INFO: task syz-executor.1:9898 blocked for more than 143 seconds.
      Not tainted 6.8.0-rc2-next-20240202-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1  state:D stack:25584 pid:9898  tgid:9895  ppid:5109   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5400 [inline]
 __schedule+0x17df/0x4a40 kernel/sched/core.c:6727
 __schedule_loop kernel/sched/core.c:6804 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6819
 schedule_timeout+0xb0/0x310 kernel/time/timer.c:2159
 do_wait_for_common kernel/sched/completion.c:95 [inline]
 __wait_for_common kernel/sched/completion.c:116 [inline]
 wait_for_common kernel/sched/completion.c:127 [inline]
 wait_for_completion+0x355/0x620 kernel/sched/completion.c:148
 __flush_workqueue+0x730/0x1630 kernel/workqueue.c:3617
 ceph_monc_stop+0x7c/0x1e0 net/ceph/mon_client.c:1248
 ceph_destroy_client+0x74/0x130 net/ceph/ceph_common.c:768
 destroy_fs_client+0x192/0x270 fs/ceph/super.c:899
 deactivate_locked_super+0xc4/0x130 fs/super.c:477
 ceph_get_tree+0x9a9/0x17b0 fs/ceph/super.c:1361
 vfs_get_tree+0x90/0x2a0 fs/super.c:1784
 vfs_cmd_create+0xe4/0x230 fs/fsopen.c:230
 __do_sys_fsconfig fs/fsopen.c:476 [inline]
 __se_sys_fsconfig+0x967/0xec0 fs/fsopen.c:349
 do_syscall_64+0xfb/0x240
 entry_SYSCALL_64_after_hwframe+0x6d/0x75
RIP: 0033:0x7f799cc7dda9
RSP: 002b:00007f799da080c8 EFLAGS: 00000246 ORIG_RAX: 00000000000001af
RAX: ffffffffffffffda RBX: 00007f799cdabf80 RCX: 00007f799cc7dda9
RDX: 0000000000000000 RSI: 0000000000000006 RDI: 0000000000000003
RBP: 00007f799ccca47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f799cdabf80 R15: 00007ffd44763a28
 </TASK>
INFO: task syz-executor.3:9907 blocked for more than 144 seconds.
      Not tainted 6.8.0-rc2-next-20240202-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3  state:D stack:26776 pid:9907  tgid:9905  ppid:8613   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5400 [inline]
 __schedule+0x17df/0x4a40 kernel/sched/core.c:6727
 __schedule_loop kernel/sched/core.c:6804 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6819
 schedule_timeout+0xb0/0x310 kernel/time/timer.c:2159
 do_wait_for_common kernel/sched/completion.c:95 [inline]
 __wait_for_common kernel/sched/completion.c:116 [inline]
 wait_for_common kernel/sched/completion.c:127 [inline]
 wait_for_completion+0x355/0x620 kernel/sched/completion.c:148
 __flush_workqueue+0x730/0x1630 kernel/workqueue.c:3617
 ceph_mdsc_pre_umount+0x5b5/0x8b0 fs/ceph/mds_client.c:5475
 ceph_kill_sb+0x9f/0x4b0 fs/ceph/super.c:1535
 deactivate_locked_super+0xc4/0x130 fs/super.c:477
 ceph_get_tree+0x9a9/0x17b0 fs/ceph/super.c:1361
 vfs_get_tree+0x90/0x2a0 fs/super.c:1784
 vfs_cmd_create+0xe4/0x230 fs/fsopen.c:230
 __do_sys_fsconfig fs/fsopen.c:476 [inline]
 __se_sys_fsconfig+0x967/0xec0 fs/fsopen.c:349
 do_syscall_64+0xfb/0x240
 entry_SYSCALL_64_after_hwframe+0x6d/0x75
RIP: 0033:0x7ff4c227dda9
RSP: 002b:00007ff4c2f150c8 EFLAGS: 00000246 ORIG_RAX: 00000000000001af
RAX: ffffffffffffffda RBX: 00007ff4c23abf80 RCX: 00007ff4c227dda9
RDX: 0000000000000000 RSI: 0000000000000006 RDI: 0000000000000003
RBP: 00007ff4c22ca47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007ff4c23abf80 R15: 00007ffe674a8b18
 </TASK>
INFO: task syz-executor.0:9914 blocked for more than 145 seconds.
