INFO: task syz-executor.1:15242 blocked for more than 143 seconds.
Not tainted 6.4.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:24216 pid:15242 ppid:1 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5343 [inline]
__schedule+0xc9a/0x5880 kernel/sched/core.c:6669
schedule+0xde/0x1a0 kernel/sched/core.c:6745
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6804
rwsem_down_write_slowpath+0x3e2/0x1220 kernel/locking/rwsem.c:1178
__down_write_common kernel/locking/rwsem.c:1306 [inline]
__down_write kernel/locking/rwsem.c:1315 [inline]
down_write+0x1d2/0x200 kernel/locking/rwsem.c:1574
unregister_netdevice_notifier+0x22/0x180 net/core/dev.c:1757
devlink_free+0x2cb/0x460 net/devlink/core.c:269
nsim_drv_remove+0x158/0x1d0 drivers/net/netdevsim/dev.c:1687
device_remove+0xc8/0x170 drivers/base/dd.c:567
__device_release_driver drivers/base/dd.c:1272 [inline]
device_release_driver_internal+0x443/0x610 drivers/base/dd.c:1295
bus_remove_device+0x22c/0x420 drivers/base/bus.c:574
device_del+0x399/0xa30 drivers/base/core.c:3814
device_unregister+0x1e/0xc0 drivers/base/core.c:3844
nsim_bus_dev_del drivers/net/netdevsim/bus.c:310 [inline]
del_device_store+0x34e/0x4a0 drivers/net/netdevsim/bus.c:219
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:1868 [inline]
new_sync_write fs/read_write.c:491 [inline]
vfs_write+0x945/0xd50 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: 0033:0x7f229ea3deef
RSP: 002b:00007f229eccf220 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007f229ea3deef
RDX: 0000000000000001 RSI: 00007f229eccf270 RDI: 0000000000000005
RBP: 0000000000000005 R08: 0000000000000000 R09: 00007f229eccf1c0
R10: 0000000000000000 R11: 0000000000000293 R12: 00007f229eae78b6
R13: 00007f229eccf270 R14: 0000000000000000 R15: 00007f229eccf940
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/13:
#0: ffffffff8c798430 (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: ffffffff8c798130 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xd80 kernel/rcu/tasks.h:518
1 lock held by khungtaskd/28:
#0: ffffffff8c799040 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x340 kernel/locking/lockdep.c:6545
2 locks held by getty/4758:
#0: ffff88814a8b1098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x26/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc900015b02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xef4/0x13e0 drivers/tty/n_tty.c:2176
4 locks held by kworker/u4:6/1716:
#0: ffff888014267938 ((wq_completion)netns){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888014267938 ((wq_completion)netns){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888014267938 ((wq_completion)netns){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1324 [inline]
#0: ffff888014267938 ((wq_completion)netns){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:643 [inline]
#0: ffff888014267938 ((wq_completion)netns){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:670 [inline]
#0: ffff888014267938 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x883/0x15e0 kernel/workqueue.c:2376
#1: ffffc9000389fdb0 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x8b7/0x15e0 kernel/workqueue.c:2380
#2: ffffffff8e100cd0 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x9f/0xb10 net/core/net_namespace.c:576
#3: ffffffff8c7a4380 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x48/0x6a0 kernel/rcu/tree.c:3961
6 locks held by syz-executor.1/15242:
#0: ffff88802b350460 (sb_writers#8){.+.+}-{0:0}, at: ksys_write+0x12b/0x250 fs/read_write.c:637
#1: ffff888029bf0c88 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x285/0x600 fs/kernfs/file.c:325
#2: ffff888021b1f748 (kn->active#51){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x2a9/0x600 fs/kernfs/file.c:326
#3: ffffffff8d7f94a8 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: del_device_store+0xc9/0x4a0 drivers/net/netdevsim/bus.c:209
#4: ffff888042d2b0e8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:837 [inline]
#4: ffff888042d2b0e8 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1095 [inline]
#4: ffff888042d2b0e8 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal+0xa4/0x610 drivers/base/dd.c:1292
#5: ffffffff8e100cd0 (pernet_ops_rwsem){++++}-{3:3}, at: unregister_netdevice_notifier+0x22/0x180 net/core/dev.c:1757
1 lock held by syz-executor.1/15338:
