INFO: task syz-executor.1:5026 blocked for more than 143 seconds.
Not tainted 6.4.0-rc4-syzkaller-00099-g1874a42a7d74 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:20600 pid:5026 ppid:1 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5343 [inline]
__schedule+0x187b/0x4900 kernel/sched/core.c:6669
schedule+0xc3/0x180 kernel/sched/core.c:6745
wb_wait_for_completion+0x166/0x290 fs/fs-writeback.c:192
sync_inodes_sb+0x297/0xab0 fs/fs-writeback.c:2730
sync_filesystem+0x16f/0x220 fs/sync.c:64
generic_shutdown_super+0x6f/0x340 fs/super.c:473
kill_block_super+0x84/0xf0 fs/super.c:1407
deactivate_locked_super+0xa4/0x110 fs/super.c:331
cleanup_mnt+0x426/0x4c0 fs/namespace.c:1177
task_work_run+0x24a/0x300 kernel/task_work.c:179
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop+0xd9/0x100 kernel/entry/common.c:171
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204
__syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline]
syscall_exit_to_user_mode+0x64/0x280 kernel/entry/common.c:297
do_syscall_64+0x4d/0xc0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fe7a588d5d7
RSP: 002b:00007ffdc9a93cd8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fe7a588d5d7
RDX: 00007ffdc9a93daa RSI: 000000000000000a RDI: 00007ffdc9a93da0
RBP: 00007ffdc9a93da0 R08: 00000000ffffffff R09: 00007ffdc9a93b70
R10: 0000555555e6b893 R11: 0000000000000246 R12: 00007fe7a58e6cdc
R13: 00007ffdc9a94e60 R14: 0000555555e6b810 R15: 00007ffdc9a94ea0
INFO: task syz-executor.4:5042 blocked for more than 143 seconds.
Not tainted 6.4.0-rc4-syzkaller-00099-g1874a42a7d74 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:19824 pid:5042 ppid:1 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5343 [inline]
__schedule+0x187b/0x4900 kernel/sched/core.c:6669
schedule+0xc3/0x180 kernel/sched/core.c:6745
wb_wait_for_completion+0x166/0x290 fs/fs-writeback.c:192
sync_inodes_sb+0x297/0xab0 fs/fs-writeback.c:2730
sync_filesystem+0x16f/0x220 fs/sync.c:64
generic_shutdown_super+0x6f/0x340 fs/super.c:473
kill_block_super+0x84/0xf0 fs/super.c:1407
deactivate_locked_super+0xa4/0x110 fs/super.c:331
cleanup_mnt+0x426/0x4c0 fs/namespace.c:1177
task_work_run+0x24a/0x300 kernel/task_work.c:179
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop+0xd9/0x100 kernel/entry/common.c:171
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204
__syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline]
syscall_exit_to_user_mode+0x64/0x280 kernel/entry/common.c:297
do_syscall_64+0x4d/0xc0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f77f1a8d5d7
RSP: 002b:00007ffd6a768fb8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f77f1a8d5d7
RDX: 00007ffd6a76908a RSI: 000000000000000a RDI: 00007ffd6a769080
RBP: 00007ffd6a769080 R08: 00000000ffffffff R09: 00007ffd6a768e50
R10: 000055555573a893 R11: 0000000000000246 R12: 00007f77f1ae6cdc
R13: 00007ffd6a76a140 R14: 000055555573a810 R15: 00007ffd6a76a180
Showing all locks held in the system:
2 locks held by kworker/u4:0/10:
#0: ffff888142e78938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x77e/0x10e0 kernel/workqueue.c:2378
#1: ffffc900000f7d20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x7c8/0x10e0 kernel/workqueue.c:2380
1 lock held by rcu_tasks_kthre/13:
#0: ffffffff8cf276f0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:518
1 lock held by rcu_tasks_trace/14:
#0: ffffffff8cf27ab0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:518
1 lock held by khungtaskd/28:
#0: ffffffff8cf27520 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by getty/4746:
#0: ffff88814aa84098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900015902f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6ab/0x1db0 drivers/tty/n_tty.c:2176
