INFO: task syz-executor.5:29034 blocked for more than 143 seconds.
Not tainted 6.9.0-rc5-syzkaller-00159-gc942a0cd3603 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.5 state:D stack:29424 pid:29034 tgid:29029 ppid:27314 flags:0x00000006
Call Trace:
context_switch kernel/sched/core.c:5409 [inline]
__schedule+0x17e8/0x4a50 kernel/sched/core.c:6746
__schedule_loop kernel/sched/core.c:6823 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6838
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6895
__mutex_lock_common kernel/locking/mutex.c:684 [inline]
__mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752
__fdget_pos+0x259/0x320 fs/file.c:1191
fdget_pos include/linux/file.h:76 [inline]
__do_sys_getdents64 fs/readdir.c:405 [inline]
__se_sys_getdents64+0x1dc/0x4f0 fs/readdir.c:394
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f265567dea9
RSP: 002b:00007f26564700c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000d9
RAX: ffffffffffffffda RBX: 00007f26557ac050 RCX: 00007f265567dea9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004
RBP: 00007f26556ca4a4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f26557ac050 R15: 00007ffc356b68d8
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffffffff8e334d20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline]
#0: ffffffff8e334d20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:781 [inline]
#0: ffffffff8e334d20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614
3 locks held by kworker/u8:2/34:
2 locks held by getty/4841:
#0: ffff88802a8eb0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc9000312b2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b5/0x1e10 drivers/tty/n_tty.c:2201
2 locks held by kworker/1:6/13388:
#0: ffff8880b953e698 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:559
#1: ffff8880b9528948 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x441/0x770 kernel/sched/psi.c:988
3 locks held by syz-executor.5/29031:
1 lock held by syz-executor.5/29034:
#0: ffff88803836c848 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x259/0x320 fs/file.c:1191
1 lock held by syz-executor.4/29497:
#0: ffff88806bd560e0 (&type->s_umount_key#72){++++}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff88806bd560e0 (&type->s_umount_key#72){++++}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff88806bd560e0 (&type->s_umount_key#72){++++}-{3:3}, at: deactivate_super+0xb5/0xf0 fs/super.c:504
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.9.0-rc5-syzkaller-00159-gc942a0cd3603 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114
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:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
watchdog+0xfde/0x1020 kernel/hung_task.c:380
kthread+0x2f2/0x390 kernel/kthread.c:388
ret_from_fork+0x4d/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 PID: 29031 Comm: syz-executor.5 Not tainted 6.9.0-rc5-syzkaller-00159-gc942a0cd3603 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:instrument_atomic_read include/linux/instrumented.h:68 [inline]
RIP: 0010:_test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
RIP: 0010:hlock_class kernel/locking/lockdep.c:228 [inline]
RIP: 0010:mark_lock+0x90/0x350 kernel/locking/lockdep.c:4656
Code: 89 d8 48 c1 e8 03 42 0f b6 04 28 84 c0 0f 85 30 02 00 00 8b 1b 81 e3 ff 1f 00 00 48 89 d8 48 c1 e8 06 48 8d 3c c5 00 55 f3 92 08 00 00 00 e8 46 78 87 00 48 0f a3 1d 1e 67 80 11 73 10 48 69
RSP: 0018:ffffc90000a08848 EFLAGS: 00000056
RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000004
RDX: 0000000000000004 RSI: ffff888040718b50 RDI: ffffffff92f35500
RBP: 0000000000000004 R08: ffffffff92f3550f R09: 1ffffffff25e6aa1
R10: dffffc0000000000 R11: fffffbfff25e6aa2 R12: 0000000000000001
R13: dffffc0000000000 R14: 0000000000000010 R15: ffff888040718b50
