INFO: task syz-executor.4:5294 blocked for more than 143 seconds.
Not tainted 6.9.0-rc4-syzkaller-00214-g13a2e429f644 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:27288 pid:5294 tgid:5229 ppid:5109 flags:0x00000006
Call Trace:
context_switch kernel/sched/core.c:5409 [inline]
__schedule+0x17e8/0x4a50 kernel/sched/core.c:6746
__schedule_loop kernel/sched/core.c:6823 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6838
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6895
__mutex_lock_common kernel/locking/mutex.c:684 [inline]
__mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752
bfs_lookup+0x139/0x270 fs/bfs/dir.c:136
__lookup_slow+0x28e/0x3f0 fs/namei.c:1692
lookup_slow+0x53/0x70 fs/namei.c:1709
walk_component fs/namei.c:2004 [inline]
link_path_walk+0x9ea/0xea0 fs/namei.c:2331
path_parentat fs/namei.c:2532 [inline]
__filename_parentat+0x263/0x6f0 fs/namei.c:2556
filename_parentat fs/namei.c:2574 [inline]
filename_create+0xf6/0x540 fs/namei.c:3873
do_mkdirat+0xbd/0x3a0 fs/namei.c:4138
__do_sys_mkdirat fs/namei.c:4161 [inline]
__se_sys_mkdirat fs/namei.c:4159 [inline]
__x64_sys_mkdirat+0x89/0xa0 fs/namei.c:4159
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f130ca7dea9
RSP: 002b:00007f130d81c0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007f130cbac120 RCX: 00007f130ca7dea9
RDX: 00000000000001ff RSI: 0000000020000000 RDI: ffffffffffffff9c
RBP: 00007f130caca4a4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f130cbac120 R15: 00007ffe8a460d28
INFO: task syz-executor.4:5299 blocked for more than 144 seconds.
Not tainted 6.9.0-rc4-syzkaller-00214-g13a2e429f644 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:26680 pid:5299 tgid:5229 ppid:5109 flags:0x00000006
Call Trace:
context_switch kernel/sched/core.c:5409 [inline]
__schedule+0x17e8/0x4a50 kernel/sched/core.c:6746
__schedule_loop kernel/sched/core.c:6823 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6838
d_wait_lookup fs/dcache.c:2449 [inline]
d_alloc_parallel+0xc19/0x1600 fs/dcache.c:2531
__lookup_slow+0x117/0x3f0 fs/namei.c:1677
lookup_slow+0x53/0x70 fs/namei.c:1709
walk_component fs/namei.c:2004 [inline]
link_path_walk+0x9ea/0xea0 fs/namei.c:2331
path_lookupat+0xa9/0x450 fs/namei.c:2484
do_o_path+0x95/0x230 fs/namei.c:3770
path_openat+0x2aa0/0x3240 fs/namei.c:3792
do_filp_open+0x235/0x490 fs/namei.c:3826
do_sys_openat2+0x13e/0x1d0 fs/open.c:1406
do_sys_open fs/open.c:1421 [inline]
__do_sys_openat fs/open.c:1437 [inline]
__se_sys_openat fs/open.c:1432 [inline]
__x64_sys_openat+0x247/0x2a0 fs/open.c:1432
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f130ca7dea9
RSP: 002b:00007f130d7fb0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f130cbac1f0 RCX: 00007f130ca7dea9
RDX: 0000000000200002 RSI: 0000000020000000 RDI: ffffffffffffff9c
RBP: 00007f130caca4a4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f130cbac1f0 R15: 00007ffe8a460d28
Showing all locks held in the system:
3 locks held by kworker/0:1/8:
#0: ffff888015078948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3229 [inline]
#0: ffff888015078948 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x8e0/0x17c0 kernel/workqueue.c:3335
#1: ffffc900000d7d00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3230 [inline]
#1: ffffc900000d7d00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_scheduled_works+0x91b/0x17c0 kernel/workqueue.c:3335
#2: ffffffff8f5a5348 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xe/0x60 net/core/link_watch.c:276
