Warning: closing connection to zebra because of an I/O error!

[DS819src]

Description

The following error message occurs occasionally. I work with network namespaces, instead of vrf.

amenonuhoko# sh ip route vrf all
Warning: closing connection to zebra because of an I/O error!
Warning: connecting to zebra...failed!
amenonuhoko# sh ip route vrf all
Warning: connecting to zebra...failed!
zebra is not running
amenonuhoko# sh ip route vrf all
Warning: connecting to zebra...success!
Warning: closing connection to mgmtd because of an I/O error!
Warning: connecting to mgmtd...success!
Warning: closing connection to ospfd because of an I/O error!
Warning: connecting to ospfd...success!
Warning: closing connection to ospf6d because of an I/O error!
Warning: connecting to ospf6d...success!
Warning: closing connection to bgpd because of an I/O error!
Warning: connecting to bgpd...success!
Warning: closing connection to isisd because of an I/O error!
Warning: connecting to isisd...success!
Warning: closing connection to staticd because of an I/O error!
Warning: connecting to staticd...success!

Version

FRRouting 10.0 (amenonuhoko) on Linux(6.1.0-20-amd64).
Copyright 1996-2005 Kunihiro Ishiguro, et al.
configured with:
    '--build=x86_64-linux-gnu' '--prefix=/usr' '--includedir=${prefix}/include' '--mandir=${prefix}/share/man' '--infodir=${prefix}/share/info' '--sysconfdir=/etc' '--localstatedir=/var' '--disable-option-checking' '--disable-silent-rules' '--libdir=${prefix}/lib/x86_64-linux-gnu' '--libexecdir=${prefix}/lib/x86_64-linux-gnu' '--disable-maintainer-mode' '--sbindir=/usr/lib/frr' '--with-vtysh-pager=/usr/bin/pager' '--libdir=/usr/lib/x86_64-linux-gnu/frr' '--with-moduledir=/usr/lib/x86_64-linux-gnu/frr/modules' '--disable-dependency-tracking' '--enable-rpki' '--disable-scripting' '--enable-pim6d' '--with-libpam' '--enable-doc' '--enable-doc-html' '--enable-snmp' '--enable-fpm' '--disable-protobuf' '--disable-zeromq' '--enable-ospfapi' '--enable-bgp-vnc' '--enable-multipath=256' '--enable-user=frr' '--enable-group=frr' '--enable-vty-group=frrvty' '--enable-configfile-mask=0640' '--enable-logfile-mask=0640' 'build_alias=x86_64-linux-gnu' 'PYTHON=python3'

How to reproduce

It occurs occasionally.

Expected behavior

Zebra doesn't terminate the connection. This behavior doesn't appear in version 9.1.

Actual behavior

# coredumpctl 
TIME                            PID  UID  GID SIG     COREFILE EXE                          SIZE
Sun 2024-04-21 22:42:05 CEST 969587  111  145 SIGSEGV missing  /usr/lib/frr/zebra              -
Fri 2024-04-26 17:10:09 CEST 825488  111  145 SIGSEGV present  /usr/lib/frr/zebra         762.7K

coredumpctl dump 825488

       PID: 825488 (zebra)
       UID: 111 (frr)
       GID: 145 (frr)
    Signal: 11 (SEGV)
 Timestamp: Fri 2024-04-26 17:10:09 CEST (1min 38s ago)

Command Line: /usr/lib/frr/zebra -d -F traditional -A 127.0.0.1 -s 90000000 -n
Executable: /usr/lib/frr/zebra
Control Group: /system.slice/frr.service
Unit: frr.service
Slice: system.slice
Boot ID: 441257eb9d8c4cb9a6eb1e298479c2d9
Machine ID: 975b607fdf964e2aa0af9602a8bb0a9d
Hostname: amenonuhoko
Storage: /var/lib/systemd/coredump/core.zebra.111.441257eb9d8c4cb9a6eb1e298479c2d9.825488.1714144209000000.zst (present)
Size on Disk: 762.7K
Message: Process 825488 (zebra) of user 111 dumped core.

            Stack trace of thread 825490:
            #0  0x0000555c132e566c netlink_route_multipath_msg_encode (zebra + 0xa266c)
            #1  0x0000555c132e5f63 n/a (zebra + 0xa2f63)
            #2  0x0000555c132d8fc1 netlink_batch_add_msg (zebra + 0x95fc1)
            #3  0x0000555c132d9318 kernel_update_multi (zebra + 0x96318)
            #4  0x0000555c132fde18 n/a (zebra + 0xbae18)
            #5  0x0000555c132f7887 n/a (zebra + 0xb4887)
            #6  0x00007f5711f0e901 event_call (libfrr.so.0 + 0x10e901)
            #7  0x00007f5711eabe38 n/a (libfrr.so.0 + 0xabe38)
            #8  0x00007f5711b6e134 start_thread (libc.so.6 + 0x89134)
            #9  0x00007f5711bee7dc __clone3 (libc.so.6 + 0x1097dc)
            
