INFO: task syz-executor.0:14858 blocked for more than 143 seconds.
Not tainted 6.9.0-rc5-syzkaller-00007-g4d2008430ce8 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:28000 pid:14858 tgid:14854 ppid:11598 flags:0x00000006
Call Trace:
context_switch kernel/sched/core.c:5409 [inline]
__schedule+0xf15/0x5d00 kernel/sched/core.c:6746
__schedule_loop kernel/sched/core.c:6823 [inline]
schedule+0xe7/0x350 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+0x5b8/0x9c0 kernel/locking/mutex.c:752
__fdget_pos+0xeb/0x180 fs/file.c:1191
fdget_pos include/linux/file.h:76 [inline]
__do_sys_getdents64 fs/readdir.c:405 [inline]
__se_sys_getdents64 fs/readdir.c:394 [inline]
__x64_sys_getdents64+0x117/0x2e0 fs/readdir.c:394
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcf/0x260 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8afb07dea9
RSP: 002b:00007f8afbe7e0c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000d9
RAX: ffffffffffffffda RBX: 00007f8afb1ac050 RCX: 00007f8afb07dea9
RDX: 000000000000000a RSI: 0000000020000240 RDI: 0000000000000004
RBP: 00007f8afb0ca4a4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f8afb1ac050 R15: 00007ffc9ed9bb28
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0:
ffffffff8d7b0e20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline]
ffffffff8d7b0e20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:781 [inline]
ffffffff8d7b0e20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6614
2 locks held by kworker/u8:3/43:
2 locks held by getty/4829:
#0: ffff88802ad6e0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc8/0x1490 drivers/tty/n_tty.c:2201
1 lock held by syz-fuzzer/5178:
5 locks held by kworker/1:5/5173:
#0: ffff88801aaca948 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x1296/0x1ac0 kernel/workqueue.c:3229
#1: ffffc90003f9fd80 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x906/0x1ac0 kernel/workqueue.c:3230
#2: ffff888023d81190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:990 [inline]
#2: ffff888023d81190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1c1/0x4e20 drivers/usb/core/hub.c:5849
#3: ffff8880611e5190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:990 [inline]
#3: ffff8880611e5190 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7f/0x4b0 drivers/base/dd.c:1003
#4: ffff888061381160 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:990 [inline]
#4: ffff888061381160 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7f/0x4b0 drivers/base/dd.c:1003
2 locks held by syz-executor.0/14856:
1 lock held by syz-executor.0/14858:
#0: ffff88802c5ccac8 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xeb/0x180 fs/file.c:1191
1 lock held by syz-executor.3/15260:
#0: ffffffff8d7bc538 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:291 [inline]
#0: ffffffff8d7bc538 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x682/0x7a0 kernel/rcu/tree_exp.h:939
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.9.0-rc5-syzkaller-00007-g4d2008430ce8 #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+0x116/0x1f0 lib/dump_stack.c:114
nmi_cpu_backtrace+0x27b/0x390 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x29c/0x300 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+0xf86/0x1240 kernel/hung_task.c:380
kthread+0x2c1/0x3a0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 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 PID: 14856 Comm: syz-executor.0 Not tainted 6.9.0-rc5-syzkaller-00007-g4d2008430ce8 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:hlock_class+0x56/0x130 kernel/locking/lockdep.c:228
