INFO: task syz-executor:4187 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:21840 pid: 4187 ppid: 1 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5049 [inline]
__schedule+0x11ef/0x43c0 kernel/sched/core.c:6395
schedule+0x11b/0x1e0 kernel/sched/core.c:6478
schedule_timeout+0x184/0x2d0 kernel/time/timer.c:1914
gfs2_gl_hash_clear+0x1ab/0x2f0 fs/gfs2/glock.c:2183
gfs2_put_super+0x769/0x7d0 fs/gfs2/super.c:624
generic_shutdown_super+0x130/0x300 fs/super.c:475
kill_block_super+0x7c/0xe0 fs/super.c:1427
deactivate_locked_super+0x93/0xf0 fs/super.c:335
cleanup_mnt+0x42d/0x4e0 fs/namespace.c:1148
task_work_run+0x125/0x1a0 kernel/task_work.c:188
tracehook_notify_resume include/linux/tracehook.h:189 [inline]
exit_to_user_mode_loop+0x10f/0x130 kernel/entry/common.c:181
exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:214
__syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:307
do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f45ad46cf17
RSP: 002b:00007ffe05c30f28 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f45ad4d571f RCX: 00007f45ad46cf17
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffe05c30fe0
RBP: 00007ffe05c30fe0 R08: 00007ffe05c31fe0 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe05c32070
R13: 00007f45ad4d571f R14: 000000000002fa31 R15: 00007ffe05c320b0
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8c31c720 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
4 locks held by kworker/u4:4/1269:
1 lock held by dhcpcd/3854:
#0: ffffffff8d4354c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
#0: ffffffff8d4354c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x7ee/0xf30 net/core/rtnetlink.c:5681
2 locks held by getty/3949:
#0: ffff88814d432098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252
#1: ffffc900025e62e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x5df/0x1a70 drivers/tty/n_tty.c:2158
2 locks held by syz-executor/4185:
#0: ffff8880780d00e0 (&type->s_umount_key#69){++++}-{3:3}, at: deactivate_super+0xa0/0xd0 fs/super.c:365
#1: ffff888078332c90 (&jl->j_commit_mutex){+.+.}-{3:3}, at: reiserfs_mutex_lock_safe fs/reiserfs/reiserfs.h:814 [inline]
#1: ffff888078332c90 (&jl->j_commit_mutex){+.+.}-{3:3}, at: flush_commit_list+0x6de/0x1d70 fs/reiserfs/journal.c:1005
1 lock held by syz-executor/4187:
#0: ffff88805e7a20e0 (&type->s_umount_key#120){++++}-{3:3}, at: deactivate_super+0xa0/0xd0 fs/super.c:365
2 locks held by kworker/0:6/4256:
#0: ffff888016c72138 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x761/0x1010 kernel/workqueue.c:-1
#1: ffffc9000335fd00 ((work_completion)(&rew.rew_work)){+.+.}-{0:0}, at: process_one_work+0x79f/0x1010 kernel/workqueue.c:2285
3 locks held by kworker/1:7/4291:
#0: ffff888016c70938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x761/0x1010 kernel/workqueue.c:-1
#1: ffffc900033ffd00 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work+0x79f/0x1010 kernel/workqueue.c:2285
#2: ffff888062bcd240 (&data->fib_lock){+.+.}-{3:3}, at: nsim_fib_event_work+0x26a/0x33e0 drivers/net/netdevsim/fib.c:1480
1 lock held by udevd/4427:
2 locks held by udevd/4849:
2 locks held by kworker/0:8/5546:
2 locks held by kworker/u4:7/7819:
#0: ffff8880b903a358 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x26/0x140 kernel/sched/core.c:475
#1: ffff8880b9027888 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x4fe/0x7d0 kernel/sched/psi.c:891
1 lock held by syz.6.4554/20317:
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: khungtaskd Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Call Trace:
dump_stack_lvl+0x188/0x250 lib/dump_stack.c:106
