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--- rpm-4.11.1.orig/lib/cpio.c	2014-11-28 12:21:50.444158675 +0100
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+++ rpm-4.11.1/lib/cpio.c	2014-11-28 12:22:53.776453253 +0100
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@@ -296,6 +296,9 @@
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     st->st_rdev = makedev(major, minor);
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     GET_NUM_FIELD(hdr.namesize, nameSize);
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+    if (nameSize <= 0 || nameSize > 4096) {
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+        return CPIOERR_BAD_HEADER;
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+    }
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     *path = xmalloc(nameSize + 1);
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     read = Fread(*path, nameSize, 1, cpio->fd);