From: Christos Zoulas <christos@zoulas.com>
Date: Sun, 7 Mar 2004 16:16:14 +0000 (+0000)
Subject: check for file too small before dereferencing a pointer
X-Git-Tag: FILE5_05~899
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=b0ba3486d1ec06f27535e7836d98ba4adbf05227;p=file

check for file too small before dereferencing a pointer
---

diff --git a/src/apprentice.c b/src/apprentice.c
index 6cf51d88..33ce218f 100644
--- a/src/apprentice.c
+++ b/src/apprentice.c
@@ -50,7 +50,7 @@
 #endif
 
 #ifndef	lint
-FILE_RCSID("@(#)$Id: apprentice.c,v 1.72 2003/12/23 17:33:38 christos Exp $")
+FILE_RCSID("@(#)$Id: apprentice.c,v 1.73 2004/03/07 16:16:14 christos Exp $")
 #endif	/* lint */
 
 #define	EATAB {while (isascii((unsigned char) *l) && \
@@ -971,6 +971,10 @@ apprentice_map(struct magic_set *ms, struct magic **magicp, uint32_t *nmagicp,
 		file_error(ms, errno, "cannot stat `%s'", dbname);
 		goto error;
 	}
+	if (st.st_size < 16) {
+		file_error(ms, 0, "file `%s' is too small", dbname);
+		goto error;
+	}
 
 #ifdef QUICK
 	if ((mm = mmap(0, (size_t)st.st_size, PROT_READ|PROT_WRITE,