BUG: unable to handle page fault for address: ffffffffffffff6c
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 9a7c067 P4D 9a7c067 PUD 9a7e067 PMD 0 
Oops: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 7129 Comm: syz-executor.3 Not tainted 5.8.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:wait_consider_task+0xa9/0x3b20 kernel/exit.c:1269
Code: 00 00 00 31 c0 e8 77 ef 2d 00 4c 89 f8 48 c1 e8 03 0f b6 14 28 4c 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 40 1d 00 00 <45> 8b a6 74 04 00 00 bf 10 00 00 00 44 89 e6 e8 c3 eb 2d 00 41 83
RSP: 0018:ffffc90004f67c50 EFLAGS: 00010246
RAX: 0000000000000007 RBX: 0000000000000000 RCX: ffffffff81460b26
RDX: 0000000000000000 RSI: ffffffff8145cd19 RDI: ffffc90004f67e50
RBP: dffffc0000000000 R08: 0000000000000001 R09: ffffffff89a09083
R10: 0000000000000000 R11: 0000000000000000 R12: ffffc90004f67e50
R13: ffff8880645be400 R14: fffffffffffffaf8 R15: ffffffffffffff6c
FS:  0000000000000000(0000) GS:ffff8880ae700000(0063) knlGS:000000000a03c900
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: ffffffffffffff6c CR3: 00000000645c7000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 do_wait_thread kernel/exit.c:1378 [inline]
 do_wait+0x36a/0x9e0 kernel/exit.c:1449
 kernel_wait4+0x14c/0x260 kernel/exit.c:1621
 do_syscall_32_irqs_on+0x3f/0x60 arch/x86/entry/common.c:428
 __do_fast_syscall_32 arch/x86/entry/common.c:475 [inline]
 do_fast_syscall_32+0x7f/0x120 arch/x86/entry/common.c:503
 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c
RIP: 0023:0xf7f90569
Code: Bad RIP value.
RSP: 002b:00000000086afda8 EFLAGS: 00000246 ORIG_RAX: 0000000000000007
RAX: ffffffffffffffda RBX: 00000000ffffffff RCX: 00000000086afe0c
RDX: 0000000040000001 RSI: 0000000000041e19 RDI: 0000000000000000
RBP: 0000000000000005 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Modules linked in:
CR2: ffffffffffffff6c
---[ end trace b3c8bb62473cbdd6 ]---
RIP: 0010:wait_consider_task+0xa9/0x3b20 kernel/exit.c:1269
Code: 00 00 00 31 c0 e8 77 ef 2d 00 4c 89 f8 48 c1 e8 03 0f b6 14 28 4c 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 40 1d 00 00 <45> 8b a6 74 04 00 00 bf 10 00 00 00 44 89 e6 e8 c3 eb 2d 00 41 83
RSP: 0018:ffffc90004f67c50 EFLAGS: 00010246
RAX: 0000000000000007 RBX: 0000000000000000 RCX: ffffffff81460b26
RDX: 0000000000000000 RSI: ffffffff8145cd19 RDI: ffffc90004f67e50
RBP: dffffc0000000000 R08: 0000000000000001 R09: ffffffff89a09083
R10: 0000000000000000 R11: 0000000000000000 R12: ffffc90004f67e50
R13: ffff8880645be400 R14: fffffffffffffaf8 R15: ffffffffffffff6c
FS:  0000000000000000(0000) GS:ffff8880ae700000(0063) knlGS:000000000a03c900
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: ffffffffffffff6c CR3: 00000000645c7000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400