INFO: task syz.7.199:7812 blocked for more than 143 seconds.
Not tainted 6.12.0-syzkaller-09073-g9f16d5e6f220 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.7.199 state:D stack:24824 pid:7812 tgid:7785 ppid:7013 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5369 [inline]
__schedule+0x17fb/0x4be0 kernel/sched/core.c:6756
__schedule_loop kernel/sched/core.c:6833 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6848
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6905
rwsem_down_write_slowpath+0xeee/0x13b0 kernel/locking/rwsem.c:1176
__down_write_common kernel/locking/rwsem.c:1304 [inline]
__down_write kernel/locking/rwsem.c:1313 [inline]
down_write_nested+0x1e0/0x220 kernel/locking/rwsem.c:1694
inode_lock_nested include/linux/fs.h:853 [inline]
filename_create+0x260/0x540 fs/namei.c:4080
do_mkdirat+0xbd/0x3a0 fs/namei.c:4326
__do_sys_mkdirat fs/namei.c:4349 [inline]
__se_sys_mkdirat fs/namei.c:4347 [inline]
__x64_sys_mkdirat+0x87/0xa0 fs/namei.c:4347
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: 0033:0x7fe46457d0b7
RSP: 002b:00007fe465404e68 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007fe465404ef0 RCX: 00007fe46457d0b7
RDX: 00000000000001ff RSI: 0000000020000140 RDI: 00000000ffffff9c
RBP: 0000000020000180 R08: 0000000020000000 R09: 0000000000000000
R10: 0000000020000180 R11: 0000000000000246 R12: 0000000020000140
R13: 00007fe465404eb0 R14: 0000000000000000 R15: 0000000020001480
Showing all locks held in the system:
1 lock held by pool_workqueue_/3:
#0: ffffffff8e941ab8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:329 [inline]
#0: ffffffff8e941ab8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x451/0x830 kernel/rcu/tree_exp.h:976
1 lock held by khungtaskd/30:
#0: ffffffff8e93c520 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8e93c520 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8e93c520 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6744
2 locks held by kworker/u8:2/35:
#0: ffff88801ac89148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline]
#0: ffff88801ac89148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1850 kernel/workqueue.c:3310
#1: ffff8880b8628948 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x41d/0x7a0 kernel/sched/psi.c:987
4 locks held by kworker/u8:8/3525:
#0: ffff88801baeb148 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline]
#0: ffff88801baeb148 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1850 kernel/workqueue.c:3310
#1: ffffc9000c40fd00 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline]
#1: ffffc9000c40fd00 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310
#2: ffffffff8fcbb2d0 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0x16a/0xcc0 net/core/net_namespace.c:586
#3: ffff888064bb14e8 (&wg->device_update_lock){+.+.}-{4:4}, at: wg_destruct+0x110/0x2e0 drivers/net/wireguard/device.c:249
2 locks held by getty/5592:
#0: ffff88803189b0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900033132f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211
3 locks held by kworker/0:7/6330:
#0: ffff88801ac80948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline]
#0: ffff88801ac80948 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1850 kernel/workqueue.c:3310
#1: ffffc90004277d00 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline]
#1: ffffc90004277d00 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310
#2: ffff88803dde6240 (&data->fib_lock){+.+.}-{4:4}, at: nsim_fib_event_work+0x2d1/0x4130 drivers/net/netdevsim/fib.c:1490
1 lock held by udevd/6393:
#0: ffffffff8eec0248 (uuid_mutex){+.+.}-{4:4}, at: btrfs_control_ioctl+0x150/0x410 fs/btrfs/super.c:2250
2 locks held by syz-executor/7762:
#0: ffff88806b8100e0 (&type->s_umount_key#111){+.+.}-{4:4}, at: __super_lock fs/super.c:56 [inline]
