INFO: task syz-executor.5:9552 blocked for more than 143 seconds.
Not tainted 6.3.0-rc4-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.5 state:D stack:27696 pid:9552 ppid:5102 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5307 [inline]
__schedule+0x173b/0x4630 kernel/sched/core.c:6625
schedule+0xc3/0x180 kernel/sched/core.c:6701
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6760
__mutex_lock_common+0xe33/0x2530 kernel/locking/mutex.c:679
__mutex_lock kernel/locking/mutex.c:747 [inline]
mutex_lock_nested+0x1b/0x20 kernel/locking/mutex.c:799
exfat_iterate+0x171/0x3370 fs/exfat/dir.c:232
iterate_dir+0x228/0x570
__do_sys_getdents fs/readdir.c:286 [inline]
__se_sys_getdents+0x1ef/0x4c0 fs/readdir.c:271
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: 0033:0x7f579168c0f9
RSP: 002b:00007f57923ec168 EFLAGS: 00000246 ORIG_RAX: 000000000000004e
RAX: ffffffffffffffda RBX: 00007f57917ac050 RCX: 00007f579168c0f9
RDX: 0000000000000018 RSI: 0000000000000000 RDI: 0000000000000005
RBP: 00007f57916e7b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd439829bf R14: 00007f57923ec300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8cf255b0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:510
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8cf25db0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:510
1 lock held by khungtaskd/28:
#0: ffffffff8cf253e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by getty/4746:
#0: ffff888028ae6098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:244
#1: ffffc900015c02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6ab/0x1db0 drivers/tty/n_tty.c:2177
3 locks held by syz-executor.1/9231:
3 locks held by syz-executor.5/9546:
3 locks held by syz-executor.5/9552:
#0: ffff88807a572868 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x254/0x2f0 fs/file.c:1047
#1: ffff88803ea936b0 (&sb->s_type->i_mutex_key#23){++++}-{3:3}, at: iterate_dir+0x135/0x570 fs/readdir.c:57
#2: ffff888145bf40e0 (&sbi->s_lock){+.+.}-{3:3}, at: exfat_iterate+0x171/0x3370 fs/exfat/dir.c:232
2 locks held by syz-executor.5/11652:
#0: ffff8880320f80e0 (&type->s_umount_key#56){++++}-{3:3}, at: iterate_supers+0xb0/0x1e0 fs/super.c:743
#1: ffff88807ac160e0 (&sbi->s_lock){+.+.}-{3:3}, at: exfat_sync_fs+0x6b/0x100 fs/exfat/super.c:65
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.3.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
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+0x270/0x300 kernel/kthread.c:376
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: 56 Comm: kworker/u4:4 Not tainted 6.3.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
Workqueue: bat_events batadv_nc_worker
RIP: 0010:mark_held_locks kernel/locking/lockdep.c:4229 [inline]
RIP: 0010:__trace_hardirqs_on_caller kernel/locking/lockdep.c:4263 [inline]
RIP: 0010:lockdep_hardirqs_on_prepare+0x391/0x7a0 kernel/locking/lockdep.c:4322
Code: 49 83 fd 31 0f 83 a1 00 00 00 4c 89 e0 48 c1 e8 03 0f b6 04 10 84 c0 75 50 8b 43 20 a9 00 00 04 00 74 28 31 d2 a9 00 00 03 00 <0f> 94 c2 83 f2 07 48 8b 7c 24 10 48 89 de e8 ec a0 00 00 48 ba 00
RSP: 0018:ffffc90001577ac0 EFLAGS: 00000046
RAX: 00000000000406cb RBX: ffff888018b38a60 RCX: ffffffff816a6b6a
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff902e3298
RBP: ffffc90001577b68 R08: dffffc0000000000 R09: fffffbfff205c654
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff888018b38a80
R13: 0000000000000001 R14: ffff888018b38a30 R15: 1ffff11003167146
FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc6b0459990 CR3: 000000000cd30000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
trace_hardirqs_on+0x28/0x40 kernel/trace/trace_preemptirq.c:61
queue_delayed_work_on+0x175/0x260 kernel/workqueue.c:1712
process_one_work+0x8a0/0x10e0 kernel/workqueue.c:2390
worker_thread+0xa63/0x1210 kernel/workqueue.c:2537
kthread+0x270/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308