INFO: task syz.5.162:7323 blocked for more than 143 seconds.
Not tainted 6.15.0-rc7-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.5.162 state:D stack:24360 pid:7323 tgid:7322 ppid:6006 task_flags:0x400040 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x168f/0x4c70 kernel/sched/core.c:6767
__schedule_loop kernel/sched/core.c:6845 [inline]
schedule+0x165/0x360 kernel/sched/core.c:6860
io_schedule+0x81/0xe0 kernel/sched/core.c:7742
TXN_SLEEP_DROP_LOCK fs/jfs/jfs_txnmgr.c:125 [inline]
txLockAlloc+0x15e/0x380 fs/jfs/jfs_txnmgr.c:190
txLinelock+0x2f/0x180 fs/jfs/jfs_txnmgr.c:1069
dtDeleteEntry+0x390/0x8e0 fs/jfs/jfs_dtree.c:4022
dtDelete+0xd51/0x2c60 fs/jfs/jfs_dtree.c:2195
jfs_unlink+0x29c/0xa20 fs/jfs/namei.c:502
vfs_unlink+0x394/0x650 fs/namei.c:4579
do_unlinkat+0x350/0x560 fs/namei.c:4643
__do_sys_unlink fs/namei.c:4689 [inline]
__se_sys_unlink fs/namei.c:4687 [inline]
__x64_sys_unlink+0x47/0x50 fs/namei.c:4687
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f311358e969
RSP: 002b:00007f311447a038 EFLAGS: 00000246 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 00007f31137b5fa0 RCX: 00007f311358e969
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000100
RBP: 00007f3113610ab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f31137b5fa0 R15: 00007fff1b04f928
Showing all locks held in the system:
2 locks held by kworker/u8:0/12:
3 locks held by kworker/u8:1/13:
#0: ffff8880b89399d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:605
#1: ffffc90000127c60 ((work_completion)(&(&bat_priv->nc.work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3214 [inline]
#1: ffffc90000127c60 ((work_completion)(&(&bat_priv->nc.work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ec/0x17a0 kernel/workqueue.c:3319
#2: ffff8880b88399d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:605
1 lock held by khungtaskd/31:
#0: ffffffff8df3dee0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#0: ffffffff8df3dee0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#0: ffffffff8df3dee0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6764
3 locks held by kworker/u9:0/55:
#0: ffff888027b7d948 ((wq_completion)hci6){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3213 [inline]
#0: ffff888027b7d948 ((wq_completion)hci6){+.+.}-{0:0}, at: process_scheduled_works+0x9b1/0x17a0 kernel/workqueue.c:3319
#1: ffffc9000100fc60 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3214 [inline]
#1: ffffc9000100fc60 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ec/0x17a0 kernel/workqueue.c:3319
#2: ffff888030a24d80 (&hdev->req_lock){+.+.}-{4:4}, at: hci_cmd_sync_work+0x1d4/0x3a0 net/bluetooth/hci_sync.c:331
4 locks held by kworker/u8:6/1327:
#0: ffff88814229c148 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3213 [inline]
#0: ffff88814229c148 ((wq_completion)writeback){+.+.}-{0:0}, at: process_scheduled_works+0x9b1/0x17a0 kernel/workqueue.c:3319
#1: ffffc90004587c60 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3214 [inline]
#1: ffffc90004587c60 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ec/0x17a0 kernel/workqueue.c:3319
#2: ffff8880671720e0 (&type->s_umount_key#62){++++}-{4:4}, at: super_trylock_shared+0x20/0xf0 fs/super.c:562
#3: ffff8880552f4250 (&jfs_ip->commit_mutex){+.+.}-{4:4}, at: jfs_commit_inode+0x1ca/0x530 fs/jfs/inode.c:102
2 locks held by getty/5581:
#0: ffff88814e1ab0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900033332f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 drivers/tty/n_tty.c:2222
1 lock held by syz-executor/5821:
#0: ffffffff8df439b8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:336 [inline]
#0: ffffffff8df439b8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x3b7/0x730 kernel/rcu/tree_exp.h:998
6 locks held by syz.5.162/7323:
#0: ffff88804ff08420 (sb_writers#18){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:556
