INFO: task syz.1.1759:13796 blocked for more than 143 seconds.
Not tainted 6.12.0-syzkaller-08446-g228a1157fb9f #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.1759 state:D stack:27248 pid:13796 tgid:13795 ppid:5847 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5369 [inline]
__schedule+0xe58/0x5ad0 kernel/sched/core.c:6756
__schedule_loop kernel/sched/core.c:6833 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6848
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6905
__mutex_lock_common kernel/locking/mutex.c:665 [inline]
__mutex_lock+0x62b/0xa60 kernel/locking/mutex.c:735
nfsd_nl_version_get_doit+0x183/0x780 fs/nfsd/nfsctl.c:1890
genl_family_rcv_msg_doit+0x202/0x2f0 net/netlink/genetlink.c:1115
genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline]
genl_rcv_msg+0x565/0x800 net/netlink/genetlink.c:1210
netlink_rcv_skb+0x165/0x410 net/netlink/af_netlink.c:2541
genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219
netlink_unicast_kernel net/netlink/af_netlink.c:1321 [inline]
netlink_unicast+0x53c/0x7f0 net/netlink/af_netlink.c:1347
netlink_sendmsg+0x8b8/0xd70 net/netlink/af_netlink.c:1891
sock_sendmsg_nosec net/socket.c:711 [inline]
__sock_sendmsg net/socket.c:726 [inline]
____sys_sendmsg+0x9ae/0xb40 net/socket.c:2583
___sys_sendmsg+0x135/0x1e0 net/socket.c:2637
__sys_sendmsg+0x16e/0x220 net/socket.c:2669
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f148c17e819
RSP: 002b:00007f148cf41038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f148c335fa0 RCX: 00007f148c17e819
RDX: 0000000000004000 RSI: 00000000200020c0 RDI: 0000000000000004
RBP: 00007f148c1f175e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f148c335fa0 R15: 00007ffc7b3f8298
INFO: task syz.2.1779:14043 blocked for more than 144 seconds.
Not tainted 6.12.0-syzkaller-08446-g228a1157fb9f #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.1779 state:D stack:28064 pid:14043 tgid:14042 ppid:5844 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5369 [inline]
__schedule+0xe58/0x5ad0 kernel/sched/core.c:6756
__schedule_loop kernel/sched/core.c:6833 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6848
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6905
__mutex_lock_common kernel/locking/mutex.c:665 [inline]
__mutex_lock+0x62b/0xa60 kernel/locking/mutex.c:735
nfsd_shutdown_threads+0x5b/0xf0 fs/nfsd/nfssvc.c:625
nfsd_umount+0x48/0xe0 fs/nfsd/nfsctl.c:1428
deactivate_locked_super+0xbe/0x1a0 fs/super.c:473
deactivate_super+0xde/0x100 fs/super.c:506
cleanup_mnt+0x222/0x450 fs/namespace.c:1373
task_work_run+0x14e/0x250 kernel/task_work.c:239
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x27b/0x2a0 kernel/entry/common.c:218
do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f722e57e819
RSP: 002b:00007f722f361038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffea RBX: 00007f722e735fa0 RCX: 00007f722e57e819
RDX: 00000000200001c0 RSI: 00000000200000c0 RDI: 0000000000000000
RBP: 00007f722e5f175e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f722e735fa0 R15: 00007ffcff3b6c88
Showing all locks held in the system:
4 locks held by kworker/1:0/25:
#0: ffff88801ac80948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x126b/0x1b30 kernel/workqueue.c:3204
#1: ffffc900001f7d80 (free_ipc_work){+.+.}-{0:0}, at: process_one_work+0x8bb/0x1b30 kernel/workqueue.c:3205
#2: ffff8880b873eb18 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x29/0x130 kernel/sched/core.c:598
#3: ffff8880b8728a88 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x2c1/0x8e0 kernel/sched/psi.c:987
