From 6db44b0158c37f2206f2c4ea7f29f5b774389e54 Mon Sep 17 00:00:00 2001
From: Justin Hibbits <jhibbits@FreeBSD.org>
Date: Thu, 10 Feb 2022 09:21:36 -0600
Subject: Fix gzip compressed core dumps on big endian architectures

The gzip trailer words (size and CRC) are both little-endian per the spec.

MFC after:	3 days
Sponsored by:	Juniper Networks, Inc.
---
 sys/kern/subr_compressor.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/sys/kern/subr_compressor.c b/sys/kern/subr_compressor.c
index b202d271cfa3..74526a949437 100644
--- a/sys/kern/subr_compressor.c
+++ b/sys/kern/subr_compressor.c
@@ -41,6 +41,7 @@ __FBSDID("$FreeBSD$");
 #include <sys/systm.h>
 
 #include <sys/compressor.h>
+#include <sys/endian.h>
 #include <sys/kernel.h>
 #include <sys/linker_set.h>
 #include <sys/malloc.h>
@@ -201,9 +202,9 @@ gz_write(void *stream, void *data, size_t len, compressor_cb_t cb,
 				 * Try to pack as much of the trailer into the
 				 * output buffer as we can.
 				 */
-				((uint32_t *)trailer)[0] = s->gz_crc;
+				((uint32_t *)trailer)[0] = htole32(s->gz_crc);
 				((uint32_t *)trailer)[1] =
-				    s->gz_stream.total_in;
+				    htole32(s->gz_stream.total_in);
 				room = MIN(sizeof(trailer),
 				    s->gz_bufsz - len);
 				memcpy(s->gz_buffer + len, trailer, room);
-- 
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