Code: 20 66 81 e3 ff 1f 0f b7 db be 08 00 00 00 48 89 d8 48 c1 e8 06 48 8d 3c c5 80 81 dd 93 e8 92 fd 7d 00 48 0f a3 1d 5a 8c 72 12 <73> 13 48 69 c3 c8 00 00 00 5b 48 05 a0 85 dd 93 c3 cc cc cc cc 48
RSP: 0018:ffffc90003b2e730 EFLAGS: 00000047
RAX: 0000000000000001 RBX: 0000000000000d23 RCX: ffffffff816af51e
RDX: fffffbfff27bb065 RSI: 0000000000000008 RDI: ffffffff93dd8320
RBP: ffffc90003b2e878 R08: 0000000000000000 R09: fffffbfff27bb064
R10: ffffffff93dd8327 R11: 0000000000000002 R12: ffff88801b3b8000
R13: 0000000000000080 R14: 0000000000000007 R15: 1ffff92000765cee
FS: 00007f8afbe9f6c0(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2ec2a000 CR3: 000000005d8c2000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
mark_lock+0xb5/0xc60 kernel/locking/lockdep.c:4656
mark_held_locks+0x9f/0xe0 kernel/locking/lockdep.c:4274
__trace_hardirqs_on_caller kernel/locking/lockdep.c:4300 [inline]
lockdep_hardirqs_on_prepare+0x27a/0x420 kernel/locking/lockdep.c:4359
trace_hardirqs_on+0x36/0x40 kernel/trace/trace_preemptirq.c:61
kasan_quarantine_put+0x10a/0x240 mm/kasan/quarantine.c:234
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+0x12e/0x380 mm/slub.c:4344
free_buffer_head+0x4e/0x110 fs/buffer.c:3017
try_to_free_buffers+0x1c5/0x2d0 fs/buffer.c:2958
filemap_release_folio+0x219/0x280 mm/filemap.c:4133
shrink_folio_list+0x295a/0x3f00 mm/vmscan.c:1376
evict_folios+0x6e6/0x1bb0 mm/vmscan.c:4537
try_to_shrink_lruvec+0x618/0x9b0 mm/vmscan.c:4733
lru_gen_shrink_lruvec mm/vmscan.c:4876 [inline]
shrink_lruvec+0x2df/0x29b0 mm/vmscan.c:5653
shrink_node_memcgs mm/vmscan.c:5873 [inline]
shrink_node+0x81e/0x3a80 mm/vmscan.c:5908
shrink_zones mm/vmscan.c:6152 [inline]
do_try_to_free_pages+0x361/0x1a20 mm/vmscan.c:6214
try_to_free_mem_cgroup_pages+0x317/0x7f0 mm/vmscan.c:6529
try_charge_memcg+0x3d1/0x11a0 mm/memcontrol.c:2783
obj_cgroup_charge_pages mm/memcontrol.c:3302 [inline]
obj_cgroup_charge+0x179/0x390 mm/memcontrol.c:3593
__memcg_slab_pre_alloc_hook mm/slub.c:1919 [inline]
memcg_slab_pre_alloc_hook mm/slub.c:1940 [inline]
slab_pre_alloc_hook mm/slub.c:3751 [inline]
slab_alloc_node mm/slub.c:3827 [inline]
kmem_cache_alloc+0x2ba/0x320 mm/slub.c:3852
kmem_cache_zalloc include/linux/slab.h:739 [inline]
alloc_buffer_head+0x21/0x160 fs/buffer.c:3001
folio_alloc_buffers+0x2c8/0x7d0 fs/buffer.c:924
create_empty_buffers+0x36/0x480 fs/buffer.c:1650
folio_create_buffers+0x109/0x150 fs/buffer.c:1761
block_read_full_folio+0x20a/0xa70 fs/buffer.c:2365
filemap_read_folio+0xe7/0x2c0 mm/filemap.c:2331
do_read_cache_folio+0x207/0x550 mm/filemap.c:3747
do_read_cache_page mm/filemap.c:3813 [inline]
read_cache_page+0x5b/0x160 mm/filemap.c:3822
read_mapping_page include/linux/pagemap.h:888 [inline]
dir_get_page fs/sysv/dir.c:64 [inline]
sysv_readdir+0x194/0x810 fs/sysv/dir.c:92
iterate_dir+0x292/0x9e0 fs/readdir.c:110
__do_sys_getdents fs/readdir.c:326 [inline]
__se_sys_getdents fs/readdir.c:311 [inline]
__x64_sys_getdents+0x14f/0x2d0 fs/readdir.c:311
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcf/0x260 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8afb07dea9
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:00007f8afbe9f0c8 EFLAGS: 00000246 ORIG_RAX: 000000000000004e
RAX: ffffffffffffffda RBX: 00007f8afb1abf80 RCX: 00007f8afb07dea9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004
RBP: 00007f8afb0ca4a4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f8afb1abf80 R15: 00007ffc9ed9bb28