nmi_cpu_backtrace+0x3a2/0x3d0 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x163/0x280 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline]
watchdog+0xe0f/0xe50 kernel/hung_task.c:369
kthread+0x436/0x520 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 4256 Comm: kworker/0:6 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Workqueue: events nsim_dev_trap_report_work
RIP: 0010:__lock_is_held kernel/locking/lockdep.c:5363 [inline]
RIP: 0010:lock_is_held_type+0xad/0x190 kernel/locking/lockdep.c:5666
Code: 7e 4b 44 89 fd 49 89 df 49 81 c7 f0 0a 00 00 45 31 e4 49 83 fc 31 73 24 4c 89 ff 4c 89 f6 e8 fa 01 00 00 85 c0 75 2a 49 ff c4 <48> 63 83 e8 0a 00 00 49 83 c7 28 49 39 c4 7c d8 eb 11 48 c7 c7 40
RSP: 0018:ffffc900000067f8 EFLAGS: 00000002
RAX: 0000000000000000 RBX: ffff888029c58000 RCX: 0000000000000000
RDX: 0000000000000100 RSI: ffffffff8c31c720 RDI: ffff888029c58af0
RBP: 00000000ffffffff R08: dffffc0000000000 R09: 1ffffffff2037218
R10: dffffc0000000000 R11: fffffbfff2037219 R12: 0000000000000001
R13: 0000000000000246 R14: ffffffff8c31c720 R15: ffff888029c58af0
FS: 0000000000000000(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff69d066000 CR3: 000000002b62f000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
batadv_primary_if_get_selected+0x12d/0x3d0 net/batman-adv/hard-interface.h:110
__batadv_forw_bcast_packet+0x94/0xa60 net/batman-adv/send.c:927
batadv_send_bcast_packet+0x27/0x40 net/batman-adv/send.c:998
batadv_interface_tx+0xeef/0x1450 net/batman-adv/soft-interface.c:354
__netdev_start_xmit include/linux/netdevice.h:5036 [inline]
netdev_start_xmit include/linux/netdevice.h:5050 [inline]
xmit_one net/core/dev.c:3649 [inline]
dev_hard_start_xmit+0x2a5/0x7e0 net/core/dev.c:3665
__dev_queue_xmit+0x1a78/0x2fd0 net/core/dev.c:4288
br_dev_queue_push_xmit+0x692/0x850 net/bridge/br_forward.c:53
NF_HOOK+0x2f9/0x380 include/linux/netfilter.h:302
br_forward_finish+0x74/0x80 net/bridge/br_forward.c:66
br_nf_hook_thresh net/bridge/br_netfilter_hooks.c:1155 [inline]
br_nf_forward_finish+0x9bb/0xd50 net/bridge/br_netfilter_hooks.c:662
NF_HOOK+0x5c7/0x640 include/linux/netfilter.h:302
br_nf_forward_arp+0x5da/0xb20 net/bridge/br_netfilter_hooks.c:772
nf_hook_entry_hookfn include/linux/netfilter.h:142 [inline]
nf_hook_slow+0xb9/0x200 net/netfilter/core.c:584
nf_hook include/linux/netfilter.h:257 [inline]
NF_HOOK+0x1f3/0x380 include/linux/netfilter.h:300
__br_forward+0x433/0x610 net/bridge/br_forward.c:115
deliver_clone net/bridge/br_forward.c:131 [inline]
maybe_deliver+0xb5/0x150 net/bridge/br_forward.c:190
br_flood+0x2fc/0x450 net/bridge/br_forward.c:232
br_handle_frame_finish+0xfbd/0x1270 net/bridge/br_input.c:180
nf_hook_bridge_pre net/bridge/br_input.c:264 [inline]
br_handle_frame+0xa93/0x1190 net/bridge/br_input.c:384
__netif_receive_skb_core+0xfef/0x3690 net/core/dev.c:5419
__netif_receive_skb_one_core net/core/dev.c:5523 [inline]
__netif_receive_skb+0x74/0x290 net/core/dev.c:5639
process_backlog+0x370/0x790 net/core/dev.c:6516
__napi_poll+0xc0/0x430 net/core/dev.c:7075
napi_poll net/core/dev.c:7142 [inline]
net_rx_action+0x4d4/0xa10 net/core/dev.c:7232
handle_softirqs+0x339/0x830 kernel/softirq.c:576
do_softirq+0x142/0x210 kernel/softirq.c:477
__local_bh_enable_ip+0x180/0x1c0 kernel/softirq.c:401
spin_unlock_bh include/linux/spinlock.h:409 [inline]
nsim_dev_trap_report drivers/net/netdevsim/dev.c:736 [inline]
nsim_dev_trap_report_work+0x7c0/0xb40 drivers/net/netdevsim/dev.c:762
process_one_work+0x85f/0x1010 kernel/workqueue.c:2310
worker_thread+0xaa6/0x1290 kernel/workqueue.c:2457
kthread+0x436/0x520 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287