BUG: unable to handle kernel paging request at 0000000000bea9b8
IP: memcmp+0x9/0x40 lib/string.c:860
PGD 2141ac067 P4D 2141ac067 PUD 1dc311067 PMD 209ee6067 PTE 0
Oops: 0000 [#1] SMP
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 26173 Comm: syz-executor5 Not tainted 4.15.0-rc3-next-20171214+ #67
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:memcmp+0x9/0x40 lib/string.c:860
RSP: 0018:ffffc90000d6be98 EFLAGS: 00010202
RAX: 0000000000bea9e0 RBX: ffffffffffffffd8 RCX: 0000000000000004
RDX: 0000000000000004 RSI: ffffc90000d6bee4 RDI: 0000000000bea9b8
RBP: ffffc90000d6be98 R08: 0000000000000001 R09: 0000000000000002
R10: ffffc90000d6be30 R11: 0000000000000002 R12: ffff8801e1e1dbd8
R13: ffffc90000d6bf20 R14: ffff8801e2b10800 R15: 0000000000000068
FS:  00007f5c6cf59700(0000) GS:ffff88021fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000bea9b8 CR3: 00000001e2f33000 CR4: 00000000001426f0
DR0: 0000000020000000 DR1: 0000000020000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 memcmp include/linux/string.h:385 [inline]
 rhashtable_compare include/linux/rhashtable.h:612 [inline]
 __rhashtable_lookup include/linux/rhashtable.h:634 [inline]
 rhashtable_lookup include/linux/rhashtable.h:666 [inline]
 rhashtable_lookup_fast include/linux/rhashtable.h:692 [inline]
 ipc_findkey ipc/util.c:183 [inline]
 ipcget_public ipc/util.c:378 [inline]
 ipcget+0x1a2/0x620 ipc/util.c:654
 SYSC_shmget ipc/shm.c:675 [inline]
 SyS_shmget+0x52/0x60 ipc/shm.c:659
 entry_SYSCALL_64_fastpath+0x1f/0x96
RIP: 0033:0x452a39
RSP: 002b:00007f5c6cf58c58 EFLAGS: 00000212 ORIG_RAX: 000000000000001d
RAX: ffffffffffffffda RBX: 0000000000758020 RCX: 0000000000452a39
RDX: 0000000000000502 RSI: 0000000000001000 RDI: 00000000798dd82a
RBP: 000000000000060d R08: 0000000000000000 R09: 0000000000000000
R10: 000000002089e000 R11: 0000000000000212 R12: 00000000006f71d8
R13: 00000000ffffffff R14: 00007f5c6cf596d4 R15: 0000000000000000
Code: 74 1a 48 01 fa 48 89 f8 eb 07 0f b6 08 39 f1 74 09 48 83 c0 01 48 39 d0 75 f0 5d c3 48 89 f8 5d c3 90 55 48 85 d2 48 89 e5 74 2e <0f> b6 07 0f b6 0e 29 c8 75 1e 48 01 fa eb 0c 0f b6 0f 44 0f b6 
RIP: memcmp+0x9/0x40 lib/string.c:860 RSP: ffffc90000d6be98
CR2: 0000000000bea9b8
---[ end trace 8571ab96beb0e71b ]---
Kernel panic - not syncing: Fatal exception
Dumping ftrace buffer:
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Kernel Offset: disabled
Rebooting in 86400 seconds..