INFO: task syz-executor.2:14846 blocked for more than 143 seconds.
Not tainted 6.8.0-rc1-syzkaller-00385-g4854cf9c61d0 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:27440 pid:14846 tgid:14844 ppid:5084 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5400 [inline]
__schedule+0x177f/0x4960 kernel/sched/core.c:6727
__schedule_loop kernel/sched/core.c:6802 [inline]
schedule+0x149/0x260 kernel/sched/core.c:6817
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6874
rwsem_down_write_slowpath+0xeea/0x13b0 kernel/locking/rwsem.c:1178
__down_write_common+0x1aa/0x200 kernel/locking/rwsem.c:1306
__super_lock fs/super.c:56 [inline]
super_lock+0x196/0x400 fs/super.c:120
super_lock_excl fs/super.c:145 [inline]
grab_super+0xaf/0x370 fs/super.c:534
sget_fc+0x1fa/0x770 fs/super.c:793
vfs_get_super fs/super.c:1268 [inline]
get_tree_single+0x2f/0x140 fs/super.c:1300
vfs_get_tree+0x8c/0x2a0 fs/super.c:1784
vfs_cmd_create+0xe4/0x230 fs/fsopen.c:230
__do_sys_fsconfig fs/fsopen.c:476 [inline]
__se_sys_fsconfig+0x967/0xec0 fs/fsopen.c:349
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf5/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7fb91bc7cda9
RSP: 002b:00007fb91c9120c8 EFLAGS: 00000246 ORIG_RAX: 00000000000001af
RAX: ffffffffffffffda RBX: 00007fb91bdabf80 RCX: 00007fb91bc7cda9
RDX: 0000000000000000 RSI: 0000000000000006 RDI: 0000000000000003
RBP: 00007fb91bcc947a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fb91bdabf80 R15: 00007fff6e078c68
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffffffff8d92f120 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
#0: ffffffff8d92f120 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline]
#0: ffffffff8d92f120 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614
2 locks held by getty/4806:
#0: ffff888029a6e0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b4/0x1e10 drivers/tty/n_tty.c:2201
3 locks held by syz-executor.1/14545:
2 locks held by syz-executor.2/14846:
#0: ffff88806ec0d870 (&fc->uapi_mutex){+.+.}-{3:3}, at: __do_sys_fsconfig fs/fsopen.c:474 [inline]
#0: ffff88806ec0d870 (&fc->uapi_mutex){+.+.}-{3:3}, at: __se_sys_fsconfig+0x8e6/0xec0 fs/fsopen.c:349
#1: ffff88806e48a0e0 (&type->s_umount_key#116){++++}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#1: ffff88806e48a0e0 (&type->s_umount_key#116){++++}-{3:3}, at: super_lock+0x196/0x400 fs/super.c:120
2 locks held by syz-executor.1/15015:
#0: ffff88802d1f7870 (&fc->uapi_mutex){+.+.}-{3:3}, at: __do_sys_fsconfig fs/fsopen.c:474 [inline]
#0: ffff88802d1f7870 (&fc->uapi_mutex){+.+.}-{3:3}, at: __se_sys_fsconfig+0x8e6/0xec0 fs/fsopen.c:349
#1: ffff88806e48a0e0 (&type->s_umount_key#116){++++}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#1: ffff88806e48a0e0 (&type->s_umount_key#116){++++}-{3:3}, at: super_lock+0x196/0x400 fs/super.c:120
1 lock held by syz-executor.3/17324:
#0: ffff88806e48a0e0 (&type->s_umount_key#116){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff88806e48a0e0 (&type->s_umount_key#116){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.8.0-rc1-syzkaller-00385-g4854cf9c61d0 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
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+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
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 11050 Comm: kworker/u4:12 Not tainted 6.8.0-rc1-syzkaller-00385-g4854cf9c61d0 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
Workqueue: bat_events batadv_nc_worker
RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:26 [inline]
RIP: 0010:preempt_count_add+0x36/0x190 kernel/sched/core.c:5857
Code: c7 c0 80 33 5f 92 48 c1 e8 03 49 bf 00 00 00 00 00 fc ff df 42 0f b6 04 38 84 c0 0f 85 e8 00 00 00 83 3d cc 2b fe 10 00 75 07 <65> 8b 05 0b b7 a2 7e 65 01 1d 04 b7 a2 7e 48 c7 c0 80 33 5f 92 48
RSP: 0018:ffffc9000a5d7b40 EFLAGS: 00000046
RAX: 0000000000000004 RBX: 0000000000000001 RCX: ffffffff925f3303
RDX: 0000000000000000 RSI: ffffffff8bbe9300 RDI: 0000000000000001
RBP: ffffc9000a5d7bf0 R08: ffffffff8f0244ef R09: 1ffffffff1e0489d
R10: dffffc0000000000 R11: fffffbfff1e0489e R12: ffff888013099000
R13: 1ffff920014baf6c R14: ffffc9000a5d7b80 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055f9f7b45110 CR3: 000000000d732000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__raw_spin_lock_irq include/linux/spinlock_api_smp.h:118 [inline]
_raw_spin_lock_irq+0xb7/0x120 kernel/locking/spinlock.c:170
process_one_work kernel/workqueue.c:2662 [inline]
process_scheduled_works+0xacb/0x1420 kernel/workqueue.c:2706
worker_thread+0xa5f/0x1000 kernel/workqueue.c:2787
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