INFO: task kworker/u4:6:287 blocked for more than 143 seconds.
Not tainted 6.6.0-rc7-syzkaller-g8de1e7afcc1c #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:6 state:D stack:0 pid:287 ppid:2 flags:0x00000008
Workqueue: writeback wb_workfn (flush-btrfs-42)
Call trace:
__switch_to+0x314/0x560 arch/arm64/kernel/process.c:556
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x1364/0x23b4 kernel/sched/core.c:6695
schedule+0xc4/0x170 kernel/sched/core.c:6771
io_schedule+0x8c/0x12c kernel/sched/core.c:9026
folio_wait_bit_common+0x65c/0xb90 mm/filemap.c:1301
__folio_lock+0x2c/0x3c mm/filemap.c:1629
folio_lock include/linux/pagemap.h:1042 [inline]
extent_write_cache_pages fs/btrfs/extent_io.c:2078 [inline]
extent_writepages+0xa00/0x1f3c fs/btrfs/extent_io.c:2226
btrfs_writepages+0x28/0x38 fs/btrfs/inode.c:7821
do_writepages+0x2e8/0x570 mm/page-writeback.c:2553
__writeback_single_inode+0x148/0x146c fs/fs-writeback.c:1608
writeback_sb_inodes+0x718/0x1010 fs/fs-writeback.c:1899
__writeback_inodes_wb+0xec/0x234 fs/fs-writeback.c:1970
wb_writeback+0x408/0xfc0 fs/fs-writeback.c:2077
wb_check_background_flush fs/fs-writeback.c:2147 [inline]
wb_do_writeback fs/fs-writeback.c:2235 [inline]
wb_workfn+0xc00/0xf9c fs/fs-writeback.c:2262
process_one_work+0x694/0x1204 kernel/workqueue.c:2630
process_scheduled_works kernel/workqueue.c:2703 [inline]
worker_thread+0x938/0xef4 kernel/workqueue.c:2784
kthread+0x288/0x310 kernel/kthread.c:388
ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:857
INFO: task syz-executor.4:11651 blocked for more than 143 seconds.
Not tainted 6.6.0-rc7-syzkaller-g8de1e7afcc1c #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:0 pid:11651 ppid:6144 flags:0x00000005
Call trace:
__switch_to+0x314/0x560 arch/arm64/kernel/process.c:556
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x1364/0x23b4 kernel/sched/core.c:6695
schedule+0xc4/0x170 kernel/sched/core.c:6771
schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6830
rwsem_down_write_slowpath+0xcfc/0x1aa0 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:1574
inode_lock include/linux/fs.h:802 [inline]
btrfs_inode_lock+0x54/0xe0 fs/btrfs/inode.c:377
btrfs_buffered_write+0x1e8/0xffc fs/btrfs/file.c:1200
btrfs_do_write_iter+0x204/0xd40 fs/btrfs/file.c:1683
btrfs_file_write_iter+0x2c/0x3c fs/btrfs/file.c:1700
call_write_iter include/linux/fs.h:1956 [inline]
new_sync_write fs/read_write.c:491 [inline]
vfs_write+0x628/0x93c fs/read_write.c:584
ksys_write+0x15c/0x26c fs/read_write.c:637
__do_sys_write fs/read_write.c:649 [inline]
__se_sys_write fs/read_write.c:646 [inline]
__arm64_sys_write+0x7c/0x90 fs/read_write.c:646
__invoke_syscall arch/arm64/kernel/syscall.c:37 [inline]
invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51
el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136
do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155
el0_svc+0x54/0x158 arch/arm64/kernel/entry-common.c:678
el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696
el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595
INFO: task syz-executor.4:11652 blocked for more than 143 seconds.
Not tainted 6.6.0-rc7-syzkaller-g8de1e7afcc1c #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:0 pid:11652 ppid:6144 flags:0x0000000d
Call trace:
__switch_to+0x314/0x560 arch/arm64/kernel/process.c:556
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x1364/0x23b4 kernel/sched/core.c:6695
schedule+0xc4/0x170 kernel/sched/core.c:6771
wait_on_state fs/btrfs/extent-io-tree.c:719 [inline]
wait_extent_bit+0x4cc/0x620 fs/btrfs/extent-io-tree.c:763
lock_extent+0x18c/0x230 fs/btrfs/extent-io-tree.c:1755
btrfs_page_mkwrite+0x62c/0xcbc fs/btrfs/inode.c:8143
do_page_mkwrite+0x140/0x2dc mm/memory.c:2931
wp_page_shared mm/memory.c:3291 [inline]
do_wp_page+0xb6c/0x2f4c mm/memory.c:3376
handle_pte_fault mm/memory.c:4994 [inline]
__handle_mm_fault mm/memory.c:5119 [inline]
handle_mm_fault+0x11b0/0x49fc mm/memory.c:5284
__do_page_fault arch/arm64/mm/fault.c:513 [inline]
do_page_fault+0x4e8/0xa54 arch/arm64/mm/fault.c:626
do_mem_abort+0x74/0x200 arch/arm64/mm/fault.c:846
el1_abort+0x3c/0x5c arch/arm64/kernel/entry-common.c:398
el1h_64_sync_handler+0x60/0xac arch/arm64/kernel/entry-common.c:458
el1h_64_sync+0x64/0x68 arch/arm64/kernel/entry.S:590
__arch_copy_to_user+0x88/0x234 arch/arm64/lib/copy_template.S:90
emit_last_fiemap_cache fs/btrfs/extent_io.c:2506 [inline]
extent_fiemap+0x16bc/0x1a44 fs/btrfs/extent_io.c:3033
btrfs_fiemap+0x154/0x1c0 fs/btrfs/inode.c:7815
ioctl_fiemap fs/ioctl.c:220 [inline]
do_vfs_ioctl+0x1958/0x2704 fs/ioctl.c:811
__do_sys_ioctl fs/ioctl.c:869 [inline]
__se_sys_ioctl fs/ioctl.c:857 [inline]
__arm64_sys_ioctl+0xe4/0x1c8 fs/ioctl.c:857
__invoke_syscall arch/arm64/kernel/syscall.c:37 [inline]
invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51
el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136
do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155
el0_svc+0x54/0x158 arch/arm64/kernel/entry-common.c:678
