[Bug 278394] Reproducible kernel panic related to IPv4 routes populated by bird2 (BGP)

From: <bugzilla-noreply_at_freebsd.org>
Date: Tue, 16 Apr 2024 23:11:50 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=278394

--- Comment #5 from Gregory Neil Shapiro <gshapiro@FreeBSD.org> ---
(In reply to Mark Johnston from comment #3)

Bumped kern.kstack_pages to 6 in loader.conf and rebooted.  Verified it was now
6 (previously 4) via sysctl.  It still crashed.  I'll try the route algorithm
change Marek suggested next.

Mark, if you want the core.txt.1 uploaded or another value tried, let me know. 
The new panic info:

 Fatal double fault
 rip 0xffffffff82e3841a rsp 0xfffffe005136e000 rbp 0xfffffe005136e230
 rax 0 rdx 0 rbx 0xfffffe0051590020
 rcx 0x11 rsi 0xfffffe0003df1490 rdi 0xfffffe005136e010
 r8 0 r9 0x5d6 r10 0xfffff8004c927bd8
 r11 0xfffffe005136e260 r12 0xfffffe0003df1490 r13 0xfffffe0003df1460
 r14 0 r15 0xfffffe005136e260 rflags 0x10246
 cs 0x20 ss 0 ds 0x3b es 0x3b fs 0x13 gs 0x1b
 fsbase 0xac6ec290620 gsbase 0xffffffff82a10000 kgsbase 0
 cpuid = 0; apic id = 00
 panic: double fault
 cpuid = 0
 time = 1713308750
 KDB: stack backtrace:
 Uptime: 2m17s

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