INFO: task syz-executor.4:18540 blocked for more than 143 seconds. Not tainted 6.3.0-syzkaller-13027-g1a5304fecee5 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:24584 pid:18540 ppid:5029 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5343 [inline] __schedule+0x187b/0x4900 kernel/sched/core.c:6669 schedule+0xc3/0x180 kernel/sched/core.c:6745 io_schedule+0x8c/0x100 kernel/sched/core.c:8979 bit_wait_io+0x12/0xc0 kernel/sched/wait_bit.c:209 __wait_on_bit_lock+0xbd/0x1a0 kernel/sched/wait_bit.c:90 out_of_line_wait_on_bit_lock+0x1d4/0x250 kernel/sched/wait_bit.c:117 wait_on_bit_lock_io include/linux/wait_bit.h:208 [inline] __lock_buffer fs/buffer.c:70 [inline] lock_buffer include/linux/buffer_head.h:406 [inline] __sync_dirty_buffer+0x120/0x380 fs/buffer.c:2807 __ext4_handle_dirty_metadata+0x2a6/0x820 fs/ext4/ext4_jbd2.c:387 ext4_handle_dirty_dirblock+0x362/0x6f0 fs/ext4/namei.c:438 ext4_finish_convert_inline_dir+0x57b/0x6f0 fs/ext4/inline.c:1178 ext4_convert_inline_data_nolock+0xa01/0xd80 fs/ext4/inline.c:1255 ext4_try_add_inline_entry+0x809/0xb70 fs/ext4/inline.c:1328 ext4_add_entry+0x535/0x1010 fs/ext4/namei.c:2384 ext4_add_nondir+0x98/0x290 fs/ext4/namei.c:2771 ext4_create+0x376/0x550 fs/ext4/namei.c:2816 vfs_create+0x1e2/0x330 fs/namei.c:3194 do_mknodat+0x3c6/0x6e0 fs/namei.c:4043 __do_sys_mknodat fs/namei.c:4071 [inline] __se_sys_mknodat fs/namei.c:4068 [inline] __x64_sys_mknodat+0xa9/0xc0 fs/namei.c:4068 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: 0033:0x7f0381e8c169 RSP: 002b:00007f0382cb5168 EFLAGS: 00000246 ORIG_RAX: 0000000000000103 RAX: ffffffffffffffda RBX: 00007f0381fabf80 RCX: 00007f0381e8c169 RDX: 0000000000000000 RSI: 0000000020000340 RDI: 0000000000000004 RBP: 00007f0381ee7ca1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000708 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fffa305719f R14: 00007f0382cb5300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by rcu_tasks_kthre/13: #0: ffffffff8cf277f0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:518 1 lock held by rcu_tasks_trace/14: #0: ffffffff8cf27bb0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:518 1 lock held by khungtaskd/28: #0: ffffffff8cf27620 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 2 locks held by getty/4747: #0: ffff88814abbc098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc900015802f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6ab/0x1db0 drivers/tty/n_tty.c:2176 1 lock held by syz-executor.3/5031: #0: ffffffff8cf2ccf8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:293 [inline] #0: ffffffff8cf2ccf8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x3a3/0x890 kernel/rcu/tree_exp.h:992 5 locks held by kworker/u4:6/5133: #0: ffff8880b993c1d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:558 #1: ffffc9000488fd20 ((work_completion)(&(&bat_priv->nc.work)->work)){+.+.}-{0:0}, at: process_one_work+0x7c8/0x10e0 kernel/workqueue.c:2380 #2: ffffffff8cf27620 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x40 include/linux/rcupdate.h:326 #3: ffffffff91e28b58 (&obj_hash[i].lock){-.-.}-{2:2}, at: debug_object_activate+0x16a/0x8b0 lib/debugobjects.c:690 #4: ffff8880b99287c8 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_change+0xfd/0x280 kernel/sched/psi.c:920 2 locks held by kworker/1:30/9447: #0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x77e/0x10e0 kernel/workqueue.c:2378 #1: ffffc90016957d20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x7c8/0x10e0 kernel/workqueue.c:2380 3 locks held by syz-executor.4/18540: #0: ffff888020a8a460 (sb_writers#4){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:394 #1: ffff8880398c2c00 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:810 [inline] #1: ffff8880398c2c00 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: filename_create+0x260/0x530 fs/namei.c:3884 #2: ffff8880398c28c8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline] #2: ffff8880398c28c8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_try_add_inline_entry+0xf6/0xb70 fs/ext4/inline.c:1286 5 locks held by syz-executor.2/22644: 1 lock held by syz-executor.1/22661: #0: ffff88806af44980 (&iint->mutex){+.+.}-{3:3}, at: ima_check_last_writer security/integrity/ima/ima_main.c:165 [inline] #0: ffff88806af44980 (&iint->mutex){+.+.}-{3:3}, at: ima_file_free+0x110/0x3c0 security/integrity/ima/ima_main.c:199 2 locks held by syz-executor.1/22670: ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.3.0-syzkaller-13027-g1a5304fecee5 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023 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+0x2b8/0x350 kernel/kthread.c:379 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: 4993 Comm: kworker/0:3 Not tainted 6.3.0-syzkaller-13027-g1a5304fecee5 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023 Workqueue: wg-crypt-wg0 wg_packet_encrypt_worker RIP: 0010:__lock_acquire+0x90/0x2000 Code: c1 e8 03 80 3c 30 00 74 12 4c 89 f7 e8 b9 31 78 00 48 be 00 00 00 00 00 fc ff df 48 c7 c0 60 91 1e 90 49 39 06 75 03 45 31 e4 <89> 5c 24 58 83 fd 01 77 2e 89 e8 49 8d 5c c6 08 48 89 d8 48 c1 e8 RSP: 0018:ffffc90003c6fa18 EFLAGS: 00000083 RAX: ffffffff901e9160 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: dffffc0000000000 RDI: ffff88801f524538 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000001 R13: 0000000000000000 R14: ffff88801f524538 R15: ffff88802725d940 FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f3912b86058 CR3: 000000000cd30000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire+0x1e3/0x520 kernel/locking/lockdep.c:5691 process_one_work+0x7bf/0x10e0 kernel/workqueue.c:2380 worker_thread+0xa63/0x1210 kernel/workqueue.c:2552 kthread+0x2b8/0x350 kernel/kthread.c:379 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308