BUG: unable to handle page fault for address: ffffffffffffff6c
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 9270067 P4D 9270067 PUD 9272067 PMD 0 
Oops: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 9105 Comm: syz-executor.1 Not tainted 5.5.0-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+0x58/0x3000 kernel/exit.c:1265
Code: 00 00 00 fc ff df e8 97 2f 2d 00 48 89 5d b8 48 81 c3 74 04 00 00 49 89 dd 49 c1 ed 03 43 8a 44 25 00 84 c0 0f 85 88 25 00 00 <44> 8b 23 bf 10 00 00 00 44 89 e6 e8 18 33 2d 00 41 83 fc 10 0f 84
RSP: 0018:ffffc900027c7ba0 EFLAGS: 00010246
RAX: ffffffff81498f00 RBX: ffffffffffffff6c RCX: ffff88806a272500
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffc900027c7db8
RBP: ffffc900027c7cf0 R08: ffffffff81496e9d R09: ffffffff81498fde
R10: ffff88806a272500 R11: 0000000000000002 R12: dffffc0000000000
R13: 1fffffffffffffed R14: ffffc900027c7db8 R15: 0000000000000000
FS:  0000000001c80940(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffff6c CR3: 000000006a24f000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 do_wait_thread kernel/exit.c:1374 [inline]
 do_wait+0x2c1/0x6e0 kernel/exit.c:1445
 kernel_wait4+0x1ea/0x2e0 kernel/exit.c:1617
 __do_sys_wait4 kernel/exit.c:1629 [inline]
 __se_sys_wait4 kernel/exit.c:1625 [inline]
 __x64_sys_wait4+0xc7/0x150 kernel/exit.c:1625
 do_syscall_64+0xf7/0x1c0 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4151da
Code: 0f 83 6a 18 00 00 c3 66 0f 1f 84 00 00 00 00 00 8b 05 9e 32 66 00 85 c0 75 36 45 31 d2 48 63 d2 48 63 ff b8 3d 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 06 c3 0f 1f 44 00 00 48 c7 c2 d4 ff ff ff f7
RSP: 002b:00007ffd031daa48 EFLAGS: 00000246 ORIG_RAX: 000000000000003d
RAX: ffffffffffffffda RBX: 00000000002d5b13 RCX: 00000000004151da
RDX: 0000000040000001 RSI: 00007ffd031daa80 RDI: ffffffffffffffff
RBP: 0000000000007866 R08: 0000000000000001 R09: 0000000001c80940
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffd031daa80 R14: 00000000002d5af0 R15: 00007ffd031daa90
Modules linked in:
CR2: ffffffffffffff6c
---[ end trace c163a26ca2be5144 ]---
RIP: 0010:__read_once_size include/linux/compiler.h:199 [inline]
RIP: 0010:wait_consider_task+0x58/0x3000 kernel/exit.c:1265
Code: 00 00 00 fc ff df e8 97 2f 2d 00 48 89 5d b8 48 81 c3 74 04 00 00 49 89 dd 49 c1 ed 03 43 8a 44 25 00 84 c0 0f 85 88 25 00 00 <44> 8b 23 bf 10 00 00 00 44 89 e6 e8 18 33 2d 00 41 83 fc 10 0f 84
RSP: 0018:ffffc900027c7ba0 EFLAGS: 00010246
RAX: ffffffff81498f00 RBX: ffffffffffffff6c RCX: ffff88806a272500
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffc900027c7db8
RBP: ffffc900027c7cf0 R08: ffffffff81496e9d R09: ffffffff81498fde
R10: ffff88806a272500 R11: 0000000000000002 R12: dffffc0000000000
R13: 1fffffffffffffed R14: ffffc900027c7db8 R15: 0000000000000000
FS:  0000000001c80940(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffff6c CR3: 000000006a24f000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400