BUG #17743: Bad RIP VALUE

The following bug has been logged on the website:

Bug reference: 17743
Logged by: Giulio Ferrari
Email address: giulio(dot)ferrari(at)cambieri(dot)it
PostgreSQL version: 12.9
Operating system: Ubuntu 20.04.4 LTS
Description:

On the installation in object I am experiencing this error:

[Wed Jan 4 13:53:20 2023] INFO: task postgres:1796 blocked for more than
241 seconds.
[Wed Jan 4 13:53:20 2023] Tainted: G OE
5.4.0-107-generic #121-Ubuntu
[Wed Jan 4 13:53:20 2023] "echo 0 >
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
[Wed Jan 4 13:53:20 2023] postgres D 0 1796 787 0x00004000
[Wed Jan 4 13:53:20 2023] Call Trace:
[Wed Jan 4 13:53:20 2023] __schedule+0x2e3/0x740
[Wed Jan 4 13:53:20 2023] ? __wake_up_common_lock+0x8a/0xc0
[Wed Jan 4 13:53:20 2023] schedule+0x42/0xb0
[Wed Jan 4 13:53:20 2023] jbd2_log_wait_commit+0xaf/0x120
[Wed Jan 4 13:53:20 2023] ? __wake_up_pollfree+0x40/0x40
[Wed Jan 4 13:53:20 2023] jbd2_complete_transaction+0x5c/0x90
[Wed Jan 4 13:53:20 2023] ext4_sync_file+0x358/0x3b0
[Wed Jan 4 13:53:20 2023] vfs_fsync_range+0x49/0x80
[Wed Jan 4 13:53:20 2023] do_fsync+0x3d/0x70
[Wed Jan 4 13:53:20 2023] __x64_sys_fsync+0x14/0x20
[Wed Jan 4 13:53:20 2023] do_syscall_64+0x57/0x190
[Wed Jan 4 13:53:20 2023] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[Wed Jan 4 13:53:20 2023] RIP: 0033:0x7f22551c3917
[Wed Jan 4 13:53:20 2023] Code: Bad RIP value.
[Wed Jan 4 13:53:20 2023] RSP: 002b:00007fff0998f278 EFLAGS: 00000246
ORIG_RAX: 000000000000004a
[Wed Jan 4 13:53:20 2023] RAX: ffffffffffffffda RBX: 0000000000000000 RCX:
00007f22551c3917
[Wed Jan 4 13:53:20 2023] RDX: 0000000000000002 RSI: 000055a0a97af640 RDI:
000000000000015b
[Wed Jan 4 13:53:20 2023] RBP: 00007fff0998f2c0 R08: 0000000000000001 R09:
0000000000000001
[Wed Jan 4 13:53:20 2023] R10: 0000000000000000 R11: 0000000000000246 R12:
000000000000015b
[Wed Jan 4 13:53:20 2023] R13: 000055a0a97af640 R14: 0000000000000000 R15:
0000000000000016
[Wed Jan 4 23:10:02 2023] session_init(service_process,507875): OK.
kdev=8:5, bs=4096.
[Wed Jan 4 23:10:02 2023] register_make_request(service_process,507875):
OK. kdev=8:5, mq=0.
[Thu Jan 5 23:10:26 2023] session_init(service_process,2838404): OK.
kdev=8:5, bs=4096.
[Thu Jan 5 23:10:26 2023] register_make_request(service_process,2838404):
OK. kdev=8:5, mq=0.
[Fri Jan 6 23:09:59 2023] session_init(service_process,649733): OK.
kdev=8:5, bs=4096.
[Fri Jan 6 23:09:59 2023] register_make_request(service_process,649733):
OK. kdev=8:5, mq=0.

we have no way to reproduce the error consistently, and after this error
happens the database stops responding to connection requests closing even
the existings.

Then after 15-20 minutes the problem stops and the database works again all
by itself.
Is there anything we can do to solve this ?