INFO: task syz.0.86:7112 blocked for more than 144 seconds. Not tainted 6.11.0-rc7-syzkaller-g5f5673607153 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.0.86 state:D stack:0 pid:7112 tgid:7062 ppid:6414 flags:0x00000001 Call trace: __switch_to+0x420/0x6dc arch/arm64/kernel/process.c:603 context_switch kernel/sched/core.c:5188 [inline] __schedule+0x13d4/0x2418 kernel/sched/core.c:6529 __schedule_loop kernel/sched/core.c:6606 [inline] schedule+0xbc/0x238 kernel/sched/core.c:6621 io_schedule+0x8c/0x124 kernel/sched/core.c:7401 folio_wait_bit_common+0x65c/0xb90 mm/filemap.c:1307 folio_wait_bit+0x30/0x40 mm/filemap.c:1446 folio_wait_writeback+0x9c/0x100 mm/page-writeback.c:3189 truncate_inode_pages_range+0xae4/0xf64 mm/truncate.c:398 truncate_inode_pages mm/truncate.c:423 [inline] truncate_pagecache mm/truncate.c:727 [inline] truncate_setsize+0xd4/0x100 mm/truncate.c:752 bchfs_truncate+0x570/0xab0 fs/bcachefs/fs-io.c:460 bch2_setattr+0x198/0x230 fs/bcachefs/fs.c:942 notify_change+0x9f0/0xca0 fs/attr.c:503 do_truncate fs/open.c:65 [inline] do_ftruncate+0x3e4/0x4cc fs/open.c:181 do_sys_ftruncate fs/open.c:199 [inline] __do_sys_ftruncate fs/open.c:207 [inline] __se_sys_ftruncate fs/open.c:205 [inline] __arm64_sys_ftruncate+0x94/0xec fs/open.c:205 __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:712 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598 Showing all locks held in the system: 3 locks held by kworker/1:1/27: #0: ffff0000c0028948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x624/0x15b8 kernel/workqueue.c:3205 #1: ffff8000976c7c20 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work+0x6a0/0x15b8 kernel/workqueue.c:3205 #2: ffff0000ec928240 (&data->fib_lock){+.+.}-{3:3}, at: nsim_fib_event_work+0x270/0x32bc drivers/net/netdevsim/fib.c:1489 1 lock held by khungtaskd/31: #0: ffff80008f74dfa0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:325 3 locks held by kworker/u8:5/235: #0: ffff0000c20e6148 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x624/0x15b8 kernel/workqueue.c:3205 #1: ffff80009b767c20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x6a0/0x15b8 kernel/workqueue.c:3205 #2: ffff0000f01e20e0 (&type->s_umount_key#52){++++}-{3:3}, at: super_trylock_shared+0x28/0xe4 fs/super.c:562 3 locks held by kworker/u8:6/1997: #0: ffff0000c20e6148 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x624/0x15b8 kernel/workqueue.c:3205 #1: ffff80009fc77c20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x6a0/0x15b8 kernel/workqueue.c:3205 #2: ffff0000dbe100e0 (&type->s_umount_key#52){++++}-{3:3}, at: super_trylock_shared+0x28/0xe4 fs/super.c:562 2 locks held by getty/6177: #0: ffff0000d24cb0a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80009b54b2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x41c/0x1228 drivers/tty/n_tty.c:2211 3 locks held by syz-executor/6420: #0: ffff0000f01e2420 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:515 #1: ffff0000f11042c0 (&c->btree_trans_barrier){.+.+}-{0:0}, at: srcu_lock_acquire+0x18/0x54 include/linux/srcu.h:150 #2: ffff0000f1126690 (&c->gc_lock){++++}-{3:3}, at: bch2_btree_update_start+0x588/0x15ac fs/bcachefs/btree_update_interior.c:1197 2 locks held by bch-reclaim/loo/7015: 1 lock held by syz.0.86/7111: #0: ffff0000dbe10420 (sb_writers#12){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2882 [inline] #0: ffff0000dbe10420 (sb_writers#12){.+.+}-{0:0}, at: vfs_write+0x368/0xc80 fs/read_write.c:586 2 locks held by syz.0.86/7112: #0: ffff0000dbe10420 (sb_writers#12){.+.+}-{0:0}, at: do_ftruncate+0x1e4/0x4cc fs/open.c:178 #1: ffff0000eee7c3a8 (&sb->s_type->i_mutex_key#20){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:800 [inline] #1: ffff0000eee7c3a8 (&sb->s_type->i_mutex_key#20){+.+.}-{3:3}, at: do_truncate fs/open.c:63 [inline] #1: ffff0000eee7c3a8 (&sb->s_type->i_mutex_key#20){+.+.}-{3:3}, at: do_ftruncate+0x3d0/0x4cc fs/open.c:181 1 lock held by bch-copygc/loop/7101: 6 locks held by syz-executor/8361: #0: ffff0000d7f6a420 (sb_writers#7){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2882 [inline] #0: ffff0000d7f6a420 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x368/0xc80 fs/read_write.c:586 #1: ffff0000cb4b1c88 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x1c8/0x48c fs/kernfs/file.c:325 #2: ffff0000ccc43e18 (kn->active#45){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x1e4/0x48c fs/kernfs/file.c:326 #3: ffff800091592148 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: del_device_store+0xec/0x39c drivers/net/netdevsim/bus.c:216 #4: ffff0000c2d080e8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1009 [inline] #4: ffff0000c2d080e8 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1094 [inline] #4: ffff0000c2d080e8 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal+0xbc/0x698 drivers/base/dd.c:1292 #5: ffff0000c2d09250 (&devlink->lock_key#14){+.+.}-{3:3}, at: devl_lock+0x24/0x34 net/devlink/core.c:276 4 locks held by syz.1.326/8683: 1 lock held by syz.0.327/8672: #0: ffff0000d3e6c188 (&mm->mmap_lock){++++}-{3:3}, at: mmap_write_lock_killable include/linux/mmap_lock.h:122 [inline] #0: ffff0000d3e6c188 (&mm->mmap_lock){++++}-{3:3}, at: vm_mmap_pgoff+0x154/0x38c mm/util.c:586 1 lock held by syz.0.327/8677: 1 lock held by sed/8692: =============================================