INFO: task syz-executor.0:2039 blocked for more than 430 seconds. Not tainted 5.17.0-rc1-syzkaller-00002-g0966d385830d #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack: 0 pid: 2039 ppid: 2035 flags:0x00000000 Call Trace: [] schedule+0x74/0x14c kernel/sched/core.c:6369 [] schedule_preempt_disabled+0x16/0x28 kernel/sched/core.c:6428 [] __mutex_lock_common kernel/locking/mutex.c:673 [inline] [] __mutex_lock+0x522/0xade kernel/locking/mutex.c:733 [] mutex_lock_nested+0x14/0x1c kernel/locking/mutex.c:785 [] new_device_store+0x106/0x46a drivers/net/netdevsim/bus.c:174 [] bus_attr_store+0x4e/0x6e drivers/base/bus.c:122 [] sysfs_kf_write+0x9c/0xbe fs/sysfs/file.c:136 [] kernfs_fop_write_iter+0x264/0x32e fs/kernfs/file.c:296 [] call_write_iter include/linux/fs.h:2074 [inline] [] new_sync_write+0x296/0x3aa fs/read_write.c:503 [] vfs_write+0x2de/0x334 fs/read_write.c:590 [] ksys_write+0x10a/0x224 fs/read_write.c:643 [] __do_sys_write fs/read_write.c:655 [inline] [] sys_write+0x28/0x36 fs/read_write.c:652 [] ret_from_syscall+0x0/0x2 Showing all locks held in the system: 2 locks held by kworker/1:0/20: 1 lock held by khungtaskd/27: #0: ffffffff84b73e00 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x3c/0x20e kernel/locking/lockdep.c:6462 2 locks held by kworker/u4:6/1206: #0: ffffaf8007229138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:630 [inline] #0: ffffaf8007229138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:658 [inline] #0: ffffaf8007229138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x524/0xffe kernel/workqueue.c:2278 #1: ffffaf800ee9bcf0 ((kfence_timer).work){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:630 [inline] #1: ffffaf800ee9bcf0 ((kfence_timer).work){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:658 [inline] #1: ffffaf800ee9bcf0 ((kfence_timer).work){+.+.}-{0:0}, at: process_one_work+0x524/0xffe kernel/workqueue.c:2278 2 locks held by getty/1981: #0: ffffaf805a4d8098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3a/0x46 drivers/tty/tty_ldsem.c:340 #1: ffff8f8010b082e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xa52/0xbac drivers/tty/n_tty.c:2077 2 locks held by syz-fuzzer/2019: 3 locks held by kworker/1:1/2029: #0: ffffaf800f0e7938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:630 [inline] #0: ffffaf800f0e7938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:658 [inline] #0: ffffaf800f0e7938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x524/0xffe kernel/workqueue.c:2278 #1: ffffaf800bf6bcf0 ((addr_chk_work).work){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:630 [inline] #1: ffffaf800bf6bcf0 ((addr_chk_work).work){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:658 [inline] #1: ffffaf800bf6bcf0 ((addr_chk_work).work){+.+.}-{0:0}, at: process_one_work+0x524/0xffe kernel/workqueue.c:2278 #2: ffffffff855cf108 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x22/0x2a net/core/rtnetlink.c:72 6 locks held by syz-executor.1/2038: 4 locks held by syz-executor.0/2039: #0: ffffaf800c044460 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x104/0x334 fs/read_write.c:586 #1: ffffaf800ee16088 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x1fc/0x32e fs/kernfs/file.c:287 #2: ffffaf800eba8660 (kn->active#124){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x20e/0x32e fs/kernfs/file.c:288 #3: ffffffff8515a428 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: new_device_store+0x106/0x46a drivers/net/netdevsim/bus.c:174 =============================================