            Stack trace of thread 825488:
            #0  0x00007f5711be1256 __ppoll (libc.so.6 + 0xfc256)
            #1  0x00007f5711f0de8e event_fetch (libfrr.so.0 + 0x10de8e)
            #2  0x00007f5711eba49b frr_run (libfrr.so.0 + 0xba49b)
            #3  0x0000555c132c7576 main (zebra + 0x84576)
            #4  0x00007f5711b0c24a __libc_start_call_main (libc.so.6 + 0x2724a)
            #5  0x00007f5711b0c305 __libc_start_main_impl (libc.so.6 + 0x27305)
            #6  0x0000555c132c8521 _start (zebra + 0x85521)
            
            Stack trace of thread 825512:
            #0  0x00007f5711be1256 __ppoll (libc.so.6 + 0xfc256)
            #1  0x00007f5711f0de8e event_fetch (libfrr.so.0 + 0x10de8e)
            #2  0x00007f5711eabde1 n/a (libfrr.so.0 + 0xabde1)
            #3  0x00007f5711b6e134 start_thread (libc.so.6 + 0x89134)
            #4  0x00007f5711bee7dc __clone3 (libc.so.6 + 0x1097dc)
            
            Stack trace of thread 825504:
            #0  0x00007f5711be1256 __ppoll (libc.so.6 + 0xfc256)
            #1  0x00007f5711f0de8e event_fetch (libfrr.so.0 + 0x10de8e)
            #2  0x00007f5711eabde1 n/a (libfrr.so.0 + 0xabde1)
            #3  0x00007f5711b6e134 start_thread (libc.so.6 + 0x89134)
            #4  0x00007f5711bee7dc __clone3 (libc.so.6 + 0x1097dc)
            
            Stack trace of thread 825505:
            #0  0x00007f5711be1256 __ppoll (libc.so.6 + 0xfc256)
            #1  0x00007f5711f0de8e event_fetch (libfrr.so.0 + 0x10de8e)
            #2  0x00007f5711eabde1 n/a (libfrr.so.0 + 0xabde1)
            #3  0x00007f5711b6e134 start_thread (libc.so.6 + 0x89134)
            #4  0x00007f5711bee7dc __clone3 (libc.so.6 + 0x1097dc)
            
            Stack trace of thread 825489:
            #0  0x00007f5711be6719 syscall (libc.so.6 + 0x101719)
            #1  0x00007f5711ef96e7 seqlock_wait (libfrr.so.0 + 0xf96e7)
            #2  0x00007f5711eab167 n/a (libfrr.so.0 + 0xab167)
            #3  0x00007f5711b6e134 start_thread (libc.so.6 + 0x89134)
            #4  0x00007f5711bee7dc __clone3 (libc.so.6 + 0x1097dc)
            
            Stack trace of thread 825506:
            #0  0x00007f5711be1256 __ppoll (libc.so.6 + 0xfc256)
            #1  0x00007f5711f0de8e event_fetch (libfrr.so.0 + 0x10de8e)
            #2  0x00007f5711eabde1 n/a (libfrr.so.0 + 0xabde1)
            #3  0x00007f5711b6e134 start_thread (libc.so.6 + 0x89134)
            #4  0x00007f5711bee7dc __clone3 (libc.so.6 + 0x1097dc)
            
            Stack trace of thread 825491:
            #0  0x00007f5711be1256 __ppoll (libc.so.6 + 0xfc256)
            #1  0x00007f5711f0de8e event_fetch (libfrr.so.0 + 0x10de8e)
            #2  0x00007f5711eabde1 n/a (libfrr.so.0 + 0xabde1)
            #3  0x00007f5711b6e134 start_thread (libc.so.6 + 0x89134)
            #4  0x00007f5711bee7dc __clone3 (libc.so.6 + 0x1097dc)
            
            Stack trace of thread 825507:
            #0  0x00007f5711be1256 __ppoll (libc.so.6 + 0xfc256)
            #1  0x00007f5711f0de8e event_fetch (libfrr.so.0 + 0x10de8e)
            #2  0x00007f5711eabde1 n/a (libfrr.so.0 + 0xabde1)
            #3  0x00007f5711b6e134 start_thread (libc.so.6 + 0x89134)
            #4  0x00007f5711bee7dc __clone3 (libc.so.6 + 0x1097dc)
            
            Stack trace of thread 825515:
            #0  0x00007f5711be1256 __ppoll (libc.so.6 + 0xfc256)
            #1  0x00007f5711f0de8e event_fetch (libfrr.so.0 + 0x10de8e)
            #2  0x00007f5711eabde1 n/a (libfrr.so.0 + 0xabde1)
            #3  0x00007f5711b6e134 start_thread (libc.so.6 + 0x89134)
            #4  0x00007f5711bee7dc __clone3 (libc.so.6 + 0x1097dc)
            
            Stack trace of thread 825509:
            #0  0x00007f5711be1256 __ppoll (libc.so.6 + 0xfc256)
            #1  0x00007f5711f0de8e event_fetch (libfrr.so.0 + 0x10de8e)
            #2  0x00007f5711eabde1 n/a (libfrr.so.0 + 0xabde1)
            #3  0x00007f5711b6e134 start_thread (libc.so.6 + 0x89134)
            #4  0x00007f5711bee7dc __clone3 (libc.so.6 + 0x1097dc)
            ELF object binary architecture: AMD x86-64

Refusing to dump core to tty (use shell redirection or specify --output).

### Additional context

I think maybe this error is part of #15748

### Checklist

- [X] I have searched the open issues for this bug.
- [X] I have not included sensitive information in this report.