INFO: task kworker/u8:2:44 blocked for more than 144 seconds. Not tainted 6.15.0-rc1-syzkaller-g0af2f6be1b42 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u8:2 state:D stack:0 pid:44 tgid:44 ppid:2 task_flags:0x4248060 flags:0x00000008 Workqueue: xfs_iwalk-9172 xfs_pwork_work Call trace: __switch_to+0x414/0x788 arch/arm64/kernel/process.c:701 (T) context_switch kernel/sched/core.c:5382 [inline] __schedule+0x16a4/0x2c80 kernel/sched/core.c:6767 __schedule_loop kernel/sched/core.c:6845 [inline] schedule+0xbc/0x238 kernel/sched/core.c:6860 schedule_timeout+0xb4/0x2ac kernel/time/sleep_timeout.c:75 do_wait_for_common+0x310/0x47c kernel/sched/completion.c:95 __wait_for_common kernel/sched/completion.c:116 [inline] wait_for_common kernel/sched/completion.c:127 [inline] wait_for_completion+0x48/0x60 kernel/sched/completion.c:148 xfs_buf_iowait+0x10c/0x5c8 fs/xfs/xfs_buf.c:1408 _xfs_buf_read fs/xfs/xfs_buf.c:645 [inline] xfs_buf_read_map+0x37c/0xab4 fs/xfs/xfs_buf.c:711 xfs_trans_read_buf_map+0x20c/0xae8 fs/xfs/xfs_trans_buf.c:304 xfs_trans_read_buf fs/xfs/xfs_trans.h:212 [inline] xfs_btree_read_buf_block+0x274/0x434 fs/xfs/libxfs/xfs_btree.c:1402 xfs_btree_lookup_get_block+0x2a8/0x500 fs/xfs/libxfs/xfs_btree.c:1907 xfs_btree_lookup+0x438/0x12d4 fs/xfs/libxfs/xfs_btree.c:2018 xfs_alloc_lookup fs/xfs/libxfs/xfs_alloc.c:166 [inline] xfs_alloc_lookup_eq fs/xfs/libxfs/xfs_alloc.c:184 [inline] xfs_alloc_fixup_trees+0x21c/0xdbc fs/xfs/libxfs/xfs_alloc.c:626 xfs_alloc_cur_finish+0xc4/0x51c fs/xfs/libxfs/xfs_alloc.c:1117 xfs_alloc_ag_vextent_near+0x102c/0x16c4 fs/xfs/libxfs/xfs_alloc.c:1776 xfs_alloc_vextent_iterate_ags+0x65c/0xa5c fs/xfs/libxfs/xfs_alloc.c:3739 xfs_alloc_vextent_start_ag+0x358/0x8ac fs/xfs/libxfs/xfs_alloc.c:3814 xfs_bmap_btalloc_best_length fs/xfs/libxfs/xfs_bmap.c:3622 [inline] xfs_bmap_btalloc fs/xfs/libxfs/xfs_bmap.c:3667 [inline] xfs_bmapi_allocate+0x14b4/0x2b54 fs/xfs/libxfs/xfs_bmap.c:3942 xfs_bmapi_write+0x95c/0x1634 fs/xfs/libxfs/xfs_bmap.c:4271 xfs_dquot_disk_alloc+0x510/0xc0c fs/xfs/xfs_dquot.c:381 xfs_qm_dqread+0x1b0/0x718 fs/xfs/xfs_dquot.c:720 xfs_qm_dqget+0x274/0x670 fs/xfs/xfs_dquot.c:932 xfs_qm_quotacheck_dqadjust+0xe0/0x628 fs/xfs/xfs_qm.c:1333 xfs_qm_dqusage_adjust+0x550/0x764 fs/xfs/xfs_qm.c:1459 xfs_iwalk_ag_recs+0x43c/0x828 fs/xfs/xfs_iwalk.c:209 xfs_iwalk_run_callbacks+0x1c0/0x3f4 fs/xfs/xfs_iwalk.c:370 xfs_iwalk_ag+0x8cc/0x9c0 fs/xfs/xfs_iwalk.c:476 xfs_iwalk_ag_work+0x10c/0x1a8 fs/xfs/xfs_iwalk.c:625 xfs_pwork_work+0x80/0x1a4 fs/xfs/xfs_pwork.c:47 process_one_work+0x810/0x1638 kernel/workqueue.c:3238 process_scheduled_works kernel/workqueue.c:3319 [inline] worker_thread+0x97c/0xf08 kernel/workqueue.c:3400 kthread+0x674/0x7dc kernel/kthread.c:464 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:862 INFO: task syz.1.933:9215 blocked for more than 145 seconds. Not tainted 6.15.0-rc1-syzkaller-g0af2f6be1b42 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.1.933 state:D stack:0 pid:9215 tgid:9212 ppid:6477 task_flags:0x400140 flags:0x00000009 Call trace: __switch_to+0x414/0x788 arch/arm64/kernel/process.c:701 (T) context_switch kernel/sched/core.c:5382 [inline] __schedule+0x16a4/0x2c80 kernel/sched/core.c:6767 __schedule_loop kernel/sched/core.c:6845 [inline] schedule+0xbc/0x238 kernel/sched/core.c:6860 io_schedule+0x8c/0x124 kernel/sched/core.c:7742 