INFO: task kworker/1:5:6554 blocked for more than 143 seconds. Not tainted 6.15.0-rc7-syzkaller-gd7fa1af5b33e #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:5 state:D stack:0 pid:6554 tgid:6554 ppid:2 task_flags:0x4208060 flags:0x00000010 Workqueue: events p9_write_work Call trace: __switch_to+0x414/0x834 arch/arm64/kernel/process.c:735 (T) context_switch kernel/sched/core.c:5382 [inline] __schedule+0x13b0/0x28d4 kernel/sched/core.c:6767 __schedule_loop kernel/sched/core.c:6845 [inline] schedule+0xb4/0x230 kernel/sched/core.c:6860 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6917 __mutex_lock_common+0xbd0/0x2190 kernel/locking/mutex.c:678 __mutex_lock kernel/locking/mutex.c:746 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:798 anon_pipe_write+0x130/0xfa0 fs/pipe.c:459 __kernel_write_iter+0x2b8/0x6c8 fs/read_write.c:617 __kernel_write fs/read_write.c:637 [inline] kernel_write+0x18c/0x28c fs/read_write.c:658 p9_fd_write net/9p/trans_fd.c:434 [inline] p9_write_work+0x450/0xc20 net/9p/trans_fd.c:485 process_one_work+0x7e8/0x156c kernel/workqueue.c:3238 process_scheduled_works kernel/workqueue.c:3319 [inline] worker_thread+0x958/0xed8 kernel/workqueue.c:3400 kthread+0x5fc/0x75c kernel/kthread.c:464 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:847 INFO: task syz.2.241:7231 blocked for more than 143 seconds. Not tainted 6.15.0-rc7-syzkaller-gd7fa1af5b33e #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.2.241 state:D stack:0 pid:7231 tgid:7223 ppid:6492 task_flags:0x400040 flags:0x00000019 Call trace: __switch_to+0x414/0x834 arch/arm64/kernel/process.c:735 (T) context_switch kernel/sched/core.c:5382 [inline] __schedule+0x13b0/0x28d4 kernel/sched/core.c:6767 __schedule_loop kernel/sched/core.c:6845 [inline] schedule+0xb4/0x230 kernel/sched/core.c:6860 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6917 rwsem_down_write_slowpath+0xa80/0x10f0 kernel/locking/rwsem.c:1176 __down_write_common kernel/locking/rwsem.c:1304 [inline] __down_write kernel/locking/rwsem.c:1313 [inline] down_write+0xb4/0xc0 kernel/locking/rwsem.c:1578 filemap_invalidate_lock include/linux/fs.h:912 [inline] filemap_invalidate_inode+0x118/0x2f8 mm/filemap.c:4313 netfs_unbuffered_write_iter+0x304/0x654 fs/netfs/direct_write.c:186 v9fs_file_write_iter+0xa4/0xd8 fs/9p/vfs_file.c:404 new_sync_write fs/read_write.c:591 [inline] vfs_write+0x62c/0x97c fs/read_write.c:684 ksys_write+0x120/0x210 fs/read_write.c:736 __do_sys_write fs/read_write.c:747 [inline] __se_sys_write fs/read_write.c:744 [inline] __arm64_sys_write+0x7c/0x90 fs/read_write.c:744 __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+0x58/0x17c arch/arm64/kernel/entry-common.c:767 el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:786 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 Showing all locks held in the system: 1 lock held by khungtaskd/32: #0: ffff80008f508920 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire+0x4/0x48 include/linux/rcupdate.h:330 2 locks held by pr/ttyAMA0/46: 2 locks held by getty/6265: #0: ffff0000d2fae0a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80009b5be2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x34c/0xfa0 drivers/tty/n_tty.c:2222 3 locks held by kworker/1:5/6554: #0: ffff0000c0028d48 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x658/0x156c kernel/workqueue.c:3212 #1: ffff8000a0d17bc0 ((work_completion)(&m->wq)){+.+.}-{0:0}, at: process_one_work+0x6ec/0x156c kernel/workqueue.c:3212 #2: ffff0000d302f468 (&pipe->mutex){+.+.}-{4:4}, at: anon_pipe_write+0x130/0xfa0 fs/pipe.c:459 3 locks held by kworker/1:6/6624: #0: ffff0000c0028d48 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x658/0x156c kernel/workqueue.c:3212 #1: ffff8000a0b57bc0 ((work_completion)(&uhid->worker)){+.+.}-{0:0}, at: process_one_work+0x6ec/0x156c kernel/workqueue.c:3212 #2: ffff8000927f5868 (uevent_sock_mutex){+.+.}-{4:4}, at: uevent_net_broadcast_untagged lib/kobject_uevent.c:317 [inline] #2: ffff8000927f5868 (uevent_sock_mutex){+.+.}-{4:4}, at: kobject_uevent_net_broadcast+0x24c/0x548 lib/kobject_uevent.c:410 2 locks held by syz.2.241/7225: #0: ffff0000d302f468 (&pipe->mutex){+.+.}-{4:4}, at: anon_pipe_write+0x130/0xfa0 fs/pipe.c:459 #1: ffff0000dd4f02e8 (mapping.invalidate_lock#4){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:922 [inline] #1: ffff0000dd4f02e8 (mapping.invalidate_lock#4){++++}-{4:4}, at: filemap_fault+0x964/0x1278 mm/filemap.c:3410 4 locks held by syz.2.241/7231: #0: ffff0000cc22f0b8 (&f->f_pos_lock){+.+.}-{4:4}, at: fdget_pos+0x1fc/0x2a0 fs/file.c:1213 #1: ffff0000f8c8e420 (sb_writers#23){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3041 [inline] #1: ffff0000f8c8e420 (sb_writers#23){.+.+}-{0:0}, at: vfs_write+0x244/0x97c fs/read_write.c:680 #2: ffff0000dd4f0148 (&sb->s_type->i_mutex_key#30){++++}-{4:4}, at: netfs_start_io_direct+0x1a4/0x234 fs/netfs/locking.c:188 #3: ffff0000dd4f02e8 (mapping.invalidate_lock#4){++++}-{4:4}, at: filemap_invalidate_lock include/linux/fs.h:912 [inline] #3: ffff0000dd4f02e8 (mapping.invalidate_lock#4){++++}-{4:4}, at: filemap_invalidate_inode+0x118/0x2f8 mm/filemap.c:4313 2 locks held by udevd/9057: #0: ffff0000c14a07b0 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:877 [inline] #0: ffff0000c14a07b0 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: blkdev_read_iter+0x2a0/0x3dc block/fops.c:808 #1: ffff0000c14a0950 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:922 [inline] #1: ffff0000c14a0950 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_update_page mm/filemap.c:2451 [inline] #1: ffff0000c14a0950 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_get_pages+0x594/0x19d0 mm/filemap.c:2613 1 lock held by syz.2.768/9476: 2 locks held by syz.3.780/9508: 2 locks held by syz.4.785/9530: 1 lock held by dhcpcd-run-hook/9529: =============================================