RAX: ffffffffffffffda RBX: 00007f8d60712c90 RCX: 0000000000457569
RDX: 0000000020000100 RSI: 0000000020000380 RDI: 0000000020000000
RBP: 000000000072bf00 R08: 0000000020000480 R09: 0000000000000000
R10: 0000000000000025 R11: 0000000000000246 R12: 00007f8d607136d4
R13: 00000000004c28f3 R14: 00000000004d3d20 R15: 0000000000000004
BUG: unable to handle kernel paging request at fffffffffffffff4
PGD 926d067 P4D 926d067 PUD 926f067 PMD 0 
Oops: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 20240 Comm: syz-executor0 Not tainted 4.19.0-rc7-next-20181012+ #93
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:parse_monolithic_mount_data fs/namespace.c:2369 [inline]
RIP: 0010:do_remount fs/namespace.c:2402 [inline]
RIP: 0010:do_mount+0xb98/0x1d90 fs/namespace.c:2965
Code: 06 00 48 89 c2 48 89 c3 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 8a 11 00 00 48 b8 00 00 00 00 00 fc ff df <4c> 8b 33 49 8d 7e 18 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 5e 11
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
RSP: 0018:ffff8801c55e7c28 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: fffffffffffffff4 RCX: ffffc90001e62000
RDX: 1ffffffffffffffe RSI: ffffffff81e08e2c RDI: 0000000000000286
RBP: ffff8801c55e7db0 R08: ffff880186884000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801d2e4ec30
R13: ffff880185080940 R14: ffff880185080940 R15: ffff8801853f0980
FS:  00007f8d60713700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffffffffffffff4 CR3: 00000001c35da000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 ksys_mount+0x12d/0x140 fs/namespace.c:3190
 __do_sys_mount fs/namespace.c:3204 [inline]
 __se_sys_mount fs/namespace.c:3201 [inline]
 __x64_sys_mount+0xbe/0x150 fs/namespace.c:3201
CPU: 0 PID: 20249 Comm: syz-executor2 Not tainted 4.19.0-rc7-next-20181012+ #93
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x244/0x3ab lib/dump_stack.c:113
 fail_dump lib/fault-inject.c:51 [inline]
 should_fail.cold.4+0xa/0x17 lib/fault-inject.c:149
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457569
Code: fd b3 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 b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f8d60712c78 EFLAGS: 00000246
 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f8d60712c90 RCX: 0000000000457569
RDX: 0000000020000100 RSI: 0000000020000380 RDI: 0000000020000000
RBP: 000000000072bf00 R08: 0000000020000480 R09: 0000000000000000
R10: 0000000000000025 R11: 0000000000000246 R12: 00007f8d607136d4
R13: 00000000004c28f3 R14: 00000000004d3d20 R15: 0000000000000004
Modules linked in:
CR2: fffffffffffffff4
---[ end trace 7d2b77ef73119750 ]---
 __should_failslab+0x124/0x180 mm/failslab.c:32
RIP: 0010:parse_monolithic_mount_data fs/namespace.c:2369 [inline]
RIP: 0010:do_remount fs/namespace.c:2402 [inline]
RIP: 0010:do_mount+0xb98/0x1d90 fs/namespace.c:2965
 should_failslab+0x9/0x14 mm/slab_common.c:1578
Code: 06 00 48 89 c2 48 89 c3 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 8a 11 00 00 48 b8 00 00 00 00 00 fc ff df <4c> 8b 33 49 8d 7e 18 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 5e 11
 slab_pre_alloc_hook mm/slab.h:423 [inline]
 slab_alloc mm/slab.c:3378 [inline]
 kmem_cache_alloc_trace+0x2d7/0x750 mm/slab.c:3618
RSP: 0018:ffff8801c55e7c28 EFLAGS: 00010246
 kmalloc include/linux/slab.h:546 [inline]
 kzalloc include/linux/slab.h:741 [inline]
 legacy_init_fs_context+0x187/0x230 fs/fs_context.c:777
RAX: dffffc0000000000 RBX: fffffffffffffff4 RCX: ffffc90001e62000
RDX: 1ffffffffffffffe RSI: ffffffff81e08e2c RDI: 0000000000000286
 vfs_new_fs_context+0x3f4/0x77c fs/fs_context.c:303
RBP: ffff8801c55e7db0 R08: ffff880186884000 R09: 0000000000000000
 do_remount fs/namespace.c:2398 [inline]
 do_mount+0xb70/0x1d90 fs/namespace.c:2965
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801d2e4ec30
R13: ffff880185080940 R14: ffff880185080940 R15: ffff8801853f0980
FS:  00007f8d60713700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffffffffffffff4 CR3: 00000001c35da000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400