WARNING: CPU: 2 PID: 3009 at arch/x86/kernel/traps.c:788 cond_local_irq_disable arch/x86/kernel/traps.c:97 [inline]
WARNING: CPU: 2 PID: 3009 at arch/x86/kernel/traps.c:788 do_debug+0x4d8/0x6e0 arch/x86/kernel/traps.c:802
Kernel panic - not syncing: panic_on_warn set ...

CPU: 2 PID: 3009 Comm: syz-executor0 Not tainted 4.13.0-rc5-next-20170817+ #5
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011
Call Trace:
 <#DB>
 __dump_stack lib/dump_stack.c:16 [inline]
 dump_stack+0x194/0x257 lib/dump_stack.c:52
 panic+0x1e4/0x417 kernel/panic.c:180
 __warn+0x1c4/0x1d9 kernel/panic.c:541
 report_bug+0x211/0x2d0 lib/bug.c:183
 fixup_bug+0x40/0x90 arch/x86/kernel/traps.c:190
 do_trap_no_signal arch/x86/kernel/traps.c:224 [inline]
 do_trap+0x260/0x390 arch/x86/kernel/traps.c:273
 do_error_trap+0x120/0x390 arch/x86/kernel/traps.c:310
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:323
 invalid_op+0x18/0x20 arch/x86/entry/entry_64.S:929
RIP: 0010:cond_local_irq_disable arch/x86/kernel/traps.c:97 [inline]
RIP: 0010:do_debug+0x4d8/0x6e0 arch/x86/kernel/traps.c:802
RSP: 0018:ffff88006de0fe98 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: ffff88006de0ff58 RCX: 1ffff1000dbc1f9d
RDX: 1ffff1000dbc1ffc RSI: 0000000000000001 RDI: ffffffff85ac6318
RBP: ffff88006de0ff48 R08: ffff88006de0ffe8 R09: 1ffff1000dbc1f99
R10: ffff88006de0fc90 R11: ffffffff85b34400 R12: 000000000000e001
R13: ffff880038b34300 R14: 1ffff1000dbc1fd8 R15: 0000000000004000
 debug+0x34/0x70 arch/x86/entry/entry_64.S:1080
RIP: 0010:do_strncpy_from_user lib/strncpy_from_user.c:44 [inline]
RIP: 0010:strncpy_from_user+0x188/0x430 lib/strncpy_from_user.c:117
RSP: 0018:ffff88003b177d28 EFLAGS: 00000246
RAX: 6d766b2f7665642f RBX: ffff88003b177dc0 RCX: 1ffffffff0b45202
RDX: 0000000000000000 RSI: 0000000000000fe4 RDI: ffff88003b177d88
RBP: ffff88003b177de8 R08: ffff88003e87c200 R09: ffff880068a52c40
R10: 0000000000000000 R11: ffffed000d14a787 R12: 0000000000000fe4
R13: 0000000000000fe4 R14: 0000000020000000 R15: 8080808080808080
 </#DB>
 getname_flags+0x10e/0x580 fs/namei.c:148
 getname+0x19/0x20 fs/namei.c:208
 do_sys_open+0x2e7/0x6d0 fs/open.c:1053
 SYSC_openat fs/open.c:1086 [inline]
 SyS_openat+0x30/0x40 fs/open.c:1080
 entry_SYSCALL_64_fastpath+0x1f/0xbe
RIP: 0033:0x446749
RSP: 002b:00007effb6178c08 EFLAGS: 00000292 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: ffffffffffffff9c RCX: 0000000000446749
RDX: 0000000000080000 RSI: 0000000020000000 RDI: ffffffffffffff9c
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000292 R12: 0000000000000000
R13: 0000000000000000 R14: 00007effb61799c0 R15: 00007effb6179700
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..