From: David F. Skoll <dfs@roaringpenguin.com>
Date: Mon, 24 Jun 2002 12:42:24 +0000 (+0000)
Subject: Check return code of mmap (bug reported by Nick Bane)
X-Git-Tag: ppp-2.4.7~412
X-Git-Url: http://git.ozlabs.org/?p=ppp.git;a=commitdiff_plain;h=f488cb944f033b385052d44b8e0846880e80b5db;hp=3940021f0d95f88aebdb6409fa75570ba686c92c

Check return code of mmap (bug reported by Nick Bane)
---

diff --git a/pppd/tdb.c b/pppd/tdb.c
index 7fd5829..c6498d6 100644
--- a/pppd/tdb.c
+++ b/pppd/tdb.c
@@ -210,6 +210,9 @@ static int tdb_oob(TDB_CONTEXT *tdb, tdb_off offset)
 	tdb->map_ptr = (void *)mmap(NULL, tdb->map_size, 
 				    tdb->read_only?PROT_READ:PROT_READ|PROT_WRITE,
 				    MAP_SHARED | MAP_FILE, tdb->fd, 0);
+	if (tdb->map_ptr == MAP_FAILED) {
+	    tdb->map_ptr = NULL;
+	}
 #endif	
 	return 0;
 }
@@ -373,6 +376,9 @@ static int tdb_expand(TDB_CONTEXT *tdb, tdb_off length)
             tdb->map_ptr = (void *)mmap(NULL, tdb->map_size, 
                                         PROT_READ|PROT_WRITE,
                                         MAP_SHARED | MAP_FILE, tdb->fd, 0);
+	    if (tdb->map_ptr == MAP_FAILED) {
+		tdb->map_ptr = NULL;
+	    }
         }
 #endif
 
@@ -1180,6 +1186,9 @@ TDB_CONTEXT *tdb_open(char *name, int hash_size, int tdb_flags,
             tdb.map_ptr = (void *)mmap(NULL, st.st_size, 
                                        tdb.read_only? PROT_READ : PROT_READ|PROT_WRITE,
                                        MAP_SHARED | MAP_FILE, tdb.fd, 0);
+	    if (tdb.map_ptr == MAP_FAILED) {
+		tdb.map_ptr = NULL;
+	    }
         }
 #endif