busybox: fix awk handling of literal backslashes

closes #211

core/busybox/checksums

@@ -10,6 +10,7 @@ f17db98491aab9d838e5c0b64e896b619bba5b9c819f11871692338c94cbcbd460
 0a1941324ddafd093406d518ee1fca0c3d6c6839e1834889013fc935dd1bdd2f85
 a25b0ce9d36091e9368ccd527dec9594582cce097c5de17ad33c7c85b4543a90fd
 f62969ee1426bea40ffd603cb01aa4f6e264930ce29a0266b776f5d08253772a78
+a206d4463ceeb27d5092ea97d7db04a9af64e8e8b004bdb06d3eb3a957fb0419fe
 2fc84cd00bba1a27bb692fb61f7b06307bd2a618161c1f019efd5a8432b0f3c53f
 473bf2b8963fb8fc28fd05edc36d610606f77a6f34f652e951e3f68a8473ba4913
 370c6baac161233f55409fa1f4f8a381e6c516a957a781ad307e4704a604e9016a

core/busybox/patches/awk-fix-literal-backslash.patch

@@ -0,0 +1,19 @@
+diff --git a/editors/awk.c b/editors/awk.c
+index 64e752f4b..40f5ba7f7 100644
+--- a/editors/awk.c
++++ b/editors/awk.c
+@@ -2636,8 +2636,13 @@ static int awk_sub(node *rn, const char *repl, int nm, var *src, var *dest /*,in
+ 					resbuf = qrealloc(resbuf, residx + replen + n, &resbufsize);
+ 					memcpy(resbuf + residx, sp + pmatch[j].rm_so - start_ofs, n);
+ 					residx += n;
+-				} else
++				} else {
++/* '\\' and '&' following a backslash keep its original meaning, any other
++ * occurrence of a '\\' should be treated as literal */
++					if (bslash && c != '\\' && c != '&')
++						resbuf[residx++] = '\\';
+ 					resbuf[residx++] = c;
++				}
+ 				bslash = 0;
+ 			}
+ 		}

core/busybox/sources

@@ -10,6 +10,7 @@ files/syslogd.run
 patches/CVE-2022-28391.patch
 patches/CVE-2023-42366.patch
 patches/adduser-no-setgid.patch
+patches/awk-fix-literal-backslash.patch
 patches/fsck-resolve-uuid.patch
 patches/init-use-baseinit.patch
 patches/lineedit-Handle-SIGWINCH-gracefully.patch

core/busybox/version

@@ -1 +1 @@
-1.37.0 1
+1.37.0 2