INFO: task syz.0.437:10007 blocked for more than 143 seconds.
Not tainted 6.16.0-rc1-syzkaller-00203-g4774cfe3543a #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.437 state:D stack:25160 pid:10007 tgid:10006 ppid:9372 task_flags:0x400140 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5396 [inline]
__schedule+0x16a2/0x4cb0 kernel/sched/core.c:6785
__schedule_loop kernel/sched/core.c:6863 [inline]
schedule+0x165/0x360 kernel/sched/core.c:6878
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6935
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0x724/0xe80 kernel/locking/mutex.c:747
open_dummy_log fs/jfs/jfs_logmgr.c:1191 [inline]
lmLogOpen+0x1a1/0xfb0 fs/jfs/jfs_logmgr.c:1066
jfs_mount_rw+0xe9/0x670 fs/jfs/jfs_mount.c:257
jfs_fill_super+0x754/0xd90 fs/jfs/super.c:532
get_tree_bdev_flags+0x40b/0x4d0 fs/super.c:1679
vfs_get_tree+0x92/0x2b0 fs/super.c:1802
do_new_mount+0x24a/0xa40 fs/namespace.c:3885
do_mount fs/namespace.c:4222 [inline]
__do_sys_mount fs/namespace.c:4433 [inline]
__se_sys_mount+0x317/0x410 fs/namespace.c:4410
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc613f900ca
RSP: 002b:00007fc614dc3e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fc614dc3ef0 RCX: 00007fc613f900ca
RDX: 0000200000000100 RSI: 0000200000000040 RDI: 00007fc614dc3eb0
RBP: 0000200000000100 R08: 00007fc614dc3ef0 R09: 0000000001010006
R10: 0000000001010006 R11: 0000000000000246 R12: 0000200000000040
R13: 00007fc614dc3eb0 R14: 0000000000006255 R15: 0000200000000140
Showing all locks held in the system:
1 lock held by ksoftirqd/1/23:
#0: ffff8880b873b798 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:606
1 lock held by khungtaskd/31:
#0: ffffffff8e13ed60 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#0: ffffffff8e13ed60 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#0: ffffffff8e13ed60 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6770
2 locks held by kworker/u8:6/3423:
2 locks held by getty/5584:
#0: ffff888034e8a0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc9000332b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 drivers/tty/n_tty.c:2222
2 locks held by syz-executor/8658:
#0: ffff888059da80e0 (&type->s_umount_key#80){++++}-{4:4}, at: __super_lock fs/super.c:57 [inline]
#0: ffff888059da80e0 (&type->s_umount_key#80){++++}-{4:4}, at: __super_lock_excl fs/super.c:72 [inline]
#0: ffff888059da80e0 (&type->s_umount_key#80){++++}-{4:4}, at: deactivate_super+0xa9/0xe0 fs/super.c:506
#1: ffffffff8e570c28 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb4/0x520 fs/jfs/jfs_logmgr.c:1444
2 locks held by syz-executor/8809:
#0: ffff888056b600e0 (&type->s_umount_key#80){++++}-{4:4}, at: __super_lock fs/super.c:57 [inline]
#0: ffff888056b600e0 (&type->s_umount_key#80){++++}-{4:4}, at: __super_lock_excl fs/super.c:72 [inline]
#0: ffff888056b600e0 (&type->s_umount_key#80){++++}-{4:4}, at: deactivate_super+0xa9/0xe0 fs/super.c:506
#1: ffffffff8e570c28 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb4/0x520 fs/jfs/jfs_logmgr.c:1444
2 locks held by syz-executor/9024:
#0: ffff88807d0980e0 (&type->s_umount_key#80){++++}-{4:4}, at: __super_lock fs/super.c:57 [inline]
#0: ffff88807d0980e0 (&type->s_umount_key#80){++++}-{4:4}, at: __super_lock_excl fs/super.c:72 [inline]
#0: ffff88807d0980e0 (&type->s_umount_key#80){++++}-{4:4}, at: deactivate_super+0xa9/0xe0 fs/super.c:506
#1: ffffffff8e570c28 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb4/0x520 fs/jfs/jfs_logmgr.c:1444
2 locks held by syz-executor/9126:
#0: ffff888065fd20e0 (&type->s_umount_key#80){++++}-{4:4}, at: __super_lock fs/super.c:57 [inline]
#0: ffff888065fd20e0 (&type->s_umount_key#80){++++}-{4:4}, at: __super_lock_excl fs/super.c:72 [inline]
#0: ffff888065fd20e0 (&type->s_umount_key#80){++++}-{4:4}, at: deactivate_super+0xa9/0xe0 fs/super.c:506
#1: ffffffff8e570c28 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb4/0x520 fs/jfs/jfs_logmgr.c:1444
2 locks held by syz.0.437/10007:
#0: ffff88805767e0e0 (&type->s_umount_key#78/1){+.+.}-{4:4}, at: alloc_super+0x204/0x970 fs/super.c:345
#1: ffffffff8e570c28 (jfs_log_mutex){+.+.}-{4:4}, at: open_dummy_log fs/jfs/jfs_logmgr.c:1191 [inline]
#1: ffffffff8e570c28 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogOpen+0x1a1/0xfb0 fs/jfs/jfs_logmgr.c:1066
2 locks held by syz-executor/10173:
#0: ffff8880419180e0 (&type->s_umount_key#80){++++}-{4:4}, at: __super_lock fs/super.c:57 [inline]
#0: ffff8880419180e0 (&type->s_umount_key#80){++++}-{4:4}, at: __super_lock_excl fs/super.c:72 [inline]