FS: 00007f26564916c0(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f43dbc06d58 CR3: 00000000110a6000 CR4: 0000000000350ef0
Call Trace:
__lock_acquire+0xbcd/0x1fd0 kernel/locking/lockdep.c:5091
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162
debug_object_deactivate+0x158/0x390 lib/debugobjects.c:763
debug_timer_deactivate kernel/time/timer.c:842 [inline]
debug_deactivate kernel/time/timer.c:886 [inline]
detach_timer+0x24/0x320 kernel/time/timer.c:933
expire_timers kernel/time/timer.c:1827 [inline]
__run_timers kernel/time/timer.c:2418 [inline]
__run_timer_base+0x5ef/0x8e0 kernel/time/timer.c:2429
run_timer_base kernel/time/timer.c:2438 [inline]
run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2448
__do_softirq+0x2c8/0x980 kernel/softirq.c:554
invoke_softirq kernel/softirq.c:428 [inline]
__irq_exit_rcu+0xf2/0x1c0 kernel/softirq.c:633
irq_exit_rcu+0x9/0x30 kernel/softirq.c:645
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
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:should_resched arch/x86/include/asm/preempt.h:103 [inline]
RIP: 0010:unwind_next_frame+0x1e6c/0x2a00 arch/x86/kernel/unwind_orc.c:672
Code: 00 e9 06 fd ff ff e8 a3 a3 54 00 eb 0c e8 9c a3 54 00 eb 05 e8 95 a3 54 00 bf 01 00 00 00 e8 7b 49 24 00 65 8b 1d ec 75 c2 7e <31> ff 89 de e8 bb a7 54 00 85 db 0f 84 9d 02 00 00 e8 6e a3 54 00
RSP: 0018:ffffc90003d5dc08 EFLAGS: 00000297
RAX: 0000000080000001 RBX: 0000000080000000 RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffffc90003d5e180 RDI: 0000000000000001
RBP: ffffc90003d5dce0 R08: ffffffff81415d65 R09: ffffffff814158df
R10: 0000000000000003 R11: ffff888040718000 R12: ffffc90003d5e260
R13: dffffc0000000000 R14: ffffc90003d58000 R15: ffffc90003d5e268
arch_stack_walk+0x151/0x1b0 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+0xa6/0xe0 mm/kasan/common.c:240
__kasan_slab_free+0x37/0x60 mm/kasan/common.c:256
kasan_slab_free include/linux/kasan.h:184 [inline]
slab_free_hook mm/slub.c:2106 [inline]
slab_free mm/slub.c:4280 [inline]
kmem_cache_free+0x10b/0x2c0 mm/slub.c:4344
free_buffer_head+0x55/0x240 fs/buffer.c:3017
try_to_free_buffers+0x311/0x5f0 fs/buffer.c:2958
shrink_folio_list+0x2828/0x8ed0 mm/vmscan.c:1376
evict_folios+0xb2e/0x2710 mm/vmscan.c:4537
try_to_shrink_lruvec+0xb6b/0xe90 mm/vmscan.c:4733
lru_gen_shrink_lruvec mm/vmscan.c:4876 [inline]
shrink_lruvec+0x586/0x3090 mm/vmscan.c:5653
shrink_node_memcgs mm/vmscan.c:5873 [inline]
shrink_node+0xa12/0x4310 mm/vmscan.c:5908
shrink_zones mm/vmscan.c:6152 [inline]
do_try_to_free_pages+0x780/0x1d60 mm/vmscan.c:6214
try_to_free_mem_cgroup_pages+0x465/0xac0 mm/vmscan.c:6529
try_charge_memcg+0x6da/0x18a0 mm/memcontrol.c:2783
try_charge mm/memcontrol.c:2931 [inline]
charge_memcg+0xa2/0x160 mm/memcontrol.c:7284
__mem_cgroup_charge+0x27/0x80 mm/memcontrol.c:7299
mem_cgroup_charge include/linux/memcontrol.h:691 [inline]
__filemap_add_folio+0x3d8/0x1a80 mm/filemap.c:864
filemap_add_folio+0x11e/0x570 mm/filemap.c:947
do_read_cache_folio+0x10a/0x820 mm/filemap.c:3714
do_read_cache_page+0x30/0x200 mm/filemap.c:3813
read_mapping_page include/linux/pagemap.h:888 [inline]
dir_get_page fs/sysv/dir.c:64 [inline]
sysv_readdir+0x190/0x3e0 fs/sysv/dir.c:92
iterate_dir+0x53b/0x6f0 fs/readdir.c:110
__do_sys_getdents64 fs/readdir.c:409 [inline]
__se_sys_getdents64+0x20d/0x4f0 fs/readdir.c:394
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f265567dea9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f26564910c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000d9
RAX: ffffffffffffffda RBX: 00007f26557abf80 RCX: 00007f265567dea9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004
RBP: 00007f26556ca4a4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f26557abf80 R15: 00007ffc356b68d8