INFO: task kworker/u8:9:1319 blocked for more than 143 seconds.
Not tainted 6.14.0-rc4-syzkaller-00015-g2a1944bff549 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u8:9 state:D stack:23104 pid:1319 tgid:1319 ppid:2 task_flags:0x4208160 flags:0x00004000
Workqueue: netns cleanup_net
Call Trace:
context_switch kernel/sched/core.c:5378 [inline]
__schedule+0xf43/0x5890 kernel/sched/core.c:6765
__schedule_loop kernel/sched/core.c:6842 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6857
schedule_timeout+0x244/0x280 kernel/time/sleep_timeout.c:75
do_wait_for_common kernel/sched/completion.c:95 [inline]
__wait_for_common+0x3e1/0x600 kernel/sched/completion.c:116
__debugfs_file_removed fs/debugfs/inode.c:775 [inline]
remove_one+0x30f/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+0x143/0x4d0 drivers/net/netdevsim/dev.c:1664
nsim_dev_reload_down+0x6e/0xd0 drivers/net/netdevsim/dev.c:968
devlink_reload+0x19a/0x7c0 net/devlink/dev.c:461
devlink_pernet_pre_exit+0x1a1/0x2b0 net/devlink/core.c:509
ops_pre_exit_list net/core/net_namespace.c:162 [inline]
cleanup_net+0x497/0xb30 net/core/net_namespace.c:632
process_one_work+0x9c5/0x1ba0 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
INFO: task syz.3.1094:9883 blocked for more than 143 seconds.
Not tainted 6.14.0-rc4-syzkaller-00015-g2a1944bff549 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.1094 state:D stack:28416 pid:9883 tgid:9876 ppid:5844 task_flags:0x400140 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5378 [inline]
__schedule+0xf43/0x5890 kernel/sched/core.c:6765
__schedule_loop kernel/sched/core.c:6842 [inline]
schedule+0xe7/0x350 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+0x6bd/0xb10 kernel/locking/mutex.c:730
devlink_health_report+0x3c5/0x9d0 net/devlink/health.c:627
nsim_dev_health_break_write+0x167/0x210 drivers/net/netdevsim/health.c:162
full_proxy_write+0x13c/0x200 fs/debugfs/file.c:398
vfs_write+0x24c/0x1150 fs/read_write.c:677
ksys_write+0x12b/0x250 fs/read_write.c:731
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: 0033:0x7fda3bd8d169
RSP: 002b:00007fda3cc00038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fda3bfa6080 RCX: 00007fda3bd8d169
RDX: 00000000000000ef RSI: 0000000000000000 RDI: 0000000000000002
RBP: 00007fda3be0e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fda3bfa6080 R15: 00007fff9b30b578
INFO: task syz.4.1057:9894 blocked for more than 144 seconds.
Not tainted 6.14.0-rc4-syzkaller-00015-g2a1944bff549 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.1057 state:D stack:28656 pid:9894 tgid:9890 ppid:9760 task_flags:0x400040 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5378 [inline]
__schedule+0xf43/0x5890 kernel/sched/core.c:6765
__schedule_loop kernel/sched/core.c:6842 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6857
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6914
rwsem_down_read_slowpath+0x61e/0xb20 kernel/locking/rwsem.c:1084
__down_read_common kernel/locking/rwsem.c:1248 [inline]
__down_read kernel/locking/rwsem.c:1261 [inline]
down_read+0x124/0x330 kernel/locking/rwsem.c:1526
inode_lock_shared include/linux/fs.h:887 [inline]
open_last_lookups fs/namei.c:3749 [inline]
path_openat+0x88a/0x2d80 fs/namei.c:3986
do_filp_open+0x20c/0x470 fs/namei.c:4016
do_sys_openat2+0x17a/0x1e0 fs/open.c:1428
do_sys_open fs/open.c:1443 [inline]
__do_sys_openat fs/open.c:1459 [inline]
__se_sys_openat fs/open.c:1454 [inline]
__x64_sys_openat+0x175/0x210 fs/open.c:1454
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: 0033:0x7fb54218d169
RSP: 002b:00007fb542f90038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fb5423a6080 RCX: 00007fb54218d169
RDX: 0000000000000101 RSI: 00004000000000c0 RDI: ffffffffffffff9c
RBP: 00007fb54220e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007fb5423a6080 R15: 00007ffd8dce9e58
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff8e1bcc80 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8e1bcc80 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8e1bcc80 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x7f/0x390 kernel/locking/lockdep.c:6746
6 locks held by kworker/u8:9/1319:
#0: ffff88801bef5948 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x1293/0x1ba0 kernel/workqueue.c:3211
#1: ffffc900045e7d18 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x921/0x1ba0 kernel/workqueue.c:3212
#2: ffffffff8fee3250 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0xca/0xb30 net/core/net_namespace.c:606