#0: ffff8880419180e0 (&type->s_umount_key#80){++++}-{4:4}, at: deactivate_super+0xa9/0xe0 fs/super.c:506
#1: ffffffff8e570c28 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb4/0x520 fs/jfs/jfs_logmgr.c:1444
1 lock held by syz.2.590/11265:
#0: ffff888056b600e0 (&type->s_umount_key#80){++++}-{4:4}, at: __super_lock fs/super.c:59 [inline]
#0: ffff888056b600e0 (&type->s_umount_key#80){++++}-{4:4}, at: super_lock+0x2a9/0x3b0 fs/super.c:121
1 lock held by syz.4.592/11285:
#0: ffff888065fd20e0 (&type->s_umount_key#80){++++}-{4:4}, at: __super_lock fs/super.c:59 [inline]
#0: ffff888065fd20e0 (&type->s_umount_key#80){++++}-{4:4}, at: super_lock+0x2a9/0x3b0 fs/super.c:121
1 lock held by syz-executor/11349:
#0: ffffffff8e144878 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:304 [inline]
#0: ffffffff8e144878 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x2f6/0x730 kernel/rcu/tree_exp.h:998
1 lock held by syz.0.609/11425:
#0: ffff888059da80e0 (&type->s_umount_key#80){++++}-{4:4}, at: __super_lock fs/super.c:59 [inline]
#0: ffff888059da80e0 (&type->s_umount_key#80){++++}-{4:4}, at: super_lock+0x2a9/0x3b0 fs/super.c:121
4 locks held by dhcpcd-run-hook/11822:
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-rc1-syzkaller-00203-g4774cfe3543a #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
nmi_cpu_backtrace+0x39e/0x3d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x17a/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:158 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:307 [inline]
watchdog+0xfee/0x1030 kernel/hung_task.c:470
kthread+0x70e/0x8a0 kernel/kthread.c:464
ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 13 Comm: kworker/u8:1 Not tainted 6.16.0-rc1-syzkaller-00203-g4774cfe3543a #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: writeback wb_workfn (flush-7:1)
RIP: 0010:check_kcov_mode kernel/kcov.c:185 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x31/0x70 kernel/kcov.c:217
Code: 24 65 48 8b 0c 25 08 a0 99 92 65 8b 15 d8 54 d9 10 81 e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 35 83 b9 3c 16 00 00 00 74 2c <8b> 91 18 16 00 00 83 fa 02 75 21 48 8b 91 20 16 00 00 48 8b 32 48
RSP: 0000:ffffc90000125f58 EFLAGS: 00000246
RAX: ffffffff8b5b7011 RBX: 0000000000000035 RCX: ffff88801d280000
RDX: 0000000000000000 RSI: 0000000000000002 RDI: ffffc90000125fe2
RBP: ffffc90000126080 R08: ffffc90000125ff7 R09: 0000000000000000
R10: ffffc90000125fe0 R11: fffff52000024bff R12: ffffc90000126363
R13: dffffc0000000000 R14: ffffc90000126364 R15: 0000000000000002
FS: 0000000000000000(0000) GS:ffff888125c86000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1495f509d0 CR3: 00000000317e6000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
number+0xc01/0xf60 lib/vsprintf.c:556
vsnprintf+0x91b/0xf00 lib/vsprintf.c:2838
sprintf+0xd9/0x120 lib/vsprintf.c:3037
print_time kernel/printk/printk.c:1381 [inline]
info_print_prefix+0x155/0x310 kernel/printk/printk.c:1407
record_print_text+0x154/0x430 kernel/printk/printk.c:1456
printk_get_next_message+0x26d/0x7b0 kernel/printk/printk.c:3024
console_emit_next_record kernel/printk/printk.c:3092 [inline]
console_flush_all+0x4ca/0xc40 kernel/printk/printk.c:3226
__console_flush_and_unlock kernel/printk/printk.c:3285 [inline]
console_unlock+0xc4/0x270 kernel/printk/printk.c:3325
vprintk_emit+0x5b7/0x7a0 kernel/printk/printk.c:2450
_printk+0xcf/0x120 kernel/printk/printk.c:2475
f2fs_printk+0x3d8/0x470 fs/f2fs/super.c:-1
f2fs_write_end_io+0x495/0x810 fs/f2fs/data.c:353
__submit_merged_bio+0x27a/0x6a0 fs/f2fs/data.c:543
__f2fs_submit_merged_write fs/f2fs/data.c:638 [inline]
__submit_merged_write_cond+0x255/0x530 fs/f2fs/data.c:660
f2fs_submit_merged_write_cond fs/f2fs/data.c:677 [inline]
f2fs_write_cache_pages fs/f2fs/data.c:3201 [inline]
__f2fs_write_data_pages fs/f2fs/data.c:3282 [inline]
f2fs_write_data_pages+0x261d/0x3000 fs/f2fs/data.c:3309
do_writepages+0x32b/0x550 mm/page-writeback.c:2636
__writeback_single_inode+0x145/0xff0 fs/fs-writeback.c:1680
writeback_sb_inodes+0x6b5/0x1000 fs/fs-writeback.c:1976
wb_writeback+0x43b/0xaf0 fs/fs-writeback.c:2156
wb_do_writeback fs/fs-writeback.c:2303 [inline]
wb_workfn+0x409/0xef0 fs/fs-writeback.c:2343
process_one_work kernel/workqueue.c:3238 [inline]
process_scheduled_works+0xade/0x17b0 kernel/workqueue.c:3321
worker_thread+0x8a0/0xda0 kernel/workqueue.c:3402
kthread+0x70e/0x8a0 kernel/kthread.c:464
ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245