------------[ cut here ]------------
kernel BUG at net/ceph/mon_client.c:211!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 1 UID: 0 PID: 14738 Comm: syz.4.679 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:pick_new_mon net/ceph/mon_client.c:211 [inline]
RIP: 0010:__open_session+0x799/0x940 net/ceph/mon_client.c:245
Code: ca fd ff ff 44 89 e1 80 e1 07 38 c1 0f 8c d0 fd ff ff be 04 00 00 00 4c 89 e7 e8 a2 13 1d f7 e9 be fd ff ff e8 f8 34 b0 f6 90 <0f> 0b 4d 89 ee 48 8b 04 24 42 0f b6 04 38 84 c0 0f 85 2f 01 00 00
RSP: 0018:ffffc90005adfae8 EFLAGS: 00010283
RAX: ffffffff8b172958 RBX: ffff88804f2a4308 RCX: 0000000000080000
RDX: ffffc90014828000 RSI: 0000000000002b5a RDI: 0000000000002b5b
RBP: 00000000ffffffff R08: ffff888026bd9f40 R09: 0000000000000002
R10: 0000000000000100 R11: 0000000000000001 R12: 0000000000000000
R13: ffff88804f2a4470 R14: ffff88804f2a4310 R15: dffffc0000000000
FS:  00007f29936366c0(0000) GS:ffff8881248ad000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffefdc73a6c CR3: 0000000066110000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 ceph_monc_open_session+0x56/0x1a0 net/ceph/mon_client.c:534
 __ceph_open_session+0x16d/0x640 net/ceph/ceph_common.c:798
 ceph_real_mount fs/ceph/super.c:1173 [inline]
 ceph_get_tree+0xafb/0x1a40 fs/ceph/super.c:1362
 vfs_get_tree+0x92/0x2a0 fs/super.c:1943
 vfs_cmd_create+0xa2/0x200 fs/fsopen.c:231
 __do_sys_fsconfig fs/fsopen.c:463 [inline]
 __se_sys_fsconfig+0x6bf/0x810 fs/fsopen.c:350
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f29953df559
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:00007f2993636028 EFLAGS: 00000246 ORIG_RAX: 00000000000001af
RAX: ffffffffffffffda RBX: 00007f2995665fa0 RCX: 00007f29953df559
RDX: 0000000000000000 RSI: 0000000000000006 RDI: 0000000000000006
RBP: 00007f2995476b20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2995666038 R14: 00007f2995665fa0 R15: 00007ffd67e681b8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:pick_new_mon net/ceph/mon_client.c:211 [inline]
RIP: 0010:__open_session+0x799/0x940 net/ceph/mon_client.c:245
Code: ca fd ff ff 44 89 e1 80 e1 07 38 c1 0f 8c d0 fd ff ff be 04 00 00 00 4c 89 e7 e8 a2 13 1d f7 e9 be fd ff ff e8 f8 34 b0 f6 90 <0f> 0b 4d 89 ee 48 8b 04 24 42 0f b6 04 38 84 c0 0f 85 2f 01 00 00
RSP: 0018:ffffc90005adfae8 EFLAGS: 00010283
RAX: ffffffff8b172958 RBX: ffff88804f2a4308 RCX: 0000000000080000
RDX: ffffc90014828000 RSI: 0000000000002b5a RDI: 0000000000002b5b
RBP: 00000000ffffffff R08: ffff888026bd9f40 R09: 0000000000000002
R10: 0000000000000100 R11: 0000000000000001 R12: 0000000000000000
R13: ffff88804f2a4470 R14: ffff88804f2a4310 R15: dffffc0000000000
FS:  00007f29936366c0(0000) GS:ffff8881248ad000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffefdc73a6c CR3: 0000000066110000 CR4: 00000000003526f0