INFO: task syz.2.22:6026 blocked for more than 143 seconds.
Not tainted 6.12.0-rc7-syzkaller-00012-g3022e9d00ebe #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.22 state:D stack:27392 pid:6026 tgid:6021 ppid:5827 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0x17fa/0x4bd0 kernel/sched/core.c:6693
__schedule_loop kernel/sched/core.c:6770 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6785
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6842
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:850 [inline]
lock_rename fs/namei.c:3161 [inline]
do_renameat2+0x62c/0x13f0 fs/namei.c:5105
__do_sys_rename fs/namei.c:5217 [inline]
__se_sys_rename fs/namei.c:5215 [inline]
__x64_sys_rename+0x82/0x90 fs/namei.c:5215
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: 0033:0x7fee4c77e719
RSP: 002b:00007fee4d523038 EFLAGS: 00000246 ORIG_RAX: 0000000000000052
RAX: ffffffffffffffda RBX: 00007fee4c936130 RCX: 00007fee4c77e719
RDX: 0000000000000000 RSI: 0000000020000780 RDI: 0000000020000000
RBP: 00007fee4c7f1616 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007fee4c936130 R15: 00007ffd9aff4c48
Showing all locks held in the system:
2 locks held by kworker/u8:0/11:
#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: ffffc90000107d00 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline]
#1: ffffc90000107d00 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310
1 lock held by khungtaskd/30:
#0: ffffffff8e937da0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8e937da0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8e937da0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6720
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: ffffc90000ab7d00 ((reaper_work).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline]
#1: ffffc90000ab7d00 ((reaper_work).work){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310
2 locks held by kworker/u8:7/3506:
#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: ffffc9000bc77d00 (connector_reaper_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline]
#1: ffffc9000bc77d00 (connector_reaper_work){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310
2 locks held by kworker/u8:8/3541:
2 locks held by getty/5585:
#0: ffff88803174e0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211
2 locks held by syz.2.22/6025:
2 locks held by syz.2.22/6026:
#0: ffff888027010420 (sb_writers#21){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:515
#1: ffff888078000180 (&type->i_mutex_dir_key#14/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:850 [inline]
#1: ffff888078000180 (&type->i_mutex_dir_key#14/1){+.+.}-{3:3}, at: lock_rename fs/namei.c:3161 [inline]
#1: ffff888078000180 (&type->i_mutex_dir_key#14/1){+.+.}-{3:3}, at: do_renameat2+0x62c/0x13f0 fs/namei.c:5105
1 lock held by syz-executor/7129:
#0: ffffffff8fcc1408 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffffffff8fcc1408 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x6e6/0xcf0 net/core/rtnetlink.c:6672
2 locks held by syz-executor/7212:
#0: ffffffff8fcc1408 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffffffff8fcc1408 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x6e6/0xcf0 net/core/rtnetlink.c:6672
#1: ffffffff8e93d338 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:297 [inline]
#1: ffffffff8e93d338 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x381/0x830 kernel/rcu/tree_exp.h:976
1 lock held by syz.7.201/7397:
