INFO: task syz.6.1239:12586 blocked for more than 143 seconds.
Not tainted 6.12.0-syzkaller-00233-g9fb2cfa4635a #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.6.1239 state:D stack:26832 pid:12586 tgid:12585 ppid:11338 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0xe55/0x5740 kernel/sched/core.c:6693
__schedule_loop kernel/sched/core.c:6770 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6785
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6842
__mutex_lock_common kernel/locking/mutex.c:684 [inline]
__mutex_lock+0x5b8/0x9c0 kernel/locking/mutex.c:752
nfsd_nl_version_set_doit+0xc5/0x7a0 fs/nfsd/nfsctl.c:1813
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:2581
___sys_sendmsg+0x135/0x1e0 net/socket.c:2635
__sys_sendmsg+0x16e/0x220 net/socket.c:2667
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: 0033:0x7f5961d7e759
RSP: 002b:00007f5962bae038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f5961f35f80 RCX: 00007f5961d7e759
RDX: 0000000000004010 RSI: 00000000200004c0 RDI: 0000000000000004
RBP: 00007f5961df175e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f5961f35f80 R15: 00007ffd0d685bb8
INFO: task syz.0.1244:12606 blocked for more than 144 seconds.
Not tainted 6.12.0-syzkaller-00233-g9fb2cfa4635a #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.1244 state:D stack:28608 pid:12606 tgid:12605 ppid:11815 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0xe55/0x5740 kernel/sched/core.c:6693
__schedule_loop kernel/sched/core.c:6770 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6785
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6842
__mutex_lock_common kernel/locking/mutex.c:684 [inline]
__mutex_lock+0x5b8/0x9c0 kernel/locking/mutex.c:752
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:328 [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: 0033:0x7f5a4ab7e759
RSP: 002b:00007f5a4ba0e038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffea RBX: 00007f5a4ad35f80 RCX: 00007f5a4ab7e759
RDX: 0000000020000140 RSI: 0000000020000100 RDI: 0000000000000000
RBP: 00007f5a4abf175e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000010001 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f5a4ad35f80 R15: 00007ffe6020dac8
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff8ddb7980 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8ddb7980 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8ddb7980 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x7f/0x390 kernel/locking/lockdep.c:6720
2 locks held by kworker/u8:6/3600:
#0: ffff88801c78f148 ((wq_completion)iou_exit){+.+.}-{0:0}, at: process_one_work+0x1212/0x1b30 kernel/workqueue.c:3204
#1: ffffc9000cd87d80 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work+0x8bb/0x1b30 kernel/workqueue.c:3205
1 lock held by dhcpcd/5507:
2 locks held by getty/5597:
#0: ffff8880315fe0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfba/0x1480 drivers/tty/n_tty.c:2211
2 locks held by syz.6.1239/12586:
#0: ffffffff8fb66650 (cb_lock){++++}-{3:3}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1218
#1: ffffffff8e1d5ee8 (nfsd_mutex){+.+.}-{3:3}, at: nfsd_nl_version_set_doit+0xc5/0x7a0 fs/nfsd/nfsctl.c:1813
2 locks held by syz.2.1240/12590:
#0: ffffffff8fb66650 (cb_lock){++++}-{3:3}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1218
#1: ffffffff8e1d5ee8 (nfsd_mutex){+.+.}-{3:3}, at: nfsd_nl_threads_set_doit+0x694/0xbe0 fs/nfsd/nfsctl.c:1671
2 locks held by syz.0.1244/12606:
#0: ffff888078bac0e0 (&type->s_umount_key#52){++++}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff888078bac0e0 (&type->s_umount_key#52){++++}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff888078bac0e0 (&type->s_umount_key#52){++++}-{3:3}, at: deactivate_super+0xd6/0x100 fs/super.c:505
