INFO: task segctord:8121 blocked for more than 143 seconds.
Not tainted 6.3.0-syzkaller-07919-g6e98b09da931 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:segctord state:D stack:28696 pid:8121 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5307 [inline]
__schedule+0x173b/0x4630 kernel/sched/core.c:6625
schedule+0xc3/0x180 kernel/sched/core.c:6701
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6760
rwsem_down_write_slowpath+0xedd/0x13a0 kernel/locking/rwsem.c:1178
__down_write_common+0x1aa/0x200 kernel/locking/rwsem.c:1306
nilfs_transaction_lock+0x25c/0x4f0 fs/nilfs2/segment.c:357
nilfs_segctor_thread_construct fs/nilfs2/segment.c:2508 [inline]
nilfs_segctor_thread+0x52f/0x1140 fs/nilfs2/segment.c:2592
kthread+0x2b2/0x350 kernel/kthread.c:379
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
INFO: task segctord:8202 blocked for more than 144 seconds.
Not tainted 6.3.0-syzkaller-07919-g6e98b09da931 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:segctord state:D stack:28696 pid:8202 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5307 [inline]
__schedule+0x173b/0x4630 kernel/sched/core.c:6625
schedule+0xc3/0x180 kernel/sched/core.c:6701
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6760
rwsem_down_write_slowpath+0xedd/0x13a0 kernel/locking/rwsem.c:1178
__down_write_common+0x1aa/0x200 kernel/locking/rwsem.c:1306
nilfs_transaction_lock+0x25c/0x4f0 fs/nilfs2/segment.c:357
nilfs_segctor_thread_construct fs/nilfs2/segment.c:2508 [inline]
nilfs_segctor_thread+0x52f/0x1140 fs/nilfs2/segment.c:2592
kthread+0x2b2/0x350 kernel/kthread.c:379
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/13:
#0: ffffffff8cf26030 (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: ffffffff8cf263f0 (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: ffffffff8cf25e60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by kworker/u4:4/75:
2 locks held by getty/4733:
#0: ffff88802cf4a098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:244
#1: ffffc900015a02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6ab/0x1db0 drivers/tty/n_tty.c:2177
1 lock held by syz-fuzzer/5157:
1 lock held by syz-executor.2/5004:
#0: ffff88808bad80e0 (&type->s_umount_key#56){++++}-{3:3}, at: deactivate_super+0xad/0xf0 fs/super.c:361
3 locks held by kworker/0:10/5381:
#0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x77e/0x10e0 kernel/workqueue.c:2363
#1: ffffc90005cf7d20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x7c8/0x10e0 kernel/workqueue.c:2365
#2: ffffffff8cf2b538 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:293 [inline]
#2: ffffffff8cf2b538 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x3a3/0x890 kernel/rcu/tree_exp.h:992
4 locks held by syz-executor.4/8110:
1 lock held by segctord/8121:
#0: ffff88807f7b02a0 (&nilfs->ns_segctor_sem){++++}-{3:3}, at: nilfs_transaction_lock+0x25c/0x4f0 fs/nilfs2/segment.c:357
4 locks held by syz-executor.3/8197:
1 lock held by segctord/8202:
#0: ffff88801c0572a0 (&nilfs->ns_segctor_sem){++++}-{3:3}, at: nilfs_transaction_lock+0x25c/0x4f0 fs/nilfs2/segment.c:357
2 locks held by kworker/0:22/8585:
#0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x77e/0x10e0 kernel/workqueue.c:2363
#1: ffffc9000bcffd20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x7c8/0x10e0 kernel/workqueue.c:2365
2 locks held by syz-executor.0/13306:
#0: ffff88808605e0e0 (&type->s_umount_key#56){++++}-{3:3}, at: deactivate_super+0xad/0xf0 fs/super.c:361
#1: ffffffff8cf2b538 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:325 [inline]
#1: ffffffff8cf2b538 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x46c/0x890 kernel/rcu/tree_exp.h:992
2 locks held by syz-executor.3/20158:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.3.0-syzkaller-07919-g6e98b09da931 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023
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+0x2b2/0x350 kernel/kthread.c:379
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 8110 Comm: syz-executor.4 Not tainted 6.3.0-syzkaller-07919-g6e98b09da931 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023
RIP: 0010:task_irq_context kernel/locking/lockdep.c:4580 [inline]
RIP: 0010:__lock_acquire+0x3c3/0x2000 kernel/locking/lockdep.c:5011
Code: 8b 6c 24 10 4c 8b 44 24 08 48 be 00 00 00 00 00 fc ff df 48 8b 84 24 c0 00 00 00 48 89 5c 24 78 48 89 03 65 8b 05 51 f7 97 7e <31> db 85 c0 0f 95 c3 01 db 48 8b 44 24 50 48 8d b8 ac 0a 00 00 49
RSP: 0018:ffffc90003acf2d8 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffff888032b82940 RCX: ffffffff91af5003
RDX: 0000000000000004 RSI: dffffc0000000000 RDI: 0000000000000021
RBP: 0000000000000014 R08: ffff888032b82888 R09: 0000000000000000
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000
R13: ffffffff81bc2b55 R14: ffffffff8cf25e60 R15: 0000000000000021
FS: 00007f1e4c252700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffb70a50000 CR3: 000000002fc74000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_acquire+0x1e3/0x520 kernel/locking/lockdep.c:5691
rcu_lock_acquire+0x2e/0x40 include/linux/rcupdate.h:327
rcu_read_lock include/linux/rcupdate.h:773 [inline]
mapping_get_entry mm/filemap.c:1855 [inline]
__filemap_get_folio+0x152/0xe50 mm/filemap.c:1920
pagecache_get_page+0x2c/0x240 mm/folio-compat.c:99
find_or_create_page include/linux/pagemap.h:634 [inline]
grab_cache_page include/linux/pagemap.h:756 [inline]
nilfs_grab_buffer+0xb1/0x540 fs/nilfs2/page.c:57
nilfs_mdt_submit_block+0xdc/0x790 fs/nilfs2/mdt.c:121
nilfs_mdt_read_block+0xeb/0x430 fs/nilfs2/mdt.c:176
nilfs_mdt_get_block+0x11d/0xa50 fs/nilfs2/mdt.c:251
nilfs_palloc_get_block+0x142/0x240 fs/nilfs2/alloc.c:216
nilfs_palloc_get_entry_block+0x8e/0xa0 fs/nilfs2/alloc.c:318
nilfs_ifile_create_inode+0xf5/0x2d0 fs/nilfs2/ifile.c:66
nilfs_new_inode+0x257/0xa30 fs/nilfs2/inode.c:347
nilfs_symlink+0x169/0x380 fs/nilfs2/namei.c:144
vfs_symlink+0x12f/0x2a0 fs/namei.c:4398
do_symlinkat+0x201/0x610 fs/namei.c:4424
__do_sys_symlink fs/namei.c:4445 [inline]
__se_sys_symlink fs/namei.c:4443 [inline]
__x64_sys_symlink+0x7e/0x90 fs/namei.c:4443
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f1e4b48c169
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f1e4c252168 EFLAGS: 00000246 ORIG_RAX: 0000000000000058
RAX: ffffffffffffffda RBX: 00007f1e4b5abf80 RCX: 00007f1e4b48c169
RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000020000000
RBP: 00007f1e4b4e7ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd0c1ce84f R14: 00007f1e4c252300 R15: 0000000000022000