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From: Lubomir Rintel <lkundrak@v3.sk>
There are off-by-one errors when filling the ar headers, the trailing nul
would overflow the target buffer.
diff -urp dev86-0.16.17/ld/mkar.c dev86-0.16.17.fixed/ld/mkar.c
--- dev86-0.16.17/ld/mkar.c 2004-06-20 09:23:27.000000000 +0200
+++ dev86-0.16.17.fixed/ld/mkar.c 2010-03-29 23:34:30.351426404 +0200
@@ -51,12 +51,12 @@ char buf[128];
memset(&arbuf, ' ', sizeof(arbuf));
strcpy(buf, ptr); strcat(buf, "/ ");
strncpy(arbuf.ar_name, buf, sizeof(arbuf.ar_name));
-
- sprintf(arbuf.ar_date, "%-12ld", (long)st.st_mtime);
- sprintf(arbuf.ar_uid, "%-6d", (int)(st.st_uid%1000000L));
- sprintf(arbuf.ar_gid, "%-6d", (int)(st.st_gid%1000000L));
- sprintf(arbuf.ar_mode, "%-8lo", (long)st.st_mode);
- sprintf(arbuf.ar_size, "%-10ld", (long)st.st_size);
+
+ snprintf(arbuf.ar_date, 12, "%-12ld", (long)st.st_mtime);
+ snprintf(arbuf.ar_uid, 6, "%-6d", (int)(st.st_uid%1000000L));
+ snprintf(arbuf.ar_gid, 6, "%-6d", (int)(st.st_gid%1000000L));
+ snprintf(arbuf.ar_mode, 8, "%-8lo", (long)st.st_mode);
+ snprintf(arbuf.ar_size, 10, "%-10ld", (long)st.st_size);
memcpy(arbuf.ar_fmag, ARFMAG, sizeof(arbuf.ar_fmag));
if( fwrite(&arbuf, 1, sizeof(arbuf), fd) != sizeof(arbuf) )
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