[PATCH] expand: fix SIGBUS due to unaligned access

Replace direct uint64_t dereference with memcpy() to avoid
SIGBUS on armv7 when p is not 8-byte aligned.

Fixes crashes in dash during IFS splitting on strict-alignment
architectures.

Signed-off-by: Natanael Copa <[email protected]>
---
 src/expand.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Downstream report:
https://gitlab.alpinelinux.org/alpine/aports/-/issues/17896

diff --git a/src/expand.c b/src/expand.c
index 8c8bf0e..4ac9d17 100644
--- a/src/expand.c
+++ b/src/expand.c
@@ -1335,7 +1335,7 @@ ifsbreakup(char *string, int maxargs, struct arglist *arglist)
 						unsigned char b[8];
 					} x;
 
-					x.qw = *(uint64_t *)p;
+					memcpy(&x.qw, p, sizeof(x.qw));
 
 					if ((x.qw & 0x8080808080808080))
 						break;
-- 
2.52.0