INFO: task syz.2.64:6880 blocked for more than 143 seconds. Not tainted 6.14.0-rc3-syzkaller-ge6747d19291c #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.2.64 state:D stack:0 pid:6880 tgid:6870 ppid:6441 task_flags:0x400140 flags:0x00000001 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 rwsem_down_read_slowpath+0x534/0x858 kernel/locking/rwsem.c:1084 __down_read_common kernel/locking/rwsem.c:1248 [inline] __down_read kernel/locking/rwsem.c:1261 [inline] down_read+0xa0/0x2fc kernel/locking/rwsem.c:1526 inode_lock_shared include/linux/fs.h:887 [inline] lookup_slow+0x50/0x84 fs/namei.c:1809 walk_component fs/namei.c:2114 [inline] link_path_walk+0x77c/0xc48 fs/namei.c:2479 path_parentat fs/namei.c:2683 [inline] __filename_parentat+0x214/0x60c fs/namei.c:2707 filename_parentat fs/namei.c:2725 [inline] filename_create+0xf0/0x468 fs/namei.c:4063 do_mknodat+0x188/0x56c fs/namei.c:4228 __do_sys_mknodat fs/namei.c:4269 [inline] __se_sys_mknodat fs/namei.c:4266 [inline] __arm64_sys_mknodat+0xac/0xc8 fs/namei.c:4266 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 Showing all locks held in the system: 3 locks held by kworker/1:0/25: #0: ffff0000c0028d48 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x674/0x1638 kernel/workqueue.c:3210 #1: ffff800097e27ba0 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work+0x708/0x1638 kernel/workqueue.c:3210 #2: ffff0000ea736240 (&data->fib_lock){+.+.}-{4:4}, at: nsim_fib_event_work+0x270/0x31e8 drivers/net/netdevsim/fib.c:1490 3 locks held by kworker/1:1/27: #0: ffff0000c0028d48 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x674/0x1638 kernel/workqueue.c:3210 #1: ffff800097e47ba0 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work+0x708/0x1638 kernel/workqueue.c:3210 #2: ffff0000e6287240 (&data->fib_lock){+.+.}-{4:4}, at: nsim_fib_event_work+0x270/0x31e8 drivers/net/netdevsim/fib.c:1490 1 lock held by khungtaskd/31: #0: ffff80008fda2220 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:336 3 locks held by kworker/u8:5/422: #0: ffff0000d22df948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x674/0x1638 kernel/workqueue.c:3210 #1: ffff80009c6e7ba0 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x708/0x1638 kernel/workqueue.c:3210 #2: ffff800092b71168 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:79 3 locks held by kworker/1:2/2269: #0: ffff0000c0028d48 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x674/0x1638 kernel/workqueue.c:3210 #1: ffff8000a0ee7ba0 (deferred_process_work){+.+.}-{0:0}, at: process_one_work+0x708/0x1638 kernel/workqueue.c:3210 #2: ffff800092b71168 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:79 4 locks held by kworker/u8:7/3610: #0: ffff0000c1899948 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x674/0x1638 kernel/workqueue.c:3210 #1: ffff8000a2977ba0 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x708/0x1638 kernel/workqueue.c:3210 #2: ffff800092b64a50 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0x148/0xa48 net/core/net_namespace.c:606 #3: ffff800092b71168 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:79 1 lock held by dhcpcd/6112: #0: ffff800092b71168 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:79 2 locks held by getty/6210: #0: ffff0000d6d920a0 (&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 2 locks held by syz.2.64/6878: 1 lock held by syz.2.64/6880: #0: ffff0000f1644180 (&type->i_mutex_dir_key#15){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:887 [inline] #0: ffff0000f1644180 (&type->i_mutex_dir_key#15){++++}-{4:4}, at: lookup_slow+0x50/0x84 fs/namei.c:1809 1 lock held by syz-executor/9048: #0: ffff800092b71168 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:79 7 locks held by syz-executor/9061: #0: ffff0000d7772420 (sb_writers#7){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3035 [inline] #0: ffff0000d7772420 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x248/0xa9c fs/read_write.c:675 #1: ffff0000d3aabc88 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1c8/0x48c fs/kernfs/file.c:325 #2: ffff0000c99c31e8 (kn->active#44){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x1e4/0x48c fs/kernfs/file.c:326 #3: ffff800091cb6688 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: del_device_store+0xec/0x39c drivers/net/netdevsim/bus.c:216 #4: ffff0001149110e8 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1030 [inline] #4: ffff0001149110e8 (&dev->mutex){....}-{4:4}, at: __device_driver_lock drivers/base/dd.c:1095 [inline] #4: ffff0001149110e8 (&dev->mutex){....}-{4:4}, at: device_release_driver_internal+0xbc/0x698 drivers/base/dd.c:1293 #5: ffff000114915250 (&devlink->lock_key#15){+.+.}-{4:4}, at: devl_lock+0x24/0x34 net/devlink/core.c:276 #6: ffff800092b71168 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:79 4 locks held by syz-executor/9112: #0: ffff0000d7772420 (sb_writers#7){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3035 [inline] #0: ffff0000d7772420 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x248/0xa9c fs/read_write.c:675 #1: ffff0000ef269088 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1c8/0x48c fs/kernfs/file.c:325 #2: ffff0000c99c31e8 (kn->active#44){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x1e4/0x48c fs/kernfs/file.c:326 #3: ffff800091cb6688 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: del_device_store+0xec/0x39c drivers/net/netdevsim/bus.c:216 1 lock held by syz.4.477/9314: #0: ffff800092b71168 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:79 3 locks held by syz.8.480/9333: =============================================