syzbot

INFO: task kworker/0:2:54 blocked for more than 143 seconds.
      Not tainted 6.7.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:2     state:D
 stack:23368 pid:54    tgid:54    ppid:2      flags:0x00004000
Workqueue: events_long flush_old_commits

Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5376 [inline]
 __schedule+0x1960/0x4a80 kernel/sched/core.c:6688
 __schedule_loop kernel/sched/core.c:6763 [inline]
 schedule+0x149/0x260 kernel/sched/core.c:6778
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6835
 __mutex_lock_common kernel/locking/mutex.c:679 [inline]
 __mutex_lock+0x6a3/0xd60 kernel/locking/mutex.c:747
 reiserfs_write_lock+0x7a/0xd0 fs/reiserfs/lock.c:27
 reiserfs_sync_fs fs/reiserfs/super.c:76 [inline]
 flush_old_commits+0x1e3/0x2f0 fs/reiserfs/super.c:111
 process_one_work kernel/workqueue.c:2630 [inline]
 process_scheduled_works+0x90f/0x1400 kernel/workqueue.c:2703
 worker_thread+0xa5f/0xff0 kernel/workqueue.c:2784
 kthread+0x2d3/0x370 kernel/kthread.c:388
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/29:
 #0: ffffffff8d92d0a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:301 [inline]
 #0: ffffffff8d92d0a0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:747 [inline]
 #0: ffffffff8d92d0a0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6613
4 locks held by kworker/0:2/54:
 #0: 
ffff888012c71538
 (
(wq_completion)events_long
){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2605 [inline]
){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1400 kernel/workqueue.c:2703
 #1: ffffc90000bf7d20 ((work_completion)(&(&sbi->old_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2605 [inline]
 #1: ffffc90000bf7d20 ((work_completion)(&(&sbi->old_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1400 kernel/workqueue.c:2703
 #2: ffff888017b180e0 (&type->s_umount_key#24){++++}-{3:3}, at: flush_old_commits+0xcb/0x2f0 fs/reiserfs/super.c:97
 #3: ffff88807ad74090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock+0x7a/0xd0 fs/reiserfs/lock.c:27
2 locks held by getty/4817:
 #0: ffff8880263bb0a0 (&tty->ldisc_sem){++++}-{0:0}
, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
 #1: ffffc90002efe2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b4/0x1e10 drivers/tty/n_tty.c:2201
7 locks held by syz-executor214/5064:

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

NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.7.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023
Call Trace:
 <TASK>
 __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+0x198/0x310 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
 watchdog+0xfa9/0xff0 kernel/hung_task.c:379
 kthread+0x2d3/0x370 kernel/kthread.c:388
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 5064 Comm: syz-executor214 Not tainted 6.7.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023
RIP: 0010:get_current arch/x86/include/asm/current.h:41 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:235 [inline]
RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x8/0x90 kernel/kcov.c:304
Code: 00 00 00 48 89 44 0a 10 48 89 74 0a 18 4c 89 44 0a 20 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 f3 0f 1e fa 4c 8b 04 24 <65> 48 8b 15 f0 f2 74 7e 65 8b 05 f1 f2 74 7e a9 00 01 ff 00 74 10
RSP: 0018:ffffc90000007e50 EFLAGS: 00000046
RAX: ffffffff817d8bd1 RBX: 0000000000000001 RCX: ffff88801a689dc0
RDX: 0000000000010002 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffff8880b982b880 R08: ffffffff817d8bdb R09: 0000000000000000
R10: ffff8880b982c198 R11: ffffed1017305835 R12: 0000000000000001
R13: ffff8880b982b880 R14: 7fffffffffffffff R15: ffff8880b982bc68
FS:  000055555603c380(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000559f85406600 CR3: 000000002747d000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 __next_base kernel/time/hrtimer.c:492 [inline]
 __hrtimer_next_event_base+0x2b/0x280 kernel/time/hrtimer.c:512
 __hrtimer_get_next_event kernel/time/hrtimer.c:589 [inline]
 hrtimer_update_next_event kernel/time/hrtimer.c:614 [inline]
 hrtimer_interrupt+0x4a2/0x980 kernel/time/hrtimer.c:1817
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1065 [inline]
 __sysvec_apic_timer_interrupt+0x104/0x390 arch/x86/kernel/apic/apic.c:1082
 sysvec_apic_timer_interrupt+0x90/0xb0 arch/x86/kernel/apic/apic.c:1076
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:console_trylock_spinning kernel/printk/printk.c:1975 [inline]
RIP: 0010:vprintk_emit+0x4e6/0x720 kernel/printk/printk.c:2302
Code: 21 e3 0f 85 a6 01 00 00 e8 b7 b8 1d 00 44 8b 24 24 4d 85 ff 75 07 e8 a9 b8 1d 00 eb 06 e8 a2 b8 1d 00 fb 48 c7 c7 60 8c 80 8d <31> f6 ba 01 00 00 00 31 c9 41 b8 01 00 00 00 45 31 c9 41 56 e8 71
RSP: 0018:ffffc900040eec00 EFLAGS: 00000293
RAX: ffffffff817109ae RBX: 0000000000000000 RCX: ffff88801a689dc0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8d808c60
RBP: ffffc900040eecf0 R08: ffffffff8171098b R09: 1ffffffff21bac85
R10: dffffc0000000000 R11: fffffbfff21bac86 R12: 0000000000000086
R13: dffffc0000000000 R14: ffffffff8171080d R15: 0000000000000200
 _printk+0xd5/0x120 kernel/printk/printk.c:2328
 __reiserfs_warning+0x153/0x1a0 fs/reiserfs/prints.c:290
 reiserfs_read_bitmap_block+0x236/0x6d0 fs/reiserfs/bitmap.c:1434
 scan_bitmap_block+0x1a1/0xff0 fs/reiserfs/bitmap.c:164
 scan_bitmap fs/reiserfs/bitmap.c:402 [inline]
 allocate_without_wrapping_disk fs/reiserfs/bitmap.c:1161 [inline]
 blocknrs_and_prealloc_arrays_from_search_start fs/reiserfs/bitmap.c:1274 [inline]
 reiserfs_allocate_blocknrs+0x2cf9/0x5070 fs/reiserfs/bitmap.c:1375
 reiserfs_get_block+0x3280/0x5130 fs/reiserfs/inode.c:756
 __block_write_begin_int+0x54d/0x1ac0 fs/buffer.c:2119
 reiserfs_write_begin+0x24d/0x520 fs/reiserfs/inode.c:2767
 generic_perform_write+0x31b/0x630 mm/filemap.c:3918
 generic_file_write_iter+0xaf/0x310 mm/filemap.c:4039
 call_write_iter include/linux/fs.h:2020 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x792/0xb20 fs/read_write.c:584
 ksys_write+0x1a0/0x2c0 fs/read_write.c:637
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x44/0x110 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f83a5334f59
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 17 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fff44564fd8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f83a537e082 RCX: 00007f83a5334f59
RDX: 000000000208e24b RSI: 0000000020000280 RDI: 0000000000000005
RBP: 00007f83a53aa5f0 R08: 0000000020000000 R09: 000055555603d4c0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff44565000
R13: 00007fff44565228 R14: 431bde82d7b634db R15: 00007f83a537e01d
 </TASK>
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 2.621 msecs