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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Matt Reeve <matt@mreeve.com>
Date: Tue, 10 Aug 2021 12:41:04 +0100
Subject: [PATCH] Fix bus error on OSPF on IPQ806X
On a Netgear R7800, if ospf v2 or v3 is configured in bird.conf, it fails
to start with this error:
kernel: Alignment trap: not handling instruction f44c0a1f at [<00035848>]
kernel: Unhandled fault: alignment exception (0x801) at 0x007e0624
The problem is due to a struct not being properly aligned on the ARMv7
architecture.
This patch fixes the problem by adding the "PACKED" macro to the affected
struct. Note that upstream may later fix this in another way, in which
case this patch will not be required.
Upstream-Status: not submitted. As of 2.19.2 the structure still carries
no alignment attribute.
Signed-off-by: Matt Reeve <matt@mreeve.com>
---
--- a/proto/ospf/topology.h
+++ b/proto/ospf/topology.h
@@ -41,7 +41,7 @@ struct top_hash_entry
u8 mode; /* LSA generated during RT calculation (LSA_RTCALC or LSA_STALE)*/
u8 nhs_reuse; /* Whether nhs nodes can be reused during merging.
See a note in rt.c:add_cand() */
-};
+} PACKED;
/* Prevents ospf_hash_find() to ignore the entry, for p->lsrqh and p->lsrth */
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