1 lock held by khungtaskd/30:
#0: ffffffff8ddbaf80 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8ddbaf80 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8ddbaf80 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x7f/0x390 kernel/locking/lockdep.c:6744
2 locks held by getty/5604:
#0: ffff8880359220a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc900032f32f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0xfba/0x1480 drivers/tty/n_tty.c:2211
2 locks held by kworker/u8:16/6137:
2 locks held by kworker/u8:57/8912:
#0: ffff8880b863eb18 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x29/0x130 kernel/sched/core.c:598
#1: ffff8880b8628a88 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x2c1/0x8e0 kernel/sched/psi.c:987
2 locks held by syz.4.1753/13764:
#0: ffffffff8fb5cd90 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1218
#1: ffffffff8e1ba208 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_nl_threads_set_doit+0x694/0xbe0 fs/nfsd/nfsctl.c:1671
2 locks held by syz.1.1759/13796:
#0: ffffffff8fb5cd90 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1218
#1: ffffffff8e1ba208 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_nl_version_get_doit+0x183/0x780 fs/nfsd/nfsctl.c:1890
2 locks held by syz.2.1779/14043:
#0: ffff888032df40e0 (&type->s_umount_key#48){++++}-{4:4}, at: __super_lock fs/super.c:56 [inline]
#0: ffff888032df40e0 (&type->s_umount_key#48){++++}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff888032df40e0 (&type->s_umount_key#48){++++}-{4:4}, at: deactivate_super+0xd6/0x100 fs/super.c:505
#1: ffffffff8e1ba208 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_shutdown_threads+0x5b/0xf0 fs/nfsd/nfssvc.c:625
1 lock held by syz.2.1779/14046:
#0: ffff888032df40e0 (&type->s_umount_key#48){++++}-{4:4}, at: __super_lock fs/super.c:56 [inline]
#0: ffff888032df40e0 (&type->s_umount_key#48){++++}-{4:4}, at: super_lock+0x176/0x3f0 fs/super.c:120
2 locks held by syz-executor/14166:
#0: ffff88806ed100e0 (&type->s_umount_key#48){++++}-{4:4}, at: __super_lock fs/super.c:56 [inline]
#0: ffff88806ed100e0 (&type->s_umount_key#48){++++}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff88806ed100e0 (&type->s_umount_key#48){++++}-{4:4}, at: deactivate_super+0xd6/0x100 fs/super.c:505
#1: ffffffff8e1ba208 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_shutdown_threads+0x5b/0xf0 fs/nfsd/nfssvc.c:625
2 locks held by syz-executor/14189:
#0: ffff888034bf40e0 (&type->s_umount_key#48){++++}-{4:4}, at: __super_lock fs/super.c:56 [inline]
#0: ffff888034bf40e0 (&type->s_umount_key#48){++++}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff888034bf40e0 (&type->s_umount_key#48){++++}-{4:4}, at: deactivate_super+0xd6/0x100 fs/super.c:505
#1: ffffffff8e1ba208 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_shutdown_threads+0x5b/0xf0 fs/nfsd/nfssvc.c:625
2 locks held by syz-executor/14256:
#0: ffff888063a100e0 (&type->s_umount_key#48){++++}-{4:4}, at: __super_lock fs/super.c:56 [inline]
#0: ffff888063a100e0 (&type->s_umount_key#48){++++}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff888063a100e0 (&type->s_umount_key#48){++++}-{4:4}, at: deactivate_super+0xd6/0x100 fs/super.c:505
#1: ffffffff8e1ba208 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_shutdown_threads+0x5b/0xf0 fs/nfsd/nfssvc.c:625
2 locks held by syz.0.1813/14284:
#0: ffff888061dca0e0 (&type->s_umount_key#48){++++}-{4:4}, at: __super_lock fs/super.c:56 [inline]
