cgroup: fork rejected by pids controller in /syz4
Oops: general protection fault, probably for non-canonical address 0xdffffc000000000b: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000058-0x000000000000005f]
CPU: 0 UID: 0 PID: 10780 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:klist_remove+0x14a/0x340
Code: 4d 89 f5 49 c1 ed 03 43 80 7c 3d 00 00 74 08 4c 89 f7 e8 99 33 b3 f6 4d 8b 26 49 83 e4 fe 49 8d 7c 24 58 48 89 f8 48 c1 e8 03 <42> 80 3c 38 00 74 05 e8 7a 33 b3 f6 49 8b 44 24 58 48 89 44 24 08
RSP: 0018:ffffc9000b93f820 EFLAGS: 00010202
RAX: 000000000000000b RBX: ffff88801b3b3980 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000058
RBP: ffffc9000b93f920 R08: ffffffff8f8a0943 R09: 1ffffffff1f14128
R10: dffffc0000000000 R11: fffffbfff1f14129 R12: 0000000000000000
R13: 1ffff11004fbe98c R14: ffff888027df4c60 R15: dffffc0000000000
FS:  00005555832f9500(0000) GS:ffff8880b8618000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6e15f25dc0 CR3: 000000003ed16000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 device_move+0x193/0x700
 hci_conn_del_sysfs+0xb8/0x170
 hci_conn_del+0xc33/0x11b0
 hci_conn_hash_flush+0x191/0x230
 hci_dev_close_sync+0xaef/0x1330
 hci_unregister_dev+0x21a/0x510
 vhci_release+0x80/0xd0
 __fput+0x44c/0xa70
 task_work_run+0x1d4/0x260
 do_exit+0x6b5/0x2300
 do_group_exit+0x21c/0x2d0
 __x64_sys_exit_group+0x3f/0x40
 x64_sys_call+0x21f7/0x2200
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f11e258ebe9
Code: Unable to access opcode bytes at 0x7f11e258ebbf.
RSP: 002b:00007ffd2b77c508 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f11e258ebe9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000043
RBP: 00007f11e261367e R08: 00007ffd2b77a2a6 R09: 00000000000927c0
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000000000b
R13: 00000000000927c0 R14: 0000000000032a42 R15: 00007ffd2b77c6c0
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:klist_remove+0x14a/0x340
Code: 4d 89 f5 49 c1 ed 03 43 80 7c 3d 00 00 74 08 4c 89 f7 e8 99 33 b3 f6 4d 8b 26 49 83 e4 fe 49 8d 7c 24 58 48 89 f8 48 c1 e8 03 <42> 80 3c 38 00 74 05 e8 7a 33 b3 f6 49 8b 44 24 58 48 89 44 24 08
RSP: 0018:ffffc9000b93f820 EFLAGS: 00010202
RAX: 000000000000000b RBX: ffff88801b3b3980 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000058
RBP: ffffc9000b93f920 R08: ffffffff8f8a0943 R09: 1ffffffff1f14128
R10: dffffc0000000000 R11: fffffbfff1f14129 R12: 0000000000000000
R13: 1ffff11004fbe98c R14: ffff888027df4c60 R15: dffffc0000000000
FS:  00005555832f9500(0000) GS:ffff8880b8618000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6e15f25dc0 CR3: 000000003ed16000 CR4: 00000000000006f0
