INFO: task syz.3.583:7960 blocked for more than 143 seconds.
Not tainted 6.12.0-rc1-syzkaller-00381-g2a130b7e1fcd #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.583 state:D stack:27248 pid:7960 tgid:7957 ppid:7775 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5315 [inline]
__schedule+0xef5/0x5750 kernel/sched/core.c:6675
__schedule_loop kernel/sched/core.c:6752 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6767
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6824
__mutex_lock_common kernel/locking/mutex.c:684 [inline]
__mutex_lock+0x5b8/0x9c0 kernel/locking/mutex.c:752
nfsd_nl_threads_set_doit+0x694/0xbe0 fs/nfsd/nfsctl.c:1671
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:2550
genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219
netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline]
netlink_unicast+0x53c/0x7f0 net/netlink/af_netlink.c:1357
netlink_sendmsg+0x8b8/0xd70 net/netlink/af_netlink.c:1901
sock_sendmsg_nosec net/socket.c:729 [inline]
__sock_sendmsg net/socket.c:744 [inline]
____sys_sendmsg+0x9ae/0xb40 net/socket.c:2602
___sys_sendmsg+0x135/0x1e0 net/socket.c:2656
__sys_sendmsg+0x117/0x1f0 net/socket.c:2685
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: 0033:0x7f47c697dff9
RSP: 002b:00007f47c772f038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f47c6b36058 RCX: 00007f47c697dff9
RDX: 0000000000008004 RSI: 0000000020000140 RDI: 0000000000000027
RBP: 00007f47c69f0296 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f47c6b36058 R15: 00007ffd3a92c9e8
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff8ddb7800 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8ddb7800 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8ddb7800 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x7f/0x390 kernel/locking/lockdep.c:6720
3 locks held by kworker/u8:3/52:
3 locks held by kworker/1:2/2632:
#0: ffff88801ac80948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x1212/0x1b30 kernel/workqueue.c:3204
#1: ffffc900096dfd80 ((fqdir_free_work).work){+.+.}-{0:0}, at: process_one_work+0x8bb/0x1b30 kernel/workqueue.c:3205
#2: ffffffff8ddc2fc0 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x48/0x700 kernel/rcu/tree.c:4562
2 locks held by getty/4993:
#0: ffff88802e2350a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc90002efe2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfba/0x1480 drivers/tty/n_tty.c:2211
2 locks held by syz.2.555/7812:
#0: ffffffff8fb61190 (cb_lock){++++}-{3:3}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1218
#1: ffffffff8e1d1868 (nfsd_mutex){+.+.}-{3:3}, at: nfsd_nl_threads_set_doit+0x694/0xbe0 fs/nfsd/nfsctl.c:1671
2 locks held by syz.3.583/7960:
#0: ffffffff8fb61190 (cb_lock){++++}-{3:3}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1218
#1: ffffffff8e1d1868 (nfsd_mutex){+.+.}-{3:3}, at: nfsd_nl_threads_set_doit+0x694/0xbe0 fs/nfsd/nfsctl.c:1671
2 locks held by syz-executor/7977:
#0: ffff88806f8e40e0 (&type->s_umount_key#49){+.+.}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff88806f8e40e0 (&type->s_umount_key#49){+.+.}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff88806f8e40e0 (&type->s_umount_key#49){+.+.}-{3:3}, at: deactivate_super+0xd6/0x100 fs/super.c:505
#1: ffffffff8e1d1868 (nfsd_mutex){+.+.}-{3:3}, at: nfsd_shutdown_threads+0x5b/0xf0 fs/nfsd/nfssvc.c:625
2 locks held by syz.0.627/8182:
#0: ffffffff8fb61190 (cb_lock){++++}-{3:3}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1218
#1: ffffffff8e1d1868 (nfsd_mutex){+.+.}-{3:3}, at: nfsd_nl_threads_set_doit+0x694/0xbe0 fs/nfsd/nfsctl.c:1671
2 locks held by syz-executor/8609:
#0: ffff88803d83c0e0 (&type->s_umount_key#49){+.+.}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff88803d83c0e0 (&type->s_umount_key#49){+.+.}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff88803d83c0e0 (&type->s_umount_key#49){+.+.}-{3:3}, at: deactivate_super+0xd6/0x100 fs/super.c:505