      Not tainted 6.8.0-rc2-next-20240202-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0  state:D stack:26776 pid:9914  tgid:9913  ppid:5102   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5400 [inline]
 __schedule+0x17df/0x4a40 kernel/sched/core.c:6727
 __schedule_loop kernel/sched/core.c:6804 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6819
 schedule_timeout+0xb0/0x310 kernel/time/timer.c:2159
 do_wait_for_common kernel/sched/completion.c:95 [inline]
 __wait_for_common kernel/sched/completion.c:116 [inline]
 wait_for_common kernel/sched/completion.c:127 [inline]
 wait_for_completion+0x355/0x620 kernel/sched/completion.c:148
 __flush_workqueue+0x730/0x1630 kernel/workqueue.c:3617
 ceph_mdsc_pre_umount+0x5b5/0x8b0 fs/ceph/mds_client.c:5475
 ceph_kill_sb+0x9f/0x4b0 fs/ceph/super.c:1535
 deactivate_locked_super+0xc4/0x130 fs/super.c:477
 ceph_get_tree+0x9a9/0x17b0 fs/ceph/super.c:1361
 vfs_get_tree+0x90/0x2a0 fs/super.c:1784
 vfs_cmd_create+0xe4/0x230 fs/fsopen.c:230
 __do_sys_fsconfig fs/fsopen.c:476 [inline]
 __se_sys_fsconfig+0x967/0xec0 fs/fsopen.c:349
 do_syscall_64+0xfb/0x240
 entry_SYSCALL_64_after_hwframe+0x6d/0x75
RIP: 0033:0x7fd57327dda9
RSP: 002b:00007fd5740390c8 EFLAGS: 00000246 ORIG_RAX: 00000000000001af
RAX: ffffffffffffffda RBX: 00007fd5733abf80 RCX: 00007fd57327dda9
RDX: 0000000000000000 RSI: 0000000000000006 RDI: 0000000000000003
RBP: 00007fd5732ca47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fd5733abf80 R15: 00007fff35b0c808
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/29:
 #0: ffffffff8e130d60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
 #0: ffffffff8e130d60 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline]
 #0: ffffffff8e130d60 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614
3 locks held by kworker/u4:3/50:
3 locks held by kworker/1:2/1787:
2 locks held by getty/4823:
 #0: ffff88802ec020a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
 #1: ffffc900031332f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b5/0x1e10 drivers/tty/n_tty.c:2201
1 lock held by syz-executor.2/9513:
 #0: ffff8880b942b818 (hrtimer_bases.lock){-.-.}-{2:2}, at: lock_hrtimer_base kernel/time/hrtimer.c:174 [inline]
 #0: ffff8880b942b818 (hrtimer_bases.lock){-.-.}-{2:2}, at: hrtimer_start_range_ns+0xdf/0xc60 kernel/time/hrtimer.c:1300
2 locks held by syz-executor.4/9696:
1 lock held by syz-executor.1/9898:
 #0: ffff88804e275070 (&fc->uapi_mutex){+.+.}-{3:3}, at: __do_sys_fsconfig fs/fsopen.c:474 [inline]
 #0: ffff88804e275070 (&fc->uapi_mutex){+.+.}-{3:3}, at: __se_sys_fsconfig+0x8e6/0xec0 fs/fsopen.c:349
2 locks held by syz-executor.3/9907:
 #0: ffff88804ec29870 (&fc->uapi_mutex){+.+.}-{3:3}, at: __do_sys_fsconfig fs/fsopen.c:474 [inline]
 #0: ffff88804ec29870 (&fc->uapi_mutex){+.+.}-{3:3}, at: __se_sys_fsconfig+0x8e6/0xec0 fs/fsopen.c:349
 #1: ffff88802370e0e0 (&type->s_umount_key#60/1){+.+.}-{3:3}, at: alloc_super+0x20e/0x8f0 fs/super.c:345
