INFO: task hwrng:750 blocked for more than 143 seconds.
      Not tainted 6.7.0-rc8-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:hwrng           state:D stack:29448 pid:750   tgid:750   ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5376 [inline]
 __schedule+0xedb/0x5af0 kernel/sched/core.c:6688
 __schedule_loop kernel/sched/core.c:6763 [inline]
 schedule+0xe9/0x270 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+0x5b9/0x9d0 kernel/locking/mutex.c:747
 hwrng_fillfn+0x145/0x430 drivers/char/hw_random/core.c:504
 kthread+0x2c6/0x3a0 kernel/kthread.c:388
 ret_from_fork+0x45/0x80 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: ffffffff8cfab760 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:301 [inline]
 #0: ffffffff8cfab760 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:747 [inline]
 #0: ffffffff8cfab760 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6614
1 lock held by hwrng/750:
 #0: ffffffff8dbb0128 (reading_mutex){+.+.}-{3:3}, at: hwrng_fillfn+0x145/0x430 drivers/char/hw_random/core.c:504
3 locks held by kworker/u4:8/2432:
 #0: ffff8880b983c718 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x29/0x130 kernel/sched/core.c:558
 #1: ffff8880b9828888 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x2d9/0x900 kernel/sched/psi.c:988
 #2: ffff8880b98297d8 (&base->lock){-.-.}-{2:2}, at: lock_timer_base+0x5d/0x200 kernel/time/timer.c:999
2 locks held by getty/4818:
 #0: ffff88814b3bb0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
 #1: ffffc900031232f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc6/0x1490 drivers/tty/n_tty.c:2201
1 lock held by syz-executor.2/13892:
1 lock held by syz-executor.0/13928:
2 locks held by syz-executor.2/13962:
1 lock held by syz-executor.2/13963:
1 lock held by syz-executor.2/14040:
2 locks held by syz-executor.2/14095:
1 lock held by syz-executor.0/14136:
1 lock held by syz-executor.2/14155:

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

NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.7.0-rc8-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
 nmi_cpu_backtrace+0x277/0x390 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x299/0x300 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+0xf87/0x1210 kernel/hung_task.c:379
 kthread+0x2c6/0x3a0 kernel/kthread.c:388
 ret_from_fork+0x45/0x80 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: 14136 Comm: syz-executor.0 Not tainted 6.7.0-rc8-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
RIP: 0010:get_current arch/x86/include/asm/current.h:41 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x4/0x60 kernel/kcov.c:206
Code: 66 0f 1f 44 00 00 f3 0f 1e fa 48 8b be b0 01 00 00 e8 b0 ff ff ff 31 c0 c3 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 f3 0f 1e fa <65> 48 8b 14 25 c0 bc 03 00 65 8b 05 64 4a 7c 7e a9 00 01 ff 00 48
RSP: 0018:ffffc9000da36320 EFLAGS: 00000286
RAX: 0000000000000002 RBX: ffffc9000da363a8 RCX: ffffffff8139f7f5
RDX: ffff88801e253b80 RSI: 0000000000000000 RDI: 0000000000000007
RBP: 0000000000000001 R08: 0000000000000007 R09: 0000000000000000
R10: ffffffff81be2193 R11: 0000000000000001 R12: ffffffff81be2193
R13: 0000000000000000 R14: ffffc9000da36468 R15: ffffc9000da363dd
FS:  00007f37c59dd6c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055b48b383030 CR3: 000000007b1f2000 CR4: 0000000000350ef0
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 orc_find arch/x86/kernel/unwind_orc.c:206 [inline]
 unwind_next_frame+0x1c3/0x2390 arch/x86/kernel/unwind_orc.c:494
 arch_stack_walk+0xfa/0x170 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x96/0xd0 kernel/stacktrace.c:122
 save_stack+0x160/0x1f0 mm/page_owner.c:128
 __reset_page_owner+0x5a/0x190 mm/page_owner.c:149
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1137 [inline]
 free_unref_page_prepare+0x4fa/0xaa0 mm/page_alloc.c:2347
 free_unref_page_list+0xe6/0xb40 mm/page_alloc.c:2533
 shrink_folio_list+0x2818/0x3f00 mm/vmscan.c:1487
 evict_folios+0x6e7/0x1b90 mm/vmscan.c:4499
 try_to_shrink_lruvec+0x638/0xa10 mm/vmscan.c:4704
 lru_gen_shrink_lruvec mm/vmscan.c:4849 [inline]
 shrink_lruvec+0x314/0x2990 mm/vmscan.c:5622
 shrink_node_memcgs mm/vmscan.c:5842 [inline]
 shrink_node+0x811/0x3710 mm/vmscan.c:5877
 shrink_zones mm/vmscan.c:6116 [inline]
 do_try_to_free_pages+0x36c/0x1940 mm/vmscan.c:6178
 try_to_free_mem_cgroup_pages+0x31a/0x770 mm/vmscan.c:6493
 try_charge_memcg+0x3d3/0x11f0 mm/memcontrol.c:2742
 try_charge mm/memcontrol.c:2884 [inline]
 charge_memcg mm/memcontrol.c:7210 [inline]
 __mem_cgroup_charge+0xa6/0x140 mm/memcontrol.c:7225
 mem_cgroup_charge include/linux/memcontrol.h:684 [inline]
 __filemap_add_folio+0x88c/0xed0 mm/filemap.c:854
 filemap_add_folio+0xb1/0x1e0 mm/filemap.c:937
 page_cache_ra_unbounded+0x1d0/0x5f0 mm/readahead.c:250
 do_page_cache_ra mm/readahead.c:299 [inline]
 page_cache_ra_order+0x72b/0xa80 mm/readahead.c:546
 do_sync_mmap_readahead mm/filemap.c:3150 [inline]
 filemap_fault+0x16a8/0x3570 mm/filemap.c:3242
 __do_fault+0x107/0x600 mm/memory.c:4266
 do_read_fault mm/memory.c:4629 [inline]
 do_fault mm/memory.c:4763 [inline]
 do_pte_missing mm/memory.c:3731 [inline]
 handle_pte_fault mm/memory.c:5039 [inline]
 __handle_mm_fault+0x2683/0x3d70 mm/memory.c:5180
 handle_mm_fault+0x47a/0xa10 mm/memory.c:5345
 faultin_page mm/gup.c:956 [inline]
 __get_user_pages+0x4b2/0x1490 mm/gup.c:1239
 populate_vma_page_range+0x2d4/0x420 mm/gup.c:1677
 __mm_populate+0x1d7/0x380 mm/gup.c:1786
 mm_populate include/linux/mm.h:3379 [inline]
 vm_mmap_pgoff+0x2cd/0x3c0 mm/util.c:561
 ksys_mmap_pgoff+0x422/0x5b0 mm/mmap.c:1425
 __do_sys_mmap arch/x86/kernel/sys_x86_64.c:93 [inline]
 __se_sys_mmap arch/x86/kernel/sys_x86_64.c:86 [inline]
 __x64_sys_mmap+0x125/0x190 arch/x86/kernel/sys_x86_64.c:86
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f37c6e7cce9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f37c59dd0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007f37c6f9c050 RCX: 00007f37c6e7cce9
RDX: 0000000001000002 RSI: 0000000000b36000 RDI: 0000000020000000
RBP: 00007f37c6ec947a R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000028011 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f37c6f9c050 R15: 00007ffdcd66dd88
 </TASK>