#1: ffffffff8e1d5ee8 (nfsd_mutex){+.+.}-{3:3}, at: nfsd_shutdown_threads+0x5b/0xf0 fs/nfsd/nfssvc.c:625
2 locks held by syz-executor/12676:
#0: ffff88805d7020e0 (&type->s_umount_key#52){++++}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff88805d7020e0 (&type->s_umount_key#52){++++}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff88805d7020e0 (&type->s_umount_key#52){++++}-{3:3}, at: deactivate_super+0xd6/0x100 fs/super.c:505
#1: ffffffff8e1d5ee8 (nfsd_mutex){+.+.}-{3:3}, at: nfsd_shutdown_threads+0x5b/0xf0 fs/nfsd/nfssvc.c:625
2 locks held by syz-executor/12777:
#0: ffff888085f3e0e0 (&type->s_umount_key#52){++++}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff888085f3e0e0 (&type->s_umount_key#52){++++}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff888085f3e0e0 (&type->s_umount_key#52){++++}-{3:3}, at: deactivate_super+0xd6/0x100 fs/super.c:505
#1: ffffffff8e1d5ee8 (nfsd_mutex){+.+.}-{3:3}, at: nfsd_shutdown_threads+0x5b/0xf0 fs/nfsd/nfssvc.c:625
2 locks held by syz.9.1290/12911:
#0: ffffffff8fb66650 (cb_lock){++++}-{3:3}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1218
#1: ffffffff8e1d5ee8 (nfsd_mutex){+.+.}-{3:3}, at: nfsd_nl_listener_set_doit+0xe3/0x1b40 fs/nfsd/nfsctl.c:1964
2 locks held by syz.9.1290/12914:
#0: ffff888066c780e0 (&type->s_umount_key#52){++++}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff888066c780e0 (&type->s_umount_key#52){++++}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff888066c780e0 (&type->s_umount_key#52){++++}-{3:3}, at: deactivate_super+0xd6/0x100 fs/super.c:505
#1: ffffffff8e1d5ee8 (nfsd_mutex){+.+.}-{3:3}, at: nfsd_shutdown_threads+0x5b/0xf0 fs/nfsd/nfssvc.c:625
2 locks held by syz-executor/13234:
#0: ffff888044a000e0 (&type->s_umount_key#52){++++}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff888044a000e0 (&type->s_umount_key#52){++++}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff888044a000e0 (&type->s_umount_key#52){++++}-{3:3}, at: deactivate_super+0xd6/0x100 fs/super.c:505
#1: ffffffff8e1d5ee8 (nfsd_mutex){+.+.}-{3:3}, at: nfsd_shutdown_threads+0x5b/0xf0 fs/nfsd/nfssvc.c:625
2 locks held by syz-executor/13989:
#0: ffff8880860c20e0 (&type->s_umount_key#52){++++}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff8880860c20e0 (&type->s_umount_key#52){++++}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff8880860c20e0 (&type->s_umount_key#52){++++}-{3:3}, at: deactivate_super+0xd6/0x100 fs/super.c:505
#1: ffffffff8e1d5ee8 (nfsd_mutex){+.+.}-{3:3}, at: nfsd_shutdown_threads+0x5b/0xf0 fs/nfsd/nfssvc.c:625
2 locks held by syz-executor/14253:
#0: ffff88806cfca0e0 (&type->s_umount_key#52){++++}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff88806cfca0e0 (&type->s_umount_key#52){++++}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff88806cfca0e0 (&type->s_umount_key#52){++++}-{3:3}, at: deactivate_super+0xd6/0x100 fs/super.c:505
#1: ffffffff8e1d5ee8 (nfsd_mutex){+.+.}-{3:3}, at: nfsd_shutdown_threads+0x5b/0xf0 fs/nfsd/nfssvc.c:625
2 locks held by syz-executor/14332:
#0: ffff888026f5c0e0 (&type->s_umount_key#52){++++}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff888026f5c0e0 (&type->s_umount_key#52){++++}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff888026f5c0e0 (&type->s_umount_key#52){++++}-{3:3}, at: deactivate_super+0xd6/0x100 fs/super.c:505
#1: ffffffff8e1d5ee8 (nfsd_mutex){+.+.}-{3:3}, at: nfsd_shutdown_threads+0x5b/0xf0 fs/nfsd/nfssvc.c:625
6 locks held by kworker/u8:19/14788:
2 locks held by syz-executor/14919:
#0: ffff888079b820e0 (&type->s_umount_key#52){++++}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff888079b820e0 (&type->s_umount_key#52){++++}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff888079b820e0 (&type->s_umount_key#52){++++}-{3:3}, at: deactivate_super+0xd6/0x100 fs/super.c:505
#1: ffffffff8e1d5ee8 (nfsd_mutex){+.+.}-{3:3}, at: nfsd_shutdown_threads+0x5b/0xf0 fs/nfsd/nfssvc.c:625
2 locks held by syz-executor/15343:
#0: ffff8880781400e0 (&type->s_umount_key#52){++++}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff8880781400e0 (&type->s_umount_key#52){++++}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff8880781400e0 (&type->s_umount_key#52){++++}-{3:3}, at: deactivate_super+0xd6/0x100 fs/super.c:505
#1: ffffffff8e1d5ee8 (nfsd_mutex){+.+.}-{3:3}, at: nfsd_shutdown_threads+0x5b/0xf0 fs/nfsd/nfssvc.c:625
2 locks held by dhcpcd/16027:
#0: ffff8880796e6258 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1611 [inline]
#0: ffff8880796e6258 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x2c/0xf60 net/packet/af_packet.c:3266
#1: ffffffff8ddc3278 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock+0x282/0x3b0 kernel/rcu/tree_exp.h:297
2 locks held by dhcpcd/16033:
#0: ffff8880480d8258 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1611 [inline]
#0: ffff8880480d8258 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x2c/0xf60 net/packet/af_packet.c:3266
#1: ffffffff8ddc3278 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock+0x1a4/0x3b0 kernel/rcu/tree_exp.h:329
1 lock held by dhcpcd/16034:
#0: ffff88803460a258 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1611 [inline]
#0: ffff88803460a258 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x2c/0xf60 net/packet/af_packet.c:3266
1 lock held by dhcpcd/16035:
#0: ffff888096bce258 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1611 [inline]
#0: ffff888096bce258 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x2c/0xf60 net/packet/af_packet.c:3266
1 lock held by dhcpcd/16036:
#0: ffff888096c40258 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1611 [inline]
#0: ffff888096c40258 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x2c/0xf60 net/packet/af_packet.c:3266
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-syzkaller-00233-g9fb2cfa4635a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
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: 12 Comm: kworker/u8:1 Not tainted 6.12.0-syzkaller-00233-g9fb2cfa4635a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
Workqueue: bat_events batadv_nc_worker
RIP: 0010:trace_lock_release include/trace/events/lock.h:69 [inline]
RIP: 0010:lock_release+0xb1/0x6f0 kernel/locking/lockdep.c:5836
Code: 07 0f 87 21 05 00 00 89 ed be 08 00 00 00 48 89 e8 48 c1 e8 06 48 8d 3c c5 88 2c 1d 90 e8 c7 1a 84 00 48 0f a3 2d 07 fc b2 0e <0f> 82 3a 04 00 00 48 c7 c5 78 5f 1d 90 48 b8 00 00 00 00 00 fc ff
RSP: 0018:ffffc90000117ad0 EFLAGS: 00000247
RAX: 0000000000000001 RBX: 1ffff92000022f5c RCX: ffffffff816a3079
RDX: fffffbfff203a592 RSI: 0000000000000008 RDI: ffffffff901d2c88
RBP: 0000000000000001 R08: 0000000000000000 R09: fffffbfff203a591
R10: ffffffff901d2c8f R11: 0000000000000000 R12: ffffffff8ddb7980
R13: ffff88801aca0000 R14: 000000000003dc0c R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd81a0cbd8 CR3: 000000000db7c000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
rcu_lock_release include/linux/rcupdate.h:347 [inline]
rcu_read_unlock include/linux/rcupdate.h:880 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:412 [inline]
batadv_nc_worker+0x88c/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