INFO: task syz.1.528:11465 blocked for more than 143 seconds.
      Not tainted 6.11.0-rc1-syzkaller-00044-g22f546873149 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.528       state:D stack:27256 pid:11465 tgid:11442 ppid:11039  flags:0x00000004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5188 [inline]
 __schedule+0x17ae/0x4a10 kernel/sched/core.c:6529
 __schedule_loop kernel/sched/core.c:6606 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6621
 percpu_rwsem_wait+0x3c2/0x450 kernel/locking/percpu-rwsem.c:162
 __percpu_down_read+0xee/0x130 kernel/locking/percpu-rwsem.c:177
 percpu_down_read include/linux/percpu-rwsem.h:65 [inline]
 __sb_start_write include/linux/fs.h:1675 [inline]
 sb_start_write include/linux/fs.h:1811 [inline]
 file_start_write+0x1fd/0x250 include/linux/fs.h:2876
 direct_splice_actor+0x49/0x220 fs/splice.c:1163
 splice_direct_to_actor+0x58e/0xc90 fs/splice.c:1108
 do_splice_direct_actor fs/splice.c:1207 [inline]
 do_splice_direct+0x28c/0x3e0 fs/splice.c:1233
 do_sendfile+0x56d/0xe20 fs/read_write.c:1295
 __do_sys_sendfile64 fs/read_write.c:1362 [inline]
 __se_sys_sendfile64+0x17c/0x1e0 fs/read_write.c:1348
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7a3c5773b9
RSP: 002b:00007f7a3d380048 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f7a3c706058 RCX: 00007f7a3c5773b9
RDX: 0000000000000000 RSI: 0000000000000006 RDI: 0000000000000007
RBP: 00007f7a3c5e48e6 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000100800001 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f7a3c706058 R15: 00007ffe55a96518
 </TASK>
INFO: task syz.1.528:11466 blocked for more than 144 seconds.
      Not tainted 6.11.0-rc1-syzkaller-00044-g22f546873149 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.528       state:D stack:27424 pid:11466 tgid:11442 ppid:11039  flags:0x00000004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5188 [inline]
 __schedule+0x17ae/0x4a10 kernel/sched/core.c:6529
 __schedule_loop kernel/sched/core.c:6606 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6621
 percpu_rwsem_wait+0x3c2/0x450 kernel/locking/percpu-rwsem.c:162
 __percpu_down_read+0xee/0x130 kernel/locking/percpu-rwsem.c:177
 percpu_down_read include/linux/percpu-rwsem.h:65 [inline]
 __sb_start_write include/linux/fs.h:1675 [inline]
 sb_start_write+0x184/0x1c0 include/linux/fs.h:1811
 mnt_want_write+0x3f/0x90 fs/namespace.c:515
 open_last_lookups fs/namei.c:3636 [inline]
 path_openat+0x779/0x3470 fs/namei.c:3883
 do_filp_open+0x235/0x490 fs/namei.c:3913
 do_sys_openat2+0x13e/0x1d0 fs/open.c:1416
 do_sys_open fs/open.c:1431 [inline]
 __do_sys_openat fs/open.c:1447 [inline]
 __se_sys_openat fs/open.c:1442 [inline]
 __x64_sys_openat+0x247/0x2a0 fs/open.c:1442
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7a3c5773b9
RSP: 002b:00007f7a3d35f048 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f7a3c706130 RCX: 00007f7a3c5773b9
RDX: 000000000000275a RSI: 0000000020000000 RDI: ffffffffffffff9c
RBP: 00007f7a3c5e48e6 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f7a3c706130 R15: 00007ffe55a96518
 </TASK>
INFO: task syz.1.528:11467 blocked for more than 144 seconds.