#1: ffffffff8e1d1868 (nfsd_mutex){+.+.}-{3:3}, at: nfsd_shutdown_threads+0x5b/0xf0 fs/nfsd/nfssvc.c:625
2 locks held by syz.3.736/8660:
#0: ffffffff8fb61190 (cb_lock){++++}-{3:3}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1218
#1: ffffffff8e1d1868 (nfsd_mutex){+.+.}-{3:3}, at: nfsd_nl_threads_set_doit+0x694/0xbe0 fs/nfsd/nfsctl.c:1671
2 locks held by syz-executor/8783:
#0: ffff88814c0cc0e0 (&type->s_umount_key#49){+.+.}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff88814c0cc0e0 (&type->s_umount_key#49){+.+.}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff88814c0cc0e0 (&type->s_umount_key#49){+.+.}-{3:3}, at: deactivate_super+0xd6/0x100 fs/super.c:505
#1: ffffffff8e1d1868 (nfsd_mutex){+.+.}-{3:3}, at: nfsd_shutdown_threads+0x5b/0xf0 fs/nfsd/nfssvc.c:625
2 locks held by syz-executor/9071:
#0: ffff8880606cc0e0 (&type->s_umount_key#49){+.+.}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff8880606cc0e0 (&type->s_umount_key#49){+.+.}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff8880606cc0e0 (&type->s_umount_key#49){+.+.}-{3:3}, at: deactivate_super+0xd6/0x100 fs/super.c:505
#1: ffffffff8e1d1868 (nfsd_mutex){+.+.}-{3:3}, at: nfsd_shutdown_threads+0x5b/0xf0 fs/nfsd/nfssvc.c:625
2 locks held by kworker/u8:23/9688:
2 locks held by syz.3.985/10104:
#0: ffff88807eb7e0e0 (&type->s_umount_key#49){+.+.}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff88807eb7e0e0 (&type->s_umount_key#49){+.+.}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff88807eb7e0e0 (&type->s_umount_key#49){+.+.}-{3:3}, at: deactivate_super+0xd6/0x100 fs/super.c:505
#1: ffffffff8e1d1868 (nfsd_mutex){+.+.}-{3:3}, at: nfsd_shutdown_threads+0x5b/0xf0 fs/nfsd/nfssvc.c:625
1 lock held by syz-executor/10188:
#0: ffffffff8ddc30f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock+0x282/0x3b0 kernel/rcu/tree_exp.h:297
1 lock held by syz-executor/10262:
#0: ffffffff8ddc30f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock+0x1a4/0x3b0 kernel/rcu/tree_exp.h:329
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-rc1-syzkaller-00381-g2a130b7e1fcd #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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 5534 Comm: kworker/u8:20 Not tainted 6.12.0-rc1-syzkaller-00381-g2a130b7e1fcd #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: bat_events batadv_nc_worker
RIP: 0010:mark_usage kernel/locking/lockdep.c:4610 [inline]
RIP: 0010:__lock_acquire+0x118a/0x3ce0 kernel/locking/lockdep.c:5156
Code: ff e8 ca 92 ff ff 48 c7 c7 00 db 4c 8b e8 6e b2 02 00 e8 99 ad 92 09 e8 04 c3 03 00 31 d2 e9 19 fc ff ff 65 8b 05 0e 85 98 7e <85> c0 0f 85 8e 02 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b 7c 24
RSP: 0018:ffffc90009b9f8d8 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffff88802dbbe552 RCX: 0000000000000000
RDX: 0000000000000002 RSI: 0000000000000004 RDI: ffff88802dbbe551
RBP: 0000000000000006 R08: 0000000000000000 R09: fffffbfff2d315a3
R10: ffffffff9698ad1f R11: 0000000000000000 R12: dffffc0000000000
R13: ffff88802dbbe530 R14: 0000000000000004 R15: ffff88802dbbda00
FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4f45441440 CR3: 000000000db7c000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_acquire.part.0+0x11b/0x380 kernel/locking/lockdep.c:5825
__raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline]
_raw_spin_lock_bh+0x33/0x40 kernel/locking/spinlock.c:178
spin_lock_bh include/linux/spinlock.h:356 [inline]
batadv_nc_purge_paths+0xca/0x390 net/batman-adv/network-coding.c:442
batadv_nc_worker+0x94a/0x1060 net/batman-adv/network-coding.c:722
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