#0: ffff88802799c0e0 (&type->s_umount_key#72/1){+.+.}-{3:3}, at: alloc_super+0x221/0x9d0 fs/super.c:344
2 locks held by syz.6.202/7403:
#0: ffffffff8eec2f08 (uuid_mutex){+.+.}-{3:3}, at: btrfs_get_tree_super fs/btrfs/super.c:1843 [inline]
#0: ffffffff8eec2f08 (uuid_mutex){+.+.}-{3:3}, at: btrfs_get_tree+0x2f4/0x1a10 fs/btrfs/super.c:2107
#1: ffffffff8e9f91e8 (lock#3){+.+.}-{3:3}, at: __lru_add_drain_all+0x66/0x560 mm/swap.c:843
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-rc7-syzkaller-00012-g3022e9d00ebe #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 6025 Comm: syz.2.22 Not tainted 6.12.0-rc7-syzkaller-00012-g3022e9d00ebe #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
RIP: 0010:unwind_next_frame+0x2e8/0x22d0 arch/x86/kernel/unwind_orc.c:494
Code: fc ff ff ff 48 8d 8c 11 08 00 29 90 4c 39 e1 0f 83 61 0d 00 00 48 c7 c0 08 00 29 90 49 29 c4 48 c7 c6 10 83 9c 90 49 c1 fc 02 <4b> 8d 14 64 48 01 d2 48 01 f2 0f 84 42 01 00 00 48 8d 5a 04 4c 8d
RSP: 0000:ffffc90004aee1d0 EFLAGS: 00000246
RAX: ffffffff909775bc RBX: ffffffff909775c0 RCX: ffffffff909775c4
RDX: 00000000000b0001 RSI: ffffffff914233a4 RDI: ffffffff814156e0
RBP: ffffffff909775c0 R08: 0000000000000003 R09: ffffc90004aee390
R10: ffffc90004aee2f0 R11: ffffffff81809210 R12: 0000000000000000
R13: ffffc90004aee2a0 R14: ffffffff909775c4 R15: ffffffff8bbe8532
FS: 00007fee4d5446c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007feb7e2de440 CR3: 000000007afea000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579
poison_slab_object mm/kasan/common.c:247 [inline]
__kasan_slab_free+0x59/0x70 mm/kasan/common.c:264
kasan_slab_free include/linux/kasan.h:230 [inline]
slab_free_hook mm/slub.c:2342 [inline]
slab_free mm/slub.c:4579 [inline]
kmem_cache_free+0x1a2/0x420 mm/slub.c:4681
free_buffer_head+0x54/0x240 fs/buffer.c:3036
try_to_free_buffers+0x311/0x5f0 fs/buffer.c:2977
shrink_folio_list+0x23d1/0x8fe0 mm/vmscan.c:1433
shrink_inactive_list mm/vmscan.c:1960 [inline]
shrink_list mm/vmscan.c:2197 [inline]
shrink_lruvec+0x16d2/0x2f20 mm/vmscan.c:5715
shrink_node_memcgs mm/vmscan.c:5917 [inline]
shrink_node+0x12a4/0x2df0 mm/vmscan.c:5957
shrink_zones mm/vmscan.c:6201 [inline]
do_try_to_free_pages+0x69d/0x1b20 mm/vmscan.c:6263
try_to_free_mem_cgroup_pages+0x4b8/0xb10 mm/vmscan.c:6595
try_charge_memcg+0x8c2/0x1170 mm/memcontrol.c:2207
try_charge mm/memcontrol-v1.h:19 [inline]
charge_memcg+0xa6/0x1e0 mm/memcontrol.c:4468
__mem_cgroup_charge+0x27/0x80 mm/memcontrol.c:4483
mem_cgroup_charge include/linux/memcontrol.h:694 [inline]
filemap_add_folio+0xb3/0x650 mm/filemap.c:967
do_read_cache_folio+0x341/0x850 mm/filemap.c:3792
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_one_qstr_excl+0x11f/0x260 fs/namei.c:1633
filename_create+0x297/0x540 fs/namei.c:4027
do_mknodat+0x18b/0x5b0 fs/namei.c:4172
__do_sys_mknodat fs/namei.c:4213 [inline]
__se_sys_mknodat fs/namei.c:4210 [inline]
__x64_sys_mknodat+0xa7/0xc0 fs/namei.c:4210
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: 0033:0x7fee4c77e719
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:00007fee4d544038 EFLAGS: 00000246 ORIG_RAX: 0000000000000103
RAX: ffffffffffffffda RBX: 00007fee4c936058 RCX: 00007fee4c77e719
RDX: 0000000000000010 RSI: 0000000020000300 RDI: ffffffffffffff9c
RBP: 00007fee4c7f1616 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000103 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007fee4c936058 R15: 00007ffd9aff4c48