syzbot

INFO: task syz-executor312:5066 blocked for more than 143 seconds.
      Not tainted 6.2.0-rc5-syzkaller-00047-g7c46948a6e9c #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor312 state:D stack:25648 pid:5066  ppid:5065   flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5293 [inline]
 __schedule+0xb8a/0x5450 kernel/sched/core.c:6606
 schedule+0xde/0x1b0 kernel/sched/core.c:6682
 io_schedule+0xbe/0x130 kernel/sched/core.c:8868
 bit_wait_io+0x16/0xe0 kernel/sched/wait_bit.c:209
 __wait_on_bit_lock+0x11f/0x1a0 kernel/sched/wait_bit.c:90
 out_of_line_wait_on_bit_lock+0xd9/0x110 kernel/sched/wait_bit.c:117
 wait_on_bit_lock_io include/linux/wait_bit.h:208 [inline]
 __lock_buffer fs/buffer.c:69 [inline]
 lock_buffer include/linux/buffer_head.h:397 [inline]
 __sync_dirty_buffer+0x30e/0x380 fs/buffer.c:2732
 __ext4_handle_dirty_metadata+0x2b7/0x6f0 fs/ext4/ext4_jbd2.c:387
 ext4_handle_dirty_dirblock+0x371/0x470 fs/ext4/namei.c:438
 ext4_finish_convert_inline_dir fs/ext4/inline.c:1181 [inline]
 ext4_convert_inline_data_nolock+0xac1/0xf10 fs/ext4/inline.c:1258
 ext4_try_add_inline_entry+0x473/0x8d0 fs/ext4/inline.c:1331
 ext4_add_entry+0x80d/0xe30 fs/ext4/namei.c:2385
 ext4_rename+0x1979/0x2620 fs/ext4/namei.c:3904
 ext4_rename2+0x1c7/0x270 fs/ext4/namei.c:4184
 vfs_rename+0x1162/0x1a90 fs/namei.c:4779
 do_renameat2+0xb22/0xc30 fs/namei.c:4930
 __do_sys_renameat2 fs/namei.c:4963 [inline]
 __se_sys_renameat2 fs/namei.c:4960 [inline]
 __x64_sys_renameat2+0xe8/0x120 fs/namei.c:4960
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f32194fe5e9
RSP: 002b:00007ffcc332ecf8 EFLAGS: 00000246 ORIG_RAX: 000000000000013c
RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 00007f32194fe5e9
RDX: 0000000000000005 RSI: 00000000200001c0 RDI: 0000000000000005
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000001
R10: 0000000020000200 R11: 0000000000000246 R12: 00007ffcc332ed20
R13: 0000000000000000 R14: 431bde82d7b634db R15: 0000000000000000
 </TASK>

Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
 #0: ffffffff8c790fb0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xc70 kernel/rcu/tasks.h:507
1 lock held by rcu_tasks_trace/13:
 #0: ffffffff8c790cb0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xc70 kernel/rcu/tasks.h:507
1 lock held by khungtaskd/28:
 #0: ffffffff8c791b00 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x57/0x264 kernel/locking/lockdep.c:6494
4 locks held by klogd/4416:
 #0: ffff8880b993b598 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2f/0x120 kernel/sched/core.c:537
 #1: ffff8880b99287c8 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: __wake_up_common_lock+0xb8/0x140 kernel/sched/wait.c:137
 #2: ffff88807e4c0970 (&p->pi_lock){-.-.}-{2:2}, at: try_to_wake_up+0xb2/0x2080 kernel/sched/core.c:4149
 #3: ffff8880b993b598 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2f/0x120 kernel/sched/core.c:537
2 locks held by getty/4749:
 #0: ffff888027d14098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x26/0x80 drivers/tty/tty_ldisc.c:244
 #1: ffffc900015802f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xef4/0x13e0 drivers/tty/n_tty.c:2177
3 locks held by syz-executor312/5066:
 #0: ffff88802b554460 (sb_writers#4){.+.+}-{0:0}, at: do_renameat2+0x37f/0xc30 fs/namei.c:4866
 #1: ffff8880761e5e48 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:791 [inline]
 #1: ffff8880761e5e48 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: lock_rename+0x229/0x280 fs/namei.c:2990
 #2: ffff8880761e5b10 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline]
 #2: ffff8880761e5b10 (&ei->xattr_sem){++++}-{3:3}, at: ext4_try_add_inline_entry+0x10c/0x8d0 fs/ext4/inline.c:1289

