INFO: task syz.0.2871:16805 blocked for more than 143 seconds.
Not tainted 6.14.0-rc6-syzkaller-00016-g0fed89a961ea #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.2871 state:D stack:25056 pid:16805 tgid:16804 ppid:5818 task_flags:0x400140 flags:0x00000006
Call Trace:
context_switch kernel/sched/core.c:5378 [inline]
__schedule+0x18bc/0x4c40 kernel/sched/core.c:6765
__schedule_loop kernel/sched/core.c:6842 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6857
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6914
__mutex_lock_common kernel/locking/mutex.c:662 [inline]
__mutex_lock+0x817/0x1010 kernel/locking/mutex.c:730
blk_trace_remove kernel/trace/blktrace.c:406 [inline]
blk_trace_ioctl+0x1b8/0x830 kernel/trace/blktrace.c:745
blkdev_common_ioctl+0xe6c/0x2460 block/ioctl.c:622
blkdev_ioctl+0x51d/0x6f0 block/ioctl.c:687
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:906 [inline]
__se_sys_ioctl+0xf5/0x170 fs/ioctl.c:892
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f228498d169
RSP: 002b:00007f228574d038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f2284ba5fa0 RCX: 00007f228498d169
RDX: 0000000000000000 RSI: 0000000000001276 RDI: 0000000000000007
RBP: 00007f2284a0e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f2284ba5fa0 R15: 00007ffcb8f56de8
Showing all locks held in the system:
4 locks held by kworker/u8:0/12:
1 lock held by ksoftirqd/1/25:
3 locks held by kworker/1:0/26:
#0: ffff88801b080d48 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3213 [inline]
#0: ffff88801b080d48 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x98b/0x18e0 kernel/workqueue.c:3319
#1: ffffc90000a0fc60 (deferred_process_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3214 [inline]
#1: ffffc90000a0fc60 (deferred_process_work){+.+.}-{0:0}, at: process_scheduled_works+0x9c6/0x18e0 kernel/workqueue.c:3319
#2: ffffffff8fec4508 (rtnl_mutex){+.+.}-{4:4}, at: switchdev_deferred_process_work+0xe/0x20 net/switchdev/switchdev.c:104
1 lock held by khungtaskd/31:
#0: ffffffff8eb393e0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8eb393e0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8eb393e0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6746
3 locks held by kworker/u8:6/1159:
#0: ffff8880309e0148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3213 [inline]
#0: ffff8880309e0148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x98b/0x18e0 kernel/workqueue.c:3319
#1: ffffc90003fdfc60 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3214 [inline]
#1: ffffc90003fdfc60 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9c6/0x18e0 kernel/workqueue.c:3319
#2: ffffffff8fec4508 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_lock include/linux/rtnetlink.h:129 [inline]
#2: ffffffff8fec4508 (rtnl_mutex){+.+.}-{4:4}, at: addrconf_verify_work+0x19/0x30 net/ipv6/addrconf.c:4730
2 locks held by dhcpcd/5490:
#0: ffff88806268e6c8 (nlk_cb_mutex-ROUTE){+.+.}-{4:4}, at: netlink_dump+0xcb/0xe10 net/netlink/af_netlink.c:2254
#1: ffffffff8fec4508 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#1: ffffffff8fec4508 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dumpit+0x99/0x200 net/core/rtnetlink.c:6780
2 locks held by getty/5577:
#0: ffff8880359620a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc9000332b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x616/0x1770 drivers/tty/n_tty.c:2211