bit_wait_io+0x1c/0xac kernel/sched/wait_bit.c:247 __wait_on_bit kernel/sched/wait_bit.c:49 [inline] out_of_line_wait_on_bit+0x208/0x334 kernel/sched/wait_bit.c:64 wait_on_bit_io include/linux/wait_bit.h:105 [inline] __wait_on_buffer fs/buffer.c:123 [inline] wait_on_buffer include/linux/buffer_head.h:413 [inline] __bread_slow fs/buffer.c:1265 [inline] __bread_gfp+0x200/0x34c fs/buffer.c:1488 sb_bread include/linux/buffer_head.h:345 [inline] exfat_verify_boot_region fs/exfat/super.c:565 [inline] __exfat_fill_super fs/exfat/super.c:612 [inline] exfat_fill_super+0xb18/0x2110 fs/exfat/super.c:668 get_tree_bdev_flags+0x38c/0x494 fs/super.c:1636 get_tree_bdev+0x2c/0x3c fs/super.c:1659 exfat_get_tree+0x28/0x38 fs/exfat/super.c:735 vfs_get_tree+0x90/0x28c fs/super.c:1759 do_new_mount+0x278/0x900 fs/namespace.c:3879 path_mount+0x590/0xe04 fs/namespace.c:4206 do_mount fs/namespace.c:4219 [inline] __do_sys_mount fs/namespace.c:4430 [inline] __se_sys_mount fs/namespace.c:4407 [inline] __arm64_sys_mount+0x4f4/0x5d0 fs/namespace.c:4407 __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:744 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 Showing all locks held in the system: 1 lock held by kthreadd/2: 3 locks held by kworker/u8:0/12: 3 locks held by kworker/u8:1/13: 1 lock held by khungtaskd/32: #0: ffff800090127de0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire+0x4/0x48 include/linux/rcupdate.h:330 4 locks held by kworker/u8:2/44: #0: ffff0000f2fd9148 ((wq_completion)xfs_iwalk-9172){+.+.}-{0:0}, at: process_one_work+0x674/0x1638 kernel/workqueue.c:3212 #1: ffff800098947b80 ((work_completion)(&pwork->work)){+.+.}-{0:0}, at: process_one_work+0x708/0x1638 kernel/workqueue.c:3212 #2: ffff0000d7334610 (sb_internal#2){.+.+}-{0:0}, at: xfs_dquot_disk_alloc+0x304/0xc0c fs/xfs/xfs_dquot.c:358 #3: ffff0000db174e98 (&xfs_nondir_ilock_class){++++}-{4:4}, at: xfs_ilock+0x1f0/0x418 fs/xfs/xfs_inode.c:165 3 locks held by kworker/u8:3/45: 2 locks held by pr/ttyAMA0/46: 3 locks held by kworker/u8:4/327: 3 locks held by kworker/u8:5/493: 3 locks held by kworker/u8:6/531: 3 locks held by kworker/u8:7/587: 3 locks held by kworker/u8:8/662: 1 lock held by hwrng/1413: 2 locks held by kworker/1:1H/1959: #0: ffff0000c20b6548 ((wq_completion)kblockd){+.+.}-{0:0}, at: process_one_work+0x674/0x1638 kernel/workqueue.c:3212 #1: ffff8000a0a77b80 ((work_completion)(&q->timeout_work)){+.+.}-{0:0}, at: process_one_work+0x708/0x1638 kernel/workqueue.c:3212 2 locks held by kworker/R-bat_e/4208: 2 locks held by syslogd/6072: 1 lock held by udevd/6087: 2 locks held by dhcpcd/6140: 2 locks held by dhcpcd/6141: 2 locks held by getty/6224: #0: ffff0000d32930a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80009c1eb2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x46c/0x123c drivers/tty/n_tty.c:2222 1 lock held by syz-executor/6466: 1 lock held by syz-executor/6483: 3 locks held by syz-executor/6486: 4 locks held by syz-executor/6488: 1 lock held by syz.4.918/9172: #0: ffff0000d73340e0 (&type->s_umount_key#50/1){+.+.}-{4:4}, at: alloc_super+0x1b0/0x834 fs/super.c:344 1 lock held by syz.1.933/9215: #0: ffff0000d76220e0 (&type->s_umount_key#85/1){+.+.}-{4:4}, at: alloc_super+0x1b0/0x834 fs/super.c:344 3 locks held by kworker/u8:9/9216: 3 locks held by kworker/u8:10/9217: =============================================