BUG: unable to handle page fault for address: fffffffffffffc4c
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 9a90067 P4D 9a90067 PUD 9a92067 PMD 0 
Oops: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 6585 Comm: syz-executor.0 Not tainted 5.9.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:mm_update_next_owner+0x447/0x7a0 kernel/exit.c:387
Code: d5 2d 00 48 8d bd 4c fc ff ff 48 89 f8 48 c1 e8 03 0f b6 14 18 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 b5 02 00 00 <44> 8b b5 4c fc ff ff 31 ff 41 81 e6 00 00 20 00 44 89 f6 e8 11 d2
RSP: 0018:ffffc9001705fd38 EFLAGS: 00010246
RAX: 0000000000000007 RBX: dffffc0000000000 RCX: ffffffff814677ef
RDX: 0000000000000000 RSI: ffffffff814677b0 RDI: fffffffffffffc4c
RBP: 0000000000000000 R08: 0000000000000001 R09: ffffffff89a09083
R10: 0000000000000000 R11: 0000000000000000 R12: ffff888050cab100
R13: fffffffffffffc28 R14: ffff888032e81180 R15: ffff888032556c50
FS:  0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: fffffffffffffc4c CR3: 000000000f689000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 exit_mm kernel/exit.c:482 [inline]
 do_exit+0xa83/0x29f0 kernel/exit.c:793
 do_group_exit+0x125/0x310 kernel/exit.c:903
 __do_sys_exit_group kernel/exit.c:914 [inline]
 __se_sys_exit_group kernel/exit.c:912 [inline]
 __ia32_sys_exit_group+0x3a/0x50 kernel/exit.c:912
 do_syscall_32_irqs_on arch/x86/entry/common.c:78 [inline]
 __do_fast_syscall_32+0x60/0x90 arch/x86/entry/common.c:137
 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:160
 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c
RIP: 0023:0xf7f11549
Code: Bad RIP value.
RSP: 002b:00000000090afd7c EFLAGS: 00000202 ORIG_RAX: 00000000000000fc
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 000000000805b7db
RBP: 00000000fffffff7 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Modules linked in:
CR2: fffffffffffffc4c
---[ end trace 96b423d17c55d7a8 ]---
RIP: 0010:mm_update_next_owner+0x447/0x7a0 kernel/exit.c:387
Code: d5 2d 00 48 8d bd 4c fc ff ff 48 89 f8 48 c1 e8 03 0f b6 14 18 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 b5 02 00 00 <44> 8b b5 4c fc ff ff 31 ff 41 81 e6 00 00 20 00 44 89 f6 e8 11 d2
RSP: 0018:ffffc9001705fd38 EFLAGS: 00010246
RAX: 0000000000000007 RBX: dffffc0000000000 RCX: ffffffff814677ef
RDX: 0000000000000000 RSI: ffffffff814677b0 RDI: fffffffffffffc4c
RBP: 0000000000000000 R08: 0000000000000001 R09: ffffffff89a09083
R10: 0000000000000000 R11: 0000000000000000 R12: ffff888050cab100
R13: fffffffffffffc28 R14: ffff888032e81180 R15: ffff888032556c50
FS:  0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: fffffffffffffc4c CR3: 000000000f689000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400