2 locks held by kworker/u8:1/11:
1 lock held by khungtaskd/29:
#0: ffffffff8e334d20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline]
#0: ffffffff8e334d20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:781 [inline]
#0: ffffffff8e334d20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614
4 locks held by kworker/u8:3/50:
#0: ffff888015ecd948 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3229 [inline]
#0: ffff888015ecd948 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x8e0/0x17c0 kernel/workqueue.c:3335
#1: ffffc90000ba7d00 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3230 [inline]
#1: ffffc90000ba7d00 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x91b/0x17c0 kernel/workqueue.c:3335
#2: ffffffff8f598c50 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x16a/0xcc0 net/core/net_namespace.c:591
#3: ffffffff8f5a5348 (rtnl_mutex){+.+.}-{3:3}, at: wg_netns_pre_exit+0x1f/0x1e0 drivers/net/wireguard/device.c:414
2 locks held by getty/4837:
#0: ffff88802b26d0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900031332f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b5/0x1e10 drivers/tty/n_tty.c:2201
2 locks held by syz-executor.4/5234:
2 locks held by syz-executor.4/5292:
2 locks held by syz-executor.4/5294:
#0: ffff88805e4a4168 (&type->i_mutex_dir_key#9){.+.+}-{3:3}, at: inode_lock_shared include/linux/fs.h:805 [inline]
#0: ffff88805e4a4168 (&type->i_mutex_dir_key#9){.+.+}-{3:3}, at: lookup_slow+0x45/0x70 fs/namei.c:1708
#1: ffff88801eb23ad8 (&info->bfs_lock){+.+.}-{3:3}, at: bfs_lookup+0x139/0x270 fs/bfs/dir.c:136
1 lock held by syz-executor.4/5299:
#0: ffff88805e4a4168 (&type->i_mutex_dir_key#9){.+.+}-{3:3}, at: inode_lock_shared include/linux/fs.h:805 [inline]
#0: ffff88805e4a4168 (&type->i_mutex_dir_key#9){.+.+}-{3:3}, at: lookup_slow+0x45/0x70 fs/namei.c:1708
1 lock held by syz-executor.4/5390:
#0: ffffffff8e33a0b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:323 [inline]
#0: ffffffff8e33a0b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x463/0x820 kernel/rcu/tree_exp.h:939
2 locks held by syz-executor.2/6483:
2 locks held by syz-executor.2/6534:
2 locks held by syz-executor.2/6535:
#0: ffff8880605d0168 (&type->i_mutex_dir_key#9){.+.+}-{3:3}, at: inode_lock_shared include/linux/fs.h:805 [inline]
#0: ffff8880605d0168 (&type->i_mutex_dir_key#9){.+.+}-{3:3}, at: lookup_slow+0x45/0x70 fs/namei.c:1708
#1: ffff88802cc930d8 (&info->bfs_lock){+.+.}-{3:3}, at: bfs_lookup+0x139/0x270 fs/bfs/dir.c:136
1 lock held by syz-executor.2/6537:
#0: ffff8880605d0168 (&type->i_mutex_dir_key#9){.+.+}-{3:3}, at: inode_lock_shared include/linux/fs.h:805 [inline]
#0: ffff8880605d0168 (&type->i_mutex_dir_key#9){.+.+}-{3:3}, at: lookup_slow+0x45/0x70 fs/namei.c:1708
7 locks held by syz-executor.2/6613:
#0: ffff8880308f4420 (sb_writers#8){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2855 [inline]
#0: ffff8880308f4420 (sb_writers#8){.+.+}-{0:0}, at: vfs_write+0x233/0xcb0 fs/read_write.c:586
#1: ffff88807ea7ac88 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x1eb/0x500 fs/kernfs/file.c:325
#2: ffff88802250da58 (kn->active#50){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x20f/0x500 fs/kernfs/file.c:326
#3: ffffffff8eee2d88 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: del_device_store+0xfc/0x480 drivers/net/netdevsim/bus.c:216
#4: ffff8880202ac0e8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:990 [inline]