2 locks held by syz-executor.0/9914:
 #0: ffff88804dced470 (&fc->uapi_mutex){+.+.}-{3:3}, at: __do_sys_fsconfig fs/fsopen.c:474 [inline]
 #0: ffff88804dced470 (&fc->uapi_mutex){+.+.}-{3:3}, at: __se_sys_fsconfig+0x8e6/0xec0 fs/fsopen.c:349
 #1: ffff88802bea20e0 (&type->s_umount_key#60/1){+.+.}-{3:3}, at: alloc_super+0x20e/0x8f0 fs/super.c:345
2 locks held by syz-executor.3/10456:
 #0: ffff888054d89c70 (&fc->uapi_mutex){+.+.}-{3:3}, at: __do_sys_fsconfig fs/fsopen.c:474 [inline]
 #0: ffff888054d89c70 (&fc->uapi_mutex){+.+.}-{3:3}, at: __se_sys_fsconfig+0x8e6/0xec0 fs/fsopen.c:349
 #1: ffff888042baa0e0 (&type->s_umount_key#60/1){+.+.}-{3:3}, at: alloc_super+0x20e/0x8f0 fs/super.c:345
2 locks held by syz-executor.1/10486:
 #0: ffff88804f2a0870 (&fc->uapi_mutex){+.+.}-{3:3}, at: __do_sys_fsconfig fs/fsopen.c:474 [inline]
 #0: ffff88804f2a0870 (&fc->uapi_mutex){+.+.}-{3:3}, at: __se_sys_fsconfig+0x8e6/0xec0 fs/fsopen.c:349
 #1: ffff8880313fa0e0 (&type->s_umount_key#60/1){+.+.}-{3:3}, at: alloc_super+0x20e/0x8f0 fs/super.c:345
2 locks held by syz-executor.0/10501:
 #0: ffff888021a56070 (&fc->uapi_mutex){+.+.}-{3:3}, at: __do_sys_fsconfig fs/fsopen.c:474 [inline]
 #0: ffff888021a56070 (&fc->uapi_mutex){+.+.}-{3:3}, at: __se_sys_fsconfig+0x8e6/0xec0 fs/fsopen.c:349
 #1: ffff88801f8ba0e0 (&type->s_umount_key#60/1){+.+.}-{3:3}, at: alloc_super+0x20e/0x8f0 fs/super.c:345
1 lock held by syz-executor.3/10562:
 #0: ffffffff8e1360f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:291 [inline]
 #0: ffffffff8e1360f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x39a/0x820 kernel/rcu/tree_exp.h:939
1 lock held by syz-executor.0/10650:
 #0: ffffffff8e1360f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:323 [inline]
 #0: ffffffff8e1360f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x463/0x820 kernel/rcu/tree_exp.h:939
2 locks held by syz-executor.1/10911:
 #0: ffff88804b407470 (&fc->uapi_mutex){+.+.}-{3:3}, at: __do_sys_fsconfig fs/fsopen.c:474 [inline]
 #0: ffff88804b407470 (&fc->uapi_mutex){+.+.}-{3:3}, at: __se_sys_fsconfig+0x8e6/0xec0 fs/fsopen.c:349
 #1: ffff88803292e0e0 (&type->s_umount_key#60/1){+.+.}-{3:3}, at: alloc_super+0x20e/0x8f0 fs/super.c:345
1 lock held by syz-executor.1/11067:
 #0: ffffffff8f379fc8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
 #0: ffffffff8f379fc8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x82c/0x1040 net/core/rtnetlink.c:6612
2 locks held by syz-executor.4/11100:

=============================================

NMI backtrace for cpu 0
CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.8.0-rc2-next-20240202-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e7/0x2e0 lib/dump_stack.c:106
 nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
 watchdog+0xfb0/0xff0 kernel/hung_task.c:379
 kthread+0x2f0/0x390 kernel/kthread.c:388
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:242
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 11067 Comm: syz-executor.1 Not tainted 6.8.0-rc2-next-20240202-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
