INFO: task syz.5.819:10109 blocked for more than 143 seconds.
Not tainted 6.13.0-syzkaller-09760-g69e858e0b8b2 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.5.819 state:D stack:26416 pid:10109 tgid:10108 ppid:7629 task_flags:0x400140 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5377 [inline]
__schedule+0xf43/0x5890 kernel/sched/core.c:6764
__schedule_loop kernel/sched/core.c:6841 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6856
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6913
__mutex_lock_common kernel/locking/mutex.c:662 [inline]
__mutex_lock+0x6bd/0xb10 kernel/locking/mutex.c:730
nfsd_nl_rpc_status_get_dumpit+0xb1/0x1160 fs/nfsd/nfsctl.c:1516
genl_dumpit+0x122/0x230 net/netlink/genetlink.c:1027
netlink_dump+0x53c/0xd00 net/netlink/af_netlink.c:2318
__netlink_dump_start+0x6d9/0x980 net/netlink/af_netlink.c:2433
genl_family_rcv_msg_dumpit+0x1e1/0x2e0 net/netlink/genetlink.c:1076
genl_family_rcv_msg net/netlink/genetlink.c:1192 [inline]
genl_rcv_msg+0x470/0x800 net/netlink/genetlink.c:1210
netlink_rcv_skb+0x165/0x410 net/netlink/af_netlink.c:2543
genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219
netlink_unicast_kernel net/netlink/af_netlink.c:1322 [inline]
netlink_unicast+0x53c/0x7f0 net/netlink/af_netlink.c:1348
netlink_sendmsg+0x8b8/0xd70 net/netlink/af_netlink.c:1892
sock_sendmsg_nosec net/socket.c:713 [inline]
__sock_sendmsg net/socket.c:728 [inline]
____sys_sendmsg+0x9ae/0xb40 net/socket.c:2568
___sys_sendmsg+0x135/0x1e0 net/socket.c:2622
__sys_sendmsg+0x16e/0x220 net/socket.c:2654
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: 0033:0x7f21ce18cda9
RSP: 002b:00007f21cf0d5038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f21ce3a5fa0 RCX: 00007f21ce18cda9
RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000000000004
RBP: 00007f21ce20e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f21ce3a5fa0 R15: 00007fff08cd5108
INFO: task syz.3.834:10164 blocked for more than 145 seconds.
Not tainted 6.13.0-syzkaller-09760-g69e858e0b8b2 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.834 state:D stack:26000 pid:10164 tgid:10163 ppid:5841 task_flags:0x400040 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5377 [inline]
__schedule+0xf43/0x5890 kernel/sched/core.c:6764
__schedule_loop kernel/sched/core.c:6841 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6856
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6913
__mutex_lock_common kernel/locking/mutex.c:662 [inline]
__mutex_lock+0x6bd/0xb10 kernel/locking/mutex.c:730
nfsd_nl_rpc_status_get_dumpit+0xb1/0x1160 fs/nfsd/nfsctl.c:1516
genl_dumpit+0x122/0x230 net/netlink/genetlink.c:1027
netlink_dump+0x53c/0xd00 net/netlink/af_netlink.c:2318
__netlink_dump_start+0x6d9/0x980 net/netlink/af_netlink.c:2433
genl_family_rcv_msg_dumpit+0x1e1/0x2e0 net/netlink/genetlink.c:1076
genl_family_rcv_msg net/netlink/genetlink.c:1192 [inline]
genl_rcv_msg+0x470/0x800 net/netlink/genetlink.c:1210
netlink_rcv_skb+0x165/0x410 net/netlink/af_netlink.c:2543
genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219
netlink_unicast_kernel net/netlink/af_netlink.c:1322 [inline]
netlink_unicast+0x53c/0x7f0 net/netlink/af_netlink.c:1348
netlink_sendmsg+0x8b8/0xd70 net/netlink/af_netlink.c:1892
sock_sendmsg_nosec net/socket.c:713 [inline]
__sock_sendmsg net/socket.c:728 [inline]
____sys_sendmsg+0x9ae/0xb40 net/socket.c:2568
___sys_sendmsg+0x135/0x1e0 net/socket.c:2622
__sys_sendmsg+0x16e/0x220 net/socket.c:2654
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: 0033:0x7fb6b258cda9
RSP: 002b:00007fb6b34c6038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fb6b27a5fa0 RCX: 00007fb6b258cda9
RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000000000003
RBP: 00007fb6b34c6090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 00007fb6b27a5fa0 R15: 00007ffca132ca28
Showing all locks held in the system:
3 locks held by kworker/u8:0/11:
1 lock held by khungtaskd/31:
#0: ffffffff8e1bc080 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8e1bc080 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8e1bc080 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x7f/0x390 kernel/locking/lockdep.c:6746
2 locks held by kworker/0:2/90:
#0: ffff88801b080d48 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x12cd/0x1b30 kernel/workqueue.c:3211
#1: ffffc900025ffd18 (free_ipc_work){+.+.}-{0:0}, at: process_one_work+0x8bb/0x1b30 kernel/workqueue.c:3212
1 lock held by dhcpcd/7993:
#0: ffff88807b3c9408 (&sb->s_type->i_mutex_key#10){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:865 [inline]
#0: ffff88807b3c9408 (&sb->s_type->i_mutex_key#10){+.+.}-{4:4}, at: __sock_release+0x86/0x270 net/socket.c:641
1 lock held by dhcpcd/8118:
#0: ffff8880625cee08 (&sb->s_type->i_mutex_key#10){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:865 [inline]
#0: ffff8880625cee08 (&sb->s_type->i_mutex_key#10){+.+.}-{4:4}, at: __sock_release+0x86/0x270 net/socket.c:641
2 locks held by syz.0.813/10081:
#0: ffffffff8ff770f0 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1218
#1: ffffffff8e5bd6c8 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_nl_listener_set_doit+0xe3/0x1b40 fs/nfsd/nfsctl.c:1922
3 locks held by syz.5.819/10109:
#0: ffffffff8ff770f0 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1218
#1: ffff88805bc306c8 (nlk_cb_mutex-GENERIC){+.+.}-{4:4}, at: __netlink_dump_start+0x154/0x980 net/netlink/af_netlink.c:2397
#2: ffffffff8e5bd6c8 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_nl_rpc_status_get_dumpit+0xb1/0x1160 fs/nfsd/nfsctl.c:1516
3 locks held by syz.3.834/10164:
#0: ffffffff8ff770f0 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1218
#1: ffff888022b836c8 (nlk_cb_mutex-GENERIC){+.+.}-{4:4}, at: __netlink_dump_start+0x154/0x980 net/netlink/af_netlink.c:2397
#2: ffffffff8e5bd6c8 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_nl_rpc_status_get_dumpit+0xb1/0x1160 fs/nfsd/nfsctl.c:1516
2 locks held by syz-executor/10276:
#0: ffff8880618340e0 (&type->s_umount_key#52){+.+.}-{4:4}, at: __super_lock fs/super.c:56 [inline]
#0: ffff8880618340e0 (&type->s_umount_key#52){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff8880618340e0 (&type->s_umount_key#52){+.+.}-{4:4}, at: deactivate_super+0xd6/0x100 fs/super.c:505
#1: ffffffff8e5bd6c8 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_shutdown_threads+0x5b/0xf0 fs/nfsd/nfssvc.c:596
3 locks held by syz.8.935/10658:
#0: ffffffff8ff770f0 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1218
#1: ffff888061a546c8 (nlk_cb_mutex-GENERIC){+.+.}-{4:4}, at: __netlink_dump_start+0x154/0x980 net/netlink/af_netlink.c:2397
#2: ffffffff8e5bd6c8 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_nl_rpc_status_get_dumpit+0xb1/0x1160 fs/nfsd/nfsctl.c:1516
2 locks held by syz-executor/10883:
#0: ffff88808cc6c0e0 (&type->s_umount_key#52){+.+.}-{4:4}, at: __super_lock fs/super.c:56 [inline]
#0: ffff88808cc6c0e0 (&type->s_umount_key#52){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff88808cc6c0e0 (&type->s_umount_key#52){+.+.}-{4:4}, at: deactivate_super+0xd6/0x100 fs/super.c:505
#1: ffffffff8e5bd6c8 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_shutdown_threads+0x5b/0xf0 fs/nfsd/nfssvc.c:596
3 locks held by syz-executor/10933:
#0: ffff88802a294d80 (&hdev->req_lock){+.+.}-{4:4}, at: hci_dev_do_close+0x26/0x90 net/bluetooth/hci_core.c:480
