INFO: task syz-executor.2:23730 blocked for more than 143 seconds.
Not tainted 6.3.0-rc7-next-20230417-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:24400 pid:23730 ppid:1 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5334 [inline]
__schedule+0x1d23/0x5650 kernel/sched/core.c:6659
schedule+0xde/0x1a0 kernel/sched/core.c:6735
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6794
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0xa3b/0x1350 kernel/locking/mutex.c:747
new_device_store+0x170/0x690 drivers/net/netdevsim/bus.c:160
bus_attr_store+0x76/0xa0 drivers/base/bus.c:170
sysfs_kf_write+0x114/0x170 fs/sysfs/file.c:136
kernfs_fop_write_iter+0x3f1/0x600 fs/kernfs/file.c:334
call_write_iter include/linux/fs.h:1854 [inline]
new_sync_write fs/read_write.c:491 [inline]
vfs_write+0xa1d/0xe40 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: 0033:0x7f53e003deef
RSP: 002b:00007ffe6eaccee0 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f53e003deef
RDX: 0000000000000003 RSI: 00007ffe6eaccf30 RDI: 0000000000000005
RBP: 0000000000000005 R08: 0000000000000000 R09: 00007ffe6eacce80
R10: 0000000000000000 R11: 0000000000000293 R12: 00007f53e00e78da
R13: 00007ffe6eaccf30 R14: 0000000000000000 R15: 00007ffe6eacd600
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/13:
#0: ffffffff8c797230 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xd80 kernel/rcu/tasks.h:518
1 lock held by rcu_tasks_trace/14:
#0: ffffffff8c796f30 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xd80 kernel/rcu/tasks.h:518
2 locks held by ksoftirqd/0/15:
1 lock held by khungtaskd/28:
#0: ffffffff8c797e40 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x51/0x390 kernel/locking/lockdep.c:6545
2 locks held by getty/4758:
#0: ffff88802b0f0098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x26/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc900015a02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xef4/0x13e0 drivers/tty/n_tty.c:2176
4 locks held by kworker/u4:5/11354:
#0: ffff888015d1f938 ((wq_completion)netns){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888015d1f938 ((wq_completion)netns){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888015d1f938 ((wq_completion)netns){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1324 [inline]
#0: ffff888015d1f938 ((wq_completion)netns){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:643 [inline]
#0: ffff888015d1f938 ((wq_completion)netns){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:670 [inline]
#0: ffff888015d1f938 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x883/0x15e0 kernel/workqueue.c:2376
#1: ffffc9000bcffdb0 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x8b7/0x15e0 kernel/workqueue.c:2380
#2: ffffffff8e0ef350 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x9f/0xb10 net/core/net_namespace.c:576
#3: ffffffff8c7a3180 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x48/0x6a0 kernel/rcu/tree.c:3961
4 locks held by syz-executor.2/23730:
#0: ffff88802b316460 (sb_writers#8){.+.+}-{0:0}, at: ksys_write+0x12b/0x250 fs/read_write.c:637
#1: ffff888076f49088 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x285/0x600 fs/kernfs/file.c:325
#2: ffff888146fd1bd0 (kn->active#52){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x2a9/0x600 fs/kernfs/file.c:326
#3: ffffffff8d7e9f88 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: new_device_store+0x170/0x690 drivers/net/netdevsim/bus.c:160
6 locks held by syz-executor.5/23739:
#0: ffff88802b316460 (sb_writers#8){.+.+}-{0:0}, at: ksys_write+0x12b/0x250 fs/read_write.c:637
#1: ffff888049da7888 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x285/0x600 fs/kernfs/file.c:325
#2: ffff888146fd1cb8 (kn->active#51){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x2a9/0x600 fs/kernfs/file.c:326
#3: ffffffff8d7e9f88 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: del_device_store+0xc9/0x4a0 drivers/net/netdevsim/bus.c:209
#4: ffff88802daeb0e8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:837 [inline]
