INFO: task syz-executor.2:17170 blocked for more than 143 seconds.
Not tainted 6.6.0-rc2-syzkaller-00018-g2cf0f7156238 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:26896 pid:17170 ppid:5091 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0xee1/0x5a10 kernel/sched/core.c:6695
schedule+0xe7/0x1b0 kernel/sched/core.c:6771
io_schedule+0xbe/0x130 kernel/sched/core.c:9026
folio_wait_bit_common+0x3dc/0x9c0 mm/filemap.c:1301
folio_lock include/linux/pagemap.h:1042 [inline]
clean_bdev_aliases+0x56b/0x610 fs/buffer.c:1725
clean_bdev_bh_alias include/linux/buffer_head.h:222 [inline]
__block_write_begin_int+0x8d6/0x1470 fs/buffer.c:2115
iomap_write_begin+0x5be/0x17b0 fs/iomap/buffered-io.c:772
iomap_write_iter fs/iomap/buffered-io.c:907 [inline]
iomap_file_buffered_write+0x3d6/0x9a0 fs/iomap/buffered-io.c:968
blkdev_buffered_write block/fops.c:634 [inline]
blkdev_write_iter+0x4f5/0xc90 block/fops.c:684
call_write_iter include/linux/fs.h:1985 [inline]
do_iter_readv_writev+0x21e/0x3c0 fs/read_write.c:735
do_iter_write+0x17f/0x830 fs/read_write.c:860
vfs_iter_write+0x7a/0xb0 fs/read_write.c:901
iter_file_splice_write+0x698/0xbf0 fs/splice.c:736
do_splice_from fs/splice.c:933 [inline]
direct_splice_actor+0x118/0x180 fs/splice.c:1142
splice_direct_to_actor+0x347/0xa30 fs/splice.c:1088
do_splice_direct+0x1af/0x280 fs/splice.c:1194
do_sendfile+0xb88/0x1390 fs/read_write.c:1254
__do_sys_sendfile64 fs/read_write.c:1322 [inline]
__se_sys_sendfile64 fs/read_write.c:1308 [inline]
__x64_sys_sendfile64+0x1d6/0x220 fs/read_write.c:1308
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f645e07cae9
RSP: 002b:00007f645eea70c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f645e19bf80 RCX: 00007f645e07cae9
RDX: 0000000000000000 RSI: 0000000000000007 RDI: 0000000000000003
RBP: 00007f645e0c847a R08: 0000000000000000 R09: 0000000000000000
R10: 0100000000000042 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f645e19bf80 R15: 00007f645e2bfa48
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffffffff8cbab2e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:303 [inline]
#0: ffffffff8cbab2e0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:749 [inline]
#0: ffffffff8cbab2e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6613
2 locks held by getty/4803:
#0: ffff88814a7340a0 (&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+0xfc5/0x1480 drivers/tty/n_tty.c:2206
4 locks held by syz-executor.0/5089:
3 locks held by syz-executor.3/5094:
#0: ffff8880b983c718 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:566 [inline]
#0: ffff8880b983c718 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x7e/0x130 kernel/sched/core.c:551
#1: ffff8880b9828888 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x2d9/0x900 kernel/sched/psi.c:999
#2: ffff88802886dcd8 (&cfs_rq->removed.lock){-.-.}-{2:2}, at: update_cfs_rq_load_avg kernel/sched/fair.c:4319 [inline]
#2: ffff88802886dcd8 (&cfs_rq->removed.lock){-.-.}-{2:2}, at: update_load_avg+0xc35/0x1b10 kernel/sched/fair.c:4478
6 locks held by kworker/0:6/5143:
#0: ffff88801826ad38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x787/0x15c0 kernel/workqueue.c:2605
#1: ffffc90004e9fd80 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x7e9/0x15c0 kernel/workqueue.c:2606
#2: ffff888020985190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline]
#2: ffff888020985190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1c1/0x4e00 drivers/usb/core/hub.c:5768
#3: ffff8880209e0508 (&port_dev->status_lock){+.+.}-{3:3}, at: usb_lock_port drivers/usb/core/hub.c:3138 [inline]
#3: ffff8880209e0508 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect drivers/usb/core/hub.c:5337 [inline]
#3: ffff8880209e0508 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect_change drivers/usb/core/hub.c:5580 [inline]
#3: ffff8880209e0508 (&port_dev->status_lock){+.+.}-{3:3}, at: port_event drivers/usb/core/hub.c:5740 [inline]
#3: ffff8880209e0508 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_event+0x2801/0x4e00 drivers/usb/core/hub.c:5822
#4: ffff88801c558568 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_port_connect drivers/usb/core/hub.c:5338 [inline]
#4: ffff88801c558568 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_port_connect_change drivers/usb/core/hub.c:5580 [inline]
#4: ffff88801c558568 (hcd->address0_mutex){+.+.}-{3:3}, at: port_event drivers/usb/core/hub.c:5740 [inline]
#4: ffff88801c558568 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_event+0x282a/0x4e00 drivers/usb/core/hub.c:5822
