INFO: task kworker/1:5:6516 blocked for more than 143 seconds. Not tainted 6.14.0-rc5-syzkaller-g14d05f12084d #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:5 state:D stack:0 pid:6516 tgid:6516 ppid:2 task_flags:0x4208060 flags:0x00000008 Workqueue: events p9_write_work Call trace: __switch_to+0x414/0x788 arch/arm64/kernel/process.c:701 (T) context_switch kernel/sched/core.c:5378 [inline] __schedule+0x1360/0x257c kernel/sched/core.c:6765 __schedule_loop kernel/sched/core.c:6842 [inline] schedule+0xbc/0x238 kernel/sched/core.c:6857 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6914 __mutex_lock_common+0xd30/0x24b8 kernel/locking/mutex.c:662 __mutex_lock kernel/locking/mutex.c:730 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:782 pipe_write+0x184/0x1880 fs/pipe.c:456 __kernel_write_iter+0x340/0x7a0 fs/read_write.c:612 __kernel_write fs/read_write.c:632 [inline] kernel_write+0x1cc/0x2d0 fs/read_write.c:653 p9_fd_write net/9p/trans_fd.c:432 [inline] p9_write_work+0x45c/0xc1c net/9p/trans_fd.c:483 process_one_work+0x810/0x1638 kernel/workqueue.c:3238 process_scheduled_works kernel/workqueue.c:3319 [inline] worker_thread+0x97c/0xeec kernel/workqueue.c:3400 kthread+0x65c/0x7b0 kernel/kthread.c:464 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:862 Showing all locks held in the system: 1 lock held by khungtaskd/31: #0: ffff80008fda22a0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:336 3 locks held by kworker/u8:3/44: #0: ffff0000c32ea948 ((wq_completion)cfg80211){+.+.}-{0:0}, at: process_one_work+0x674/0x1638 kernel/workqueue.c:3212 #1: ffff8000993b7ba0 ((work_completion)(&(&rdev->dfs_update_channels_wk)->work)){+.+.}-{0:0}, at: process_one_work+0x708/0x1638 kernel/workqueue.c:3212 #2: ffff800092b71f28 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:79 3 locks held by kworker/u8:5/528: #0: ffff0000d2e1b948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x674/0x1638 kernel/workqueue.c:3212 #1: ffff80009cb17ba0 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x708/0x1638 kernel/workqueue.c:3212 #2: ffff800092b71f28 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:79 1 lock held by dhcpcd/6114: #0: ffff800092b71f28 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:79 2 locks held by getty/6207: #0: ffff0000d317f0a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80009bcae2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x41c/0x1228 drivers/tty/n_tty.c:2211 3 locks held by kworker/1:5/6516: #0: ffff0000c0028d48 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x674/0x1638 kernel/workqueue.c:3212 #1: ffff8000b2d67ba0 ((work_completion)(&m->wq)){+.+.}-{0:0}, at: process_one_work+0x708/0x1638 kernel/workqueue.c:3212 #2: ffff0000d52c8c68 (&pipe->mutex){+.+.}-{4:4}, at: pipe_write+0x184/0x1880 fs/pipe.c:456 3 locks held by kworker/u8:12/6549: #0: ffff0000c0031148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x674/0x1638 kernel/workqueue.c:3212 #1: ffff8000a3fa7ba0 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x708/0x1638 kernel/workqueue.c:3212 #2: ffff800092b71f28 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:79 4 locks held by kworker/u8:13/8193: #0: ffff0000c1899948 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x674/0x1638 kernel/workqueue.c:3212 #1: ffff80009f5a7ba0 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x708/0x1638 kernel/workqueue.c:3212 #2: ffff800092b65790 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0x148/0xa48 net/core/net_namespace.c:606 #3: ffff800092b71f28 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:79 2 locks held by syz.4.646/9146: #0: ffff0000d52c8c68 (&pipe->mutex){+.+.}-{4:4}, at: pipe_write+0x184/0x1880 fs/pipe.c:456 #1: ffff0000f3c902e8 (mapping.invalidate_lock#4){.+.+}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:932 [inline] #1: ffff0000f3c902e8 (mapping.invalidate_lock#4){.+.+}-{4:4}, at: page_cache_ra_unbounded+0x100/0x758 mm/readahead.c:229 2 locks held by syz-executor/10541: #0: ffff800091aaa560 (&ops->srcu#2){.+.+}-{0:0}, at: srcu_lock_acquire+0x18/0x54 include/linux/srcu.h:163 #1: ffff800092b71f28 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #1: ffff800092b71f28 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:335 [inline] #1: ffff800092b71f28 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0xaf8/0x1844 net/core/rtnetlink.c:4021 2 locks held by syz-executor/10548: #0: ffff800091aaa560 (&ops->srcu#2){.+.+}-{0:0}, at: srcu_lock_acquire+0x18/0x54 include/linux/srcu.h:163 #1: ffff800092b71f28 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #1: ffff800092b71f28 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:335 [inline] #1: ffff800092b71f28 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0xaf8/0x1844 net/core/rtnetlink.c:4021 2 locks held by syz-executor/10552: #0: ffff80008fbc1630 (&ops->srcu#2){.+.+}-{0:0}, at: srcu_lock_acquire+0x18/0x54 include/linux/srcu.h:163 #1: ffff800092b71f28 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #1: ffff800092b71f28 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:335 [inline] #1: ffff800092b71f28 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0xaf8/0x1844 net/core/rtnetlink.c:4021 1 lock held by syz.3.1113/10634: #0: ffff800092b71f28 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:79 1 lock held by syz.0.1115/10660: #0: ffff800092b71f28 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffff800092b71f28 (rtnl_mutex){+.+.}-{4:4}, at: rtnetlink_rcv_msg+0x5e8/0xa9c net/core/rtnetlink.c:6918 =============================================