=============================================

NMI backtrace for cpu 0
CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.2.0-rc5-syzkaller-00047-g7c46948a6e9c #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd1/0x138 lib/dump_stack.c:106
 nmi_cpu_backtrace.cold+0x24/0x18a lib/nmi_backtrace.c:111
 nmi_trigger_cpumask_backtrace+0x333/0x3c0 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline]
 watchdog+0xc75/0xfc0 kernel/hung_task.c:377
 kthread+0x2e8/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 11 Comm: kworker/u4:1 Not tainted 6.2.0-rc5-syzkaller-00047-g7c46948a6e9c #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:native_apic_mem_read arch/x86/include/asm/apic.h:112 [inline]
RIP: 0010:__xapic_wait_icr_idle arch/x86/kernel/apic/ipi.c:107 [inline]
RIP: 0010:__default_send_IPI_dest_field+0x32/0x130 arch/x86/kernel/apic/ipi.c:156
Code: fc 55 53 89 d3 48 83 ec 08 83 fe 02 74 73 a0 60 f8 eb ff ff fb ff ff 84 c0 74 08 3c 03 0f 8e a8 00 00 00 8b 04 25 00 c3 5f ff <48> bd 60 f8 eb ff ff fb ff ff f6 c4 10 74 1e f3 90 0f b6 45 00 84
RSP: 0018:ffffc900001078a8 EFLAGS: 00000046
RAX: 00000000000008fb RBX: 0000000000000800 RCX: 0000000000000001
RDX: 0000000000000800 RSI: 00000000000000fb RDI: 0000000000000001
RBP: 1ffff92000020f1e R08: 0000000000000005 R09: 0000000000000001
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000001
R13: ffffc90000107910 R14: 0000000000000002 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000563a723b2680 CR3: 000000000c48e000 CR4: 0000000000350ee0
Call Trace:
 <TASK>
 _flat_send_IPI_mask+0x4e/0x60 arch/x86/kernel/apic/apic_flat_64.c:56
 arch_send_call_function_single_ipi arch/x86/include/asm/smp.h:108 [inline]
 send_call_function_single_ipi+0x1ed/0x3b0 kernel/sched/core.c:3823
 smp_call_function_many_cond+0xe64/0x10a0 kernel/smp.c:967
 on_each_cpu_cond_mask+0x5a/0xa0 kernel/smp.c:1155
 on_each_cpu include/linux/smp.h:71 [inline]
 text_poke_sync arch/x86/kernel/alternative.c:1772 [inline]
 text_poke_bp_batch+0x3f1/0x6b0 arch/x86/kernel/alternative.c:2016
 text_poke_flush arch/x86/kernel/alternative.c:2131 [inline]
 text_poke_flush arch/x86/kernel/alternative.c:2128 [inline]
 text_poke_finish+0x1a/0x30 arch/x86/kernel/alternative.c:2138
 arch_jump_label_transform_apply+0x17/0x30 arch/x86/kernel/jump_label.c:146
 jump_label_update+0x32f/0x410 kernel/jump_label.c:829
 static_key_disable_cpuslocked+0x156/0x1b0 kernel/jump_label.c:235
 static_key_disable+0x1a/0x20 kernel/jump_label.c:243
 toggle_allocation_gate mm/kfence/core.c:804 [inline]
 toggle_allocation_gate+0x143/0x230 mm/kfence/core.c:791
 process_one_work+0x9bf/0x1710 kernel/workqueue.c:2289
 worker_thread+0x669/0x1090 kernel/workqueue.c:2436
 kthread+0x2e8/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>