INFO: task syz.2.49:6845 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.2.49 state:D stack:0 pid:6845 tgid:6792 ppid:6413 flags:0x00000005 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 __filemap_fdatawait_range+0x16c/0x304 mm/filemap.c:532 filemap_write_and_wait_range+0x1a4/0x23c mm/filemap.c:694 bch2_write_invalidate_inode_pages_range+0x7c/0x120 fs/bcachefs/fs-io-pagecache.c:61 bch2_direct_write+0x26c0/0x2990 fs/bcachefs/fs-io-direct.c:647 bch2_write_iter+0x16c/0x2804 fs/bcachefs/fs-io-buffered.c:1043 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 Showing all locks held in the system: 4 locks held by kworker/u8:0/11: 4 locks held by kworker/u8:1/13: #0: ffff0000d1891948 ((wq_completion)btree_node_rewrite){+.+.}-{0:0}, at: process_one_work+0x624/0x15b8 kernel/workqueue.c:3205 #1: ffff8000975d7c20 ((work_completion)(&a->work)){+.+.}-{0:0}, at: process_one_work+0x6a0/0x15b8 kernel/workqueue.c:3205 #2: ffff0000dc3842c0 (&c->btree_trans_barrier){.+.+}-{0:0}, at: srcu_lock_acquire+0x18/0x54 include/linux/srcu.h:150 #3: ffff0000dc3a6690 (&c->gc_lock){++++}-{3:3}, at: bch2_btree_update_start+0x588/0x15ac fs/bcachefs/btree_update_interior.c:1197 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/u8:3/44: 2 locks held by kworker/u8:7/4677: #0: ffff0000c257d148 ((wq_completion)iou_exit){+.+.}-{0:0}, at: process_one_work+0x624/0x15b8 kernel/workqueue.c:3205 #1: ffff8000a07b7c20 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work+0x6a0/0x15b8 kernel/workqueue.c:3205 1 lock held by udevd/6024: 2 locks held by getty/6169: #0: ffff0000d30430a0 (&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 1 lock held by syz.2.49/6795: #0: ffff0000e997c420 (sb_writers#20){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2882 [inline] #0: ffff0000e997c420 (sb_writers#20){.+.+}-{0:0}, at: vfs_writev+0x3a8/0xb80 fs/read_write.c:969 2 locks held by syz.2.49/6844: #0: ffff0000e9a7f748 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x218/0x2a4 fs/file.c:1187 #1: ffff0000e997c420 (sb_writers#20){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2882 [inline] #1: ffff0000e997c420 (sb_writers#20){.+.+}-{0:0}, at: vfs_write+0x368/0xc80 fs/read_write.c:586 1 lock held by syz.2.49/6845: #0: ffff0000e997c420 (sb_writers#20){.+.+}-{0:0}, at: direct_splice_actor+0x54/0x1d8 fs/splice.c:1163 2 locks held by syz.4.261/8114: #0: ffff0000e997c0e0 (&type->s_umount_key#75){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff0000e997c0e0 (&type->s_umount_key#75){++++}-{3:3}, at: super_lock+0x244/0x33c fs/super.c:120 #1: ffff0000e997c938 (&s->s_sync_lock){+.+.}-{3:3}, at: wait_sb_inodes fs/fs-writeback.c:2612 [inline] #1: ffff0000e997c938 (&s->s_sync_lock){+.+.}-{3:3}, at: sync_inodes_sb+0x2a8/0x944 fs/fs-writeback.c:2795 1 lock held by syz.2.724/10404: =============================================