#0: ffff888061dca0e0 (&type->s_umount_key#48){++++}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff888061dca0e0 (&type->s_umount_key#48){++++}-{4:4}, at: deactivate_super+0xd6/0x100 fs/super.c:505
#1: ffffffff8e1ba208 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_shutdown_threads+0x5b/0xf0 fs/nfsd/nfssvc.c:625
2 locks held by syz-executor/14486:
#0: ffff8880b1ada0e0 (&type->s_umount_key#48){++++}-{4:4}, at: __super_lock fs/super.c:56 [inline]
#0: ffff8880b1ada0e0 (&type->s_umount_key#48){++++}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff8880b1ada0e0 (&type->s_umount_key#48){++++}-{4:4}, at: deactivate_super+0xd6/0x100 fs/super.c:505
#1: ffffffff8e1ba208 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_shutdown_threads+0x5b/0xf0 fs/nfsd/nfssvc.c:625
2 locks held by syz-executor/14501:
#0: ffff8880a9dc80e0 (&type->s_umount_key#48){++++}-{4:4}, at: __super_lock fs/super.c:56 [inline]
#0: ffff8880a9dc80e0 (&type->s_umount_key#48){++++}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff8880a9dc80e0 (&type->s_umount_key#48){++++}-{4:4}, at: deactivate_super+0xd6/0x100 fs/super.c:505
#1: ffffffff8e1ba208 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_shutdown_threads+0x5b/0xf0 fs/nfsd/nfssvc.c:625
2 locks held by syz.8.1882/14690:
#0: ffff8880a5b340e0 (&type->s_umount_key#48){++++}-{4:4}, at: __super_lock fs/super.c:56 [inline]
#0: ffff8880a5b340e0 (&type->s_umount_key#48){++++}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff8880a5b340e0 (&type->s_umount_key#48){++++}-{4:4}, at: deactivate_super+0xd6/0x100 fs/super.c:505
#1: ffffffff8e1ba208 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_shutdown_threads+0x5b/0xf0 fs/nfsd/nfssvc.c:625
2 locks held by syz-executor/14809:
#0: ffff8880a43220e0 (&type->s_umount_key#48){++++}-{4:4}, at: __super_lock fs/super.c:56 [inline]
#0: ffff8880a43220e0 (&type->s_umount_key#48){++++}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff8880a43220e0 (&type->s_umount_key#48){++++}-{4:4}, at: deactivate_super+0xd6/0x100 fs/super.c:505
#1: ffffffff8e1ba208 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_shutdown_threads+0x5b/0xf0 fs/nfsd/nfssvc.c:625
2 locks held by syz-executor/15359:
#0: ffff88809590e0e0 (&type->s_umount_key#48){++++}-{4:4}, at: __super_lock fs/super.c:56 [inline]
#0: ffff88809590e0e0 (&type->s_umount_key#48){++++}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff88809590e0e0 (&type->s_umount_key#48){++++}-{4:4}, at: deactivate_super+0xd6/0x100 fs/super.c:505
#1: ffffffff8e1ba208 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_shutdown_threads+0x5b/0xf0 fs/nfsd/nfssvc.c:625
4 locks held by syz-executor/15486:
#0: ffff888096338d80 (&hdev->req_lock){+.+.}-{4:4}, at: hci_dev_do_close+0x26/0x90 net/bluetooth/hci_core.c:481
#1: ffff888096338078 (&hdev->lock){+.+.}-{4:4}, at: hci_dev_close_sync+0x34c/0x1250 net/bluetooth/hci_sync.c:5200
#2: ffffffff8fd24e68 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_disconn_cfm include/net/bluetooth/hci_core.h:2047 [inline]
#2: ffffffff8fd24e68 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_conn_hash_flush+0xbb/0x260 net/bluetooth/hci_conn.c:2698
#3: ffffffff8ddc68b8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock+0x1a4/0x3b0 kernel/rcu/tree_exp.h:329
2 locks held by syz-executor/15756:
#0: ffff88809596e0e0 (&type->s_umount_key#48){++++}-{4:4}, at: __super_lock fs/super.c:56 [inline]
#0: ffff88809596e0e0 (&type->s_umount_key#48){++++}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff88809596e0e0 (&type->s_umount_key#48){++++}-{4:4}, at: deactivate_super+0xd6/0x100 fs/super.c:505
