BUG: unable to handle page fault for address: ffffffffffffff6c
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 987c067 P4D 987c067 PUD 987e067 PMD 0 
Oops: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 7562 Comm: syz-executor.4 Not tainted 5.7.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__read_once_size include/linux/compiler.h:199 [inline]
RIP: 0010:wait_consider_task+0xad/0x37a0 kernel/exit.c:1260
Code: 74 04 00 00 48 89 c8 48 89 4c 24 08 48 c1 e8 03 42 0f b6 14 20 48 89 c8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 2d 1a 00 00 <44> 8b a5 74 04 00 00 bf 10 00 00 00 44 89 e6 e8 3f e1 2d 00 41 83
RSP: 0018:ffffc90006f2fc40 EFLAGS: 00010246
RAX: 0000000000000007 RBX: 0000000000000000 RCX: ffffffffffffff6c
RDX: 0000000000000000 RSI: ffffffff81454e90 RDI: ffffc90006f2fe40
RBP: fffffffffffffaf8 R08: ffff888057f56600 R09: fffffbfff1301219
R10: ffffffff898090c3 R11: fffffbfff1301218 R12: dffffc0000000000
R13: fffffffffffffaf8 R14: 0000000000000000 R15: ffffc90006f2fe40
FS:  0000000000000000(0000) GS:ffff8880ae700000(0063) knlGS:00000000090ab900
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: ffffffffffffff6c CR3: 0000000057eba000 CR4: 00000000001426e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 do_wait_thread kernel/exit.c:1369 [inline]
 do_wait+0x442/0xa00 kernel/exit.c:1440
 kernel_wait4+0x14c/0x260 kernel/exit.c:1612
 do_syscall_32_irqs_on arch/x86/entry/common.c:337 [inline]
 do_fast_syscall_32+0x270/0xe90 arch/x86/entry/common.c:396
 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139
Modules linked in:
CR2: ffffffffffffff6c
---[ end trace 8c0f08f6ce7fdbb7 ]---
RIP: 0010:__read_once_size include/linux/compiler.h:199 [inline]
RIP: 0010:wait_consider_task+0xad/0x37a0 kernel/exit.c:1260
Code: 74 04 00 00 48 89 c8 48 89 4c 24 08 48 c1 e8 03 42 0f b6 14 20 48 89 c8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 2d 1a 00 00 <44> 8b a5 74 04 00 00 bf 10 00 00 00 44 89 e6 e8 3f e1 2d 00 41 83
RSP: 0018:ffffc90006f2fc40 EFLAGS: 00010246
RAX: 0000000000000007 RBX: 0000000000000000 RCX: ffffffffffffff6c
RDX: 0000000000000000 RSI: ffffffff81454e90 RDI: ffffc90006f2fe40
RBP: fffffffffffffaf8 R08: ffff888057f56600 R09: fffffbfff1301219
R10: ffffffff898090c3 R11: fffffbfff1301218 R12: dffffc0000000000
R13: fffffffffffffaf8 R14: 0000000000000000 R15: ffffc90006f2fe40
FS:  0000000000000000(0000) GS:ffff8880ae700000(0063) knlGS:00000000090ab900
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: ffffffffffffff6c CR3: 0000000057eba000 CR4: 00000000001426e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400