2 locks held by syz-executor.1/5026:
#0: ffff8880379e80e0 (&type->s_umount_key#56){+.+.}-{3:3}, at: deactivate_super+0xad/0xf0 fs/super.c:361
#1: ffff8881417e07d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:364 [inline]
#1: ffff8881417e07d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x278/0xab0 fs/fs-writeback.c:2728
2 locks held by syz-executor.4/5042:
#0: ffff88802ba1a0e0 (&type->s_umount_key#56){+.+.}-{3:3}, at: deactivate_super+0xad/0xf0 fs/super.c:361
#1: ffff88801f2aa7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:364 [inline]
#1: ffff88801f2aa7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x278/0xab0 fs/fs-writeback.c:2728
2 locks held by kworker/u4:9/6740:
#0: ffff888142e78938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x77e/0x10e0 kernel/workqueue.c:2378
#1: ffffc9000397fd20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x7c8/0x10e0 kernel/workqueue.c:2380
1 lock held by segctord/6804:
1 lock held by segctord/6840:
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.4.0-rc4-syzkaller-00099-g1874a42a7d74 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x498/0x4d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x187/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
watchdog+0xec2/0xf00 kernel/hung_task.c:379
kthread+0x2b8/0x350 kernel/kthread.c:379
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 6840 Comm: segctord Not tainted 6.4.0-rc4-syzkaller-00099-g1874a42a7d74 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023
RIP: 0010:lock_is_held_type+0x11f/0x190 kernel/locking/lockdep.c:5778
Code: 48 c7 c7 a0 9f ea 8a e8 af 16 00 00 b8 ff ff ff ff 65 0f c1 05 6a 46 53 75 83 f8 01 75 40 48 c7 04 24 00 00 00 00 9c 8f 04 24 04 24 00 02 00 00 75 46 41 f7 c4 00 02 00 00 74 01 fb 65 48 8b
RSP: 0018:ffffc90004996d40 EFLAGS: 00000046
RAX: 0000000000000001 RBX: 0000000000000003 RCX: ffff88801f98bb80
RDX: ffff88801f98bb80 RSI: ffffffff8aea9fa0 RDI: ffffffff8b384540
RBP: 0000000000000000 R08: ffffffff8aab36a5 R09: fffffbfff206504d
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000246
R13: ffff88801f98bb80 R14: 00000000ffffffff R15: ffff88807576f6f0
FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c000f10000 CR3: 000000002a3b4000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_is_held include/linux/lockdep.h:288 [inline]
xa_entry include/linux/xarray.h:1198 [inline]
xas_descend+0xea/0x440 lib/xarray.c:204
xas_load+0xbe/0x140 lib/xarray.c:242
filemap_get_entry+0x1bd/0x460 mm/filemap.c:1858
__filemap_get_folio+0x53/0xa00 mm/filemap.c:1918
pagecache_get_page+0x2e/0x220 mm/folio-compat.c:99
find_or_create_page include/linux/pagemap.h:635 [inline]
grab_cache_page include/linux/pagemap.h:757 [inline]
nilfs_grab_buffer+0xb1/0x540 fs/nilfs2/page.c:57
nilfs_btnode_submit_block+0xdf/0x720 fs/nilfs2/btnode.c:81
__nilfs_btree_get_block+0x18d/0x7e0 fs/nilfs2/btree.c:480
nilfs_btree_do_lookup+0x57b/0xce0 fs/nilfs2/btree.c:578
nilfs_btree_propagate+0x2d0/0xde0 fs/nilfs2/btree.c:2086
nilfs_bmap_propagate+0x71/0x120 fs/nilfs2/bmap.c:345
nilfs_collect_dat_data+0x4d/0xc0 fs/nilfs2/segment.c:644
nilfs_segctor_apply_buffers+0x180/0x330 fs/nilfs2/segment.c:1039
nilfs_segctor_scan_file+0x76a/0xa10 fs/nilfs2/segment.c:1088
nilfs_segctor_collect_blocks fs/nilfs2/segment.c:1254 [inline]
nilfs_segctor_collect fs/nilfs2/segment.c:1524 [inline]
nilfs_segctor_do_construct+0x21bd/0x6d30 fs/nilfs2/segment.c:2070
nilfs_segctor_construct+0x145/0x8c0 fs/nilfs2/segment.c:2404
nilfs_segctor_thread_construct fs/nilfs2/segment.c:2512 [inline]
nilfs_segctor_thread+0x53a/0x1140 fs/nilfs2/segment.c:2595
kthread+0x2b8/0x350 kernel/kthread.c:379
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308