el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696
el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffff80008e513840 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:302
3 locks held by kworker/u4:6/287:
#0: ffff0000c1c0e138 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x560/0x1204 kernel/workqueue.c:2603
#1: ffff800097057c20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x5a0/0x1204 kernel/workqueue.c:2605
#2: ffff0000cb8860e0 (&type->s_umount_key#55){++++}-{3:3}, at: super_trylock_shared+0x28/0xe4 fs/super.c:607
2 locks held by getty/5849:
#0: ffff0000d2a040a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340
#1: ffff800094c002f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x414/0x1214 drivers/tty/n_tty.c:2206
3 locks held by kworker/0:4/6196:
#0: ffff0000c0020d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x560/0x1204 kernel/workqueue.c:2603
#1: ffff800097477c20 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work+0x5a0/0x1204 kernel/workqueue.c:2605
#2: ffff00012cdd7240 (&data->fib_lock){+.+.}-{3:3}, at: nsim_fib_event_work+0x270/0x32bc drivers/net/netdevsim/fib.c:1489
3 locks held by syz-executor.4/11651:
#0: ffff0000c6ee85c8 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x11c/0x148 fs/file.c:1064
#1: ffff0000cb886410 (sb_writers#15){.+.+}-{0:0}, at: vfs_write+0x240/0x93c fs/read_write.c:580
#2: ffff00012b578590 (&sb->s_type->i_mutex_key#21){++++}-{3:3}, at: inode_lock include/linux/fs.h:802 [inline]
#2: ffff00012b578590 (&sb->s_type->i_mutex_key#21){++++}-{3:3}, at: btrfs_inode_lock+0x54/0xe0 fs/btrfs/inode.c:377
4 locks held by syz-executor.4/11652:
#0: ffff00012b578590 (&sb->s_type->i_mutex_key#21){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:812 [inline]
#0: ffff00012b578590 (&sb->s_type->i_mutex_key#21){++++}-{3:3}, at: btrfs_inode_lock+0x68/0xe0 fs/btrfs/inode.c:369
#1: ffff0000d89ee990 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:165 [inline]
#1: ffff0000d89ee990 (&mm->mmap_lock){++++}-{3:3}, at: get_mmap_lock_carefully mm/memory.c:5311 [inline]
#1: ffff0000d89ee990 (&mm->mmap_lock){++++}-{3:3}, at: lock_mm_and_find_vma+0x38/0x2d8 mm/memory.c:5371
#2: ffff0000cb886508 (sb_pagefaults){.+.+}-{0:0}, at: do_page_mkwrite+0x140/0x2dc mm/memory.c:2931
#3: ffff00012b578418 (&ei->i_mmap_lock){++++}-{3:3}, at: btrfs_page_mkwrite+0x4d4/0xcbc fs/btrfs/inode.c:8132
2 locks held by syz-executor.1/12693:
#0: ffff0000cb8860e0 (&type->s_umount_key#55){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff0000cb8860e0 (&type->s_umount_key#55){++++}-{3:3}, at: super_lock+0x160/0x328 fs/super.c:117
#1: ffff0000cb8847d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:364 [inline]
#1: ffff0000cb8847d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x208/0x944 fs/fs-writeback.c:2739
2 locks held by syz-executor.1/12702:
#0: ffff0000cb8860e0 (&type->s_umount_key#55){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff0000cb8860e0 (&type->s_umount_key#55){++++}-{3:3}, at: super_lock+0x160/0x328 fs/super.c:117
#1: ffff0000cb8847d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:364 [inline]
#1: ffff0000cb8847d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x208/0x944 fs/fs-writeback.c:2739
2 locks held by syz-executor.1/12719:
#0: ffff0000cb8860e0 (&type->s_umount_key#55){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff0000cb8860e0 (&type->s_umount_key#55){++++}-{3:3}, at: super_lock+0x160/0x328 fs/super.c:117
#1: ffff0000cb8847d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:364 [inline]
#1: ffff0000cb8847d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x208/0x944 fs/fs-writeback.c:2739
2 locks held by syz-executor.1/12799:
#0: ffff0000cb8860e0 (&type->s_umount_key#55){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff0000cb8860e0 (&type->s_umount_key#55){++++}-{3:3}, at: super_lock+0x160/0x328 fs/super.c:117
#1: ffff0000cb8847d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:364 [inline]
#1: ffff0000cb8847d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x208/0x944 fs/fs-writeback.c:2739
2 locks held by syz-executor.1/12801:
#0: ffff0000cb8860e0 (&type->s_umount_key#55){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff0000cb8860e0 (&type->s_umount_key#55){++++}-{3:3}, at: super_lock+0x160/0x328 fs/super.c:117
#1: ffff0000cb8847d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:364 [inline]
#1: ffff0000cb8847d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x208/0x944 fs/fs-writeback.c:2739
2 locks held by syz-executor.1/12802:
#0: ffff0000cb8860e0 (&type->s_umount_key#55){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff0000cb8860e0 (&type->s_umount_key#55){++++}-{3:3}, at: super_lock+0x160/0x328 fs/super.c:117
#1: ffff0000cb8847d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:364 [inline]
#1: ffff0000cb8847d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x208/0x944 fs/fs-writeback.c:2739
=============================================