page->mem_cgroup:ffff8801b3294380
 slab_pre_alloc_hook mm/slab.h:423 [inline]
 slab_alloc mm/slab.c:3378 [inline]
 kmem_cache_alloc+0x2af/0x760 mm/slab.c:3552
 getname_flags+0xd0/0x5a0 fs/namei.c:140
------------[ cut here ]------------
 getname+0x19/0x20 fs/namei.c:211
kernel BUG at mm/shmem.c:815!
 do_sys_open+0x3a2/0x720 fs/open.c:1100
invalid opcode: 0000 [#1] SMP KASAN
CPU: 0 PID: 4496 Comm: syz-executor035 Not tainted 4.18.0-rc3-next-20180706+ #1
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:shmem_undo_range+0xdaa/0x29a0 mm/shmem.c:815
 __do_sys_open fs/open.c:1124 [inline]
 __se_sys_open fs/open.c:1119 [inline]
 __x64_sys_open+0x7e/0xc0 fs/open.c:1119
Code: 
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
00 
0f 
85 
bd 
19 00 
00 
48 
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
8d 
RIP: 0033:0x401cd0
65 
Code: 
d8 
01 
5b 
f0 
41 
ff 
5c 
ff 
41 5d 
0f 
41 
83 
5e 
d0 
41 
0a 
5f 
00 
5d 
00 
c3 
c3 
e8 
66 
a5 
2e 
f0 
0f 
d6 
1f 
ff 
84 
48 
00 00 
c7 
00 
c6 
00 
e0 
00 
32 
0f 
f1 87 
1f 
4c 
44 
89 
00 
e7 
00 
e8 
83 
16 
3d 
10 
fd 
05 
69 
00 
2d 
<0f> 
00 
0b 
00 
e8 
75 
8f 
14 
f0 
b8 
d6 
02 
ff 
00 
49 
00 
8d 
00 
7c 
0f 
24 
05 
20 
<48> 
48 
3d 
89 
01 
f8 
f0 
48 
ff 
c1 
ff 
e8 
0f 
03 80 
83 
3c 
a4 
18 
0a 00 
00 
RSP: 0018:ffff8801ac4f6158 EFLAGS: 00010246
c3 
48 83 
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000000000
ec 
RDX: 0000000000000000 RSI: ffffffff81aaab95 RDI: ffffed003589ec18
08 
RBP: ffff8801ac4f68d0 R08: ffff8801b810c040 R09: fffffbfff11f1224
e8 
R10: fffffbfff11f1224 R11: ffffffff88f89123 R12: ffffea0007032d80
5a 
R13: ffff8801ac4f68a8 R14: 0000000000000000 R15: 00000000000006d8
01 
FS:  0000000000000000(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000
00 
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
00 
CR2: 0000000001880fd0 CR3: 0000000008e6a000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
RSP: 002b:00007fff5cef0438 EFLAGS: 00000246
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
 ORIG_RAX: 0000000000000002
Call Trace:
RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000401cd0
RDX: 00007fff5cef059a RSI: 0000000000000002 RDI: 00007fff5cef0590
RBP: 0000000000020000 R08: 0000000000000000 R09: 000000000000000a
R10: 0000000000000075 R11: 0000000000000246 R12: ffffffffffffffff
R13: 0000000000000004 R14: 0000000000000000 R15: 0000000000000000
 shmem_truncate_range+0x27/0xa0 mm/shmem.c:971
 shmem_evict_inode+0x3b2/0xcb0 mm/shmem.c:1071
 evict+0x4ae/0x990 fs/inode.c:558
 iput_final fs/inode.c:1508 [inline]
 iput+0x635/0xaa0 fs/inode.c:1534
 dentry_unlink_inode+0x4ae/0x640 fs/dcache.c:377
 __dentry_kill+0x44c/0x7a0 fs/dcache.c:569
 dentry_kill+0xc9/0x5a0 fs/dcache.c:688
 dput.part.26+0x66b/0x7a0 fs/dcache.c:849
 dput+0x15/0x20 fs/dcache.c:831
 __fput+0x558/0x930 fs/file_table.c:235
 ____fput+0x15/0x20 fs/file_table.c:251
 task_work_run+0x1ec/0x2a0 kernel/task_work.c:113
 exit_task_work include/linux/task_work.h:22 [inline]
 do_exit+0x1b08/0x2750 kernel/exit.c:869
 do_group_exit+0x177/0x440 kernel/exit.c:972
 get_signal+0x88e/0x1970 kernel/signal.c:2467
 do_signal+0x9c/0x21c0 arch/x86/kernel/signal.c:816
 exit_to_usermode_loop+0x2e0/0x370 arch/x86/entry/common.c:162
 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:268 [inline]
 do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x445ab7
Code: Bad RIP value.
RSP: 002b:00007fff5cef0438 EFLAGS: 00000213 ORIG_RAX: 0000000000000010
RAX: fffffffffffffff4 RBX: 0000000000000005 RCX: 0000000000445ab7
RDX: 0000000000000005 RSI: 0000000000004c00 RDI: 0000000000000006
RBP: 0000000000000006 R08: 0000000000000000 R09: 000000000000000a
R10: 0000000000000075 R11: 0000000000000213 R12: ffffffffffffffff
R13: 0000000000000004 R14: 0000000000000000 R15: 0000000000000000
Modules linked in:
Dumping ftrace buffer:
   (ftrace buffer empty)
---[ end trace 090d00196035019d ]---
RIP: 0010:shmem_undo_range+0xdaa/0x29a0 mm/shmem.c:815
Code: 00 0f 85 bd 19 00 00 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 a5 f0 d6 ff 48 c7 c6 e0 32 f1 87 4c 89 e7 e8 16 10 05 00 <0f> 0b e8 8f f0 d6 ff 49 8d 7c 24 20 48 89 f8 48 c1 e8 03 80 3c 18 
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
RSP: 0018:ffff8801ac4f6158 EFLAGS: 00010246
CPU: 1 PID: 4511 Comm: syz-executor035 Tainted: G      D           4.18.0-rc3-next-20180706+ #1
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000000000
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1c9/0x2b4 lib/dump_stack.c:113
RDX: 0000000000000000 RSI: ffffffff81aaab95 RDI: ffffed003589ec18
 fail_dump lib/fault-inject.c:51 [inline]
 should_fail.cold.4+0xa/0x11 lib/fault-inject.c:149
RBP: ffff8801ac4f68d0 R08: ffff8801b810c040 R09: fffffbfff11f1224
R10: fffffbfff11f1224 R11: ffffffff88f89123 R12: ffffea0007032d80
R13: ffff8801ac4f68a8 R14: 0000000000000000 R15: 00000000000006d8
FS:  0000000000000000(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000445a8d CR3: 0000000008e6a000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
 __should_failslab+0x124/0x180 mm/failslab.c:32
 should_failslab+0x9/0x14 mm/slab_common.c:1557