      Not tainted 6.11.0-rc1-syzkaller-00044-g22f546873149 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.528       state:D stack:27424 pid:11467 tgid:11442 ppid:11039  flags:0x00000004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5188 [inline]
 __schedule+0x17ae/0x4a10 kernel/sched/core.c:6529
 __schedule_loop kernel/sched/core.c:6606 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6621
 percpu_rwsem_wait+0x3c2/0x450 kernel/locking/percpu-rwsem.c:162
 __percpu_down_read+0xee/0x130 kernel/locking/percpu-rwsem.c:177
 percpu_down_read include/linux/percpu-rwsem.h:65 [inline]
 __sb_start_write include/linux/fs.h:1675 [inline]
 sb_start_write+0x184/0x1c0 include/linux/fs.h:1811
 file_start_write include/linux/fs.h:2876 [inline]
 vfs_write+0x227/0xc90 fs/read_write.c:586
 ksys_write+0x1a0/0x2c0 fs/read_write.c:643
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7a3c5773b9
RSP: 002b:00007f7a3d33e048 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f7a3c706208 RCX: 00007f7a3c5773b9
RDX: 000000000000000b RSI: 0000000020000ec0 RDI: 0000000000000004
RBP: 00007f7a3c5e48e6 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f7a3c706208 R15: 00007ffe55a96518
 </TASK>
INFO: task syz.1.528:11468 blocked for more than 145 seconds.
      Not tainted 6.11.0-rc1-syzkaller-00044-g22f546873149 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.528       state:D stack:27424 pid:11468 tgid:11442 ppid:11039  flags:0x00000004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5188 [inline]
 __schedule+0x17ae/0x4a10 kernel/sched/core.c:6529
 __schedule_loop kernel/sched/core.c:6606 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6621
 percpu_rwsem_wait+0x3c2/0x450 kernel/locking/percpu-rwsem.c:162
 __percpu_down_read+0xee/0x130 kernel/locking/percpu-rwsem.c:177
 percpu_down_read include/linux/percpu-rwsem.h:65 [inline]
 __sb_start_write include/linux/fs.h:1675 [inline]
 sb_start_write+0x184/0x1c0 include/linux/fs.h:1811
 mnt_want_write+0x3f/0x90 fs/namespace.c:515
 filename_create+0x184/0x540 fs/namei.c:3972
 do_mkdirat+0xbd/0x3a0 fs/namei.c:4225
 __do_sys_mkdirat fs/namei.c:4248 [inline]
 __se_sys_mkdirat fs/namei.c:4246 [inline]
 __x64_sys_mkdirat+0x87/0xa0 fs/namei.c:4246
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7a3c5773b9
RSP: 002b:00007f7a3d31d048 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007f7a3c7062e0 RCX: 00007f7a3c5773b9
RDX: 0000000000000000 RSI: 0000000020000000 RDI: ffffffffffffff9c
RBP: 00007f7a3c5e48e6 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f7a3c7062e0 R15: 00007ffe55a96518
 </TASK>

Showing all locks held in the system:
1 lock held by pool_workqueue_/3:
1 lock held by khungtaskd/30:
 #0: ffffffff8e7377a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:326 [inline]
 #0: ffffffff8e7377a0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline]
 #0: ffffffff8e7377a0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6620
2 locks held by kworker/u8:2/35:
2 locks held by getty/4970:
 #0: ffff88802f8510a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
 #1: ffffc900031232f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b5/0x1e10 drivers/tty/n_tty.c:2211
1 lock held by syz.1.528/11465:
 #0: ffff888069342420 (sb_writers#18){++++}-{0:0}, at: direct_splice_actor+0x49/0x220 fs/splice.c:1163
1 lock held by syz.1.528/11466:
