INFO: task syz.0.173:5094 blocked for more than 143 seconds. Not tainted 6.1.128-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.0.173 state:D stack:0 pid:5094 ppid:4299 flags:0x00000001 Call trace: __switch_to+0x308/0x598 arch/arm64/kernel/process.c:553 context_switch kernel/sched/core.c:5241 [inline] __schedule+0xef4/0x1d44 kernel/sched/core.c:6558 schedule+0xc4/0x170 kernel/sched/core.c:6634 rwsem_down_write_slowpath+0xc80/0x156c kernel/locking/rwsem.c:1189 __down_write_common kernel/locking/rwsem.c:1314 [inline] __down_write kernel/locking/rwsem.c:1323 [inline] down_write+0x84/0x88 kernel/locking/rwsem.c:1574 inode_lock include/linux/fs.h:758 [inline] open_last_lookups fs/namei.c:3547 [inline] path_openat+0x5ec/0x2548 fs/namei.c:3780 do_filp_open+0x1bc/0x3cc fs/namei.c:3810 do_sys_openat2+0x128/0x3e0 fs/open.c:1318 do_sys_open fs/open.c:1334 [inline] __do_sys_openat fs/open.c:1350 [inline] __se_sys_openat fs/open.c:1345 [inline] __arm64_sys_openat+0x1f0/0x240 fs/open.c:1345 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 Showing all locks held in the system: 1 lock held by rcu_tasks_kthre/12: #0: ffff800015c65530 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x44/0xcf4 kernel/rcu/tasks.h:517 1 lock held by rcu_tasks_trace/13: #0: ffff800015c65d30 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x44/0xcf4 kernel/rcu/tasks.h:517 1 lock held by khungtaskd/28: #0: ffff800015c65360 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:349 2 locks held by kworker/u4:5/1686: #0: ffff0000c0029138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x664/0x1404 kernel/workqueue.c:2265 #1: ffff800025a67c20 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_one_work+0x6a8/0x1404 kernel/workqueue.c:2267 1 lock held by dhcpcd/3966: #0: ffff8000180c5208 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:74 2 locks held by getty/4056: #0: ffff0000d59f2098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80001d8302f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x414/0x1214 drivers/tty/n_tty.c:2198 1 lock held by syz-executor/4295: #0: ffff0000d35700e0 (&type->s_umount_key#66){+.+.}-{3:3}, at: deactivate_super+0xe8/0x110 fs/super.c:362 3 locks held by kworker/1:4/4341: #0: ffff0000c0020938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x664/0x1404 kernel/workqueue.c:2265 #1: ffff8000214f7c20 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work+0x6a8/0x1404 kernel/workqueue.c:2267 #2: ffff0000f27b8240 (&data->fib_lock){+.+.}-{3:3}, at: nsim_fib_event_work+0x270/0x32bc drivers/net/netdevsim/fib.c:1491 2 locks held by kworker/1:6/4372: #0: ffff0000d60a4d38 ((wq_completion)smc_hs_wq){+.+.}-{0:0}, at: process_one_work+0x664/0x1404 kernel/workqueue.c:2265 #1: ffff800021557c20 ((work_completion)(&smc->connect_work)){+.+.}-{0:0}, at: process_one_work+0x6a8/0x1404 kernel/workqueue.c:2267 2 locks held by kworker/1:7/4392: #0: ffff0000d60a4d38 ((wq_completion)smc_hs_wq){+.+.}-{0:0}, at: process_one_work+0x664/0x1404 kernel/workqueue.c:2265 #1: ffff800021857c20 ((work_completion)(&smc->connect_work)){+.+.}-{0:0}, at: process_one_work+0x6a8/0x1404 kernel/workqueue.c:2267 4 locks held by kworker/u4:7/4393: #0: ffff0000c03dd138 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x664/0x1404 kernel/workqueue.c:2265 #1: ffff800021867c20 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x6a8/0x1404 kernel/workqueue.c:2267 #2: ffff8000180b9250 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x13c/0xaec net/core/net_namespace.c:594 #3: ffff8000180c5208 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:74 2 locks held by kworker/u4:12/4556: 2 locks held by kworker/0:10/4672: #0: ffff0000d60a4d38 ((wq_completion)smc_hs_wq){+.+.}-{0:0}, at: process_one_work+0x664/0x1404 kernel/workqueue.c:2265 #1: ffff8000218c7c20 ((work_completion)(&smc->connect_work)){+.+.}-{0:0}, at: process_one_work+0x6a8/0x1404 kernel/workqueue.c:2267 2 locks held by syz.0.173/5085: 1 lock held by syz.0.173/5094: #0: ffff0000e28c4188 (&type->i_mutex_dir_key#18){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #0: ffff0000e28c4188 (&type->i_mutex_dir_key#18){+.+.}-{3:3}, at: open_last_lookups fs/namei.c:3547 [inline] #0: ffff0000e28c4188 (&type->i_mutex_dir_key#18){+.+.}-{3:3}, at: path_openat+0x5ec/0x2548 fs/namei.c:3780 2 locks held by kworker/0:14/6329: #0: ffff0000d60a4d38 ((wq_completion)smc_hs_wq){+.+.}-{0:0}, at: process_one_work+0x664/0x1404 kernel/workqueue.c:2265 #1: ffff800021b07c20 ((work_completion)(&smc->connect_work)){+.+.}-{0:0}, at: process_one_work+0x6a8/0x1404 kernel/workqueue.c:2267 1 lock held by syz-executor/7506: #0: ffff8000180c5208 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:74 [inline] #0: ffff8000180c5208 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x6e8/0xd94 net/core/rtnetlink.c:6147 1 lock held by syz-executor/7671: #0: ffff8000180c5208 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:74 [inline] #0: ffff8000180c5208 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x6e8/0xd94 net/core/rtnetlink.c:6147 1 lock held by syz.4.889/7786: #0: ffff8000180c5208 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:74 =============================================