INFO: task syz-executor.0:3687 blocked for more than 143 seconds.
Not tainted 6.0.0-rc7-syzkaller-00132-g987a926c1d8a #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:21296 pid: 3687 ppid: 1 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5182 [inline]
__schedule+0x957/0xe20 kernel/sched/core.c:6494
schedule+0xcb/0x190 kernel/sched/core.c:6570
wb_wait_for_completion+0x165/0x290 fs/fs-writeback.c:191
sync_inodes_sb+0x298/0xaa0 fs/fs-writeback.c:2693
sync_filesystem+0x16b/0x220 fs/sync.c:64
generic_shutdown_super+0x6b/0x300 fs/super.c:474
kill_block_super+0x79/0xd0 fs/super.c:1427
deactivate_locked_super+0xa7/0xf0 fs/super.c:332
cleanup_mnt+0x4ce/0x560 fs/namespace.c:1186
task_work_run+0x146/0x1c0 kernel/task_work.c:177
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop+0x134/0x160 kernel/entry/common.c:169
exit_to_user_mode_prepare+0xad/0x110 kernel/entry/common.c:201
__syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline]
syscall_exit_to_user_mode+0x2e/0x60 kernel/entry/common.c:294
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x466ca7
RSP: 002b:00007ffef164ec28 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000466ca7
RDX: 00007ffef164ecf9 RSI: 0000000000000002 RDI: 00007ffef164ecf0
RBP: 00007ffef164ecf0 R08: 00000000ffffffff R09: 00007ffef164eac0
R10: 0000000002014893 R11: 0000000000000246 R12: 00000000004ae4c5
R13: 00007ffef164fda0 R14: 0000000002014810 R15: 0000000000000002
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/13:
#0: ffffffff8cd20a70 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x30/0xd00 kernel/rcu/tasks.h:507
1 lock held by rcu_tasks_trace/14:
#0: ffffffff8cd21270 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x30/0xd00 kernel/rcu/tasks.h:507
1 lock held by khungtaskd/29:
#0: ffffffff8cd208a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by kworker/u4:3/47:
#0: ffff8881459cc938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x796/0xd10 kernel/workqueue.c:2262
#1: ffffc90000b87d00 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x7d0/0xd10 kernel/workqueue.c:2264
2 locks held by getty/3288:
#0: ffff8880269ed098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244
#1: ffffc90002d232f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6e8/0x1e50 drivers/tty/n_tty.c:2177
2 locks held by syz-executor.0/3687:
#0: ffff88807e2980e0 (&type->s_umount_key#48){+.+.}-{3:3}, at: deactivate_super+0x96/0xd0 fs/super.c:362
#1: ffff88801e4067d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:362 [inline]
#1: ffff88801e4067d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x279/0xaa0 fs/fs-writeback.c:2691
3 locks held by segctord/3708:
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.0.0-rc7-syzkaller-00132-g987a926c1d8a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
nmi_cpu_backtrace+0x47c/0x4b0 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x169/0x280 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline]
watchdog+0xcd5/0xd20 kernel/hung_task.c:369
kthread+0x266/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 3708 Comm: segctord Not tainted 6.0.0-rc7-syzkaller-00132-g987a926c1d8a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022
RIP: 0010:folio_batch_count include/linux/pagevec.h:108 [inline]
RIP: 0010:lru_add_drain_cpu+0x396/0x600 mm/swap.c:644
Code: ff 4c 89 f7 48 c7 c6 40 4f ba 81 e8 84 02 00 00 eb 05 e8 7d 4f cf ff 4d 8d b4 24 30 01 00 00 4c 89 f0 48 c1 e8 03 42 8a 04 38 <84> c0 0f 85 8e 01 00 00 41 0f b6 1e 31 ff 89 de e8 35 52 cf ff 85
RSP: 0018:ffffc9000425f220 EFLAGS: 00000a02
RAX: 1ffff11017346900 RBX: 0000000000000000 RCX: ffff888025f25880
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc9000425f320 R08: ffffffff81ba46c4 R09: fffffbfff1ff4611
R10: fffffbfff1ff4611 R11: 1ffffffff1ff4610 R12: ffff8880b9a34b30
R13: 1ffff9200084be4c R14: ffff8880b9a34c60 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000559214ad2f28 CR3: 000000000ca8e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lru_add_drain+0x79/0x140 mm/swap.c:730
__pagevec_release+0x50/0xf0 mm/swap.c:1029
pagevec_release include/linux/pagevec.h:71 [inline]
nilfs_lookup_dirty_data_buffers+0x6b0/0x8c0 fs/nilfs2/segment.c:727
nilfs_segctor_scan_file+0x244/0xb00 fs/nilfs2/segment.c:1048
nilfs_segctor_collect_blocks fs/nilfs2/segment.c:1202 [inline]
nilfs_segctor_collect fs/nilfs2/segment.c:1497 [inline]
nilfs_segctor_do_construct+0x2124/0x70d0 fs/nilfs2/segment.c:2039
nilfs_segctor_construct+0x143/0x8d0 fs/nilfs2/segment.c:2375
nilfs_segctor_thread_construct fs/nilfs2/segment.c:2483 [inline]
nilfs_segctor_thread+0x539/0x1100 fs/nilfs2/segment.c:2566
kthread+0x266/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306