general protection fault in notifier_call

Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported
BUG: unable to handle kernel paging request in ttwu_do_activate kernel				1	2361d	2361d
IDTVectoring: info=00000000 errcode=00000000
TSC Offset = 0xffffff71eae3f3e4
EPT pointer = 0x00000001c30f801e
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] SMP KASAN
CPU: 0 PID: 14438 Comm: syz-executor4 Not tainted 4.18.0-rc2+ #124
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:notifier_call_chain+0x19e/0x390 kernel/notifier.c:96
Code: 48 8b b5 20 ff ff ff e8 90 84 6e 06 4c 8b bd 28 ff ff ff 89 85 34 ff ff ff 4d 85 ff 74 30 e8 e9 20 2a 00 48 8b 85 10 ff ff ff <42> 0f b6 14 20 4c 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 
RSP: 0018:ffff8801985d4258 EFLAGS: 00010006
RAX: 0000000000000000 RBX: ffffffff88ff3000 RCX: ffffffff8151ec72
RDX: 0000000040000002 RSI: ffffffff8151eb87 RDI: ffffffff88ff2b40
RBP: ffff8801985d4358 R08: ffff8801996f8680 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000
R13: 00000000ffffffff R14: ffffed00330ba85e R15: ffffed00330ba8b7
FS:  00007ffa69029700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000000000c CR3: 00000001bfbbd000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __atomic_notifier_call_chain kernel/notifier.c:183 [inline]
 atomic_notifier_call_chain+0x98/0x190 kernel/notifier.c:193
 notify_die+0x1be/0x2e0 kernel/notifier.c:549
 do_general_protection+0x248/0x2f0 arch/x86/kernel/traps.c:559
 general_protection+0x1e/0x30 arch/x86/entry/entry_64.S:1159
RIP: 0010:vsnprintf+0x138e/0x1b60 lib/vsprintf.c:2330
Code: 8b 85 70 ff ff ff 45 89 e5 41 83 c4 08 44 89 20 4c 03 68 10 e8 d3 cb ec f9 4c 89 e8 48 b9 00 00 00 00 00 fc ff df 48 c1 e8 03 <0f> b6 14 08 4c 89 e8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 7d 
RSP: 0018:ffff8801985d4558 EFLAGS: 00010806
RAX: 1bffff8000000000 RBX: ffff8801dae21680 RCX: dffffc0000000000
RDX: 0000000040000002 RSI: ffffffff878f409d RDI: ffff8801985d46f8
RBP: ffff8801985d4628 R08: ffff8801996f8680 R09: ffffed003b5c42cc
R10: ffffed003b5c42cc R11: ffff8801dae21663 R12: 00000000330ba8eb
R13: dffffc0000000000 R14: ffffffff87e7a77f R15: ffff8801985d4600
 ? no_context+0
Lost 208 message(s)!