general protection fault: 0000 [#1] SMP PTI
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 7803 Comm: syz-executor5 Not tainted 4.16.0+ #87
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:get_freepointer mm/slub.c:270 [inline]
RIP: 0010:get_freepointer_safe mm/slub.c:285 [inline]
RIP: 0010:slab_alloc_node mm/slub.c:2706 [inline]
RIP: 0010:slab_alloc mm/slub.c:2745 [inline]
RIP: 0010:__kmalloc+0x13b/0x350 mm/slub.c:3785
RSP: 0018:ffff8801548ef990 EFLAGS: 00010286
RAX: 0000000000000000 RBX: ffff88021fd42090 RCX: ffff8801556b8000
RDX: 0000000000007f92 RSI: aaaaaaaaaaaab000 RDI: ffffea0000000000
RBP: ffff8801548ef9f0 R08: ffff88021f005980 R09: 0000000000000002
R10: 00000000000b3756 R11: 0000000000000000 R12: 2d636f6c6c616d6b
R13: ffff88021f005980 R14: ffff8801556b8918 R15: 00000000014080c0
FS:  0000000001e8f940(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000930008 CR3: 0000000154912000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 kmalloc include/linux/slab.h:517 [inline]
 kzalloc include/linux/slab.h:701 [inline]
 get_undo_list ipc/sem.c:1744 [inline]
 copy_semundo+0x1af/0x3f0 ipc/sem.c:2166
 copy_process+0x21fc/0x9bb0 kernel/fork.c:1779
 _do_fork+0x311/0xf00 kernel/fork.c:2088
 SYSC_clone+0xf6/0x110 kernel/fork.c:2195
 SyS_clone+0x77/0xa0 kernel/fork.c:2189
 do_syscall_64+0x309/0x430 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x3d/0xa2
RIP: 0033:0x457d19
RSP: 002b:0000000000a3e768 EFLAGS: 00000202 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007f7b2df52700 RCX: 0000000000457d19
RDX: 00007f7b2df529d0 RSI: 00007f7b2df51db0 RDI: 00000000003d0f00
RBP: 0000000000a3e8a0 R08: 00007f7b2df52700 R09: 00007f7b2df52700
R10: 00007f7b2df529d0 R11: 0000000000000202 R12: 0000000000000000
R13: 0000000000a3e81f R14: 00007f7b2df529c0 R15: 0000000000000000
Code: 8b 18 65 48 8b 53 08 65 48 03 1c 25 28 a1 02 00 4c 8b 23 4d 85 e4 0f 84 38 01 00 00 48 83 7b 10 00 0f 84 2d 01 00 00 49 63 40 20 <49> 8b 1c 04 48 89 d1 48 83 c1 01 49 8b 38 4c 89 e0 65 48 0f c7 
RIP: get_freepointer mm/slub.c:270 [inline] RSP: ffff8801548ef990
RIP: get_freepointer_safe mm/slub.c:285 [inline] RSP: ffff8801548ef990
RIP: slab_alloc_node mm/slub.c:2706 [inline] RSP: ffff8801548ef990
RIP: slab_alloc mm/slub.c:2745 [inline] RSP: ffff8801548ef990
RIP: __kmalloc+0x13b/0x350 mm/slub.c:3785 RSP: ffff8801548ef990
---[ end trace 7337d28d2a0919a7 ]---