INFO: task kworker/u8:7:3470 blocked for more than 143 seconds.
Tainted: G U 6.14.0-syzkaller-01103-g2df0c02dab82 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u8:7 state:D stack:24696 pid:3470 tgid:3470 ppid:2 task_flags:0x4208060 flags:0x00004000
Workqueue: netns cleanup_net
Call Trace:
context_switch kernel/sched/core.c:5367 [inline]
__schedule+0x1129/0x5c00 kernel/sched/core.c:6748
__schedule_loop kernel/sched/core.c:6825 [inline]
schedule+0xe7/0x3a0 kernel/sched/core.c:6840
schedule_timeout+0x242/0x280 kernel/time/sleep_timeout.c:75
do_wait_for_common kernel/sched/completion.c:95 [inline]
__wait_for_common+0x3df/0x600 kernel/sched/completion.c:116
__debugfs_file_removed fs/debugfs/inode.c:775 [inline]
remove_one+0x312/0x420 fs/debugfs/inode.c:782
simple_recursive_removal+0x4e2/0x8e0 fs/libfs.c:635
debugfs_remove+0x5d/0x80 fs/debugfs/inode.c:805
nsim_dev_health_exit+0x3b/0xe0 drivers/net/netdevsim/health.c:227
nsim_dev_reload_destroy+0x144/0x4d0 drivers/net/netdevsim/dev.c:1664
nsim_dev_reload_down+0x6e/0xd0 drivers/net/netdevsim/dev.c:968
devlink_reload+0x19e/0x7c0 net/devlink/dev.c:461
devlink_pernet_pre_exit+0x1a0/0x2b0 net/devlink/core.c:509
ops_pre_exit_list net/core/net_namespace.c:162 [inline]
cleanup_net+0x494/0xb30 net/core/net_namespace.c:632
process_one_work+0x9cc/0x1b70 kernel/workqueue.c:3238
process_scheduled_works kernel/workqueue.c:3319 [inline]
worker_thread+0x6c1/0xef0 kernel/workqueue.c:3400
kthread+0x3a4/0x760 kernel/kthread.c:464
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
INFO: task syz.3.663:8917 blocked for more than 144 seconds.
Tainted: G U 6.14.0-syzkaller-01103-g2df0c02dab82 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.663 state:D stack:27368 pid:8917 tgid:8915 ppid:5846 task_flags:0x400140 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5367 [inline]
__schedule+0x1129/0x5c00 kernel/sched/core.c:6748
__schedule_loop kernel/sched/core.c:6825 [inline]
schedule+0xe7/0x3a0 kernel/sched/core.c:6840
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6897
__mutex_lock_common kernel/locking/mutex.c:664 [inline]
__mutex_lock+0x6ae/0xb00 kernel/locking/mutex.c:732
devlink_health_report+0x3ba/0x9c0 net/devlink/health.c:627
nsim_dev_health_break_write+0x166/0x210 drivers/net/netdevsim/health.c:162
full_proxy_write+0x13c/0x200 fs/debugfs/file.c:398
vfs_write+0x25c/0x1180 fs/read_write.c:682
ksys_write+0x12a/0x240 fs/read_write.c:736
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f442f98d169
RSP: 002b:00007f44307fe038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f442fba5fa0 RCX: 00007f442f98d169
RDX: 00000000000000ef RSI: 0000000000000000 RDI: 0000000000000003
RBP: 00007f442fa0e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f442fba5fa0 R15: 00007ffc62c21698
INFO: task syz.5.685:9028 blocked for more than 144 seconds.
Tainted: G U 6.14.0-syzkaller-01103-g2df0c02dab82 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.5.685 state:D stack:27288 pid:9028 tgid:9027 ppid:8909 task_flags:0x400140 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5367 [inline]
__schedule+0x1129/0x5c00 kernel/sched/core.c:6748
__schedule_loop kernel/sched/core.c:6825 [inline]
schedule+0xe7/0x3a0 kernel/sched/core.c:6840
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6897
rwsem_down_read_slowpath+0x625/0xb30 kernel/locking/rwsem.c:1084
__down_read_common kernel/locking/rwsem.c:1248 [inline]
__down_read kernel/locking/rwsem.c:1261 [inline]
down_read+0xef/0x480 kernel/locking/rwsem.c:1526
inode_lock_shared include/linux/fs.h:877 [inline]
open_last_lookups fs/namei.c:3764 [inline]
path_openat+0x88a/0x2d40 fs/namei.c:4001
do_filp_open+0x20b/0x470 fs/namei.c:4031
do_sys_openat2+0x11b/0x1d0 fs/open.c:1429
do_sys_open fs/open.c:1444 [inline]
__do_sys_openat fs/open.c:1460 [inline]
__se_sys_openat fs/open.c:1455 [inline]
__x64_sys_openat+0x174/0x210 fs/open.c:1455
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1bc7d8d169
RSP: 002b:00007f1bc8bc5038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f1bc7fa5fa0 RCX: 00007f1bc7d8d169
RDX: 0000000000000101 RSI: 00002000000000c0 RDI: ffffffffffffff9c
RBP: 00007f1bc7e0e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f1bc7fa5fa0 R15: 00007fff997729a8
Showing all locks held in the system:
1 lock held by khungtaskd/31:
#0: ffffffff8e1be0c0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#0: ffffffff8e1be0c0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#0: ffffffff8e1be0c0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x36/0x1c0 kernel/locking/lockdep.c:6761
