INFO: task syz.0.439:10048 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.0.439 state:D stack:27360 pid:10048 tgid:10029 ppid:8456 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_mkdir fs/namei.c:4354 [inline]
__se_sys_mkdir fs/namei.c:4352 [inline]
__x64_sys_mkdir+0x6c/0x80 fs/namei.c:4352
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: 0033:0x7f505917e819
RSP: 002b:00007f5059fcd038 EFLAGS: 00000246 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 00007f5059336080 RCX: 00007f505917e819
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200004c0
RBP: 00007f50591f175e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f5059336080 R15: 00007ffe6be1e768
INFO: task syz.0.439:10051 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.0.439 state:D stack:27360 pid:10051 tgid:10029 ppid:8456 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_read_slowpath kernel/locking/rwsem.c:1084 [inline]
__down_read_common kernel/locking/rwsem.c:1248 [inline]
__down_read kernel/locking/rwsem.c:1261 [inline]
down_read+0x705/0xa40 kernel/locking/rwsem.c:1526
inode_lock_shared include/linux/fs.h:828 [inline]
lookup_slow+0x45/0x70 fs/namei.c:1807
walk_component+0x2e1/0x410 fs/namei.c:2112
lookup_last fs/namei.c:2610 [inline]
path_lookupat+0x16f/0x450 fs/namei.c:2634
filename_lookup+0x2a3/0x670 fs/namei.c:2663
user_path_at+0x3a/0x60 fs/namei.c:3070
do_mount fs/namespace.c:3844 [inline]
__do_sys_mount fs/namespace.c:4057 [inline]
__se_sys_mount+0x297/0x3c0 fs/namespace.c:4034
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: 0033:0x7f505917e819
RSP: 002b:00007f5059fac038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f5059336160 RCX: 00007f505917e819
RDX: 0000000020000080 RSI: 00000000200000c0 RDI: 0000000000000000
RBP: 00007f50591f175e R08: 0000000020000040 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f5059336160 R15: 00007ffe6be1e768
INFO: task syz.0.439:10057 blocked for more than 144 seconds.
Not tainted 6.12.0-syzkaller-09073-g9f16d5e6f220 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.439 state:D stack:27360 pid:10057 tgid:10029 ppid:8456 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_read_slowpath kernel/locking/rwsem.c:1084 [inline]
__down_read_common kernel/locking/rwsem.c:1248 [inline]
__down_read kernel/locking/rwsem.c:1261 [inline]
down_read+0x705/0xa40 kernel/locking/rwsem.c:1526
inode_lock_shared include/linux/fs.h:828 [inline]
lookup_slow+0x45/0x70 fs/namei.c:1807
walk_component+0x2e1/0x410 fs/namei.c:2112
lookup_last fs/namei.c:2610 [inline]
path_lookupat+0x16f/0x450 fs/namei.c:2634
filename_lookup+0x2a3/0x670 fs/namei.c:2663
user_path_at+0x3a/0x60 fs/namei.c:3070
__do_sys_chdir fs/open.c:553 [inline]
__se_sys_chdir+0xbc/0x220 fs/open.c:547
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: 0033:0x7f505917e819
RSP: 002b:00007f5059f8b038 EFLAGS: 00000246 ORIG_RAX: 0000000000000050
RAX: ffffffffffffffda RBX: 00007f5059336240 RCX: 00007f505917e819
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200003c0
RBP: 00007f50591f175e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f5059336240 R15: 00007ffe6be1e768
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
4 locks held by kworker/u8:8/1132:
#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: ffff8880b872a718 (&base->lock){-.-.}-{2:2}, at: lock_timer_base+0x112/0x240 kernel/time/timer.c:1050
#3: ffffffff9a62afb0 (&obj_hash[i].lock){-.-.}-{2:2}, at: debug_object_activate+0x17f/0x580 lib/debugobjects.c:818
2 locks held by dhcpcd/5507:
2 locks held by getty/5592:
#0: ffff88814d7530a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc9000369b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211
2 locks held by syz-executor/8374:
#0: ffff8880605700e0 (&type->s_umount_key#56){+.+.}-{4:4}, at: __super_lock fs/super.c:56 [inline]
#0: ffff8880605700e0 (&type->s_umount_key#56){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff8880605700e0 (&type->s_umount_key#56){+.+.}-{4:4}, at: deactivate_super+0xb5/0xf0 fs/super.c:505
