syzbot

INFO: task syz-executor.4:5085 blocked for more than 143 seconds.
      Not tainted 6.9.0-rc5-syzkaller-00296-g5eb4573ea63d #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4  state:D stack:22608 pid:5085  tgid:5085  ppid:1      flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5409 [inline]
 __schedule+0xf15/0x5d00 kernel/sched/core.c:6746
 __schedule_loop kernel/sched/core.c:6823 [inline]
 schedule+0xe7/0x350 kernel/sched/core.c:6838
 bit_wait+0x15/0xe0 kernel/sched/wait_bit.c:199
 __wait_on_bit+0x62/0x180 kernel/sched/wait_bit.c:49
 out_of_line_wait_on_bit+0xda/0x110 kernel/sched/wait_bit.c:64
 wait_on_bit include/linux/wait_bit.h:76 [inline]
 wait_on_bit include/linux/wait_bit.h:71 [inline]
 gfs2_glock_wait+0xe7/0x330 fs/gfs2/glock.c:1354
 gfs2_glock_nq+0x946/0x1cd0 fs/gfs2/glock.c:1616
 gfs2_glock_nq_init fs/gfs2/glock.h:238 [inline]
 __gfs2_lookup+0x111/0x290 fs/gfs2/inode.c:905
 __lookup_slow+0x24f/0x460 fs/namei.c:1692
 lookup_slow fs/namei.c:1709 [inline]
 walk_component+0x350/0x5b0 fs/namei.c:2004
 lookup_last fs/namei.c:2461 [inline]
 path_lookupat+0x17f/0x770 fs/namei.c:2485
 filename_lookup+0x1e5/0x5b0 fs/namei.c:2514
 user_path_at_empty+0x42/0x60 fs/namei.c:2921
 user_path_at include/linux/namei.h:57 [inline]
 ksys_umount fs/namespace.c:1916 [inline]
 __do_sys_umount fs/namespace.c:1924 [inline]
 __se_sys_umount fs/namespace.c:1922 [inline]
 __x64_sys_umount+0x10e/0x1a0 fs/namespace.c:1922
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcf/0x260 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f91e147f1d7
RSP: 002b:00007ffeff6f7628 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: ffffffffffffffda RBX: 00007f91e14c93b9 RCX: 00007f91e147f1d7
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffeff6f76e0
RBP: 00007ffeff6f76e0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffeff6f87d0
R13: 00007f91e14c93b9 R14: 000055556d37b430 R15: 0000000000000008
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/29:
 #0: ffffffff8d7b0e20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline]
 #0: ffffffff8d7b0e20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:781 [inline]
 #0: ffffffff8d7b0e20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6614
2 locks held by getty/4828:
 #0: ffff88807d1300a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
 #1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc8/0x1490 drivers/tty/n_tty.c:2201
1 lock held by syz-executor.4/5085:
 #0: ffff88805c8b1c30 (&type->i_mutex_dir_key#9){.+.+}-{3:3}, at: inode_lock_shared include/linux/fs.h:805 [inline]
 #0: ffff88805c8b1c30 (&type->i_mutex_dir_key#9){.+.+}-{3:3}, at: lookup_slow fs/namei.c:1708 [inline]
 #0: ffff88805c8b1c30 (&type->i_mutex_dir_key#9){.+.+}-{3:3}, at: walk_component+0x342/0x5b0 fs/namei.c:2004

=============================================

NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.9.0-rc5-syzkaller-00296-g5eb4573ea63d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114
 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:160 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
 watchdog+0xf86/0x1240 kernel/hung_task.c:380
 kthread+0x2c1/0x3a0 kernel/kthread.c:388
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 1039 Comm: kworker/u8:6 Not tainted 6.9.0-rc5-syzkaller-00296-g5eb4573ea63d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Workqueue: events_unbound cfg80211_wiphy_work
RIP: 0010:kfence_guarded_alloc mm/kfence/core.c:404 [inline]
RIP: 0010:__kfence_alloc+0x512/0x1740 mm/kfence/core.c:1112
Code: cc e8 42 70 a4 ff e8 bd 7d 14 03 48 c7 c7 e0 a1 95 8d 0f b6 c0 c1 e8 07 41 89 c6 e8 c8 c9 f5 08 49 89 c4 48 8b 05 0e 50 ac 0b <48> 3d 40 a2 95 8d 0f 84 de 05 00 00 e8 0d 70 a4 ff 48 8b 1d f6 4f
RSP: 0018:ffffc90003d9f4a0 EFLAGS: 00000096
RAX: ffff88823ffd20a8 RBX: 0000000000000000 RCX: ffffffff816c538d
RDX: 1ffffffff1b2b43e RSI: 0000000000000004 RDI: ffffc90003d9f410
RBP: 000000002adc1348 R08: 0000000000000001 R09: fffff520007b3e82
R10: 0000000000000003 R11: 0000000000000003 R12: 0000000000000246
R13: 00000000923e205a R14: 0000000000000000 R15: 00000000ff000000
FS:  0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005599beeaa680 CR3: 000000000d57a000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 kfence_alloc include/linux/kfence.h:129 [inline]
 slab_alloc_node mm/slub.c:3831 [inline]
 __do_kmalloc_node mm/slub.c:3965 [inline]
 __kmalloc+0x295/0x440 mm/slub.c:3979
 kmalloc include/linux/slab.h:632 [inline]
 kzalloc include/linux/slab.h:749 [inline]
 ieee802_11_parse_elems_full+0xea/0x15d0 net/mac80211/parse.c:880
 ieee802_11_parse_elems_crc net/mac80211/ieee80211_i.h:2325 [inline]
 ieee802_11_parse_elems net/mac80211/ieee80211_i.h:2332 [inline]
 ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1574 [inline]
 ieee80211_ibss_rx_queued_mgmt+0xc4f/0x2f40 net/mac80211/ibss.c:1605
 ieee80211_iface_process_skb net/mac80211/iface.c:1605 [inline]
 ieee80211_iface_work+0xc07/0xf00 net/mac80211/iface.c:1659
 cfg80211_wiphy_work+0x255/0x330 net/wireless/core.c:437
 process_one_work+0x9a9/0x1ac0 kernel/workqueue.c:3254
 process_scheduled_works kernel/workqueue.c:3335 [inline]
 worker_thread+0x6c8/0xf70 kernel/workqueue.c:3416
 kthread+0x2c1/0x3a0 kernel/kthread.c:388
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>