#0: ffff88806b8100e0 (&type->s_umount_key#111){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff88806b8100e0 (&type->s_umount_key#111){+.+.}-{4:4}, at: deactivate_super+0xb5/0xf0 fs/super.c:505
#1: ffff888067b80278 (&c->state_lock){+.+.}-{4:4}, at: __bch2_fs_stop+0xfd/0x5c0 fs/bcachefs/super.c:620
4 locks held by syz.7.199/7793:
2 locks held by syz.7.199/7812:
#0: ffff88802a2d0420 (sb_writers#34){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:515
#1: ffff88805f65c180 (&type->i_mutex_dir_key#23/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:853 [inline]
#1: ffff88805f65c180 (&type->i_mutex_dir_key#23/1){+.+.}-{4:4}, at: filename_create+0x260/0x540 fs/namei.c:4080
3 locks held by syz-executor/9160:
3 locks held by syz.9.366/9464:
#0: ffff888143be40e0 (&type->s_umount_key#70/1){+.+.}-{4:4}, at: alloc_super+0x221/0x9d0 fs/super.c:344
#1: ffffffff8eec0248 (uuid_mutex){+.+.}-{4:4}, at: btrfs_close_devices+0xc0/0x5c0 fs/btrfs/volumes.c:1269
#2: ffffffff8ea00408 (lock#3){+.+.}-{4:4}, at: __lru_add_drain_all+0x66/0x560 mm/swap.c:798
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-syzkaller-09073-g9f16d5e6f220 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
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+0xff4/0x1040 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
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 7793 Comm: syz.7.199 Not tainted 6.12.0-syzkaller-09073-g9f16d5e6f220 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:xa_entry include/linux/xarray.h:1220 [inline]
RIP: 0010:xas_descend lib/xarray.c:207 [inline]
RIP: 0010:xas_load+0x494/0x5c0 lib/xarray.c:245
Code: 52 eb db f5 e9 f5 fb ff ff e8 18 43 c0 f5 89 c3 31 ff 89 c6 e8 7d ef db f5 85 db 4c 8b 64 24 08 48 bd 00 00 00 00 00 fc ff df <74> 0a e8 25 eb db f5 e9 2a fd ff ff e8 4b f5 04 00 89 c3 31 ff 89
RSP: 0018:ffffc90003df6fe0 EFLAGS: 00000202
RAX: 0000000000000002 RBX: 0000000000000001 RCX: 0000000080000000
RDX: ffff88802b72bc00 RSI: 0000000000000001 RDI: 0000000000000000
RBP: dffffc0000000000 R08: ffffffff8bb9f483 R09: 1ffffffff2857110
R10: dffffc0000000000 R11: fffffbfff2857111 R12: ffffc90003df70a0
R13: 0000000000000034 R14: ffffea000147b380 R15: ffff8880236e1418
FS: 00007fe4654266c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055555a8ca808 CR3: 000000006f374000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
filemap_get_entry+0x1f0/0x3b0 mm/filemap.c:1841
__filemap_get_folio+0x71/0xbd0 mm/filemap.c:1886
grow_dev_folio fs/buffer.c:1039 [inline]
grow_buffers fs/buffer.c:1105 [inline]
__getblk_slow fs/buffer.c:1131 [inline]
bdev_getblk+0x1d8/0x550 fs/buffer.c:1431
__bread_gfp+0x86/0x400 fs/buffer.c:1485
sb_bread include/linux/buffer_head.h:346 [inline]
get_branch+0x2c3/0x6e0 fs/sysv/itree.c:102
get_block+0x180/0x16d0 fs/sysv/itree.c:222
block_read_full_folio+0x418/0xcd0 fs/buffer.c:2396
filemap_read_folio+0x14b/0x630 mm/filemap.c:2366
do_read_cache_folio+0x3f5/0x850 mm/filemap.c:3826
read_mapping_folio include/linux/pagemap.h:1011 [inline]
dir_get_folio fs/sysv/dir.c:64 [inline]
sysv_find_entry+0x16a/0x4b0 fs/sysv/dir.c:154
sysv_inode_by_name+0x98/0x2a0 fs/sysv/dir.c:370
sysv_lookup+0x6b/0xe0 fs/sysv/namei.c:38
lookup_open fs/namei.c:3627 [inline]
open_last_lookups fs/namei.c:3748 [inline]
path_openat+0x11a7/0x3590 fs/namei.c:3984
do_filp_open+0x27f/0x4e0 fs/namei.c:4014
do_sys_openat2+0x13e/0x1d0 fs/open.c:1402
do_sys_open fs/open.c:1417 [inline]
__do_sys_openat fs/open.c:1433 [inline]
__se_sys_openat fs/open.c:1428 [inline]
__x64_sys_openat+0x247/0x2a0 fs/open.c:1428
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: 0033:0x7fe46457e819
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fe465426038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fe464736080 RCX: 00007fe46457e819
RDX: 0000000000000241 RSI: 0000000020002a00 RDI: ffffffffffffff9c
RBP: 00007fe4645f175e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fe464736080 R15: 00007fff5eff7a48