INFO: task syz-executor.4:19959 blocked for more than 143 seconds.
Not tainted 6.2.0-syzkaller-12998-gc0927a7a5391 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:21768 pid:19959 ppid:1 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5304 [inline]
__schedule+0x17d8/0x4990 kernel/sched/core.c:6622
schedule+0xc3/0x180 kernel/sched/core.c:6698
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6757
rwsem_down_write_slowpath+0xedd/0x13a0 kernel/locking/rwsem.c:1178
__down_write_common+0x1aa/0x200 kernel/locking/rwsem.c:1306
register_netdevice_notifier+0x92/0x490 net/core/dev.c:1712
devlink_alloc_ns+0x118/0x890 net/devlink/core.c:208
nsim_drv_probe+0xb2/0xb80 drivers/net/netdevsim/dev.c:1533
really_probe+0x2af/0xc80 drivers/base/dd.c:631
__driver_probe_device+0x1c3/0x3f0 drivers/base/dd.c:768
driver_probe_device+0x50/0x420 drivers/base/dd.c:798
__device_attach_driver+0x2d3/0x520 drivers/base/dd.c:926
bus_for_each_drv+0x231/0x2c0 drivers/base/bus.c:457
__device_attach+0x32f/0x510 drivers/base/dd.c:998
bus_probe_device+0x175/0x250 drivers/base/bus.c:532
device_add+0xbcf/0x1060 drivers/base/core.c:3589
nsim_bus_dev_new drivers/net/netdevsim/bus.c:290 [inline]
new_device_store+0x3e9/0x800 drivers/net/netdevsim/bus.c:167
kernfs_fop_write_iter+0x3a6/0x4f0 fs/kernfs/file.c:334
call_write_iter include/linux/fs.h:1851 [inline]
new_sync_write fs/read_write.c:491 [inline]
vfs_write+0x7b2/0xbb0 fs/read_write.c:584
ksys_write+0x1a0/0x2c0 fs/read_write.c:637
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f64c563de7f
RSP: 002b:00007ffca2771620 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f64c563de7f
RDX: 0000000000000003 RSI: 00007ffca2771670 RDI: 0000000000000005
RBP: 0000000000000005 R08: 0000000000000000 R09: 00007ffca27715c0
R10: 0000000000000000 R11: 0000000000000293 R12: 00007f64c56e7722
R13: 00007ffca2771670 R14: 0000000000000000 R15: 00007ffca2771d40
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8d127c70 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:510
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8d128470 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:510
1 lock held by khungtaskd/28:
#0: ffffffff8d127aa0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
1 lock held by klogd/4423:
#0: ffff8880b983be98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:539
2 locks held by getty/4757:
#0: ffff88802c2a4098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:244
#1: ffffc900015a02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6ab/0x1db0 drivers/tty/n_tty.c:2177
3 locks held by kworker/u4:9/17383:
#0: ffff888016612938 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x77f/0x13a0
#1: ffffc900052d7d20 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x7c6/0x13a0 kernel/workqueue.c:2365
#2: ffffffff8e28a190 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0xf5/0xb80 net/core/net_namespace.c:575
2 locks held by kworker/u4:12/17409:
6 locks held by syz-executor.4/19959:
#0: ffff888018946460 (sb_writers#8){.+.+}-{0:0}, at: vfs_write+0x26d/0xbb0 fs/read_write.c:580
#1: ffff88801d0de488 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x1eb/0x4f0 fs/kernfs/file.c:325
#2: ffff888146dc7918 (kn->active#52){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x20f/0x4f0 fs/kernfs/file.c:326
#3: ffffffff8dc08da8 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: new_device_store+0x1b1/0x800 drivers/net/netdevsim/bus.c:160
#4: ffff88803ad9c0e8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:832 [inline]
#4: ffff88803ad9c0e8 (&dev->mutex){....}-{3:3}, at: __device_attach+0x8e/0x510 drivers/base/dd.c:973
#5: ffffffff8e28a190 (pernet_ops_rwsem){++++}-{3:3}, at: register_netdevice_notifier+0x92/0x490 net/core/dev.c:1712
1 lock held by syz-executor.4/20363:
#0: ffffffff8e28a190 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4af/0x790 net/core/net_namespace.c:486
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.2.0-syzkaller-12998-gc0927a7a5391 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x4e5/0x560 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x1b4/0x410 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+0x1024/0x1070 kernel/hung_task.c:379
kthread+0x270/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 15522 Comm: kworker/0:6 Not tainted 6.2.0-syzkaller-12998-gc0927a7a5391 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023
Workqueue: events nsim_dev_trap_report_work
RIP: 0010:find_stack lib/stackdepot.c:345 [inline]
RIP: 0010:__stack_depot_save+0x15a/0x650 lib/stackdepot.c:384
Code: 48 8b 2d d1 6a 8e 0d 8b 1d c7 6a 8e 0d 44 21 f3 4c 8b 64 dd 00 45 89 c5 eb 04 4d 8b 24 24 4d 85 e4 74 2c 45 39 74 24 08 75 f0 <45> 39 44 24 0c 75 e9 31 c0 49 8b 0c c7 49 3b 4c c4 18 75 dc 48 ff
RSP: 0018:ffffc9000aa7f758 EFLAGS: 00000246
RAX: 00000000f2fedce4 RBX: 00000000000f1440 RCX: 0000000042bbf5ad
RDX: ffffc9000aa7f7f8 RSI: 0000000000000001 RDI: 0000000000082820
RBP: ffff88823b400000 R08: 000000000000000a R09: ffffc9000aa7f710
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88806deaf1c0
R13: 000000000000000a R14: 0000000016cf1440 R15: ffffc9000aa7f7b0
FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055e8d10261c0 CR3: 000000000cf30000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
kasan_save_stack mm/kasan/common.c:46 [inline]
kasan_set_track+0x61/0x70 mm/kasan/common.c:52
____kasan_kmalloc mm/kasan/common.c:374 [inline]
__kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:383
kasan_kmalloc include/linux/kasan.h:196 [inline]
__do_kmalloc_node mm/slab_common.c:967 [inline]
__kmalloc_node_track_caller+0xb1/0x190 mm/slab_common.c:987
kmalloc_reserve+0x120/0x220 net/core/skbuff.c:539
__alloc_skb+0x1b1/0x420 net/core/skbuff.c:608
alloc_skb include/linux/skbuff.h:1277 [inline]
nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:751 [inline]
nsim_dev_trap_report drivers/net/netdevsim/dev.c:808 [inline]
nsim_dev_trap_report_work+0x250/0xa90 drivers/net/netdevsim/dev.c:853
process_one_work+0x915/0x13a0 kernel/workqueue.c:2390
worker_thread+0xa63/0x1210 kernel/workqueue.c:2537
kthread+0x270/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308