memory.c:4126
 __do_page_fault+0x59e/0xca0 arch/x86/mm/fault.c:1429
 do_page_fault+0x78/0x490 arch/x86/mm/fault.c:1504
 page_fault+0x2c/0x60 arch/x86/entry/entry_64.S:1243
RIP: 0010:copy_user_enhanced_fast_string+0xe/0x20 arch/x86/lib/copy_user_64.S:180
RSP: 0018:ffff8801d5677e68 EFLAGS: 00010246
RAX: ffffed003aacefe1 RBX: 0000000020012fa0 RCX: 0000000000000040
RDX: 0000000000000040 RSI: 0000000020012fa0 RDI: ffff8801d5677ec8
RBP: ffff8801d5677e98 R08: ffffed003aacefe1 R09: ffffed003aacefe1
R10: 0000000000000008 R11: ffffed003aacefe0 R12: 0000000000000040
R13: ffff8801d5677ec8 R14: 00007ffffffff000 R15: 0000000020012fe0
 copy_from_user include/linux/uaccess.h:147 [inline]
 SYSC_timer_create kernel/time/posix-timers.c:584 [inline]
 SyS_timer_create+0x85/0xf0 kernel/time/posix-timers.c:577
 entry_SYSCALL_64_fastpath+0x23/0x9a
RIP: 0033:0x452ac9
RSP: 002b:00007f2c9cbc2c58 EFLAGS: 00000212 ORIG_RAX: 00000000000000de
RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000452ac9
RDX: 0000000020000000 RSI: 0000000020012fa0 RDI: 0000000000000000
RBP: 00000000000005ea R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f6e90
R13: 00000000ffffffff R14: 00007f2c9cbc36d4 R15: 0000000000000000
   (ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 3721 Comm: syz-executor2 Not tainted 4.15.0-rc6-mm1+ #50
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:native_write_cr4+0x4/0x10 arch/x86/include/asm/special_insns.h:76
RSP: 0018:ffff8801a7bf7b18 EFLAGS: 00010093
RAX: ffff8801d5a960c0 RBX: 00000000001606f0 RCX: ffffffff8115d7c2
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000001606f0
RBP: ffff8801a7bf7b18 R08: ffffffff8105f787 R09: 0000000000000004
R10: ffff8801a7bf7b30 R11: 0000000000000001 R12: 0000000000000093
R13: ffff8801d5a960c0 R14: ffff8801db41a130 R15: ffff8801db41a130
FS:  0000000001783940(0000) GS:ffff8801db400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd6fd9bb000 CR3: 0000000005e22004 CR4: 00000000001626f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __write_cr4 arch/x86/include/asm/paravirt.h:76 [inline]
 __cr4_set arch/x86/include/asm/tlbflush.h:252 [inline]
 cr4_clear_bits arch/x86/include/asm/tlbflush.h:275 [inline]
 kvm_cpu_vmxoff arch/x86/kvm/vmx.c:3737 [inline]
 hardware_disable+0x34a/0x4b0 arch/x86/kvm/vmx.c:3743
 kvm_arch_hardware_disable+0x35/0xd0 arch/x86/kvm/x86.c:8110
 hardware_disable_nolock+0x30/0x40 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3284
 on_each_cpu+0xca/0x1b0 kernel/smp.c:604
 hardware_disable_all_nolock+0x3e/0x50 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3302
 hardware_disable_all arch/x86/kvm/../../../virt/kvm/kvm_main.c:3308 [inline]
 kvm_destroy_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:737 [inline]
 kvm_put_kvm+0x69c/0xa70 arch/x86/kvm/../../../virt/kvm/kvm_main.c:750
 kvm_vm_release+0x42/0x50 arch/x86/kvm/../../../virt/kvm/kvm_main.c:761
 __fput+0x291/0x6e0 fs/file_table.c:209
 ____fput+0x15/0x20 fs/file_table.c:243
 task_work_run+0x122/0x1a0 kernel/task_work.c:113
 exit_task_work include/linux/task_work.h:22 [inline]
 do_exit+0x7f4/0x2da0 kernel/exit.c:869
 do_group_exit+0x108/0x320 kernel/exit.c:972
 SYSC_exit_group kernel/exit.c:983 [inline]
 SyS_exit_group+0x1d/0x20 kernel/exit.c:981
 entry_SYSCALL_64_fastpath+0x23/0x9a
RIP: 0033:0x452ac9
RSP: 002b:0000000000a2fa08 EFLAGS: 00000202 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 000000000071bec8 RCX: 0000000000452ac9
RDX: 0000000000452ac9 RSI: 0000000000721070 RDI: 0000000000000000
RBP: 0000000000000000 R08: 000000000000001d R09: 000000000040e9c0
R10: 0000000000721068 R11: 0000000000000202 R12: 0000000000a2f9b0
R13: 000000000071bea0 R14: 00000000000004f0 R15: 0000000000000011
Code: 0f 1f 80 00 00 00 00 55 48 89 e5 0f 20 d8 5d c3 0f 1f 80 00 00 00 00 55 48 89 e5 0f 22 df 5d c3 0f 1f 80 00 00 00 00 55 48 89 e5 <0f> 22 e7 5d c3 0f 1f 80 00 00 00 00 55 48 89 e5 44 0f 20 c0 5d 
RIP: native_write_cr4+0x4/0x10 arch/x86/include/asm/special_insns.h:76 RSP: ffff8801a7bf7b18
---[ end trace d5a0e588eddd1a9f ]---