INFO: task syz.0.57:6397 blocked for more than 143 seconds.
Not tainted 6.12.0-syzkaller-11677-g2ba9f676d0a2 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.57 state:D stack:23840 pid:6397 tgid:6372 ppid:5816 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: 0033:0x7ff5e817f0b7
RSP: 002b:00007ff5e8feee88 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007ff5e8feef10 RCX: 00007ff5e817f0b7
RDX: 00000000000001ff RSI: 00000000200002c0 RDI: 00000000ffffff9c
RBP: 0000000000000000 R08: 000000002001fdc0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000200002c0
R13: 00007ff5e8feeed0 R14: 0000000000000000 R15: 0000000000000000
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff8e93c5a0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8e93c5a0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8e93c5a0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6744
2 locks held by udevd/5193:
2 locks held by getty/5574:
#0: ffff88803124d0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90002ff62f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211
3 locks held by udevd/6199:
1 lock held by syz.0.57/6394:
1 lock held by syz.0.57/6397:
#0: ffff88805f5f4180 (&type->i_mutex_dir_key#19/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:853 [inline]
#0: ffff88805f5f4180 (&type->i_mutex_dir_key#19/1){+.+.}-{4:4}, at: filename_create+0x260/0x540 fs/namei.c:4080
1 lock held by syz-executor/6598:
2 locks held by syz.2.216/7845:
#0: ffff8880b873e758 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:598
#1: ffff8880b8728948 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x41d/0x7a0 kernel/sched/psi.c:987
3 locks held by syz.8.229/8004:
#0: ffff8880b873e758 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:598
#1: ffff8880b8728948 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x41d/0x7a0 kernel/sched/psi.c:987
#2: ffff88802608f4e8 (&(&sig->stats_lock)->lock){....}-{3:3}, at: spin_lock include/linux/spinlock.h:351 [inline]
#2: ffff88802608f4e8 (&(&sig->stats_lock)->lock){....}-{3:3}, at: write_seqlock include/linux/seqlock.h:853 [inline]
#2: ffff88802608f4e8 (&(&sig->stats_lock)->lock){....}-{3:3}, at: __exit_signal kernel/exit.c:187 [inline]
#2: ffff88802608f4e8 (&(&sig->stats_lock)->lock){....}-{3:3}, at: release_task+0x83a/0x1830 kernel/exit.c:257
1 lock held by cmp/8023:
#0: ffff8880b873e758 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:598
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-syzkaller-11677-g2ba9f676d0a2 #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:234 [inline]
watchdog+0xff6/0x1040 kernel/hung_task.c:397
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: 6394 Comm: syz.0.57 Not tainted 6.12.0-syzkaller-11677-g2ba9f676d0a2 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:local_lock_release include/linux/local_lock_internal.h:36 [inline]
RIP: 0010:refill_obj_stock+0x350/0x650 mm/memcontrol.c:2893
Code: ff 49 c7 c4 f8 96 03 00 4c 03 23 48 c7 c0 c0 f9 3c 9a 48 c1 e8 03 42 0f b6 04 28 84 c0 0f 85 14 02 00 00 83 3d 10 55 36 18 00 <75> 29 49 8d 5c 24 28 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48
RSP: 0000:ffffc900038b6140 EFLAGS: 00000046
RAX: 0000000000000004 RBX: ffffffff8e31ba90 RCX: ffffffff9a3cf903
RDX: 0000000000000f60 RSI: ffffffff8c608440 RDI: ffffffff8c608400
RBP: ffffc900038b6240 R08: ffffffff942c8987 R09: 1ffffffff2859130
R10: dffffc0000000000 R11: fffffbfff2859131 R12: ffff8880b86396f8
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8880b8639748
FS: 00007ff5e90106c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff5e90319a0 CR3: 0000000029a90000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
obj_cgroup_uncharge mm/memcontrol.c:2946 [inline]
__memcg_slab_free_hook+0x1df/0x310 mm/memcontrol.c:3033
memcg_slab_free_hook mm/slub.c:2178 [inline]
slab_free mm/slub.c:4595 [inline]
kmem_cache_free+0x222/0x410 mm/slub.c:4700
free_buffer_head+0x54/0x240 fs/buffer.c:3031
try_to_free_buffers+0x311/0x5f0 fs/buffer.c:2972
shrink_folio_list+0x23d1/0x8fe0 mm/vmscan.c:1433
shrink_inactive_list mm/vmscan.c:1960 [inline]
shrink_list mm/vmscan.c:2198 [inline]
shrink_lruvec+0x16db/0x2f30 mm/vmscan.c:5727
shrink_node_memcgs mm/vmscan.c:5929 [inline]
shrink_node+0x12a4/0x2e10 mm/vmscan.c:5970
shrink_zones mm/vmscan.c:6215 [inline]
do_try_to_free_pages+0x69d/0x1b20 mm/vmscan.c:6277
try_to_free_mem_cgroup_pages+0x4b8/0xaf0 mm/vmscan.c:6609
try_charge_memcg+0x8c7/0x1150 mm/memcontrol.c:2238
try_charge mm/memcontrol-v1.h:19 [inline]
charge_memcg+0xa6/0x1e0 mm/memcontrol.c:4497
__mem_cgroup_charge+0x27/0x80 mm/memcontrol.c:4512
mem_cgroup_charge include/linux/memcontrol.h:646 [inline]
filemap_add_folio+0xb3/0x650 mm/filemap.c:966
do_read_cache_folio+0x341/0x850 mm/filemap.c:3793
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_open fs/open.c:1425 [inline]
__se_sys_open fs/open.c:1421 [inline]
__x64_sys_open+0x225/0x270 fs/open.c:1421
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: 0033:0x7ff5e8180849
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:00007ff5e9010058 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007ff5e8346080 RCX: 00007ff5e8180849
RDX: 0000000000000000 RSI: 000000000014927e RDI: 0000000020000180
RBP: 00007ff5e81f3986 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007ff5e8346080 R15: 00007fffecedc238