#4: ffff88802daeb0e8 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1090 [inline]
#4: ffff88802daeb0e8 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal+0xa4/0x610 drivers/base/dd.c:1287
#5: ffffffff8e0ef350 (pernet_ops_rwsem){++++}-{3:3}, at: unregister_netdevice_notifier+0x22/0x180 net/core/dev.c:1757
4 locks held by syz-executor.2/23766:
#0: ffff88802b316460 (sb_writers#8){.+.+}-{0:0}, at: ksys_write+0x12b/0x250 fs/read_write.c:637
#1: ffff88807cb4f488 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x285/0x600 fs/kernfs/file.c:325
#2: ffff888146fd1cb8 (kn->active#51){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x2a9/0x600 fs/kernfs/file.c:326
#3: ffffffff8d7e9f88 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: del_device_store+0xc9/0x4a0 drivers/net/netdevsim/bus.c:209
4 locks held by syz-executor.5/23771:
#0: ffff88802b316460 (sb_writers#8){.+.+}-{0:0}, at: ksys_write+0x12b/0x250 fs/read_write.c:637
#1: ffff88807ee45088 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x285/0x600 fs/kernfs/file.c:325
#2: ffff888146fd1cb8 (kn->active#51){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x2a9/0x600 fs/kernfs/file.c:326
#3: ffffffff8d7e9f88 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: del_device_store+0xc9/0x4a0 drivers/net/netdevsim/bus.c:209
4 locks held by syz-executor.3/23773:
#0: ffff88802b316460 (sb_writers#8){.+.+}-{0:0}, at: ksys_write+0x12b/0x250 fs/read_write.c:637
#1: ffff888070a5dc88 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x285/0x600 fs/kernfs/file.c:325
#2: ffff888146fd1cb8 (kn->active#51){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x2a9/0x600 fs/kernfs/file.c:326
#3: ffffffff8d7e9f88 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: del_device_store+0xc9/0x4a0 drivers/net/netdevsim/bus.c:209
1 lock held by syz-executor.2/23809:
#0: ffffffff8e0ef350 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4cb/0x8e0 net/core/net_namespace.c:487
1 lock held by syz-executor.3/23813:
#0: ffffffff8e0ef350 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4cb/0x8e0 net/core/net_namespace.c:487
1 lock held by syz-executor.5/23816:
#0: ffffffff8e0ef350 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4cb/0x8e0 net/core/net_namespace.c:487
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.3.0-rc7-next-20230417-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106
nmi_cpu_backtrace+0x29c/0x350 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x2a4/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
watchdog+0xe16/0x1090 kernel/hung_task.c:379
kthread+0x33e/0x440 kernel/kthread.c:379
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 23696 Comm: kworker/1:3 Not tainted 6.3.0-rc7-next-20230417-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023
Workqueue: events nsim_dev_trap_report_work
RIP: 0010:skb_free_head+0x2e/0x1b0 net/core/skbuff.c:861
Code: 41 54 55 89 f5 53 48 89 fb e8 ae 4e 80 f9 48 8d bb d0 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 <0f> 85 6c 01 00 00 48 8d 7b 7e 4c 8b b3 d0 00 00 00 48 b8 00 00 00
RSP: 0018:ffffc90015527ba8 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: ffff88807df3adc0 RCX: 0000000000000000
RDX: 1ffff1100fbe75d2 RSI: ffffffff880334e2 RDI: ffff88807df3ae90
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88807df3ae8c
R13: ffff88802ce86ef0 R14: 0000000000000000 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c0077ab000 CR3: 000000000c571000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
skb_release_data+0x598/0x820 net/core/skbuff.c:898
skb_release_all net/core/skbuff.c:964 [inline]
__kfree_skb net/core/skbuff.c:978 [inline]
consume_skb net/core/skbuff.c:1191 [inline]
consume_skb+0xd2/0x170 net/core/skbuff.c:1185
nsim_dev_trap_report drivers/net/netdevsim/dev.c:824 [inline]
nsim_dev_trap_report_work+0x87c/0xc80 drivers/net/netdevsim/dev.c:853
process_one_work+0x99a/0x15e0 kernel/workqueue.c:2405
worker_thread+0x67d/0x10c0 kernel/workqueue.c:2552
kthread+0x33e/0x440 kernel/kthread.c:379
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308