#3: ffff8880692db0e8 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1030 [inline]
#3: ffff8880692db0e8 (&dev->mutex){....}-{4:4}, at: devl_dev_lock net/devlink/devl_internal.h:108 [inline]
#3: ffff8880692db0e8 (&dev->mutex){....}-{4:4}, at: devlink_pernet_pre_exit+0x12d/0x2b0 net/devlink/core.c:506
#4: ffff8880692dc250 (&devlink->lock_key#3){+.+.}-{4:4}, at: devl_lock net/devlink/core.c:276 [inline]
#4: ffff8880692dc250 (&devlink->lock_key#3){+.+.}-{4:4}, at: devl_dev_lock net/devlink/devl_internal.h:109 [inline]
#4: ffff8880692dc250 (&devlink->lock_key#3){+.+.}-{4:4}, at: devlink_pernet_pre_exit+0x137/0x2b0 net/devlink/core.c:506
#5: ffff88807aefaa08 (&sb->s_type->i_mutex_key#3){++++}-{4:4}, at: inode_lock include/linux/fs.h:877 [inline]
#5: ffff88807aefaa08 (&sb->s_type->i_mutex_key#3){++++}-{4:4}, at: simple_recursive_removal+0x2f5/0x8e0 fs/libfs.c:627
3 locks held by syz.3.1094/9883:
#0: ffff888065d410b8 (&f->f_pos_lock){+.+.}-{4:4}, at: fdget_pos+0x267/0x390 fs/file.c:1192
#1: ffff888141ada420 (sb_writers#9){.+.+}-{0:0}, at: ksys_write+0x12b/0x250 fs/read_write.c:731
#2: ffff8880692dc250 (&devlink->lock_key#3){+.+.}-{4:4}, at: devlink_health_report+0x3c5/0x9d0 net/devlink/health.c:627
2 locks held by syz.4.1057/9894:
#0: ffff888141ada420 (sb_writers#9){.+.+}-{0:0}, at: open_last_lookups fs/namei.c:3739 [inline]
#0: ffff888141ada420 (sb_writers#9){.+.+}-{0:0}, at: path_openat+0x1f64/0x2d80 fs/namei.c:3986
#1: ffff88807aefaa08 (&sb->s_type->i_mutex_key#3){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:887 [inline]
#1: ffff88807aefaa08 (&sb->s_type->i_mutex_key#3){++++}-{4:4}, at: open_last_lookups fs/namei.c:3749 [inline]
#1: ffff88807aefaa08 (&sb->s_type->i_mutex_key#3){++++}-{4:4}, at: path_openat+0x88a/0x2d80 fs/namei.c:3986
2 locks held by getty/12707:
#0: ffff8880319eb0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc900102332f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0xfba/0x1480 drivers/tty/n_tty.c:2211
1 lock held by syz.6.1793/12856:
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.14.0-rc4-syzkaller-00015-g2a1944bff549 #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+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: 10580 Comm: kworker/u8:24 Not tainted 6.14.0-rc4-syzkaller-00015-g2a1944bff549 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue: events_unbound cfg80211_wiphy_work
RIP: 0010:preempt_latency_start kernel/sched/core.c:5840 [inline]
RIP: 0010:preempt_latency_start kernel/sched/core.c:5835 [inline]
RIP: 0010:preempt_count_add+0x9e/0x150 kernel/sched/core.c:5863
Code: 0e 00 85 c0 75 38 65 48 8b 2d ce 8f 7b 7e 48 8d bd d8 14 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 <0f> 85 87 00 00 00 48 89 9d d8 14 00 00 5b 5d c3 cc cc cc cc 31 ff
RSP: 0018:ffffc9000c1f6e40 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: ffffffff816929e1 RCX: 1ffffffff3517314
RDX: 1ffff11004ce9ddb RSI: ffffffff812ba28a RDI: ffff88802674eed8
RBP: ffff88802674da00 R08: ffffc9000c1f6efc R09: ffffffff90f4572a
R10: ffffc9000c1f6ec8 R11: 0000000000005ec3 R12: ffffffff81a59ae0
R13: ffffc9000c1f6ec8 R14: 0000000000000000 R15: ffff88802674da00
FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fffa4fddfe8 CR3: 0000000039ccc000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
unwind_next_frame+0xb1/0x20c0 arch/x86/kernel/unwind_orc.c:479
arch_stack_walk+0x95/0x100 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x95/0xd0 kernel/stacktrace.c:122
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
__kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:394
kasan_kmalloc include/linux/kasan.h:260 [inline]
__do_kmalloc_node mm/slub.c:4294 [inline]
__kmalloc_noprof+0x21c/0x510 mm/slub.c:4306
kmalloc_noprof include/linux/slab.h:905 [inline]
kzalloc_noprof include/linux/slab.h:1037 [inline]
cfg80211_inform_single_bss_data+0x543/0x1df0 net/wireless/scan.c:2339
cfg80211_inform_bss_data+0x205/0x3ba0 net/wireless/scan.c:3222
cfg80211_inform_bss_frame_data+0x272/0x7a0 net/wireless/scan.c:3317
ieee80211_bss_info_update+0x311/0xab0 net/mac80211/scan.c:226
ieee80211_rx_bss_info net/mac80211/ibss.c:1102 [inline]
ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1581 [inline]
ieee80211_ibss_rx_queued_mgmt+0x189c/0x2f50 net/mac80211/ibss.c:1608
ieee80211_iface_process_skb net/mac80211/iface.c:1611 [inline]
ieee80211_iface_work+0xc15/0xf50 net/mac80211/iface.c:1665
cfg80211_wiphy_work+0x3ed/0x570 net/wireless/core.c:435
process_one_work+0x9c5/0x1ba0 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