INFO: task syz.5.138:5011 blocked for more than 143 seconds.
Not tainted 5.15.187-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.5.138 state:D stack:25104 pid: 5011 ppid: 4409 flags:0x00004004
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5030 [inline]
__schedule+0x11b8/0x43b0 kernel/sched/core.c:6376
schedule+0x11b/0x1e0 kernel/sched/core.c:6459
io_schedule+0x7c/0xd0 kernel/sched/core.c:8484
wait_on_page_bit_common+0x815/0xe00 mm/filemap.c:1356
lock_page include/linux/pagemap.h:625 [inline]
release_metapage+0x11f/0xe10 fs/jfs/jfs_metapage.c:736
discard_metapage fs/jfs/jfs_metapage.h:88 [inline]
__get_metapage+0xbeb/0x1060 fs/jfs/jfs_metapage.c:645
dtSearch+0x5d5/0x2050 fs/jfs/jfs_dtree.c:624
jfs_lookup+0x152/0x380 fs/jfs/namei.c:1459
__lookup_slow+0x27d/0x3d0 fs/namei.c:1663
lookup_slow+0x53/0x70 fs/namei.c:1680
walk_component+0x319/0x460 fs/namei.c:1976
lookup_last fs/namei.c:2431 [inline]
path_lookupat+0x169/0x440 fs/namei.c:2455
filename_lookup+0x1e2/0x4f0 fs/namei.c:2484
user_path_at_empty+0x40/0x190 fs/namei.c:2883
user_path_at include/linux/namei.h:57 [inline]
__do_sys_chdir fs/open.c:490 [inline]
__se_sys_chdir+0x91/0x280 fs/open.c:484
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fe829ed2929
RSP: 002b:00007fe827d3a038 EFLAGS: 00000246 ORIG_RAX: 0000000000000050
RAX: ffffffffffffffda RBX: 00007fe82a0f9fa0 RCX: 00007fe829ed2929
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000a40
RBP: 00007fe829f54b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fe82a0f9fa0 R15: 00007ffe53708a78
</TASK>
Showing all locks held in the system:
3 locks held by kworker/0:0/7:
#0: ffff8880b903a318 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x26/0x140 kernel/sched/core.c:475
#1: ffff8880b9027848 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x4d6/0x810 kernel/sched/psi.c:891
#2: ffffffff8c120d68 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:322 [inline]
#2: ffffffff8c120d68 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x320/0x6b0 kernel/rcu/tree_exp.h:845
1 lock held by khungtaskd/27:
#0: ffffffff8c11c2e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by getty/3947:
#0: ffff88802c3a2098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252
#1: ffffc90002cf62e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x5ba/0x1a30 drivers/tty/n_tty.c:2158
5 locks held by kworker/1:14/4620:
#0: ffff88801b9c2d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x760/0x1000 kernel/workqueue.c:-1
#1: ffffc90003e0fd00 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x7a3/0x1000 kernel/workqueue.c:2285
#2: ffff888147e8f220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline]
#2: ffff888147e8f220 (&dev->mutex){....}-{3:3}, at: hub_event+0x18f/0x4fa0 drivers/usb/core/hub.c:5781
#3: ffff88807b3ab220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline]
#3: ffff88807b3ab220 (&dev->mutex){....}-{3:3}, at: __device_attach+0x85/0x460 drivers/base/dd.c:954
#4: ffff8880514541a8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline]
#4: ffff8880514541a8 (&dev->mutex){....}-{3:3}, at: __device_attach+0x85/0x460 drivers/base/dd.c:954
1 lock held by syz.5.138/5011:
#0: ffff888072be9800 (&type->i_mutex_dir_key#12){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:797 [inline]
#0: ffff888072be9800 (&type->i_mutex_dir_key#12){++++}-{3:3}, at: lookup_slow+0x46/0x70 fs/namei.c:1679
2 locks held by syz.1.637/7100:
#0: ffff88802033a118 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xf9/0x7d0 block/bdev.c:915
#1: ffff8880202ef468 (&lo->lo_mutex){+.+.}-{3:3}, at: lo_release+0x4d/0x1f0 drivers/block/loop.c:2071
2 locks held by syz.4.638/7103:
#0: ffff88802033e118 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xf9/0x7d0 block/bdev.c:915
#1: ffff888020488468 (&lo->lo_mutex){+.+.}-{3:3}, at: lo_release+0x4d/0x1f0 drivers/block/loop.c:2071
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.15.187-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
<TASK>
dump_stack_lvl+0x168/0x230 lib/dump_stack.c:106
nmi_cpu_backtrace+0x397/0x3d0 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
</TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 4962 Comm: kworker/u4:9 Not tainted 5.15.187-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: bat_events batadv_nc_worker
RIP: 0010:trace_irq_enable_rcuidle+0x1a/0x180 include/trace/events/preemptirq.h:40
Code: 2b 08 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 55 41 57 41 56 41 54 53 48 89 f3 49 89 fe e8 5d e1 f9 ff 66 90 e8 56 e1 f9 ff <5b> 41 5c 41 5e 41 5f 5d c3 65 44 8b 3d 7d 23 84 7e bf 07 00 00 00
RSP: 0018:ffffc900033bfa60 EFLAGS: 00000093
RAX: ffffffff817df1ca RBX: 0000000000000000 RCX: ffff88802c120000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff814871ba
RBP: ffffc900033bfb38 R08: dffffc0000000000 R09: ffffed100ed97a61
R10: ffffed100ed97a61 R11: 1ffff1100ed97a60 R12: ffffffff897f5eb6
R13: dffffc0000000000 R14: ffffffff814871ba R15: 1ffff92000677f54
FS: 0000000000000000(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c41eb2e CR3: 000000002a70c000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
trace_hardirqs_on+0x57/0x80 kernel/trace/trace_preemptirq.c:44
__local_bh_enable_ip+0x12a/0x1b0 kernel/softirq.c:406
spin_unlock_bh include/linux/spinlock.h:408 [inline]
batadv_nc_purge_paths+0x316/0x3b0 net/batman-adv/network-coding.c:475
batadv_nc_worker+0x327/0x5c0 net/batman-adv/network-coding.c:726
process_one_work+0x863/0x1000 kernel/workqueue.c:2310
worker_thread+0xaa8/0x12a0 kernel/workqueue.c:2457
kthread+0x436/0x520 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
</TASK>