INFO: task syz-executor.5:26245 blocked for more than 143 seconds.
Not tainted 6.1.0-rc8-syzkaller-01937-g1933ea365aa7 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.5 state:D stack:25040 pid:26245 ppid:1 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5209 [inline]
__schedule+0xae9/0x53f0 kernel/sched/core.c:6521
schedule+0xde/0x1b0 kernel/sched/core.c:6597
schedule_timeout+0x1df/0x2a0 kernel/time/timer.c:1911
do_wait_for_common kernel/sched/completion.c:85 [inline]
__wait_for_common+0x1ce/0x5c0 kernel/sched/completion.c:106
devlink_unregister+0xef/0x5a0 net/core/devlink.c:10133
nsim_drv_remove+0x4a/0x1d0 drivers/net/netdevsim/dev.c:1671
device_remove+0xc8/0x170 drivers/base/dd.c:548
__device_release_driver drivers/base/dd.c:1249 [inline]
device_release_driver_internal+0x4a5/0x700 drivers/base/dd.c:1275
bus_remove_device+0x2e7/0x5a0 drivers/base/bus.c:529
device_del+0x4f7/0xc80 drivers/base/core.c:3704
device_unregister+0x1e/0xc0 drivers/base/core.c:3736
nsim_bus_dev_del drivers/net/netdevsim/bus.c:310 [inline]
del_device_store+0x34e/0x470 drivers/net/netdevsim/bus.c:219
bus_attr_store+0x76/0xa0 drivers/base/bus.c:122
sysfs_kf_write+0x114/0x170 fs/sysfs/file.c:136
kernfs_fop_write_iter+0x3fc/0x610 fs/kernfs/file.c:330
call_write_iter include/linux/fs.h:2199 [inline]
new_sync_write fs/read_write.c:491 [inline]
vfs_write+0x9ed/0xdd0 fs/read_write.c:584
ksys_write+0x12b/0x250 fs/read_write.c:637
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f5453a3de5f
RSP: 002b:00007fffb5e1ea40 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007f5453a3de5f
RDX: 0000000000000001 RSI: 00007fffb5e1ea90 RDI: 0000000000000005
RBP: 0000000000000005 R08: 0000000000000000 R09: 00007fffb5e1e9e0
R10: 0000000000000000 R11: 0000000000000293 R12: 00007f5453ae76fe
R13: 00007fffb5e1ea90 R14: 0000000000000000 R15: 00007fffb5e1f160
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8c58f270 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xc70 kernel/rcu/tasks.h:507
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8c58ef70 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xc70 kernel/rcu/tasks.h:507
1 lock held by khungtaskd/28:
#0: ffffffff8c58fdc0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x57/0x264 kernel/locking/lockdep.c:6494
2 locks held by getty/3310:
#0: ffff8880289f6098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x26/0x80 drivers/tty/tty_ldisc.c:244
#1: ffffc900031262f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xef4/0x13e0 drivers/tty/n_tty.c:2177
3 locks held by kworker/u4:9/3984:
2 locks held by kworker/1:23/18160:
3 locks held by kworker/1:1/23034:
#0: ffff888012064d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888012064d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888012064d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888012064d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
#0: ffff888012064d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
#0: ffff888012064d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x86d/0x1710 kernel/workqueue.c:2260
#1: ffffc9000534fda8 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work+0x8a1/0x1710 kernel/workqueue.c:2264
#2: ffff888022425240 (&data->fib_lock){+.+.}-{3:3}, at: nsim_fib_event_work+0x1d5/0x24a0 drivers/net/netdevsim/fib.c:1489
2 locks held by syz-executor.5/26159:
#0: ffffffff8df54b90 (cb_lock){++++}-{3:3}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1075
#1: ffff88807bb0a338 (&devlink->lock_key#4){+.+.}-{3:3}, at: devl_lock net/core/devlink.c:281 [inline]
#1: ffff88807bb0a338 (&devlink->lock_key#4){+.+.}-{3:3}, at: devlink_nl_pre_doit+0x9d/0x940 net/core/devlink.c:858
