From [email protected], via OpenBSD: add checks for memory allocation

failure.

diff --git a/optimize.c b/optimize.c
index 3145af5094328f0e88177135ea1abf2c111687f3..59101f4602fd45eebde71817edac7bb3bf743f6d 100644 (file)
--- a/optimize.c
+++ b/optimize.c
@@ -22,7 +22,7 @@
  */
 #ifndef lint
 static const char rcsid[] =
-    "@(#) $Header: /tcpdump/master/libpcap/optimize.c,v 1.75 2002-08-12 02:38:11 itojun Exp $ (LBL)";
+    "@(#) $Header: /tcpdump/master/libpcap/optimize.c,v 1.76 2003-03-08 08:26:31 guy Exp $ (LBL)";
 #endif
 
 #ifdef HAVE_CONFIG_H
@@ -1842,17 +1842,23 @@ opt_init(root)
        unMarkAll();
        n = count_blocks(root);
        blocks = (struct block **)malloc(n * sizeof(*blocks));
+       if (blocks == NULL)
+               bpf_error("malloc");
        unMarkAll();
        n_blocks = 0;
        number_blks_r(root);
 
        n_edges = 2 * n_blocks;
        edges = (struct edge **)malloc(n_edges * sizeof(*edges));
+       if (edges == NULL)
+               bpf_error("malloc");
 
        /*
         * The number of levels is bounded by the number of nodes.
         */
        levels = (struct block **)malloc(n_blocks * sizeof(*levels));
+       if (levels == NULL)
+               bpf_error("malloc");
 
        edgewords = n_edges / (8 * sizeof(bpf_u_int32)) + 1;
        nodewords = n_blocks / (8 * sizeof(bpf_u_int32)) + 1;
@@ -1860,6 +1866,8 @@ opt_init(root)
        /* XXX */
        space = (bpf_u_int32 *)malloc(2 * n_blocks * nodewords * sizeof(*space)
                                 + n_edges * edgewords * sizeof(*space));
+       if (space == NULL)
+               bpf_error("malloc");
        p = space;
        all_dom_sets = p;
        for (i = 0; i < n; ++i) {
@@ -1897,6 +1905,8 @@ opt_init(root)
        maxval = 3 * max_stmts;
        vmap = (struct vmapinfo *)malloc(maxval * sizeof(*vmap));
        vnode_base = (struct valnode *)malloc(maxval * sizeof(*vnode_base));
+       if (vmap == NULL || vnode_base == NULL)
+               bpf_error("malloc");
 }
 
 /*
@@ -2093,6 +2103,8 @@ icode_to_fcode(root, lenp)
            n = *lenp = count_stmts(root);
 
            fp = (struct bpf_insn *)malloc(sizeof(*fp) * n);
+           if (fp == NULL)
+                   bpf_error("malloc");
            memset((char *)fp, 0, sizeof(*fp) * n);
            fstart = fp;
            ftail = fp + n;