INFO: task syz-executor.4:5256 blocked for more than 143 seconds.
Not tainted 6.4.0-rc1-syzkaller-00109-gcc3c44c9fda2 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:24696 pid:5256 ppid:5044 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5343 [inline]
__schedule+0x187b/0x4900 kernel/sched/core.c:6669
schedule+0xc3/0x180 kernel/sched/core.c:6745
io_schedule+0x8c/0x100 kernel/sched/core.c:8979
bit_wait_io+0x12/0xc0 kernel/sched/wait_bit.c:209
__wait_on_bit_lock+0xbd/0x1a0 kernel/sched/wait_bit.c:90
out_of_line_wait_on_bit_lock+0x1d4/0x250 kernel/sched/wait_bit.c:117
wait_on_bit_lock_io include/linux/wait_bit.h:208 [inline]
__lock_buffer fs/buffer.c:70 [inline]
lock_buffer include/linux/buffer_head.h:406 [inline]
__sync_dirty_buffer+0x120/0x380 fs/buffer.c:2807
__ext4_handle_dirty_metadata+0x2a6/0x820 fs/ext4/ext4_jbd2.c:387
ext4_handle_dirty_dirblock+0x362/0x6f0 fs/ext4/namei.c:438
ext4_finish_convert_inline_dir+0x57b/0x6f0 fs/ext4/inline.c:1178
ext4_convert_inline_data_nolock+0xa01/0xd80 fs/ext4/inline.c:1255
ext4_try_add_inline_entry+0x809/0xb70 fs/ext4/inline.c:1328
ext4_add_entry+0x535/0x1010 fs/ext4/namei.c:2384
ext4_mkdir+0x553/0xce0 fs/ext4/namei.c:3006
vfs_mkdir+0x29d/0x450 fs/namei.c:4115
do_mkdirat+0x264/0x520 fs/namei.c:4138
__do_sys_mkdirat fs/namei.c:4153 [inline]
__se_sys_mkdirat fs/namei.c:4151 [inline]
__x64_sys_mkdirat+0x89/0xa0 fs/namei.c:4151
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f8d46e8c169
RSP: 002b:00007f8d47c6f168 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007f8d46fac120 RCX: 00007f8d46e8c169
RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000006
RBP: 00007f8d46ee7ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffec5e6f89f R14: 00007f8d47c6f300 R15: 0000000000022000
Showing all locks held in the system:
3 locks held by kworker/u4:1/12:
#0: ffff888012acd938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x77e/0x10e0 kernel/workqueue.c:2378
#1: ffffc90000117d20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x7c8/0x10e0 kernel/workqueue.c:2380
#2: ffff8880142760e0 (&type->s_umount_key#41){.+.+}-{3:3}, at: trylock_super+0x1f/0xf0 fs/super.c:414
1 lock held by rcu_tasks_kthre/13:
#0: ffffffff8cf27670 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:518
1 lock held by rcu_tasks_trace/14:
#0: ffffffff8cf27a30 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:518
5 locks held by kworker/u4:2/27:
1 lock held by khungtaskd/29:
#0: ffffffff8cf274a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by getty/4749:
#0: ffff888028c13098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900015b02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6ab/0x1db0 drivers/tty/n_tty.c:2176
3 locks held by syz-executor.4/5256:
#0: ffff8880337bc460 (sb_writers#4){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:394
#1: ffff8880367fa200 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:810 [inline]
#1: ffff8880367fa200 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: filename_create+0x260/0x530 fs/namei.c:3884
#2: ffff8880367f9ec8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline]
#2: ffff8880367f9ec8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_try_add_inline_entry+0xf6/0xb70 fs/ext4/inline.c:1286
1 lock held by syz-executor.4/5401:
#0: ffff88801f47d4c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x145/0xa30 block/bdev.c:747
1 lock held by syz-executor.2/5535:
#0: ffff88801f47d4c8 (&disk->open_mutex){+.+.}-{3:3}, at: sync_bdevs+0x1a9/0x320 block/bdev.c:986
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.4.0-rc1-syzkaller-00109-gcc3c44c9fda2 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023
Call Trace:
__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+0x187/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
watchdog+0xec2/0xf00 kernel/hung_task.c:379
kthread+0x2b8/0x350 kernel/kthread.c:379
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 1026 Comm: kworker/u4:5 Not tainted 6.4.0-rc1-syzkaller-00109-gcc3c44c9fda2 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023
Workqueue: bat_events batadv_nc_worker
RIP: 0010:check_wait_context kernel/locking/lockdep.c:4769 [inline]
RIP: 0010:__lock_acquire+0x83d/0x2000 kernel/locking/lockdep.c:5024
Code: 84 c0 0f 85 c3 00 00 00 8b 03 41 38 c7 41 0f b6 cf 41 89 c7 44 0f 42 f9 84 c0 44 0f 44 f9 49 ff c6 48 8b 44 24 40 0f b6 04 10 <84> c0 0f 85 bd 00 00 00 48 8b 04 24 48 63 00 48 83 c5 28 49 83 c4
RSP: 0018:ffffc9000545f998 EFLAGS: 00000002
RAX: 0000000000000000 RBX: ffffffff9006ee18 RCX: 0000000000000004
RDX: dffffc0000000000 RSI: 0000000000000008 RDI: ffffffff90327338
RBP: ffff8880210028d0 R08: dffffc0000000000 R09: fffffbfff2064e68
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8880210028d0
R13: 0000000000000001 R14: 0000000000000002 R15: 0000000000000004
FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c000aff000 CR3: 0000000022093000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_acquire+0x1e3/0x520 kernel/locking/lockdep.c:5691
rcu_lock_acquire+0x2e/0x40 include/linux/rcupdate.h:327
rcu_read_lock include/linux/rcupdate.h:773 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:408 [inline]
batadv_nc_worker+0xc5/0x5c0 net/batman-adv/network-coding.c:719
process_one_work+0x8a0/0x10e0 kernel/workqueue.c:2405
worker_thread+0xa63/0x1210 kernel/workqueue.c:2552
kthread+0x2b8/0x350 kernel/kthread.c:379
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308