BUG: unable to handle page fault for address: ffffe8ff1465ffff
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 1a43f067 P4D 1a43f067 PUD 1e20b067 PMD 1e20c067 PTE 0
Oops: Oops: 0000 [#1] SMP KASAN PTI
CPU: 1 UID: 0 PID: 5851 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:rcu_segcblist_advance+0x78/0x3e0
Code: 03 42 80 7c 25 00 00 74 08 4c 89 ff e8 81 dc 7a 00 4d 8b 37 4c 89 f0 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 f7 e8 68 dc 7a 00 <49> 83 3e 00 0f 84 1e 03 00 00 4c 8d 73 30 4c 89 f0 48 c1 e8 03 48
RSP: 0018:ffffc9000355f918 EFLAGS: 00010046
RAX: 1ffffd1fe28cbfff RBX: ffffe8ff14650cc0 RCX: 25bed42aa233bf00
RDX: 0000000000000001 RSI: fffffffffffffe70 RDI: ffffe8ff14650cc0
RBP: 1ffffd1fe28ca199 R08: 0000000000000000 R09: ffffffff81a5f8fd
R10: dffffc0000000000 R11: fffff520006abf20 R12: dffffc0000000000
R13: fffffffffffffe70 R14: ffffe8ff1465ffff R15: ffffe8ff14650cc8
FS:  0000555574258500(0000) GS:ffff8881a3c18000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffe8ff1465ffff CR3: 0000000109604000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 srcu_gp_start_if_needed+0x6e9/0x11d0
 __synchronize_srcu+0x306/0x3a0
 bch2_fs_btree_iter_exit+0x3f9/0x490
 bch2_fs_release+0x2ab/0x830
 kobject_put+0x22b/0x480
 deactivate_locked_super+0xbc/0x130
 cleanup_mnt+0x425/0x4c0
 task_work_run+0x1d4/0x260
 exit_to_user_mode_loop+0xec/0x110
 do_syscall_64+0x2bd/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fcac4b8ff17
Code: a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 a8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffd4fe6ff58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007fcac4c11c05 RCX: 00007fcac4b8ff17
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffd4fe70010
RBP: 00007ffd4fe70010 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffd4fe710a0
R13: 00007fcac4c11c05 R14: 0000000000016e28 R15: 00007ffd4fe710e0
 </TASK>
Modules linked in:
CR2: ffffe8ff1465ffff
---[ end trace 0000000000000000 ]---
RIP: 0010:rcu_segcblist_advance+0x78/0x3e0
Code: 03 42 80 7c 25 00 00 74 08 4c 89 ff e8 81 dc 7a 00 4d 8b 37 4c 89 f0 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 f7 e8 68 dc 7a 00 <49> 83 3e 00 0f 84 1e 03 00 00 4c 8d 73 30 4c 89 f0 48 c1 e8 03 48
RSP: 0018:ffffc9000355f918 EFLAGS: 00010046
RAX: 1ffffd1fe28cbfff RBX: ffffe8ff14650cc0 RCX: 25bed42aa233bf00
RDX: 0000000000000001 RSI: fffffffffffffe70 RDI: ffffe8ff14650cc0
RBP: 1ffffd1fe28ca199 R08: 0000000000000000 R09: ffffffff81a5f8fd
R10: dffffc0000000000 R11: fffff520006abf20 R12: dffffc0000000000
R13: fffffffffffffe70 R14: ffffe8ff1465ffff R15: ffffe8ff14650cc8
FS:  0000555574258500(0000) GS:ffff8881a3c18000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffe8ff1465ffff CR3: 0000000109604000 CR4: 00000000000006f0