#1: ffffffff8ed55fe8 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb2/0x530 fs/jfs/jfs_logmgr.c:1444
3 locks held by syz.0.439/10031:
2 locks held by syz.0.439/10048:
#0: ffff88814d620420 (sb_writers#42){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:515
#1: ffff88805685c180 (&type->i_mutex_dir_key#32/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:853 [inline]
#1: ffff88805685c180 (&type->i_mutex_dir_key#32/1){+.+.}-{4:4}, at: filename_create+0x260/0x540 fs/namei.c:4080
1 lock held by syz.0.439/10051:
#0: ffff88805685c180 (&type->i_mutex_dir_key#33){.+.+}-{4:4}, at: inode_lock_shared include/linux/fs.h:828 [inline]
#0: ffff88805685c180 (&type->i_mutex_dir_key#33){.+.+}-{4:4}, at: lookup_slow+0x45/0x70 fs/namei.c:1807
1 lock held by syz.0.439/10057:
#0: ffff88805685c180 (&type->i_mutex_dir_key#33){.+.+}-{4:4}, at: inode_lock_shared include/linux/fs.h:828 [inline]
#0: ffff88805685c180 (&type->i_mutex_dir_key#33){.+.+}-{4:4}, at: lookup_slow+0x45/0x70 fs/namei.c:1807
2 locks held by syz-executor/10861:
#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: ffff8880b873e758 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:598
1 lock held by syz.6.615/12039:
2 locks held by syz.0.616/12046:
5 locks held by syz.7.610/12067:
1 lock held by dhcpcd-run-hook/12066:
=============================================
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: 10031 Comm: syz.0.439 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:hlock_class kernel/locking/lockdep.c:228 [inline]
RIP: 0010:mark_lock+0xa2/0x360 kernel/locking/lockdep.c:4727
Code: 00 8b 1b 81 e3 ff 1f 00 00 48 89 d8 48 c1 e8 06 48 8d 3c c5 80 88 2b 94 be 08 00 00 00 e8 c6 0a 8c 00 48 0f a3 1d 0e fa b9 12 <73> 10 48 69 c3 c8 00 00 00 48 8d 98 40 07 c3 93 eb 68 48 c7 c0 c0
RSP: 0018:ffffc90003f96178 EFLAGS: 00000057
RAX: 0000000000000001 RBX: 0000000000000c62 RCX: ffffffff81718e6a
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff942b8a08
RBP: 0000000000000007 R08: ffffffff942b8a0f R09: 1ffffffff2857141
R10: dffffc0000000000 R11: fffffbfff2857142 R12: ffff8880307e4700
R13: dffffc0000000000 R14: 0000000000000080 R15: ffff8880307e46e0
FS: 00007f5059fee6c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2f4fbff8 CR3: 0000000079b6a000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
mark_held_locks kernel/locking/lockdep.c:4321 [inline]
__trace_hardirqs_on_caller kernel/locking/lockdep.c:4347 [inline]
lockdep_hardirqs_on_prepare+0x3a5/0x780 kernel/locking/lockdep.c:4406
trace_hardirqs_on+0x28/0x40 kernel/trace/trace_preemptirq.c:47
__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline]
_raw_spin_unlock_irq+0x23/0x50 kernel/locking/spinlock.c:202
spin_unlock_irq include/linux/spinlock.h:401 [inline]
__remove_mapping+0x8de/0x1390 mm/vmscan.c:792
shrink_folio_list+0x3081/0x8fe0 mm/vmscan.c:1467
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+0x4b8/0xb10 mm/vmscan.c:6609
try_charge_memcg+0x8c7/0x1150 mm/memcontrol.c:2238
obj_cgroup_charge_pages+0x91/0x230 mm/memcontrol.c:2646
obj_cgroup_charge+0x380/0x5d0 mm/memcontrol.c:2937
__memcg_slab_post_alloc_hook+0x1b1/0x7e0 mm/memcontrol.c:2998
memcg_slab_post_alloc_hook mm/slub.c:2156 [inline]
slab_post_alloc_hook mm/slub.c:4095 [inline]
slab_alloc_node mm/slub.c:4134 [inline]
kmem_cache_alloc_noprof+0x1de/0x2a0 mm/slub.c:4141
alloc_buffer_head+0x2a/0x290 fs/buffer.c:3015
folio_alloc_buffers+0x2bc/0x660 fs/buffer.c:924
create_empty_buffers+0x3a/0x740 fs/buffer.c:1662
block_read_full_folio+0x25c/0xcd0 fs/buffer.c:2377
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_one_qstr_excl+0x11f/0x260 fs/namei.c:1692
filename_create+0x297/0x540 fs/namei.c:4081
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: 0033:0x7f505917e819
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:00007f5059fee038 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007f5059335fa0 RCX: 00007f505917e819
RDX: 0000000000000000 RSI: 0000000020000340 RDI: ffffffffffffff9c
RBP: 00007f50591f175e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f5059335fa0 R15: 00007ffe6be1e768