libceph: resolve '!27.½&0.0.1' (ret=-3): failed
------------[ cut here ]------------
kernel BUG at net/ceph/mon_client.c:211!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 7536 Comm: syz.3.401 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:pick_new_mon net/ceph/mon_client.c:211 [inline]
RIP: 0010:__open_session+0x60f/0x740 net/ceph/mon_client.c:245
Code: f6 44 89 e7 e8 22 18 25 fa 89 c5 e9 2b fb ff ff e8 b6 d3 79 f6 c7 83 b4 09 00 00 0a 00 00 00 e9 22 fc ff ff e8 a2 d3 79 f6 90 <0f> 0b e8 fa 1b ee f6 e9 7b fa ff ff 4c 89 f7 e8 ed 1b ee f6 e9 16
RSP: 0018:ffffc90004017be0 EFLAGS: 00010287
RAX: 00000000000063f3 RBX: ffff88805eb88290 RCX: ffffc9002482b000
RDX: 0000000000080000 RSI: ffffffff8b928fae RDI: ffff888037400000
RBP: ffff88803d8f8780 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000
R13: 00000000ffffffff R14: ffff88805eb88400 R15: ffff88805eb88298
FS:  00007fbfbd90a6c0(0000) GS:ffff8880d4940000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005555648184e8 CR3: 0000000028515000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 ceph_monc_open_session+0x46/0x60 net/ceph/mon_client.c:534
 __ceph_open_session+0x135/0x5f0 net/ceph/ceph_common.c:798
 ceph_real_mount fs/ceph/super.c:1173 [inline]
 ceph_get_tree+0xd98/0x1fd0 fs/ceph/super.c:1362
 vfs_get_tree+0x92/0x320 fs/super.c:1943
 vfs_cmd_create+0xd7/0x2a0 fs/fsopen.c:231
 vfs_fsconfig_locked fs/fsopen.c:295 [inline]
 __do_sys_fsconfig+0x55a/0xcb0 fs/fsopen.c:463
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x123/0x790 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fbfbc99e559
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fbfbd90a028 EFLAGS: 00000246 ORIG_RAX: 00000000000001af
RAX: ffffffffffffffda RBX: 00007fbfbcc25fa0 RCX: 00007fbfbc99e559
RDX: 0000000000000000 RSI: 0000000000000006 RDI: 0000000000000009
RBP: 00007fbfbca35b20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fbfbcc26038 R14: 00007fbfbcc25fa0 R15: 00007ffe421452b8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:pick_new_mon net/ceph/mon_client.c:211 [inline]
RIP: 0010:__open_session+0x60f/0x740 net/ceph/mon_client.c:245
Code: f6 44 89 e7 e8 22 18 25 fa 89 c5 e9 2b fb ff ff e8 b6 d3 79 f6 c7 83 b4 09 00 00 0a 00 00 00 e9 22 fc ff ff e8 a2 d3 79 f6 90 <0f> 0b e8 fa 1b ee f6 e9 7b fa ff ff 4c 89 f7 e8 ed 1b ee f6 e9 16
RSP: 0018:ffffc90004017be0 EFLAGS: 00010287
RAX: 00000000000063f3 RBX: ffff88805eb88290 RCX: ffffc9002482b000
RDX: 0000000000080000 RSI: ffffffff8b928fae RDI: ffff888037400000
RBP: ffff88803d8f8780 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000
R13: 00000000ffffffff R14: ffff88805eb88400 R15: ffff88805eb88298
FS:  00007fbfbd90a6c0(0000) GS:ffff8880d4940000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005555648184e8 CR3: 0000000028515000 CR4: 0000000000352ef0