#1: ffff88802a294078 (&hdev->lock){+.+.}-{4:4}, at: hci_dev_close_sync+0x34c/0x1250 net/bluetooth/hci_sync.c:5185
#2: ffffffff8e1c74f8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock+0x1a4/0x3b0 kernel/rcu/tree_exp.h:334
2 locks held by getty/11342:
#0: ffff88814df910a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc9000bd6b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0xfba/0x1480 drivers/tty/n_tty.c:2211
3 locks held by syz.7.1145/11972:
#0: ffffffff8ff770f0 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1218
#1: ffff8880316426c8 (nlk_cb_mutex-GENERIC){+.+.}-{4:4}, at: __netlink_dump_start+0x154/0x980 net/netlink/af_netlink.c:2397
#2: ffffffff8e5bd6c8 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_nl_rpc_status_get_dumpit+0xb1/0x1160 fs/nfsd/nfsctl.c:1516
3 locks held by syz.1.1211/12422:
#0: ffff88808aba4d80 (&hdev->req_lock){+.+.}-{4:4}, at: hci_dev_do_close+0x26/0x90 net/bluetooth/hci_core.c:480
#1: ffff88808aba4078 (&hdev->lock){+.+.}-{4:4}, at: hci_dev_close_sync+0x34c/0x1250 net/bluetooth/hci_sync.c:5185
#2: ffffffff8e1c74f8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock+0x1a4/0x3b0 kernel/rcu/tree_exp.h:334
2 locks held by syz.0.1223/12503:
#0: ffff88808b8fcd80 (&hdev->req_lock){+.+.}-{4:4}, at: hci_dev_do_close+0x26/0x90 net/bluetooth/hci_core.c:480
#1: ffff88808b8fc078 (&hdev->lock){+.+.}-{4:4}, at: hci_dev_close_sync+0x34c/0x1250 net/bluetooth/hci_sync.c:5185
3 locks held by dhcpcd-run-hook/12568:
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.13.0-syzkaller-09760-g69e858e0b8b2 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
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:236 [inline]
watchdog+0xf62/0x12b0 kernel/hung_task.c:399
kthread+0x3af/0x750 kernel/kthread.c:464
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:148
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: 11 Comm: kworker/u8:0 Not tainted 6.13.0-syzkaller-09760-g69e858e0b8b2 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Workqueue: bat_events batadv_iv_send_outstanding_bat_ogm_packet
RIP: 0010:check_wait_context kernel/locking/lockdep.c:4894 [inline]
RIP: 0010:__lock_acquire+0x67a/0x3c40 kernel/locking/lockdep.c:5178
Code: 84 c9 74 3a 48 8d b8 c6 00 00 00 41 38 ce 44 0f 47 f1 49 89 f8 49 89 f9 49 c1 e8 03 41 83 e1 07 45 0f b6 04 28 45 38 c8 7f 09 <45> 84 c0 0f 85 d2 26 00 00 80 b8 c6 00 00 00 02 44 0f 44 f1 41 0f
RSP: 0018:ffffc900001078c8 EFLAGS: 00000097
RAX: ffffffff96e7cbb0 RBX: ffff88801d28c6f0 RCX: 0000000000000004
RDX: fffffbfff2dc3fb6 RSI: 0000000000000008 RDI: ffffffff96e7cc76
RBP: dffffc0000000000 R08: 0000000000000000 R09: 0000000000000006
R10: ffffffff96e1fdaf R11: 0000000000000003 R12: ffffed1003a518dd
R13: ffff88801d28bc00 R14: 0000000000000004 R15: 0000000000000002
FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055a026ac2d38 CR3: 0000000032e84000 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:5851
rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
rcu_read_lock include/linux/rcupdate.h:849 [inline]
batadv_iv_ogm_slide_own_bcast_window net/batman-adv/bat_iv_ogm.c:754 [inline]
batadv_iv_ogm_schedule_buff+0x5ac/0x14d0 net/batman-adv/bat_iv_ogm.c:825
batadv_iv_ogm_schedule net/batman-adv/bat_iv_ogm.c:868 [inline]
batadv_iv_ogm_schedule net/batman-adv/bat_iv_ogm.c:861 [inline]
batadv_iv_send_outstanding_bat_ogm_packet+0x31e/0x8d0 net/batman-adv/bat_iv_ogm.c:1712
process_one_work+0x958/0x1b30 kernel/workqueue.c:3236
process_scheduled_works kernel/workqueue.c:3317 [inline]
worker_thread+0x6c8/0xf00 kernel/workqueue.c:3398
kthread+0x3af/0x750 kernel/kthread.c:464
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244