 #0: ffff888069342420 (sb_writers#18){++++}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:515
2 locks held by syz.1.528/11467:
 #0: ffff88802d68a5c8 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x24e/0x310 fs/file.c:1191
 #1: ffff888069342420 (sb_writers#18){++++}-{0:0}, at: file_start_write include/linux/fs.h:2876 [inline]
 #1: ffff888069342420 (sb_writers#18){++++}-{0:0}, at: vfs_write+0x227/0xc90 fs/read_write.c:586
1 lock held by syz.1.528/11468:
 #0: ffff888069342420 (sb_writers#18){++++}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:515
1 lock held by syz.0.573/11943:
 #0: ffff8880553aa420 (sb_writers#18){++++}-{0:0}, at: direct_splice_actor+0x49/0x220 fs/splice.c:1163
1 lock held by syz.0.573/11944:
 #0: ffff8880553aa420 (sb_writers#18){++++}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:515
2 locks held by syz.0.573/11945:
 #0: ffff888054b5c0c8 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x24e/0x310 fs/file.c:1191
 #1: ffff8880553aa420 (sb_writers#18){++++}-{0:0}, at: file_start_write include/linux/fs.h:2876 [inline]
 #1: ffff8880553aa420 (sb_writers#18){++++}-{0:0}, at: vfs_write+0x227/0xc90 fs/read_write.c:586
1 lock held by syz.3.626/12352:
 #0: ffff888023d0c420 (sb_writers#18){++++}-{0:0}, at: direct_splice_actor+0x49/0x220 fs/splice.c:1163
1 lock held by syz.3.626/12355:
 #0: ffff888023d0c420 (sb_writers#18){++++}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:515
2 locks held by syz.3.626/12356:
 #0: ffff888023e8f748 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x24e/0x310 fs/file.c:1191
 #1: ffff888023d0c420 (sb_writers#18){++++}-{0:0}, at: file_start_write include/linux/fs.h:2876 [inline]
 #1: ffff888023d0c420 (sb_writers#18){++++}-{0:0}, at: vfs_write+0x227/0xc90 fs/read_write.c:586
1 lock held by syz.3.626/12357:
 #0: 
ffff888023d0c420 (sb_writers#18){++++}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:515
1 lock held by syz.3.626/12358:
 #0: ffff888023d0c420 (sb_writers#18){++++}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:515
1 lock held by syz-executor/12942:
 #0: ffffffff8e73cb78 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:296 [inline]
 #0: ffffffff8e73cb78 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x381/0x830 kernel/rcu/tree_exp.h:958
2 locks held by syz.1.740/13320:
 #0: ffff888055a120e0 (&type->s_umount_key#58){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
 #0: ffff888055a120e0 (&type->s_umount_key#58){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
 #1: ffff8880204fa7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:388 [inline]
 #1: ffff8880204fa7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x274/0xb20 fs/fs-writeback.c:2790
5 locks held by segctord/13339:

=============================================

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.11.0-rc1-syzkaller-00044-g22f546873149 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:93 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119
 nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
 watchdog+0xfee/0x1030 kernel/hung_task.c:379
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 13339 Comm: segctord Not tainted 6.11.0-rc1-syzkaller-00044-g22f546873149 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
RIP: 0010:__local_bh_enable_ip+0x18a/0x200 kernel/softirq.c:390