#0: ffffffff8e100cd0 (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 6.4.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023
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+0x344/0x440 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: 10755 Comm: kworker/u4:16 Not tainted 6.4.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023
Workqueue: bat_events batadv_nc_worker
RIP: 0010:mark_lock.part.0+0x17e/0x1970 kernel/locking/lockdep.c:4670
Code: 00 00 00 00 48 c7 43 14 00 00 00 00 48 8b 84 24 30 01 00 00 65 48 2b 04 25 28 00 00 00 0f 85 27 13 00 00 48 81 c4 38 01 00 00 <44> 89 d0 5b 5d 41 5c 41 5d 41 5e 41 5f c3 48 8d 7e 22 48 89 f8 48
RSP: 0018:ffffc900001dfd18 EFLAGS: 00000086
RAX: 0000000000000000 RBX: fffff5200003bf83 RCX: 1ffffffff22a502e
RDX: dffffc0000000000 RSI: 0000000000000100 RDI: ffffffff91528170
RBP: 0000000000000100 R08: 0000000000000000 R09: ffffffff91527d07
R10: 0000000000000001 R11: 0000000000000001 R12: ffff88802cc364d0
R13: 0000000000000008 R14: 0000000000000000 R15: ffff88802cc364f0
FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c000dcf000 CR3: 000000000c571000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 000000000000003b DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
mark_lock kernel/locking/lockdep.c:4615 [inline]
mark_usage kernel/locking/lockdep.c:4572 [inline]
__lock_acquire+0x8c4/0x5df0 kernel/locking/lockdep.c:5028
lock_acquire kernel/locking/lockdep.c:5691 [inline]
lock_acquire+0x1b1/0x520 kernel/locking/lockdep.c:5656
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x3d/0x60 kernel/locking/spinlock.c:162
__debug_check_no_obj_freed lib/debugobjects.c:1000 [inline]
debug_check_no_obj_freed+0xcb/0x420 lib/debugobjects.c:1043
slab_free_hook mm/slub.c:1756 [inline]
slab_free_freelist_hook+0xeb/0x1c0 mm/slub.c:1807
slab_free mm/slub.c:3786 [inline]
kmem_cache_free+0xe9/0x480 mm/slub.c:3808
kfree_skbmem+0xef/0x1b0 net/core/skbuff.c:971
__kfree_skb net/core/skbuff.c:1029 [inline]
kfree_skb_reason+0x186/0x3c0 net/core/skbuff.c:1064
kfree_skb include/linux/skbuff.h:1236 [inline]
ip6_mc_input+0xa3c/0xf50 net/ipv6/ip6_input.c:588
dst_input include/net/dst.h:468 [inline]
ip6_rcv_finish+0x197/0x2c0 net/ipv6/ip6_input.c:79
ip_sabotage_in+0x22a/0x2a0 net/bridge/br_netfilter_hooks.c:880
nf_hook_entry_hookfn include/linux/netfilter.h:143 [inline]
nf_hook_slow+0xc9/0x1f0 net/netfilter/core.c:626
nf_hook.constprop.0+0x408/0x710 include/linux/netfilter.h:258
NF_HOOK include/linux/netfilter.h:301 [inline]
ipv6_rcv+0xa2/0x380 net/ipv6/ip6_input.c:309
__netif_receive_skb_one_core+0x114/0x180 net/core/dev.c:5491
__netif_receive_skb+0x1f/0x1c0 net/core/dev.c:5605
netif_receive_skb_internal net/core/dev.c:5691 [inline]
netif_receive_skb+0x133/0x7a0 net/core/dev.c:5750
NF_HOOK include/linux/netfilter.h:303 [inline]
NF_HOOK include/linux/netfilter.h:297 [inline]
br_pass_frame_up+0x303/0x430 net/bridge/br_input.c:68
br_handle_frame_finish+0xd1f/0x1de0 net/bridge/br_input.c:216
br_nf_hook_thresh+0x2fb/0x3f0 net/bridge/br_netfilter_hooks.c:1048
br_nf_pre_routing_finish_ipv6+0x695/0xf30 net/bridge/br_netfilter_ipv6.c:148
NF_HOOK include/linux/netfilter.h:303 [inline]
br_nf_pre_routing_ipv6+0x41b/0x830 net/bridge/br_netfilter_ipv6.c:178
br_nf_pre_routing+0xda4/0x1520 net/bridge/br_netfilter_hooks.c:508
nf_hook_entry_hookfn include/linux/netfilter.h:143 [inline]
nf_hook_bridge_pre net/bridge/br_input.c:272 [inline]
br_handle_frame+0x9cb/0x1320 net/bridge/br_input.c:416
__netif_receive_skb_core+0xa10/0x3900 net/core/dev.c:5385
__netif_receive_skb_one_core+0xae/0x180 net/core/dev.c:5489
__netif_receive_skb+0x1f/0x1c0 net/core/dev.c:5605
process_backlog+0x101/0x670 net/core/dev.c:5933
__napi_poll+0xb7/0x6f0 net/core/dev.c:6496
napi_poll net/core/dev.c:6563 [inline]
net_rx_action+0x8a9/0xcb0 net/core/dev.c:6696
__do_softirq+0x1d4/0x905 kernel/softirq.c:571
do_softirq.part.0+0xde/0x130 kernel/softirq.c:472
do_softirq kernel/softirq.c:464 [inline]
__local_bh_enable_ip+0x106/0x130 kernel/softirq.c:396
spin_unlock_bh include/linux/spinlock.h:395 [inline]
batadv_nc_purge_paths+0x1cc/0x3c0 net/batman-adv/network-coding.c:471
batadv_nc_worker+0x8fa/0xfe0 net/batman-adv/network-coding.c:720
process_one_work+0x99a/0x15e0 kernel/workqueue.c:2405
worker_thread+0x67d/0x10c0 kernel/workqueue.c:2552
kthread+0x344/0x440 kernel/kthread.c:379
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308