RIP: 0010:check_kcov_mode kernel/kcov.c:173 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:236 [inline]
RIP: 0010:__sanitizer_cov_trace_cmp4+0x18/0x90 kernel/kcov.c:278
Code: 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 4c 8b 04 24 65 48 8b 14 25 00 bd 03 00 65 8b 05 b0 ea 6f 7e <a9> 00 01 ff 00 74 10 a9 00 01 00 00 74 5b 83 ba 14 16 00 00 00 74
RSP: 0018:ffffc90003d9ec38 EFLAGS: 00000202
RAX: 0000000080000000 RBX: 00000000000001a4 RCX: ffff88802a5a9e00
RDX: ffff88802a5a9e00 RSI: 00000000000001a4 RDI: 00000000000001a4
RBP: 00000000000001a4 R08: ffffffff82307beb R09: 00000000ffffffff
R10: dffffc0000000000 R11: fffffbfff1f0b6e6 R12: dffffc0000000000
R13: 0000000000000010 R14: 0000000000000000 R15: 00000000000003c0
FS:  0000555555b27480(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c001931000 CR3: 000000003dd7c000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 sysctl_check_table fs/proc/proc_sysctl.c:1147 [inline]
 __register_sysctl_table+0x7ab/0x1440 fs/proc/proc_sysctl.c:1367
 neigh_sysctl_register+0x416/0x500 net/core/neighbour.c:3859
 addrconf_sysctl_register+0xb2/0x1c0 net/ipv6/addrconf.c:7191
 ipv6_add_dev+0xd64/0x1290 net/ipv6/addrconf.c:453
 addrconf_notify+0x6a7/0x1020 net/ipv6/addrconf.c:3593
 notifier_call_chain+0x18f/0x3b0 kernel/notifier.c:93
 call_netdevice_notifiers_extack net/core/dev.c:2012 [inline]
 call_netdevice_notifiers net/core/dev.c:2026 [inline]
 register_netdevice+0x151f/0x19c0 net/core/dev.c:10302
 wg_newlink+0x485/0x720 drivers/net/wireguard/device.c:372
 rtnl_newlink_create net/core/rtnetlink.c:3515 [inline]
 __rtnl_newlink net/core/rtnetlink.c:3735 [inline]
 rtnl_newlink+0x158f/0x20a0 net/core/rtnetlink.c:3748
 rtnetlink_rcv_msg+0x885/0x1040 net/core/rtnetlink.c:6615
 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2543
 netlink_unicast_kernel net/netlink/af_netlink.c:1341 [inline]
 netlink_unicast+0x7ea/0x980 net/netlink/af_netlink.c:1367
 netlink_sendmsg+0xa3c/0xd70 net/netlink/af_netlink.c:1908
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg+0x221/0x270 net/socket.c:745
 __sys_sendto+0x3a4/0x4f0 net/socket.c:2191
 __do_sys_sendto net/socket.c:2203 [inline]
 __se_sys_sendto net/socket.c:2199 [inline]
 __x64_sys_sendto+0xde/0x100 net/socket.c:2199
 do_syscall_64+0xfb/0x240
 entry_SYSCALL_64_after_hwframe+0x6d/0x75
RIP: 0033:0x7f247f67fa9c
Code: 1a 51 02 00 44 8b 4c 24 2c 4c 8b 44 24 20 89 c5 44 8b 54 24 28 48 8b 54 24 18 b8 2c 00 00 00 48 8b 74 24 10 8b 7c 24 08 0f 05 <48> 3d 00 f0 ff ff 77 34 89 ef 48 89 44 24 08 e8 60 51 02 00 48 8b
RSP: 002b:00007fff4ddd1790 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f24802d4620 RCX: 00007f247f67fa9c
RDX: 000000000000003c RSI: 00007f24802d4670 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007fff4ddd17e4 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003
R13: 0000000000000000 R14: 00007f24802d4670 R15: 0000000000000000
 </TASK>