Code: a4 0b 00 e8 78 8f 43 00 fb 65 8b 05 c8 9b ac 7e 85 c0 75 05 e8 87 7b a9 ff 48 c7 44 24 20 0e 36 e0 45 49 c7 04 1c 00 00 00 00 <65> 48 8b 04 25 28 00 00 00 48 3b 44 24 60 75 52 48 8d 65 d8 5b 41
RSP: 0018:ffffc900000074e0 EFLAGS: 00000202
RAX: 0000000000000302 RBX: 1ffff92000000ea0 RCX: ffffffff81701daa
RDX: dffffc0000000000 RSI: ffffffff8bead560 RDI: ffffffff8c3f8640
RBP: ffffc900000075a0 R08: ffffffff934e9847 R09: 1ffffffff269d308
R10: dffffc0000000000 R11: fffffbfff269d309 R12: dffffc0000000000
R13: 1ffff92000000ea4 R14: ffffc90000007520 R15: 0000000000000201
FS:  0000000000000000(0000) GS:ffff8880b9200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005652aabd4b18 CR3: 000000007cac2000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 neigh_destroy+0x289/0x580 net/core/neighbour.c:908
 neigh_del net/core/neighbour.c:225 [inline]
 neigh_remove_one+0x5cd/0x6e0 net/core/neighbour.c:246
 neigh_forced_gc net/core/neighbour.c:279 [inline]
 neigh_alloc net/core/neighbour.c:485 [inline]
 ___neigh_create+0x43c/0x2470 net/core/neighbour.c:648
 ip6_finish_output2+0x1631/0x1680 net/ipv6/ip6_output.c:128
 ip6_finish_output+0x41e/0x810 net/ipv6/ip6_output.c:222
 NF_HOOK include/linux/netfilter.h:314 [inline]
 ndisc_send_skb+0xab2/0x1380 net/ipv6/ndisc.c:509
 addrconf_rs_timer+0x36e/0x660 net/ipv6/addrconf.c:4040
 call_timer_fn+0x18e/0x650 kernel/time/timer.c:1792
 expire_timers kernel/time/timer.c:1843 [inline]
 __run_timers kernel/time/timer.c:2417 [inline]
 __run_timer_base+0x66a/0x8e0 kernel/time/timer.c:2428
 run_timer_base kernel/time/timer.c:2437 [inline]
 run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2447
 handle_softirqs+0x2c4/0x970 kernel/softirq.c:554
 __do_softirq kernel/softirq.c:588 [inline]
 invoke_softirq kernel/softirq.c:428 [inline]
 __irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:649
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1043
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:console_trylock_spinning kernel/printk/printk.c:2010 [inline]
RIP: 0010:vprintk_emit+0x576/0x770 kernel/printk/printk.c:2347
Code: 04 20 00 4c 21 e3 0f 85 3a 01 00 00 e8 b3 ff 1f 00 4d 89 ec 4d 85 ff 75 07 e8 a6 ff 1f 00 eb 06 e8 9f ff 1f 00 fb 44 8b 3c 24 <48> c7 c7 c0 31 61 8e 31 f6 ba 01 00 00 00 31 c9 41 b8 01 00 00 00
RSP: 0018:ffffc90004477080 EFLAGS: 00000293
RAX: ffffffff81736631 RBX: 0000000000000000 RCX: ffff88801a749e00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90004477170 R08: ffffffff8173660f R09: 1ffffffff269d322
R10: dffffc0000000000 R11: fffffbfff269d323 R12: dffffc0000000000
R13: dffffc0000000000 R14: ffffffff8173648f R15: 000000000000001f
 _printk+0xd5/0x120 kernel/printk/printk.c:2373
 __nilfs_error+0x5dd/0x730 fs/nilfs2/super.c:140
 nilfs_bmap_convert_error fs/nilfs2/bmap.c:35 [inline]
 nilfs_bmap_propagate+0x105/0x120 fs/nilfs2/bmap.c:348
 nilfs_collect_file_data+0x4d/0xd0 fs/nilfs2/segment.c:587
 nilfs_segctor_apply_buffers+0x184/0x340 fs/nilfs2/segment.c:1006
 nilfs_segctor_scan_file+0x791/0xa50 fs/nilfs2/segment.c:1055
 nilfs_segctor_collect_blocks fs/nilfs2/segment.c:1197 [inline]
 nilfs_segctor_collect fs/nilfs2/segment.c:1492 [inline]
 nilfs_segctor_do_construct+0x1def/0x6bd0 fs/nilfs2/segment.c:2064
 nilfs_segctor_construct+0x181/0x6b0 fs/nilfs2/segment.c:2429
 nilfs_segctor_thread_construct fs/nilfs2/segment.c:2537 [inline]
 nilfs_segctor_thread+0x55c/0x11b0 fs/nilfs2/segment.c:2622
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>