INFO: task syz.0.276:6990 blocked for more than 143 seconds.
Not tainted 6.14.0-next-20250328-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.276 state:D stack:23256 pid:6990 tgid:6989 ppid:5838 task_flags:0x400140 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x1b88/0x5240 kernel/sched/core.c:6767
__schedule_loop kernel/sched/core.c:6845 [inline]
schedule+0x163/0x360 kernel/sched/core.c:6860
xfs_ail_push_all_sync+0x236/0x310 fs/xfs/xfs_trans_ail.c:721
xfs_log_quiesce+0xdf/0x5b0 fs/xfs/xfs_log.c:1019
xfs_log_clean+0xa6/0xc50 fs/xfs/xfs_log.c:1031
xfs_remount_ro fs/xfs/xfs_super.c:2080 [inline]
xfs_fs_reconfigure+0x7f5/0x990 fs/xfs/xfs_super.c:2138
reconfigure_super+0x43a/0x870 fs/super.c:1083
vfs_cmd_reconfigure fs/fsopen.c:262 [inline]
vfs_fsconfig_locked fs/fsopen.c:291 [inline]
__do_sys_fsconfig fs/fsopen.c:467 [inline]
__se_sys_fsconfig+0xb5e/0xf40 fs/fsopen.c:344
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f01e6f8d169
RSP: 002b:00007f01e4df6038 EFLAGS: 00000246 ORIG_RAX: 00000000000001af
RAX: ffffffffffffffda RBX: 00007f01e71a5fa0 RCX: 00007f01e6f8d169
RDX: 0000000000000000 RSI: 0000000000000007 RDI: 0000000000000004
RBP: 00007f01e700e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f01e71a5fa0 R15: 00007ffc6ba0b898
Showing all locks held in the system:
2 locks held by kworker/u8:1/13:
1 lock held by khungtaskd/31:
#0: ffffffff8ed3df80 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#0: ffffffff8ed3df80 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#0: ffffffff8ed3df80 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x30/0x180 kernel/locking/lockdep.c:6764
2 locks held by getty/5596:
#0: ffff88803149c0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc9000332e2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x5bb/0x1700 drivers/tty/n_tty.c:2222
1 lock held by syz-executor/5836:
#0: ffff888027cfa0e0 (&type->s_umount_key#31){++++}-{4:4}, at: __super_lock fs/super.c:56 [inline]
#0: ffff888027cfa0e0 (&type->s_umount_key#31){++++}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff888027cfa0e0 (&type->s_umount_key#31){++++}-{4:4}, at: deactivate_super+0xb5/0xf0 fs/super.c:505
5 locks held by kworker/u8:18/6447:
#0: ffff8880b8739b18 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:605
#1: ffff8880b8723b08 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x41f/0x7a0 kernel/sched/psi.c:987
#2: ffff8880b8725558 (&base->lock){-.-.}-{2:2}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#2: ffff8880b8725558 (&base->lock){-.-.}-{2:2}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#2: ffff8880b8725558 (&base->lock){-.-.}-{2:2}, at: batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:408 [inline]
#2: ffff8880b8725558 (&base->lock){-.-.}-{2:2}, at: batadv_nc_worker+0xcb/0x610 net/batman-adv/network-coding.c:719
#3: ffff8880b8723b08 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x41f/0x7a0 kernel/sched/psi.c:987
#4: ffff8880b8723b08 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_change+0xed/0x270 kernel/sched/psi.c:912
2 locks held by syz.0.276/6990:
#0: ffff88803422c870 (&fc->uapi_mutex){+.+.}-{4:4}, at: __do_sys_fsconfig fs/fsopen.c:465 [inline]
#0: ffff88803422c870 (&fc->uapi_mutex){+.+.}-{4:4}, at: __se_sys_fsconfig+0x9a3/0xf40 fs/fsopen.c:344
#1: ffff88802a81c0e0 (&type->s_umount_key#67){++++}-{4:4}, at: vfs_cmd_reconfigure fs/fsopen.c:261 [inline]
#1: ffff88802a81c0e0 (&type->s_umount_key#67){++++}-{4:4}, at: vfs_fsconfig_locked fs/fsopen.c:291 [inline]
#1: ffff88802a81c0e0 (&type->s_umount_key#67){++++}-{4:4}, at: __do_sys_fsconfig fs/fsopen.c:467 [inline]
#1: ffff88802a81c0e0 (&type->s_umount_key#67){++++}-{4:4}, at: __se_sys_fsconfig+0xb54/0xf40 fs/fsopen.c:344
2 locks held by syz-executor/7128:
#0: ffffffff8f47f328 (bio_slab_lock){+.+.}-{4:4}, at: bio_put_slab block/bio.c:140 [inline]
#0: ffffffff8f47f328 (bio_slab_lock){+.+.}-{4:4}, at: bioset_exit+0x42d/0x650 block/bio.c:1664
#1: ffffffff8ed43380 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x4c/0x530 kernel/rcu/tree.c:3774
2 locks held by syz.1.619/8798:
#0: ffff8880655f40e0 (&type->s_umount_key#56/1){+.+.}-{4:4}, at: alloc_super+0x221/0x9d0 fs/super.c:344
#1: ffffffff8ed3df80 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#1: ffffffff8ed3df80 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#1: ffffffff8ed3df80 (rcu_read_lock){....}-{1:3}, at: blk_mq_flush_plug_list+0x68d/0x1880 block/blk-mq.c:2910
2 locks held by syz.4.622/8817:
1 lock held by cmp/8823:
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.14.0-next-20250328-syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
nmi_cpu_backtrace+0x4ab/0x4e0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:158 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:274 [inline]
watchdog+0x133e/0x1380 kernel/hung_task.c:437
kthread+0x7b7/0x940 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 13 Comm: kworker/u8:1 Not tainted 6.14.0-next-20250328-syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue: events_unbound nsim_dev_trap_report_work
RIP: 0010:check_kcov_mode kernel/kcov.c:194 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x37/0x70 kernel/kcov.c:217
Code: 08 70 66 93 65 8b 15 48 1f a3 11 81 e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 35 83 b9 44 16 00 00 00 74 2c 8b 91 20 16 00 00 <83> fa 02 75 21 48 8b 91 28 16 00 00 48 8b 32 48 8d 7e 01 8b 89 24
RSP: 0018:ffffc900001279d8 EFLAGS: 00000046
RAX: ffffffff818a2dda RBX: ffff88807e68e000 RCX: ffff88801ceb0000
RDX: 0000000000000000 RSI: ffff88801b089000 RDI: 0000000000000008
RBP: ffff88807e68e008 R08: ffffffff818a2b1f R09: 0000000000000000
R10: ffffc90000127a60 R11: fffff52000024f4d R12: 000000000000000a
R13: dffffc0000000000 R14: 0000000000000008 R15: ffff88801b089000
FS: 0000000000000000(0000) GS:ffff8881250b9000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055e0fd4e5950 CR3: 0000000054464000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__queue_delayed_work+0xba/0x300 kernel/workqueue.c:2500
queue_delayed_work_on+0x1cc/0x390 kernel/workqueue.c:2561
process_one_work kernel/workqueue.c:3238 [inline]
process_scheduled_works+0xac3/0x18e0 kernel/workqueue.c:3319
worker_thread+0x870/0xd50 kernel/workqueue.c:3400
kthread+0x7b7/0x940 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245