#4: ffff8880202ac0e8 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1093 [inline]
#4: ffff8880202ac0e8 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal+0xce/0x7c0 drivers/base/dd.c:1290
#5: ffff88802111a250 (&devlink->lock_key#8){+.+.}-{3:3}, at: nsim_drv_remove+0x50/0x160 drivers/net/netdevsim/dev.c:1672
#6: ffffffff8f5a5348 (rtnl_mutex){+.+.}-{3:3}, at: unregister_netdevice_notifier_net+0x89/0x3a0 net/core/dev.c:1871
1 lock held by syz-executor.1/6669:
#0: ffffffff8f5a5348 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffffffff8f5a5348 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x842/0x10d0 net/core/rtnetlink.c:6592
2 locks held by syz-executor.3/6772:
2 locks held by syz-executor.3/6801:
2 locks held by syz-executor.3/6804:
#0: ffff88805e4a4690 (&type->i_mutex_dir_key#9){.+.+}-{3:3}, at: inode_lock_shared include/linux/fs.h:805 [inline]
#0: ffff88805e4a4690 (&type->i_mutex_dir_key#9){.+.+}-{3:3}, at: lookup_slow+0x45/0x70 fs/namei.c:1708
#1: ffff888055d4a0d8 (&info->bfs_lock){+.+.}-{3:3}, at: bfs_lookup+0x139/0x270 fs/bfs/dir.c:136
1 lock held by syz-executor.3/6806:
#0: ffff88805e4a4690 (&type->i_mutex_dir_key#9){.+.+}-{3:3}, at: inode_lock_shared include/linux/fs.h:805 [inline]
#0: ffff88805e4a4690 (&type->i_mutex_dir_key#9){.+.+}-{3:3}, at: lookup_slow+0x45/0x70 fs/namei.c:1708
1 lock held by syz-executor.5/6784:
#0: ffffffff8f5a5348 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffffffff8f5a5348 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x842/0x10d0 net/core/rtnetlink.c:6592
2 locks held by syz-executor.0/6830:
#0: ffff8880b943e698 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:559
#1: ffff8880b9428948 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x441/0x770 kernel/sched/psi.c:988
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.9.0-rc4-syzkaller-00214-g13a2e429f644 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114
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:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
watchdog+0xfde/0x1020 kernel/hung_task.c:380
kthread+0x2f2/0x390 kernel/kthread.c:388
ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 1057 Comm: kworker/u8:7 Not tainted 6.9.0-rc4-syzkaller-00214-g13a2e429f644 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Workqueue: events_unbound cfg80211_wiphy_work
RIP: 0010:ieee80211_iface_process_skb net/mac80211/iface.c:1484 [inline]
RIP: 0010:ieee80211_iface_work+0x342/0xf10 net/mac80211/iface.c:1659
Code: 85 db 0f 84 89 06 00 00 e8 cb 68 a5 f6 eb 05 e8 c4 68 a5 f6 49 89 ef 49 c1 ef 03 48 b8 00 00 00 00 00 fc ff df 41 0f b6 04 07 <84> c0 0f 85 cb 06 00 00 44 0f b7 65 00 44 89 e3 81 e3 fc 00 00 00
RSP: 0018:ffffc90004307af8 EFLAGS: 00000212
RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffff888022485a00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffff888025716a50 R08: ffffffff8af09888 R09: 1ffffffff25e64ad
R10: dffffc0000000000 R11: fffffbfff25e64ae R12: ffff88802dfb5748
R13: ffff88802dfb5748 R14: ffff88802b088000 R15: 1ffff11004ae2d4a
FS: 0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3d836d56c6 CR3: 000000000e134000 CR4: 0000000000350ef0
Call Trace:
cfg80211_wiphy_work+0x223/0x260 net/wireless/core.c:437
process_one_work kernel/workqueue.c:3254 [inline]
process_scheduled_works+0xa12/0x17c0 kernel/workqueue.c:3335
worker_thread+0x86d/0xd70 kernel/workqueue.c:3416
kthread+0x2f2/0x390 kernel/kthread.c:388
ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244