ASAN crash in master: SEGV zebra/zebra_pw.c:137 in zebra_pw_enabled

[mwinter-osr]

Description

Since sha a4fb596 we have a crash in the ASAN testing of FRR master in ldp_snmp: test_ldp_snmp_topo1 test

# cat ldp_snmp.test_ldp_snmp_topo1/r1.asan.zebra.31837
=================================================================
==31837==ERROR: AddressSanitizer: SEGV on unknown address 0x0000000000ac (pc 0x56046c00d496 bp 0x7ffd69950950 sp 0x7ffd69950950 T0)
==31837==The signal is caused by a READ memory access.
==31837==Hint: address points to the zero page.
    #0 0x56046c00d496 in zebra_pw_enabled zebra/zebra_pw.c:137
    #1 0x56046c011426 in zebra_pw_handle_dplane_results zebra/zebra_pw.c:214
    #2 0x56046c01981d in rib_process_dplane_results zebra/zebra_rib.c:4959
    #3 0x7fc5cf2da301 in event_call lib/event.c:1996
    #4 0x7fc5cf20dcf6 in frr_run lib/libfrr.c:1238
    #5 0x56046bf2f3b3 in main zebra/main.c:526
    #6 0x7fc5ced0c249 in __libc_start_call_main ../sysdeps/nptl/libc_start_call_main.h:58
    #7 0x7fc5ced0c304 in __libc_start_main_impl ../csu/libc-start.c:360
    #8 0x56046bf03790 in _start (/usr/lib/frr/zebra+0x1a4790)

AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV zebra/zebra_pw.c:137 in zebra_pw_enabled
==31837==ABORTING

Most likely candidate is PR #17009

Version

Master as of sha a4fb596 and newer

How to reproduce

ASAN run (AddressSanitizer Debian 12 amd64 Part 7 on CI)

Expected behavior

passing

Actual behavior

crashing

Additional context

No response

Checklist

• I have searched the open issues for this bug.
• I have not included sensitive information in this report.