From: Nathan Wagner <nw@hydaspes.if.org>
Date: Sat, 2 Jan 2016 07:32:09 +0000 (+0000)
Subject: add test for file length to soname
X-Git-Tag: v0.1.6~199
X-Git-Url: https://pd.if.org/git/?p=zpackage;a=commitdiff_plain;h=6529b32d6c90e00f79b311239d24fd2bfdd73560

add test for file length to soname
---

diff --git a/elf/soname.c b/elf/soname.c
index aa683a5..72d465a 100644
--- a/elf/soname.c
+++ b/elf/soname.c
@@ -36,9 +36,14 @@ int main(int ac, char **av) {
 	if (fstat(elffd, &sbuf) == -1) {
 		exit(1);
 	}
+	/* not a regular file? */
 	if (!S_ISREG(sbuf.st_mode)) {
 		exit(1);
 	}
+	/* not at least the size of the elf header? */
+	if (sbuf.st_size < sizeof(Elf64_Ehdr)) {
+		exit(1);
+	}
 
 	elfbase = mmap(0, sbuf.st_size, PROT_READ,MAP_PRIVATE, elffd, 0);
 	if (!elfbase) {