INFO: task syz-executor.2:30731 blocked for more than 143 seconds.
Not tainted 6.7.0-rc6-syzkaller-00078-ga4aebe936554 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:22232 pid:30731 tgid:30730 ppid:5089 flags:0x00004006
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5376 [inline]
__schedule+0x1961/0x4ab0 kernel/sched/core.c:6688
__schedule_loop kernel/sched/core.c:6763 [inline]
schedule+0x149/0x260 kernel/sched/core.c:6778
io_schedule+0x8c/0x100 kernel/sched/core.c:8998
folio_wait_bit_common+0x881/0x12b0 mm/filemap.c:1273
folio_wait_writeback+0xe7/0x1e0 mm/page-writeback.c:3065
__filemap_fdatawait_range+0x17b/0x400 mm/filemap.c:522
filemap_write_and_wait_range+0x220/0x2c0 mm/filemap.c:684
direct_write_fallback+0xae/0x150 fs/libfs.c:1954
generic_file_write_iter+0xaf/0x310 mm/filemap.c:4039
call_write_iter include/linux/fs.h:2020 [inline]
new_sync_write fs/read_write.c:491 [inline]
vfs_write+0x792/0xb20 fs/read_write.c:584
ksys_write+0x1a0/0x2c0 fs/read_write.c:637
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x45/0x110 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f1542c7cce9
RSP: 002b:00007f1543a970c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f1542d9bf80 RCX: 00007f1542c7cce9
RDX: 0000000002007ffb RSI: 0000000020000040 RDI: 0000000000000005
RBP: 00007f1542cc947a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f1542d9bf80 R15: 00007ffe44574558
</TASK>
Showing all locks held in the system:
1 lock held by pool_workqueue_/3:
#0: ffffffff8d9334b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:293 [inline]
#0: ffffffff8d9334b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x3a3/0x890 kernel/rcu/tree_exp.h:996
1 lock held by khungtaskd/29:
#0: ffffffff8d92dae0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:301 [inline]
#0: ffffffff8d92dae0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:747 [inline]
#0: ffffffff8d92dae0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614
2 locks held by udevd/4511:
2 locks held by getty/4809:
#0: ffff888026aac0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900015a72f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b4/0x1e10 drivers/tty/n_tty.c:2201
1 lock held by syz-executor.5/5102:
#0: ffffffff8d9334b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:325 [inline]
#0: ffffffff8d9334b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x46c/0x890 kernel/rcu/tree_exp.h:996
1 lock held by syz-executor.4/5107:
3 locks held by syz-executor.2/30731:
#0: ffff88802679f9c8 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x2b0/0x340 fs/file.c:1177
#1: ffff888031e54418 (sb_writers#27){.+.+}-{0:0}, at: vfs_write+0x223/0xb20 fs/read_write.c:580
#2: ffff88803aea02a8 (&sb->s_type->i_mutex_key#35){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:802 [inline]
#2: ffff88803aea02a8 (&sb->s_type->i_mutex_key#35){+.+.}-{3:3}, at: generic_file_write_iter+0x83/0x310 mm/filemap.c:4036
2 locks held by kworker/1:2/30874:
#0: ffff888012c72938 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2602 [inline]
#0: ffff888012c72938 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2700
#1: ffffc9001688fd20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2602 [inline]
#1: ffffc9001688fd20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2700
2 locks held by syz-executor.0/847:
3 locks held by syz-executor.3/856:
1 lock held by dhcpcd/867:
#0: ffff888035dec130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1720 [inline]
#0: ffff888035dec130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x32/0xcb0 net/packet/af_packet.c:3208
6 locks held by syz-executor.4/876:
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.7.0-rc6-syzkaller-00078-ga4aebe936554 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x498/0x4d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x198/0x310 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
watchdog+0xfaf/0xff0 kernel/hung_task.c:379
kthread+0x2d3/0x370 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
</TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 24874 Comm: kworker/0:1 Not tainted 6.7.0-rc6-syzkaller-00078-ga4aebe936554 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
Workqueue: events kfree_rcu_monitor
RIP: 0010:get_current arch/x86/include/asm/current.h:41 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:235 [inline]
RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x8/0x90 kernel/kcov.c:304
Code: 00 00 00 48 89 44 0a 10 48 89 74 0a 18 4c 89 44 0a 20 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 f3 0f 1e fa 4c 8b 04 24 <65> 48 8b 15 e0 4a 75 7e 65 8b 05 e1 4a 75 7e a9 00 01 ff 00 74 10
RSP: 0018:ffffc9000481f4c0 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffc9000481f5d8 RCX: ffff88802a8a3b80
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc9000481f5a0 R08: ffffffff813daec1 R09: ffffc9000481f690
R10: 0000000000000003 R11: ffff88802a8a3b80 R12: ffff88802a8a3b80
R13: dffffc0000000000 R14: 0000000000000001 R15: ffffffff81ea3f5f
FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa970a2fd58 CR3: 000000002db18000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<NMI>
</NMI>
<TASK>
unwind_done arch/x86/include/asm/unwind.h:50 [inline]
unwind_next_frame+0xa1/0x29e0 arch/x86/kernel/unwind_orc.c:475
arch_stack_walk+0x146/0x1a0 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x117/0x1c0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:45 [inline]
kasan_set_track+0x4f/0x70 mm/kasan/common.c:52
kasan_save_free_info+0x28/0x40 mm/kasan/generic.c:522
____kasan_slab_free+0xd6/0x120 mm/kasan/common.c:236
kasan_slab_free include/linux/kasan.h:164 [inline]
slab_free_hook mm/slub.c:1800 [inline]
slab_free_freelist_hook mm/slub.c:1826 [inline]
slab_free mm/slub.c:3809 [inline]
kmem_cache_free_bulk+0x4e9/0x6c0 mm/slub.c:3927
kfree_bulk include/linux/slab.h:517 [inline]
kvfree_rcu_bulk+0x242/0x4b0 kernel/rcu/tree.c:2990
kvfree_rcu_drain_ready kernel/rcu/tree.c:3164 [inline]
kfree_rcu_monitor+0x8a4/0x1020 kernel/rcu/tree.c:3182
process_one_work kernel/workqueue.c:2627 [inline]
process_scheduled_works+0x90f/0x1420 kernel/workqueue.c:2700
worker_thread+0xa5f/0x1000 kernel/workqueue.c:2781
kthread+0x2d3/0x370 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
</TASK>