#5: ffffffff8dcdccb0 (ehci_cf_port_reset_rwsem){.+.+}-{3:3}, at: hub_port_reset+0x1a2/0x1c70 drivers/usb/core/hub.c:2953
6 locks held by kworker/0:12/10833:
#0: ffff88801826ad38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x787/0x15c0 kernel/workqueue.c:2605
#1: ffffc900031cfd80 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x7e9/0x15c0 kernel/workqueue.c:2606
#2: ffff88814276d190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline]
#2: ffff88814276d190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1c1/0x4e00 drivers/usb/core/hub.c:5768
#3: ffff888020940508 (&port_dev->status_lock){+.+.}-{3:3}, at: usb_lock_port drivers/usb/core/hub.c:3138 [inline]
#3: ffff888020940508 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect drivers/usb/core/hub.c:5337 [inline]
#3: ffff888020940508 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect_change drivers/usb/core/hub.c:5580 [inline]
#3: ffff888020940508 (&port_dev->status_lock){+.+.}-{3:3}, at: port_event drivers/usb/core/hub.c:5740 [inline]
#3: ffff888020940508 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_event+0x2801/0x4e00 drivers/usb/core/hub.c:5822
#4: ffff888142793a68 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_port_connect drivers/usb/core/hub.c:5338 [inline]
#4: ffff888142793a68 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_port_connect_change drivers/usb/core/hub.c:5580 [inline]
#4: ffff888142793a68 (hcd->address0_mutex){+.+.}-{3:3}, at: port_event drivers/usb/core/hub.c:5740 [inline]
#4: ffff888142793a68 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_event+0x282a/0x4e00 drivers/usb/core/hub.c:5822
#5: ffffffff8dcdccb0 (ehci_cf_port_reset_rwsem){.+.+}-{3:3}, at: hub_port_reset+0x1a2/0x1c70 drivers/usb/core/hub.c:2953
2 locks held by kworker/0:1/17306:
#0: ffff888012c72938 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x787/0x15c0 kernel/workqueue.c:2605
#1: ffffc90014cefd80 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x7e9/0x15c0 kernel/workqueue.c:2606
2 locks held by kworker/u4:14/18232:
2 locks held by syz-executor.4/19946:
#0: ffffffff8e26be48 (capi_controller_lock){+.+.}-{3:3}, at: capi20_release+0x2c/0x370 drivers/isdn/capi/kcapi.c:616
#1: ffffffff8cbb6bb8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:293 [inline]
#1: ffffffff8cbb6bb8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x69e/0x7e0 kernel/rcu/tree_exp.h:992
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.6.0-rc2-syzkaller-00018-g2cf0f7156238 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x277/0x380 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x299/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
watchdog+0xf87/0x1210 kernel/hung_task.c:379
kthread+0x33c/0x440 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 18232 Comm: kworker/u4:14 Not tainted 6.6.0-rc2-syzkaller-00018-g2cf0f7156238 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023
Workqueue: bat_events batadv_nc_worker
RIP: 0010:check_preemption_disabled+0x2/0xe0 lib/smp_processor_id.c:13
Code: 90 04 85 c0 74 18 65 8b 05 2b 3a c4 75 85 c0 75 0d 65 8b 05 3c 37 c4 75 85 c0 74 02 0f 0b e9 85 fc ff ff 0f 1f 44 00 00 41 54 <55> 53 48 83 ec 08 65 8b 1d 0d 6d c5 75 65 8b 05 02 6d c5 75 a9 ff
RSP: 0018:ffffc900059d7af8 EFLAGS: 00000046
RAX: dffffc0000000000 RBX: ffff88801f58bb80 RCX: 1ffffffff1d9c111
RDX: 1ffff11003eb18c4 RSI: ffffffff8a8cade0 RDI: ffffffff8ae92be0
RBP: 17d166cd047469b5 R08: 0000000000000000 R09: 0000000000000001
R10: ffffffff8ece3a17 R11: 0000000000000000 R12: ffffffff8a07f340
R13: ffff88807daf4c80 R14: ffff8880266709c0 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8202ebec7c CR3: 00000000218f3000 CR4: 00000000003506f0
Call Trace:
lockdep_recursion_inc kernel/locking/lockdep.c:462 [inline]
lockdep_hardirqs_on_prepare kernel/locking/lockdep.c:4357 [inline]
lockdep_hardirqs_on_prepare+0x11c/0x410 kernel/locking/lockdep.c:4310
trace_hardirqs_on+0x36/0x40 kernel/trace/trace_preemptirq.c:61
__local_bh_enable_ip+0xa4/0x120 kernel/softirq.c:386
spin_unlock_bh include/linux/spinlock.h:396 [inline]
batadv_nc_purge_paths+0x1ce/0x3c0 net/batman-adv/network-coding.c:471
batadv_nc_worker+0x97a/0x10e0 net/batman-adv/network-coding.c:720
process_one_work+0x884/0x15c0 kernel/workqueue.c:2630
process_scheduled_works kernel/workqueue.c:2703 [inline]
worker_thread+0x8b9/0x1290 kernel/workqueue.c:2784
kthread+0x33c/0x440 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304