INFO: task syz-executor:8279 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:21800 pid:8279  tgid:8279  ppid:1      task_flags:0x400140 flags:0x00080002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5583 [inline]
 __schedule+0x171d/0x56e0 kernel/sched/core.c:7382
 __schedule_loop kernel/sched/core.c:7459 [inline]
 rt_mutex_schedule+0x76/0xf0 kernel/sched/core.c:7724
 rwbase_write_lock+0x3e0/0x780 kernel/locking/rwbase_rt.c:279
 __super_lock fs/super.c:60 [inline]
 __super_lock_excl fs/super.c:75 [inline]
 deactivate_super+0xac/0xe0 fs/super.c:613
 cleanup_mnt+0x204/0x2a0 fs/namespace.c:1396
 task_work_run+0x1d9/0x260 kernel/task_work.c:233
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 __exit_to_user_mode_loop kernel/entry/common.c:70 [inline]
 exit_to_user_mode_loop+0x204/0x770 kernel/entry/common.c:101
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:343 [inline]
 do_syscall_64+0x328/0x520 arch/x86/entry/syscall_64.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8a92ed0797
RSP: 002b:00007ffd976e5158 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f8a92f65f63 RCX: 00007f8a92ed0797
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffd976e5210
RBP: 00007ffd976e5210 R08: 00007ffd976e6210 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd976e62a0
R13: 00007f8a92f65f63 R14: 000000000005a909 R15: 00007ffd976e62e0
 </TASK>
INFO: task syz.0.261:9004 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.261       state:D stack:26080 pid:9004  tgid:9003  ppid:7776   task_flags:0x400040 flags:0x00080002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5583 [inline]
 __schedule+0x171d/0x56e0 kernel/sched/core.c:7382
 __schedule_loop kernel/sched/core.c:7459 [inline]
 schedule+0x164/0x2b0 kernel/sched/core.c:7474
 jfs_flush_journal+0x719/0xf50 fs/jfs/jfs_logmgr.c:1561
 jfs_sync_fs+0x7d/0xa0 fs/jfs/super.c:650
 dquot_quota_sync+0xd1/0x490 fs/quota/dquot.c:782
 __iterate_supers+0x282/0x420 fs/super.c:980
 quota_sync_all fs/quota/quota.c:69 [inline]
 __do_sys_quotactl fs/quota/quota.c:938 [inline]
 __se_sys_quotactl+0x3a0/0x9a0 fs/quota/quota.c:917
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ffaad84f559
RSP: 002b:00007ffaaba9e028 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007ffaadad5fa0 RCX: 00007ffaad84f559
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff80000101
RBP: 00007ffaad8e6b20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffaadad6038 R14: 00007ffaadad5fa0 R15: 00007fff7ee56018
 </TASK>
INFO: task syz.4.266:9026 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.266       state:D stack:26800 pid:9026  tgid:9025  ppid:7822   task_flags:0x400040 flags:0x00080002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5583 [inline]
 __schedule+0x171d/0x56e0 kernel/sched/core.c:7382
 __schedule_loop kernel/sched/core.c:7459 [inline]
 rt_mutex_schedule+0x76/0xf0 kernel/sched/core.c:7724
 rt_mutex_slowlock_block kernel/locking/rtmutex.c:1670 [inline]
 __rt_mutex_slowlock kernel/locking/rtmutex.c:1747 [inline]
 __rt_mutex_slowlock_locked+0x1f86/0x25f0 kernel/locking/rtmutex.c:1787
 __rwbase_read_lock+0xc3/0x190 kernel/locking/rwbase_rt.c:114
 rwbase_read_lock kernel/locking/rwbase_rt.c:147 [inline]
 __down_read kernel/locking/rwsem.c:1502 [inline]
 down_read+0x12d/0x200 kernel/locking/rwsem.c:1576
 __super_lock fs/super.c:62 [inline]
 super_lock+0x2d1/0x3d0 fs/super.c:124
 __iterate_supers+0x26b/0x420 fs/super.c:979
 quota_sync_all fs/quota/quota.c:69 [inline]
 __do_sys_quotactl fs/quota/quota.c:938 [inline]
 __se_sys_quotactl+0x3a0/0x9a0 fs/quota/quota.c:917
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f69d90af559
