INFO: task kworker/u8:6:614 blocked for more than 143 seconds. Not tainted 6.11.0-rc7-syzkaller-g5f5673607153 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u8:6 state:D stack:0 pid:614 tgid:614 ppid:2 flags:0x00000008 Workqueue: writeback wb_workfn (flush-bcachefs-1) 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_lock+0x2c/0x3c mm/filemap.c:1645 folio_lock include/linux/pagemap.h:1050 [inline] writeback_get_folio mm/page-writeback.c:2496 [inline] writeback_iter+0x6f0/0x1110 mm/page-writeback.c:2590 write_cache_pages+0xb0/0x20c mm/page-writeback.c:2639 bch2_writepages+0x13c/0x304 fs/bcachefs/fs-io-buffered.c:650 do_writepages+0x304/0x7cc mm/page-writeback.c:2683 __writeback_single_inode+0x158/0x14e4 fs/fs-writeback.c:1651 writeback_sb_inodes+0x7dc/0x1190 fs/fs-writeback.c:1947 __writeback_inodes_wb+0xec/0x234 fs/fs-writeback.c:2018 wb_writeback+0x42c/0x1040 fs/fs-writeback.c:2129 wb_check_background_flush fs/fs-writeback.c:2199 [inline] wb_do_writeback fs/fs-writeback.c:2287 [inline] wb_workfn+0xc2c/0x104c fs/fs-writeback.c:2314 process_one_work+0x79c/0x15b8 kernel/workqueue.c:3231 process_scheduled_works kernel/workqueue.c:3312 [inline] worker_thread+0x978/0xec4 kernel/workqueue.c:3389 kthread+0x288/0x310 kernel/kthread.c:389 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860 INFO: task syz.3.4:6515 blocked for more than 143 seconds. Not tainted 6.11.0-rc7-syzkaller-g5f5673607153 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.3.4 state:D stack:0 pid:6515 tgid:6492 ppid:6417 flags:0x00000009 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 mm/page-writeback.c:3189 [inline] folio_prepare_writeback mm/page-writeback.c:2455 [inline] writeback_get_folio mm/page-writeback.c:2497 [inline] writeback_iter+0x89c/0x1110 mm/page-writeback.c:2590 write_cache_pages+0x130/0x20c mm/page-writeback.c:2639 bch2_writepages+0x13c/0x304 fs/bcachefs/fs-io-buffered.c:650 do_writepages+0x304/0x7cc mm/page-writeback.c:2683 filemap_fdatawrite_wbc+0x124/0x174 mm/filemap.c:397 __filemap_fdatawrite_range mm/filemap.c:430 [inline] file_write_and_wait_range+0x178/0x260 mm/filemap.c:788 bch2_fsync+0x14c/0x44c fs/bcachefs/fs-io.c:199 vfs_fsync_range+0x168/0x188 fs/sync.c:188 generic_write_sync include/linux/fs.h:2822 [inline] bch2_write_iter+0x24d4/0x2804 fs/bcachefs/fs-io-buffered.c:1068 iter_file_splice_write+0x894/0xfc0 fs/splice.c:743 do_splice_from fs/splice.c:941 [inline] direct_splice_actor+0xec/0x1d8 fs/splice.c:1164 splice_direct_to_actor+0x438/0xa0c fs/splice.c:1108 do_splice_direct_actor fs/splice.c:1207 [inline] do_splice_direct+0x1e4/0x304 fs/splice.c:1233 do_sendfile+0x46c/0xbd0 fs/read_write.c:1295 __do_sys_sendfile64 fs/read_write.c:1362 [inline] __se_sys_sendfile64 fs/read_write.c:1348 [inline] __arm64_sys_sendfile64+0x160/0x3ac fs/read_write.c:1348 __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 INFO: task syz.3.4:6516 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.3.4 state:D stack:0 pid:6516 tgid:6492 ppid:6417 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_partial_folio+0x13c/0x74c mm/truncate.c:208 truncate_inode_pages_range+0x594/0xf64 mm/truncate.c:354 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 INFO: task syz.3.4:6517 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.3.4 state:D stack:0 pid:6517 tgid:6492 ppid:6417 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 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6678 rwsem_down_write_slowpath+0xd10/0x14c8 kernel/locking/rwsem.c:1178 __down_write_common kernel/locking/rwsem.c:1306 [inline] __down_write kernel/locking/rwsem.c:1315 [inline] down_write+0xb4/0xc0 kernel/locking/rwsem.c:1580 inode_lock