5 locks held by syz-executor.5/26245:
#0: ffff888029a02460 (sb_writers#8){.+.+}-{0:0}, at: ksys_write+0x12b/0x250 fs/read_write.c:637
#1: ffff888182bd4888 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x290/0x610 fs/kernfs/file.c:321
#2: ffff8881477e82c0 (kn->active#51){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x2b4/0x610 fs/kernfs/file.c:322
#3: ffffffff8d5a1468 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: del_device_store+0xc9/0x470 drivers/net/netdevsim/bus.c:209
#4: ffff88807cf470e8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline]
#4: ffff88807cf470e8 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1073 [inline]
#4: ffff88807cf470e8 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal+0xa4/0x700 drivers/base/dd.c:1272
4 locks held by syz-executor.5/26259:
#0: ffff888029a02460 (sb_writers#8){.+.+}-{0:0}, at: ksys_write+0x12b/0x250 fs/read_write.c:637
#1: ffff888197918888 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x290/0x610 fs/kernfs/file.c:321
#2: ffff8881477e82c0 (kn->active#51){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x2b4/0x610 fs/kernfs/file.c:322
#3: ffffffff8d5a1468 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: del_device_store+0xc9/0x470 drivers/net/netdevsim/bus.c:209
4 locks held by syz-executor.5/26275:
#0: ffff888029a02460 (sb_writers#8){.+.+}-{0:0}, at: ksys_write+0x12b/0x250 fs/read_write.c:637
#1: ffff888080571c88 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x290/0x610 fs/kernfs/file.c:321
#2: ffff8881477e82c0 (kn->active#51){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x2b4/0x610 fs/kernfs/file.c:322
#3: ffffffff8d5a1468 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: del_device_store+0xc9/0x470 drivers/net/netdevsim/bus.c:209
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.1.0-rc8-syzkaller-01937-g1933ea365aa7 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd1/0x138 lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x24/0x18a lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x333/0x3c0 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline]
watchdog+0xc75/0xfc0 kernel/hung_task.c:377
kthread+0x2e8/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 3984 Comm: kworker/u4:9 Not tainted 6.1.0-rc8-syzkaller-01937-g1933ea365aa7 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Workqueue: bat_events batadv_nc_worker
RIP: 0010:__lock_acquire+0x233/0x56d0 kernel/locking/lockdep.c:4989
Code: 00 3b 74 24 18 75 0c 48 83 7c 24 20 00 0f 85 6c 0d 00 00 4c 03 64 24 28 0f b7 4c 24 18 49 8d 44 24 20 48 89 c2 48 89 44 24 38 <66> 81 e1 ff 1f 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 0f b6 14
RSP: 0018:ffffc9000559fa28 EFLAGS: 00000082
RAX: ffff8880177e2800 RBX: ffff8880177e2790 RCX: 000000000000002a
RDX: ffff8880177e2800 RSI: 00000000000006c1 RDI: ffff8880177e27d8
RBP: 0000000000000000 R08: 1ffff11002efc4fb R09: 0000000000000000
R10: fffffbfff1ca56ea R11: 0000000000000000 R12: ffff8880177e27e0
R13: ffff8880177e1d40 R14: ffffffff8c58fdc0 R15: 0000000000000002
FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055ff43e98600 CR3: 0000000022a0e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_acquire kernel/locking/lockdep.c:5668 [inline]
lock_acquire+0x1e3/0x630 kernel/locking/lockdep.c:5633
rcu_lock_acquire include/linux/rcupdate.h:316 [inline]
rcu_read_lock include/linux/rcupdate.h:750 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:408 [inline]
batadv_nc_worker+0x131/0xfa0 net/batman-adv/network-coding.c:719
process_one_work+0x9bf/0x1710 kernel/workqueue.c:2289
worker_thread+0x669/0x1090 kernel/workqueue.c:2436
kthread+0x2e8/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306