tmpfs: No value for mount option '$J)\'
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: 0 PID: 13641 Comm: syz-executor4 Not tainted 4.20.0-rc7-next-20181224 #190
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:transparent_hugepage_enabled+0x8c/0x5e0 mm/huge_memory.c:69
Code: 80 3c 02 00 0f 85 ae 04 00 00 4c 8b a3 a0 00 00 00 48 b8 00 00 00 00 00 fc ff df 49 8d bc 24 b8 01 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 91 04 00 00 49 8b bc 24 b8 01 00 00 e8 2d 70 e6
RSP: 0018:ffff88808b7bf1b8 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffff88809eb70528 RCX: ffffc9000e02c000
RDX: 0000000000000037 RSI: ffffffff81c8f3ea RDI: 00000000000001b8
RBP: ffff88808b7bf1e0 R08: ffffed100aef5115 R09: ffffed100aef5114
R10: ffffed100aef5114 R11: ffff8880577a88a7 R12: 0000000000000000
R13: ffff88809eb705c8 R14: 0000000000000544 R15: 0000000000000e30
FS:  00007f99414f6700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c435e5f000 CR3: 0000000098bae000 CR4: 00000000001406f0
DR0: 000000000000b8c4 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 show_smap+0x167/0x580 fs/proc/task_mmu.c:805
 seq_read+0xb81/0x1150 fs/seq_file.c:268
 do_loop_readv_writev fs/read_write.c:700 [inline]
 do_iter_read+0x4bc/0x670 fs/read_write.c:924
 vfs_readv+0x175/0x1c0 fs/read_write.c:986
 kernel_readv fs/splice.c:362 [inline]
 default_file_splice_read+0x539/0xb20 fs/splice.c:417
 do_splice_to+0x12e/0x190 fs/splice.c:880
 splice_direct_to_actor+0x31c/0x9d0 fs/splice.c:957
 do_splice_direct+0x2d4/0x420 fs/splice.c:1066
 do_sendfile+0x62a/0xe50 fs/read_write.c:1439
 __do_sys_sendfile64 fs/read_write.c:1500 [inline]
 __se_sys_sendfile64 fs/read_write.c:1486 [inline]
 __x64_sys_sendfile64+0x1fd/0x250 fs/read_write.c:1486
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457ec9
Code: 6d b7 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 3b b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f99414f5c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000457ec9
RDX: 0000000000000000 RSI: 0000000000000006 RDI: 0000000000000005
RBP: 000000000073bfa0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000000040d5 R11: 0000000000000246 R12: 00007f99414f66d4
R13: 00000000004c4b43 R14: 00000000004d8130 R15: 00000000ffffffff
Modules linked in:
---[ end trace 6dabad151e9cf062 ]---
RIP: 0010:transparent_hugepage_enabled+0x8c/0x5e0 mm/huge_memory.c:69
Code: 80 3c 02 00 0f 85 ae 04 00 00 4c 8b a3 a0 00 00 00 48 b8 00 00 00 00 00 fc ff df 49 8d bc 24 b8 01 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 91 04 00 00 49 8b bc 24 b8 01 00 00 e8 2d 70 e6
RSP: 0018:ffff88808b7bf1b8 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffff88809eb70528 RCX: ffffc9000e02c000
RDX: 0000000000000037 RSI: ffffffff81c8f3ea RDI: 00000000000001b8
RBP: ffff88808b7bf1e0 R08: ffffed100aef5115 R09: ffffed100aef5114
R10: ffffed100aef5114 R11: ffff8880577a88a7 R12: 0000000000000000
R13: ffff88809eb705c8 R14: 0000000000000544 R15: 0000000000000e30
FS:  00007f99414f6700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c4309dd000 CR3: 0000000098bae000 CR4: 00000000001406f0
DR0: 000000000000b8c4 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400