RSP: 002b:00007f69d72fe028 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007f69d9335fa0 RCX: 00007f69d90af559
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff80000101
RBP: 00007f69d9146b20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f69d9336038 R14: 00007f69d9335fa0 R15: 00007ffe1d3b2878
 </TASK>

Showing all locks held in the system:
locks held by kworker/u8:0/12: 4, last CPU#0:
 #0: ffff888033b22140 ((wq_completion)wg-kex-wg0#45){+.+.}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
 #0: ffff888033b22140 ((wq_completion)wg-kex-wg0#45){+.+.}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #0: ffff888033b22140 ((wq_completion)wg-kex-wg0#45){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3460 [inline]
 #0: ffff888033b22140 ((wq_completion)wg-kex-wg0#45){+.+.}-{0:0}, at: process_scheduled_works+0x97a/0x1630 kernel/workqueue.c:3578
 #1: ffffc90000117c40 ((work_completion)(&peer->transmit_handshake_work)){+.+.}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
 #1: ffffc90000117c40 ((work_completion)(&peer->transmit_handshake_work)){+.+.}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #1: ffffc90000117c40 ((work_completion)(&peer->transmit_handshake_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3460 [inline]
 #1: ffffc90000117c40 ((work_completion)(&peer->transmit_handshake_work)){+.+.}-{0:0}, at: process_scheduled_works+0x97a/0x1630 kernel/workqueue.c:3578
 #2: ffffffff8f3c7470 (&rcu_state.gp_wq){-...}-{2:2}, at: swake_up_one+0x21/0x140 kernel/sched/swait.c:52
 #3: ffff88801dec68c0 (&p->pi_lock){-...}-{2:2}, at: class_raw_spinlock_irqsave_constructor include/linux/spinlock.h:595 [inline]
 #3: ffff88801dec68c0 (&p->pi_lock){-...}-{2:2}, at: try_to_wake_up+0x67/0x1430 kernel/sched/core.c:4365
locks held by khungtaskd/38: 1, last CPU#1:
 #0: ffffffff8f3c1000 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
 #0: ffffffff8f3c1000 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #0: ffffffff8f3c1000 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6871
locks held by kworker/u8:2/48: 3, on CPU#0:
 #0: ffff88801b754140 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
 #0: ffff88801b754140 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #0: ffff88801b754140 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3460 [inline]
 #0: ffff88801b754140 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x97a/0x1630 kernel/workqueue.c:3578
 #1: ffffc90000ba7c40 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
 #1: ffffc90000ba7c40 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #1: ffffc90000ba7c40 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3460 [inline]
 #1: ffffc90000ba7c40 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x97a/0x1630 kernel/workqueue.c:3578
 #2: ffffffff90802858 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_lock include/linux/rtnetlink.h:134 [inline]
 #2: ffffffff90802858 (rtnl_mutex){+.+.}-{4:4}, at: addrconf_dad_work+0x123/0x16e0 net/ipv6/addrconf.c:4255
locks held by kworker/u8:3/58: 6, on CPU#0:
 #0: ffff88801c280940 ((wq_completion)netns){+.+.}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
 #0: ffff88801c280940 ((wq_completion)netns){+.+.}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #0: ffff88801c280940 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3460 [inline]
 #0: ffff88801c280940 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x97a/0x1630 kernel/workqueue.c:3578
 #1: ffffc9000124fc40 (net_cleanup_work){+.+.}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