#1: ffffffff8e1ba208 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_shutdown_threads+0x5b/0xf0 fs/nfsd/nfssvc.c:625
2 locks held by syz-executor/15781:
#0: ffff88809cf6e0e0 (&type->s_umount_key#48){++++}-{4:4}, at: __super_lock fs/super.c:56 [inline]
#0: ffff88809cf6e0e0 (&type->s_umount_key#48){++++}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff88809cf6e0e0 (&type->s_umount_key#48){++++}-{4:4}, at: deactivate_super+0xd6/0x100 fs/super.c:505
#1: ffffffff8e1ba208 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_shutdown_threads+0x5b/0xf0 fs/nfsd/nfssvc.c:625
3 locks held by syz.7.2191/16441:
#0: ffff8880598f4d80 (&hdev->req_lock){+.+.}-{4:4}, at: hci_dev_do_close+0x26/0x90 net/bluetooth/hci_core.c:481
#1: ffff8880598f4078 (&hdev->lock){+.+.}-{4:4}, at: hci_dev_close_sync+0x34c/0x1250 net/bluetooth/hci_sync.c:5200
#2: ffffffff8fd24e68 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_disconn_cfm include/net/bluetooth/hci_core.h:2047 [inline]
#2: ffffffff8fd24e68 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_conn_hash_flush+0xbb/0x260 net/bluetooth/hci_conn.c:2698
3 locks held by syz.6.2223/16446:
#0: ffff888034c2cd80 (&hdev->req_lock){+.+.}-{4:4}, at: hci_dev_do_close+0x26/0x90 net/bluetooth/hci_core.c:481
#1: ffff888034c2c078 (&hdev->lock){+.+.}-{4:4}, at: hci_dev_close_sync+0x34c/0x1250 net/bluetooth/hci_sync.c:5200
#2: ffffffff8fd24e68 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_disconn_cfm include/net/bluetooth/hci_core.h:2047 [inline]
#2: ffffffff8fd24e68 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_conn_hash_flush+0xbb/0x260 net/bluetooth/hci_conn.c:2698
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-syzkaller-08446-g228a1157fb9f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
nmi_cpu_backtrace+0x27b/0x390 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x29c/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
watchdog+0xf0c/0x1240 kernel/hung_task.c:379
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 6138 Comm: kworker/u8:17 Not tainted 6.12.0-syzkaller-08446-g228a1157fb9f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: bat_events batadv_nc_worker
RIP: 0010:rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline]
RIP: 0010:rcu_is_watching+0xd/0xc0 kernel/rcu/tree.c:737
Code: 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 53 65 ff 05 bb 89 90 7e ee 78 a2 09 48 c7 c3 68 7f 03 00 83 f8 07 89 c5 0f 87 82 00 00
RSP: 0018:ffffc90004997af0 EFLAGS: 00000283
RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffffffff81698e6c
RDX: fffffbfff2039bf3 RSI: 0000000000000008 RDI: ffffffff901cdf90
RBP: 0000000000000000 R08: 0000000000000000 R09: fffffbfff2039bf2
R10: ffffffff901cdf97 R11: 0000000000000002 R12: 0000000000000000
R13: 000000000003d84c R14: 0000000000000000 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000000d4000 CR3: 000000000db7e000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
trace_lock_acquire+0x146/0x1e0 include/trace/events/lock.h:24
lock_acquire+0x2f/0xb0 kernel/locking/lockdep.c:5820
rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
rcu_read_lock include/linux/rcupdate.h:849 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:408 [inline]
batadv_nc_worker+0x16a/0x1060 net/batman-adv/network-coding.c:719
process_one_work+0x958/0x1b30 kernel/workqueue.c:3229
process_scheduled_works kernel/workqueue.c:3310 [inline]
worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244