2 locks held by kworker/1:2/912:
#0: ffff8880b8739ed8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x29/0x130 kernel/sched/core.c:595
#1: ffff88808ac82018 (&pid_list->lock){-.-.}-{2:2}, at: trace_pid_list_is_set+0x4c/0x150 kernel/trace/pid_list.c:145
6 locks held by kworker/u8:7/3470:
#0: ffff88801bef6148 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x12a2/0x1b70 kernel/workqueue.c:3213
#1: ffffc9000c0c7d18 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x929/0x1b70 kernel/workqueue.c:3214
#2: ffffffff8fee4610 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0xc9/0xb30 net/core/net_namespace.c:606
#3: ffff88805ea6c0e8 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1030 [inline]
#3: ffff88805ea6c0e8 (&dev->mutex){....}-{4:4}, at: devl_dev_lock net/devlink/devl_internal.h:108 [inline]
#3: ffff88805ea6c0e8 (&dev->mutex){....}-{4:4}, at: devlink_pernet_pre_exit+0x12c/0x2b0 net/devlink/core.c:506
#4: ffff88805ea6d250 (&devlink->lock_key#3){+.+.}-{4:4}, at: devl_lock net/devlink/core.c:276 [inline]
#4: ffff88805ea6d250 (&devlink->lock_key#3){+.+.}-{4:4}, at: devl_dev_lock net/devlink/devl_internal.h:109 [inline]
#4: ffff88805ea6d250 (&devlink->lock_key#3){+.+.}-{4:4}, at: devlink_pernet_pre_exit+0x136/0x2b0 net/devlink/core.c:506
#5: ffff888077db4b78 (&sb->s_type->i_mutex_key#3){++++}-{4:4}, at: inode_lock include/linux/fs.h:867 [inline]
#5: ffff888077db4b78 (&sb->s_type->i_mutex_key#3){++++}-{4:4}, at: simple_recursive_removal+0x2f5/0x8e0 fs/libfs.c:627
2 locks held by getty/5603:
#0: ffff8880358020a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc9000332b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0xfa1/0x1450 drivers/tty/n_tty.c:2211
3 locks held by syz.3.663/8917:
#0: ffff88807e6dab78 (&f->f_pos_lock){+.+.}-{4:4}, at: fdget_pos+0x2a2/0x370 fs/file.c:1213
#1: ffff8881426aa420 (sb_writers#8){.+.+}-{0:0}, at: ksys_write+0x12a/0x240 fs/read_write.c:736
#2: ffff88805ea6d250 (&devlink->lock_key#3){+.+.}-{4:4}, at: devlink_health_report+0x3ba/0x9c0 net/devlink/health.c:627
2 locks held by syz.5.685/9028:
#0: ffff8881426aa420 (sb_writers#8){.+.+}-{0:0}, at: open_last_lookups fs/namei.c:3754 [inline]
#0: ffff8881426aa420 (sb_writers#8){.+.+}-{0:0}, at: path_openat+0x1f3e/0x2d40 fs/namei.c:4001
#1: ffff888077db4b78 (&sb->s_type->i_mutex_key#3){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:877 [inline]
#1: ffff888077db4b78 (&sb->s_type->i_mutex_key#3){++++}-{4:4}, at: open_last_lookups fs/namei.c:3764 [inline]
#1: ffff888077db4b78 (&sb->s_type->i_mutex_key#3){++++}-{4:4}, at: path_openat+0x88a/0x2d40 fs/namei.c:4001
1 lock held by syz.4.1312/11489:
2 locks held by syz.4.1312/11490:
3 locks held by syz.4.1313/11529:
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Tainted: G U 6.14.0-syzkaller-01103-g2df0c02dab82 #0 PREEMPT(full)
Tainted: [U]=USER
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+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:158 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:236 [inline]
watchdog+0xf70/0x12c0 kernel/hung_task.c:399
kthread+0x3a4/0x760 kernel/kthread.c:464
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 52 Comm: kworker/u8:3 Tainted: G U 6.14.0-syzkaller-01103-g2df0c02dab82 #0 PREEMPT(full)
Tainted: [U]=USER
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue: bat_events batadv_nc_worker
RIP: 0010:get_current arch/x86/include/asm/current.h:25 [inline]
RIP: 0010:debug_lockdep_rcu_enabled+0x18/0x40 kernel/rcu/update.c:321
Code: 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 8b 05 82 1d 07 05 85 c0 74 20 8b 05 b0 4f 07 05 85 c0 74 16 <65> 48 8b 05 88 ea 20 08 8b 80 ec 0a 00 00 85 c0 0f 94 c0 0f b6 c0
RSP: 0018:ffffc90000bc7b28 EFLAGS: 00000202
RAX: 0000000000000001 RBX: ffff8880292f8628 RCX: ffffffff8b2a1ce9
RDX: ffff88801dabbc00 RSI: ffffffff8b2a1937 RDI: 0000000000000001
RBP: 00000000000000c5 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000000 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff888124f5a000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f26b1d78ab8 CR3: 00000000344e6000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
rcu_read_unlock include/linux/rcupdate.h:869 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:412 [inline]
batadv_nc_worker+0x86c/0x1030 net/batman-adv/network-coding.c:719
process_one_work+0x9cc/0x1b70 kernel/workqueue.c:3238
process_scheduled_works kernel/workqueue.c:3319 [inline]
worker_thread+0x6c1/0xef0 kernel/workqueue.c:3400
kthread+0x3a4/0x760 kernel/kthread.c:464
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245