 #1: ffffc9000124fc40 (net_cleanup_work){+.+.}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #1: ffffc9000124fc40 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3460 [inline]
 #1: ffffc9000124fc40 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x97a/0x1630 kernel/workqueue.c:3578
 #2: ffffffff907f3b80 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0xf5/0x810 net/core/net_namespace.c:677
 #3: ffff88803a334160 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1104 [inline]
 #3: ffff88803a334160 (&dev->mutex){....}-{4:4}, at: devl_dev_lock net/devlink/devl_internal.h:124 [inline]
 #3: ffff88803a334160 (&dev->mutex){....}-{4:4}, at: devlink_pernet_pre_exit+0x122/0x560 net/devlink/core.c:581
 #4: ffff88802d6bc310 (&devlink->lock_key#27){+.+.}-{4:4}, at: devl_lock net/devlink/core.c:314 [inline]
 #4: ffff88802d6bc310 (&devlink->lock_key#27){+.+.}-{4:4}, at: devl_dev_lock net/devlink/devl_internal.h:125 [inline]
 #4: ffff88802d6bc310 (&devlink->lock_key#27){+.+.}-{4:4}, at: devlink_pernet_pre_exit+0x138/0x560 net/devlink/core.c:581
 #5: ffffffff90802858 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_lock include/linux/rtnetlink.h:134 [inline]
 #5: ffffffff90802858 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_dev_lock+0x257/0x2f0 net/core/dev.c:2226
locks held by kworker/u8:9/158: 3, on CPU#1:
 #0: ffff88813fe34140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
 #0: ffff88813fe34140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #0: ffff88813fe34140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3460 [inline]
 #0: ffff88813fe34140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x97a/0x1630 kernel/workqueue.c:3578
 #1: ffffc90004177c40 ((linkwatch_work).work){+.+.}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
 #1: ffffc90004177c40 ((linkwatch_work).work){+.+.}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #1: ffffc90004177c40 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3460 [inline]
 #1: ffffc90004177c40 ((linkwatch_work).work){+.+.}-{0:0}, at: process_scheduled_works+0x97a/0x1630 kernel/workqueue.c:3578
 #2: ffffffff90802858 (rtnl_mutex){+.+.}-{4:4}, at: linkwatch_event+0xe/0x60 net/core/link_watch.c:313
locks held by getty/5350: 2, on CPU#0:
 #0: ffff8880375680a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
 #1: ffffc900044cb2e0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x460/0x1360 drivers/tty/n_tty.c:2211
locks held by syz-executor/8279: 1, on CPU#1:
 #0: ffff8880645d80e0 (&type->s_umount_key#62){++++}-{4:4}, at: __super_lock fs/super.c:60 [inline]
 #0: ffff8880645d80e0 (&type->s_umount_key#62){++++}-{4:4}, at: __super_lock_excl fs/super.c:75 [inline]
 #0: ffff8880645d80e0 (&type->s_umount_key#62){++++}-{4:4}, at: deactivate_super+0xac/0xe0 fs/super.c:613
locks held by syz.0.261/9004: 1, on CPU#1:
 #0: ffff8880645d80e0 (&type->s_umount_key#62){++++}-{4:4}, at: __super_lock fs/super.c:62 [inline]
 #0: ffff8880645d80e0 (&type->s_umount_key#62){++++}-{4:4}, at: super_lock+0x2d1/0x3d0 fs/super.c:124
locks held by syz.4.266/9026: 1, on CPU#1:
 #0: ffff8880645d80e0 (&type->s_umount_key#62){++++}-{4:4}, at: __super_lock fs/super.c:62 [inline]
 #0: ffff8880645d80e0 (&type->s_umount_key#62){++++}-{4:4}, at: super_lock+0x2d1/0x3d0 fs/super.c:124
locks held by dhcpcd/9921: 1, on CPU#0:
 #0: ffff88806a5b31f8 (&sb->s_type->i_mutex_key#12){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1024 [inline]
 #0: ffff88806a5b31f8 (&sb->s_type->i_mutex_key#12){+.+.}-{4:4}, at: __sock_release+0x7a/0x1f0 net/socket.c:734
locks held by syz-executor/10347: 2, on CPU#1:
 #0: ffffffff908673a0 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1217
 #1: ffffffff90802858 (rtnl_mutex){+.+.}-{4:4}, at: nl80211_pre_doit+0x117/0xfa0 net/wireless/nl80211.c:20140
locks held by syz-executor/10612: 1, on CPU#0:
 #0: ffffffff90802858 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_lock include/linux/rtnetlink.h:134 [inline]
 #0: ffffffff90802858 (rtnl_mutex){+.+.}-{4:4}, at: inet6_rtm_newaddr+0x669/0xe10 net/ipv6/addrconf.c:5088
locks held by syz-executor/10666: 4, on CPU#1:
 #0: ffff8880384a6510 (sb_writers#7){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2758 [inline]
 #0: ffff8880384a6510 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x231/0xbb0 fs/read_write.c:683
 #1: ffff88801eeb1478 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1d9/0x540 fs/kernfs/file.c:336
 #2: ffff88802ae830f8 (kn->active#52){.+.+}-{0:0}, at: kernfs_get_active_of fs/kernfs/file.c:73 [inline]
 #2: ffff88802ae830f8 (kn->active#52){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x22c/0x540 fs/kernfs/file.c:337
 #3: ffffffff9004ba78 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: new_device_store+0x13c/0x6c0 drivers/net/netdevsim/bus.c:184
locks held by syz-executor/10700: 8, on CPU#1:
 #0: ffff8880384a6510 (sb_writers#7){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2758 [inline]
 #0: ffff8880384a6510 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x231/0xbb0 fs/read_write.c:683
 #1: ffff888033be1478 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1d9/0x540 fs/kernfs/file.c:336
 #2: ffff88802ae83008 (kn->active#51){.+.+}-{0:0}, at: kernfs_get_active_of fs/kernfs/file.c:73 [inline]
 #2: ffff88802ae83008 (kn->active#51){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x22c/0x540 fs/kernfs/file.c:337
 #3: ffffffff9004ba78 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: del_device_store+0xd6/0x370 drivers/net/netdevsim/bus.c:233
 #4: ffff88806431f160 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1104 [inline]
 #4: ffff88806431f160 (&dev->mutex){....}-{4:4}, at: __device_driver_lock drivers/base/dd.c:1171 [inline]
 #4: ffff88806431f160 (&dev->mutex){....}-{4:4}, at: device_release_driver_internal+0xb9/0x880 drivers/base/dd.c:1369
 #5: ffff888066626310 (&devlink->lock_key#16){+.+.}-{4:4}, at: nsim_drv_remove+0x50/0x160 drivers/net/netdevsim/dev.c:1724
 #6: ffffffff90802858 (rtnl_mutex){+.+.}-{4:4}, at: nsim_destroy+0x173/0x800 drivers/net/netdevsim/netdev.c:1201
 #7: ffff888022751088 (&dev->lock){+.+.}-{4:4}, at: netdev_lock include/linux/netdevice.h:2883 [inline]
 #7: ffff888022751088 (&dev->lock){+.+.}-{4:4}, at: netdev_lock_ops_close_many+0x28a/0x540 net/core/dev.c:12608
locks held by syz-executor/10814: 2, on CPU#1:
 #0: ffffffff8ff3a408 (&ops->srcu#2){.+.+}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
 #0: ffffffff8ff3a408 (&ops->srcu#2){.+.+}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #0: ffffffff8ff3a408 (&ops->srcu#2){.+.+}-{0:0}, at: rtnl_link_ops_get+0x23/0x250 net/core/rtnetlink.c:598
 #1: ffffffff90802858 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:80 [inline]
 #1: ffffffff90802858 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:366 [inline]
 #1: ffffffff90802858 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0xc1d/0x1c30 net/core/rtnetlink.c:4251
locks held by dhcpcd/10961: 1, on CPU#1:
 #0: ffff8880673ca358 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1717 [inline]
 #0: ffff8880673ca358 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x33/0xe90 net/packet/af_packet.c:3278
locks held by dhcpcd/10962: 1, last CPU#0:
 #0: ffff88803d23aab8 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_downgrade include/linux/mmap_lock.h:594 [inline]
 #0: ffff88803d23aab8 (&mm->mmap_lock){++++}-{4:4}, at: vms_complete_munmap_vmas+0x224/0xbe0 mm/vma.c:1420

=============================================

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 38 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 nmi_cpu_backtrace+0x274/0x2d0 lib/nmi_backtrace.c:123
 nmi_trigger_cpumask_backtrace+0x17d/0x390 lib/nmi_backtrace.c:66
 trigger_all_cpu_backtrace include/linux/nmi.h:164 [inline]
 __sys_info lib/sys_info.c:157 [inline]
 sys_info+0x135/0x170 lib/sys_info.c:165
 check_hung_uninterruptible_tasks kernel/hung_task.c:353 [inline]
 watchdog+0xfd2/0x1030 kernel/hung_task.c:561
 kthread+0x38b/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 5254 Comm: dhcpcd Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
RIP: 0010:lockdep_hardirqs_on+0xa2/0x110 kernel/locking/lockdep.c:4520
Code: 1e 00 00 65 c7 05 52 1c 64 08 01 00 00 00 4c 89 b3 b0 0b 00 00 8b 83 a8 0b 00 00 ff c0 89 83 a8 0b 00 00 89 83 c0 0b 00 00 5b <41> 5e e9 97 d6 03 00 cc 90 e8 d0 1c 64 f9 85 c0 74 1c 83 3d 09 5c
RSP: 0018:ffffc90004657bb8 EFLAGS: 00000002
RAX: 00000000001e999d RBX: 0000000000000297 RCX: 8000000000000001
RDX: 0000000000000000 RSI: ffffffff8dae9841 RDI: ffffffff8bec9b80
RBP: 0000000000000001 R08: ffffffff90d491bf R09: 1ffffffff21a9237
R10: dffffc0000000000 R11: fffffbfff21a9238 R12: dffffc0000000000
R13: ffff8880b8440e18 R14: ffffffff8b6cdec0 R15: ffff88802a500000
FS:  00007f1dd234e780(0000) GS:ffff88812474e000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1dd252a128 CR3: 000000003e872000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:210 [inline]
 _raw_spin_unlock_irqrestore+0x30/0x80 kernel/locking/spinlock.c:221
 rt_mutex_slowtrylock kernel/locking/rtmutex.c:1408 [inline]
 __rt_spin_trylock kernel/locking/spinlock_rt.c:123 [inline]
 rt_spin_trylock+0xd2/0x2b0 kernel/locking/spinlock_rt.c:135
 alloc_from_pcs mm/slub.c:4844 [inline]
 slab_alloc_node mm/slub.c:4984 [inline]
 __do_kmalloc_node mm/slub.c:5413 [inline]
 __kmalloc_noprof+0x1da/0x790 mm/slub.c:5439
 _kmalloc_noprof include/linux/slab.h:995 [inline]
 _kzalloc_noprof include/linux/slab.h:1312 [inline]
 lsm_blob_alloc security/security.c:219 [inline]
 lsm_sock_alloc security/security.c:4556 [inline]
 security_sk_alloc+0x52/0x360 security/security.c:4572
 sk_prot_alloc+0x101/0x210 net/core/sock.c:2284
 sk_alloc+0x3a/0x390 net/core/sock.c:2337
 __netlink_create+0x62/0x260 net/netlink/af_netlink.c:624
 netlink_create+0x3c6/0x5b0 net/netlink/af_netlink.c:682
 __sock_create+0x4b5/0xac0 net/socket.c:1679
 sock_create net/socket.c:1737 [inline]
 __sys_socket_create net/socket.c:1774 [inline]
 __sys_socket+0xd6/0x1b0 net/socket.c:1821
 __do_sys_socket net/socket.c:1835 [inline]
 __se_sys_socket net/socket.c:1833 [inline]
 __x64_sys_socket+0x7a/0x90 net/socket.c:1833
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1dd2453707
Code: 54 24 0c e8 6b ac ff ff 83 f8 ff 74 04 8b 44 24 0c 48 83 c4 18 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 b8 29 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d c1 e6 0c 00 f7 d8 64 89 01 48
RSP: 002b:00007ffcc2a6a998 EFLAGS: 00000206 ORIG_RAX: 0000000000000029
RAX: ffffffffffffffda RBX: 00007ffcc2a6aa30 RCX: 00007f1dd2453707
RDX: 0000000000000000 RSI: 0000000000080003 RDI: 0000000000000010
RBP: 00007ffcc2a6aa30 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 00007ffcc2a8b240
R13: 00007f1dd234e708 R14: 00007ffcc2a6aed8 R15: 00007ffcc2a7b010
 </TASK>