#1: ffff888055150578 (&type->i_mutex_dir_key#13/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:902 [inline]
#1: ffff888055150578 (&type->i_mutex_dir_key#13/1){+.+.}-{4:4}, at: do_unlinkat+0x1bf/0x560 fs/namei.c:4630
#2: ffff88805dfdbcc8 (&sb->s_type->i_mutex_key#35){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:867 [inline]
#2: ffff88805dfdbcc8 (&sb->s_type->i_mutex_key#35){+.+.}-{4:4}, at: vfs_unlink+0xf2/0x650 fs/namei.c:4568
#3: ffff88805dfdb888 (&jfs_ip->rdwrlock#3){+.+.}-{4:4}, at: jfs_unlink+0x1d8/0xa20 fs/jfs/namei.c:488
#4: ffff8880551501c8 (&jfs_ip->commit_mutex){+.+.}-{4:4}, at: jfs_unlink+0x226/0xa20 fs/jfs/namei.c:492
#5: ffff88805dfdb918 (&jfs_ip->commit_mutex/1){+.+.}-{4:4}, at: jfs_unlink+0x23c/0xa20 fs/jfs/namei.c:493
2 locks held by syz.6.242/8272:
#0: ffff88804a924420 (sb_writers#18){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:556
#1: ffff888055153cc8 (&type->i_mutex_dir_key#22){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:867 [inline]
#1: ffff888055153cc8 (&type->i_mutex_dir_key#22){+.+.}-{4:4}, at: open_last_lookups fs/namei.c:3797 [inline]
#1: ffff888055153cc8 (&type->i_mutex_dir_key#22){+.+.}-{4:4}, at: path_openat+0x8da/0x3830 fs/namei.c:4036
2 locks held by syz.6.242/8307:
#0: ffff88804a924420 (sb_writers#18){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:556
#1: ffff888055153cc8 (&type->i_mutex_dir_key#13/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:902 [inline]
#1: ffff888055153cc8 (&type->i_mutex_dir_key#13/1){+.+.}-{4:4}, at: lock_rename fs/namei.c:3265 [inline]
#1: ffff888055153cc8 (&type->i_mutex_dir_key#13/1){+.+.}-{4:4}, at: do_renameat2+0x3dd/0xc50 fs/namei.c:5216
2 locks held by syz.6.242/8309:
#0: ffff88804a924420 (sb_writers#18){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:556
#1: ffff888055153cc8 (&type->i_mutex_dir_key#13/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:902 [inline]
#1: ffff888055153cc8 (&type->i_mutex_dir_key#13/1){+.+.}-{4:4}, at: filename_create+0x1f9/0x470 fs/namei.c:4132
2 locks held by syz-executor/8557:
#0: ffff88802eace0e0 (&type->s_umount_key#71){+.+.}-{4:4}, at: __super_lock fs/super.c:56 [inline]
#0: ffff88802eace0e0 (&type->s_umount_key#71){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff88802eace0e0 (&type->s_umount_key#71){+.+.}-{4:4}, at: deactivate_super+0xa9/0xe0 fs/super.c:505
#1: ffffffff8df43880 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x4c/0x570 kernel/rcu/tree.c:3774
3 locks held by syz.8.353/9351:
#0: ffff888046fd4420 (sb_writers#18){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:556
#1: ffff88805dfdb390 (&sb->s_type->i_mutex_key#35){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:867 [inline]
#1: ffff88805dfdb390 (&sb->s_type->i_mutex_key#35){+.+.}-{4:4}, at: do_truncate+0x186/0x220 fs/open.c:63
#2: ffff88805dfdaf50 (&jfs_ip->rdwrlock#3){+.+.}-{4:4}, at: jfs_truncate+0xb2/0x140 fs/jfs/inode.c:411
2 locks held by syz.8.353/9379:
#0: ffff888046fd4420 (sb_writers#18){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:556
#1: ffff8880552f0578 (&type->i_mutex_dir_key#13/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:902 [inline]
#1: ffff8880552f0578 (&type->i_mutex_dir_key#13/1){+.+.}-{4:4}, at: filename_create+0x1f9/0x470 fs/namei.c:4132
2 locks held by syz.8.353/9381:
#0: ffff888046fd4420 (sb_writers#18){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:556
#1: ffff8880552f0578 (&type->i_mutex_dir_key#22){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:867 [inline]
#1: ffff8880552f0578 (&type->i_mutex_dir_key#22){+.+.}-{4:4}, at: open_last_lookups fs/namei.c:3797 [inline]
#1: ffff8880552f0578 (&type->i_mutex_dir_key#22){+.+.}-{4:4}, at: path_openat+0x8da/0x3830 fs/namei.c:4036
3 locks held by syz.7.379/9556:
#0: ffff888067172420 (sb_writers#18){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3041 [inline]
#0: ffff888067172420 (sb_writers#18){.+.+}-{0:0}, at: vfs_writev+0x274/0x9a0 fs/read_write.c:1053
#1: ffff8880552f4600 (&sb->s_type->i_mutex_key#35){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:867 [inline]
#1: ffff8880552f4600 (&sb->s_type->i_mutex_key#35){+.+.}-{4:4}, at: generic_file_write_iter+0xe3/0x540 mm/filemap.c:4243
#2: ffff8880552f41c0 (&jfs_ip->rdwrlock#3){+.+.}-{4:4}, at: jfs_get_block+0x141/0xab0 fs/jfs/inode.c:213
5 locks held by dhcpcd-run-hook/10217:
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.15.0-rc7-syzkaller #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:274 [inline]
watchdog+0xfee/0x1030 kernel/hung_task.c:437
kthread+0x711/0x8a0 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: 10217 Comm: dhcpcd-run-hook Not tainted 6.15.0-rc7-syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:io_serial_out+0x7c/0xc0 drivers/tty/serial/8250/8250_port.c:416
Code: e7 88 fc 44 89 f9 d3 e5 49 83 c6 40 4c 89 f0 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 f7 e8 bc bb e8 fc 41 03 2e 89 d8 89 ea ee <5b> 41 5c 41 5e 41 5f 5d c3 cc cc cc cc cc 44 89 f9 80 e1 07 38 c1
RSP: 0018:ffffc9000b8eea10 EFLAGS: 00000002
RAX: 0000000000000033 RBX: 0000000000000033 RCX: 0000000000000000
RDX: 00000000000003f8 RSI: 0000000000000000 RDI: 0000000000000020
RBP: 00000000000003f8 R08: ffff888023dc8237 R09: 1ffff110047b9046
R10: dffffc0000000000 R11: ffffffff85370970 R12: dffffc0000000000
R13: ffffffff9981cc4d R14: ffffffff99b21a00 R15: 0000000000000000
FS: 00007f64deb20c80(0000) GS:ffff8881261f6000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f64ded75286 CR3: 0000000065100000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
serial_port_out include/linux/serial_core.h:796 [inline]
serial8250_console_putchar drivers/tty/serial/8250/8250_port.c:3306 [inline]
serial8250_console_fifo_write drivers/tty/serial/8250/8250_port.c:-1 [inline]
serial8250_console_write+0x140d/0x1ba0 drivers/tty/serial/8250/8250_port.c:3456
console_emit_next_record kernel/printk/printk.c:3138 [inline]
console_flush_all+0x728/0xc40 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
audit_log_lost+0x1a6/0x1e0 kernel/audit.c:375
audit_log_start+0x3f1/0x870 kernel/audit.c:-1
common_lsm_audit+0xba/0x2e0 security/lsm_audit.c:461
smack_log+0x394/0x3f0 security/smack/smack_access.c:391
smk_tskacc+0x2fc/0x370 security/smack/smack_access.c:255
smack_inode_permission+0x28f/0x320 security/smack/smack_lsm.c:1218
security_inode_permission+0xf8/0x310 security/security.c:2324
may_lookup fs/namei.c:1845 [inline]
link_path_walk+0x216/0xe50 fs/namei.c:2451
path_openat+0x28c/0x3830 fs/namei.c:4035
do_filp_open+0x1fa/0x410 fs/namei.c:4066
do_open_execat+0x135/0x450 fs/exec.c:893
open_exec+0x40/0x60 fs/exec.c:930
load_elf_binary+0x194e/0x27a0 fs/binfmt_elf.c:899
search_binary_handler fs/exec.c:1778 [inline]
exec_binprm fs/exec.c:1810 [inline]
bprm_execve+0x999/0x1440 fs/exec.c:1862
do_execveat_common+0x510/0x6a0 fs/exec.c:1968
do_execve fs/exec.c:2042 [inline]
__do_sys_execve fs/exec.c:2118 [inline]
__se_sys_execve fs/exec.c:2113 [inline]
__x64_sys_execve+0x94/0xb0 fs/exec.c:2113
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f64decbb107
Code: 0f 00 64 c7 00 07 00 00 00 b8 ff ff ff ff c9 c3 0f 1f 00 48 8b 05 a9 ee 0f 00 48 8b 10 e9 01 00 00 00 90 b8 3b 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d c1 ec 0f 00 f7 d8 64 89 01 48
RSP: 002b:00007ffd222db1d8 EFLAGS: 00000246 ORIG_RAX: 000000000000003b
RAX: ffffffffffffffda RBX: 0000555acc25f0c8 RCX: 00007f64decbb107
RDX: 0000555acc25f0e8 RSI: 0000555acc25f0c8 RDI: 0000555acc25f170
RBP: 0000555acc25f170 R08: 00007ffd222dfe44 R09: 0000000000000000
R10: 0000000000000008 R11: 0000000000000246 R12: 0000555acc25f0e8
R13: 00007f64dee80e8b R14: 0000555acc25f0e8 R15: 0000000000000000