2 locks held by kworker/u8:15/12168:
#0: ffff88801b089148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3213 [inline]
#0: ffff88801b089148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x98b/0x18e0 kernel/workqueue.c:3319
#1: ffff8880b8728948 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x387/0x7a0 kernel/sched/psi.c:975
3 locks held by kworker/u8:22/13211:
#0: ffff88801b089148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3213 [inline]
#0: ffff88801b089148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x98b/0x18e0 kernel/workqueue.c:3319
#1: ffffc900048c7c60 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3214 [inline]
#1: ffffc900048c7c60 ((linkwatch_work).work){+.+.}-{0:0}, at: process_scheduled_works+0x9c6/0x18e0 kernel/workqueue.c:3319
#2: ffffffff8fec4508 (rtnl_mutex){+.+.}-{4:4}, at: linkwatch_event+0xe/0x60 net/core/link_watch.c:285
1 lock held by syz.0.2871/16805:
#0: ffff8880253ebfa8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_remove kernel/trace/blktrace.c:406 [inline]
#0: ffff8880253ebfa8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_ioctl+0x1b8/0x830 kernel/trace/blktrace.c:745
3 locks held by syz.0.2871/16806:
1 lock held by syz-executor/17601:
#0: ffffffff8fec4508 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffffffff8fec4508 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:335 [inline]
#0: ffffffff8fec4508 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0xc55/0x1d30 net/core/rtnetlink.c:4021
1 lock held by syz.6.3104/17789:
#0: ffffffff8fec4508 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffffffff8fec4508 (rtnl_mutex){+.+.}-{4:4}, at: rtnetlink_rcv_msg+0x6e6/0xcf0 net/core/rtnetlink.c:6918
1 lock held by syz.2.3108/17801:
#0: ffffffff8fec4508 (rtnl_mutex){+.+.}-{4:4}, at: do_ipv6_setsockopt+0x9a1/0x35b0 net/ipv6/ipv6_sockglue.c:566
1 lock held by syz.2.3108/17802:
#0: ffffffff8fec4508 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_lock include/linux/rtnetlink.h:129 [inline]
#0: ffffffff8fec4508 (rtnl_mutex){+.+.}-{4:4}, at: dev_ioctl+0x86e/0x1340 net/core/dev_ioctl.c:852
2 locks held by syz.4.3114/17821:
#0: ffffffff8f6b3a48 (ppp_mutex){+.+.}-{4:4}, at: ppp_ioctl+0x112/0x1cd0 drivers/net/ppp/ppp_generic.c:740
#1: ffffffff8fec4508 (rtnl_mutex){+.+.}-{4:4}, at: ppp_create_interface drivers/net/ppp/ppp_generic.c:3356 [inline]
#1: ffffffff8fec4508 (rtnl_mutex){+.+.}-{4:4}, at: ppp_unattached_ioctl drivers/net/ppp/ppp_generic.c:1071 [inline]
#1: ffffffff8fec4508 (rtnl_mutex){+.+.}-{4:4}, at: ppp_ioctl+0x789/0x1cd0 drivers/net/ppp/ppp_generic.c:744
1 lock held by syz.4.3114/17822:
#0: ffffffff8f6b3a48 (ppp_mutex){+.+.}-{4:4}, at: ppp_ioctl+0x112/0x1cd0 drivers/net/ppp/ppp_generic.c:740
3 locks held by syz.5.3115/17824:
#0: ffff88807cbb5608 (&sb->s_type->i_mutex_key#9){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:877 [inline]
#0: ffff88807cbb5608 (&sb->s_type->i_mutex_key#9){+.+.}-{4:4}, at: __sock_release net/socket.c:646 [inline]
#0: ffff88807cbb5608 (&sb->s_type->i_mutex_key#9){+.+.}-{4:4}, at: sock_close+0x90/0x240 net/socket.c:1398
#1: ffff88807ffcc358 (sk_lock-AF_PHONET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1624 [inline]
#1: ffff88807ffcc358 (sk_lock-AF_PHONET){+.+.}-{0:0}, at: pep_sock_unhash+0x2b/0x310 net/phonet/pep.c:1325
#2: ffffffff8eb3e8b8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:334 [inline]
