INFO: task syz-executor.0:3680 blocked for more than 143 seconds.
Not tainted 6.0.0-rc6-syzkaller-00344-g5e049663f678 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:21240 pid: 3680 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: 0033:0x466c67
RSP: 002b:00007ffe76536cc8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000466c67
RDX: 00007ffe76536d99 RSI: 0000000000000002 RDI: 00007ffe76536d90
RBP: 00007ffe76536d90 R08: 00000000ffffffff R09: 00007ffe76536b60
R10: 00000000023c0893 R11: 0000000000000246 R12: 00000000004ae4c5
R13: 00007ffe76537e40 R14: 00000000023c0810 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/u4:2/42:
#0: ffff8881457fb938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x796/0xd10 kernel/workqueue.c:2262
#1: ffffc90000b37d00 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x7d0/0xd10 kernel/workqueue.c:2264
2 locks held by getty/3281:
#0: ffff88801880e098 (&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.0/3680:
#0: ffff88807bb000e0 (&type->s_umount_key#48){+.+.}-{3:3}, at: deactivate_super+0x96/0xd0 fs/super.c:362
#1: ffff8881473987d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:362 [inline]
#1: ffff8881473987d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x279/0xaa0 fs/fs-writeback.c:2691
2 locks held by segctord/3699:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.0.0-rc6-syzkaller-00344-g5e049663f678 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 3699 Comm: segctord Not tainted 6.0.0-rc6-syzkaller-00344-g5e049663f678 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
RIP: 0010:stack_trace_consume_entry+0x97/0x270 kernel/stacktrace.c:93
Code: 37 45 85 f6 74 21 41 ff ce 41 8a 44 15 00 84 c0 0f 85 63 01 00 00 44 89 37 b0 01 e9 93 00 00 00 31 c0 e9 8c 00 00 00 48 89 d8 <48> c1 e8 03 80 3c 10 00 74 26 4c 89 0c 24 48 89 df 49 89 f5 4d 89
RSP: 0018:ffffc900043ceb70 EFLAGS: 00000246
RAX: ffffc900043ceca0 RBX: ffffc900043ceca0 RCX: ffffffff8f719000
RDX: dffffc0000000000 RSI: ffffffff83512f03 RDI: ffffc900043cecac
RBP: ffffc900043ceca8 R08: 000000000000000e R09: ffffc900043cecb0
R10: fffff52000879d84 R11: 1ffff92000879d82 R12: 1ffff92000879d95
R13: 1ffff92000879d95 R14: 0000000000000000 R15: 1ffff92000879d96
FS: 0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055f7ab8d3680 CR3: 000000001d39b000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
arch_stack_walk+0x106/0x140 arch/x86/kernel/stacktrace.c:27
stack_trace_save+0x12d/0x1f0 kernel/stacktrace.c:122
save_stack+0xf5/0x1e0 mm/page_owner.c:127
__reset_page_owner+0x52/0x190 mm/page_owner.c:148
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1449 [inline]
free_pcp_prepare+0x812/0x900 mm/page_alloc.c:1499
free_unref_page_prepare mm/page_alloc.c:3380 [inline]
free_unref_page+0x7d/0x630 mm/page_alloc.c:3476
free_slab mm/slub.c:2073 [inline]
discard_slab mm/slub.c:2079 [inline]
__unfreeze_partials+0x1ab/0x200 mm/slub.c:2553
put_cpu_partial+0x116/0x180 mm/slub.c:2629
qlist_free_all+0x2b/0x70 mm/kasan/quarantine.c:187
kasan_quarantine_reduce+0x169/0x180 mm/kasan/quarantine.c:294
__kasan_slab_alloc+0x2f/0xe0 mm/kasan/common.c:447
kasan_slab_alloc include/linux/kasan.h:224 [inline]
slab_post_alloc_hook mm/slab.h:727 [inline]
slab_alloc_node mm/slub.c:3248 [inline]
slab_alloc mm/slub.c:3256 [inline]
__kmem_cache_alloc_lru mm/slub.c:3263 [inline]
kmem_cache_alloc+0x1a6/0x310 mm/slub.c:3273
nilfs_btree_alloc_path fs/nilfs2/btree.c:28 [inline]
nilfs_btree_propagate+0x95/0xe10 fs/nilfs2/btree.c:2066
nilfs_bmap_propagate+0x6d/0x120 fs/nilfs2/bmap.c:337
nilfs_collect_dat_data+0x49/0xc0 fs/nilfs2/segment.c:625
nilfs_segctor_apply_buffers+0x192/0x380 fs/nilfs2/segment.c:1012
nilfs_segctor_scan_file+0x861/0xb00 fs/nilfs2/segment.c:1061
nilfs_segctor_collect_blocks fs/nilfs2/segment.c:1227 [inline]
nilfs_segctor_collect fs/nilfs2/segment.c:1497 [inline]
nilfs_segctor_do_construct+0x22ee/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