include/linux/fs.h:800 [inline] do_truncate+0x1ac/0x28c fs/open.c:63 vfs_truncate+0x2b8/0x360 fs/open.c:111 do_sys_truncate+0xe8/0x1ac fs/open.c:134 __do_sys_truncate fs/open.c:146 [inline] __se_sys_truncate fs/open.c:144 [inline] __arm64_sys_truncate+0x5c/0x70 fs/open.c:144 __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: 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/u8:6/614: #0: ffff0000c2066948 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x624/0x15b8 kernel/workqueue.c:3205 #1: ffff80009cd37c20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x6a0/0x15b8 kernel/workqueue.c:3205 #2: ffff0000f12aa0e0 (&type->s_umount_key#54){++++}-{3:3}, at: super_trylock_shared+0x28/0xe4 fs/super.c:562 2 locks held by getty/6176: #0: ffff0000c19620a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80009b52e2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x41c/0x1228 drivers/tty/n_tty.c:2211 3 locks held by kworker/u9:6/6426: #0: ffff0000d18f9148 ((wq_completion)hci5){+.+.}-{0:0}, at: process_one_work+0x624/0x15b8 kernel/workqueue.c:3205 #1: ffff80009d4c7c20 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_one_work+0x6a0/0x15b8 kernel/workqueue.c:3205 #2: ffff0000e0b64d80 (&hdev->req_lock){+.+.}-{3:3}, at: hci_cmd_sync_work+0x194/0x34c net/bluetooth/hci_sync.c:327 1 lock held by syz.3.4/6493: #0: ffff0000f12aa420 (sb_writers#12){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2882 [inline] #0: ffff0000f12aa420 (sb_writers#12){.+.+}-{0:0}, at: vfs_writev+0x3a8/0xb80 fs/read_write.c:969 1 lock held by syz.3.4/6515: #0: ffff0000f12aa420 (sb_writers#12){.+.+}-{0:0}, at: direct_splice_actor+0x54/0x1d8 fs/splice.c:1163 2 locks held by syz.3.4/6516: #0: ffff0000f12aa420 (sb_writers#12){.+.+}-{0:0}, at: do_ftruncate+0x1e4/0x4cc fs/open.c:178 #1: ffff0000efd408a8 (&sb->s_type->i_mutex_key#19){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:800 [inline] #1: ffff0000efd408a8 (&sb->s_type->i_mutex_key#19){+.+.}-{3:3}, at: do_truncate fs/open.c:63 [inline] #1: ffff0000efd408a8 (&sb->s_type->i_mutex_key#19){+.+.}-{3:3}, at: do_ftruncate+0x3d0/0x4cc fs/open.c:181 2 locks held by syz.3.4/6517: #0: ffff0000f12aa420 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:515 #1: ffff0000efd408a8 (&sb->s_type->i_mutex_key#19){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:800 [inline] #1: ffff0000efd408a8 (&sb->s_type->i_mutex_key#19){+.+.}-{3:3}, at: do_truncate+0x1ac/0x28c fs/open.c:63 3 locks held by kworker/0:7/6501: #0: ffff0000c0028948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x624/0x15b8 kernel/workqueue.c:3205 #1: ffff8000af4e7c20 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work+0x6a0/0x15b8 kernel/workqueue.c:3205 #2: ffff0000f0fa9240 (&data->fib_lock){+.+.}-{3:3}, at: nsim_fib_event_work+0x270/0x32bc drivers/net/netdevsim/fib.c:1489 3 locks held by bch-reclaim/loo/6510: 2 locks held by syz.4.196/7361: #0: ffff0000f12aa0e0 (&type->s_umount_key#54){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff0000f12aa0e0 (&type->s_umount_key#54){++++}-{3:3}, at: super_lock+0x244/0x33c fs/super.c:120 #1: ffff0000f12ac7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:388 [inline] #1: ffff0000f12ac7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x208/0x944 fs/fs-writeback.c:2790 1 lock held by syz.3.558/9184: #0: ffff0000dcdb6808 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:800 [inline] #0: ffff0000dcdb6808 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: __sock_release net/socket.c:658 [inline] #0: ffff0000dcdb6808 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: sock_close+0x80/0x1e8 net/socket.c:1421 =============================================