#2: ffffffff8eb3e8b8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x451/0x820 kernel/rcu/tree_exp.h:996
1 lock held by syz.5.3115/17826:
#0: ffffffff8f6b3a48 (ppp_mutex){+.+.}-{4:4}, at: ppp_ioctl+0x112/0x1cd0 drivers/net/ppp/ppp_generic.c:740
1 lock held by syz.5.3115/17827:
#0: ffffffff8f6b3a48 (ppp_mutex){+.+.}-{4:4}, at: ppp_ioctl+0x112/0x1cd0 drivers/net/ppp/ppp_generic.c:740
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.14.0-rc6-syzkaller-00016-g0fed89a961ea #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
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:162 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:236 [inline]
watchdog+0x1058/0x10a0 kernel/hung_task.c:399
kthread+0x7a9/0x920 kernel/kthread.c:464
ret_from_fork+0x4b/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: 17249 Comm: kworker/u8:1 Not tainted 6.14.0-rc6-syzkaller-00016-g0fed89a961ea #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue: bond4 bond_alb_monitor
RIP: 0010:preempt_count_add+0x4/0x190 kernel/sched/core.c:5847
Code: 7c 97 48 8b 3c 24 e8 1b 1c 97 00 eb 8c e9 ee fe ff ff 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa <41> 57 41 56 53 89 fb 48 c7 c0 80 e9 61 9a 48 c1 e8 03 49 bf 00 00
RSP: 0018:ffffc900033d6908 EFLAGS: 00000202
RAX: 0000000000000001 RBX: 1ffff9200067ad3c RCX: ffffc900033d6e30
RDX: dffffc0000000000 RSI: ffffffff8a73fdad RDI: 0000000000000001
RBP: ffffc900033d6a18 R08: 0000000000000005 R09: ffffc900033d6ad0
R10: ffffc900033d6a30 R11: ffffffff81ad6ae0 R12: dffffc0000000000
R13: ffffc900033d69e0 R14: ffffffff8a73fdad R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0bbe3e74a0 CR3: 000000000e938000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
unwind_next_frame+0xb0/0x22d0 arch/x86/kernel/unwind_orc.c:479
arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122
ref_tracker_alloc+0x188/0x490 lib/ref_tracker.c:209
__netdev_tracker_alloc include/linux/netdevice.h:4282 [inline]
netdev_hold include/linux/netdevice.h:4311 [inline]
dst_init+0xee/0x490 net/core/dst.c:52
dst_alloc+0x14f/0x190 net/core/dst.c:93
rt_dst_clone+0x52/0x650 net/ipv4/route.c:1666
ip_mc_finish_output+0xbe/0x5a0 net/ipv4/ip_output.c:356
NF_HOOK include/linux/netfilter.h:314 [inline]
ip_mc_output+0x279/0x5c0 net/ipv4/ip_output.c:400
iptunnel_xmit+0x55d/0x9b0 net/ipv4/ip_tunnel_core.c:82
ip_tunnel_xmit+0x1dbf/0x2560 net/ipv4/ip_tunnel.c:858
__gre_xmit net/ipv4/ip_gre.c:484 [inline]
gre_tap_xmit+0x641/0x800 net/ipv4/ip_gre.c:772
__netdev_start_xmit include/linux/netdevice.h:5151 [inline]
netdev_start_xmit include/linux/netdevice.h:5160 [inline]
xmit_one net/core/dev.c:3800 [inline]
dev_hard_start_xmit+0x27a/0x7d0 net/core/dev.c:3816
sch_direct_xmit+0x29c/0x5d0 net/sched/sch_generic.c:343
qdisc_restart net/sched/sch_generic.c:408 [inline]
__qdisc_run+0xc0e/0x2180 net/sched/sch_generic.c:416
__dev_xmit_skb net/core/dev.c:4041 [inline]
__dev_queue_xmit+0x1ad9/0x3f50 net/core/dev.c:4615
dev_queue_xmit include/linux/netdevice.h:3313 [inline]
alb_send_lp_vid+0x3b1/0x650 drivers/net/bonding/bond_alb.c:949
alb_send_learning_packets+0x19b/0x380 drivers/net/bonding/bond_alb.c:1012
bond_alb_monitor+0x3f3/0x1750 drivers/net/bonding/bond_alb.c:1564
process_one_work kernel/workqueue.c:3238 [inline]
process_scheduled_works+0xabe/0x18e0 kernel/workqueue.c:3319
worker_thread+0x870/0xd30 kernel/workqueue.c:3400
kthread+0x7a9/0x920 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244