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commit fea55b0930d7cb67a3359185e53ef6b856b7721d
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Author: Jaromír Končický <jkoncick@redhat.com>
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Date: Tue Oct 15 21:55:52 2013 +0200
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fix potential buffer overflows reported by static analysis
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diff --git a/userspace/arptables/arptables.c b/userspace/arptables/arptables.c
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index 8ef445a..4da6fea 100644
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--- a/userspace/arptables/arptables.c
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+++ b/userspace/arptables/arptables.c
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@@ -1270,7 +1270,7 @@ print_firewall(const struct arpt_entry *fw,
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sprintf(buf, "%s", addr_to_dotted(&(fw->arp.src)));
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else
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sprintf(buf, "%s", addr_to_anyname(&(fw->arp.src)));
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- strcat(buf, mask_to_dotted(&(fw->arp.smsk)));
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+ strncat(buf, mask_to_dotted(&(fw->arp.smsk)), sizeof(buf) - strlen(buf) -1);
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printf("-s %s ", buf);
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}
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@@ -1294,7 +1294,7 @@ after_devsrc:
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sprintf(buf, "%s", addr_to_dotted(&(fw->arp.tgt)));
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else
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sprintf(buf, "%s", addr_to_anyname(&(fw->arp.tgt)));
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- strcat(buf, mask_to_dotted(&(fw->arp.tmsk)));
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+ strncat(buf, mask_to_dotted(&(fw->arp.tmsk)), sizeof(buf) - strlen(buf) -1);
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printf("-d %s ", buf);
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}
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@@ -1796,7 +1796,7 @@ int do_command(int argc, char *argv[], char **table, arptc_handle_t *handle)
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*table, arptc_strerror(errno));
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}
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}
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- }
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+ }
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memset(&fw, 0, sizeof(fw));
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opts = original_opts;
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@@ -2064,7 +2064,8 @@ int do_command(int argc, char *argv[], char **table, arptc_handle_t *handle)
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target->t = fw_calloc(1, size);
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target->t->u.target_size = size;
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- strcpy(target->t->u.user.name, jumpto);
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+ strncpy(target->t->u.user.name, jumpto, sizeof(target->t->u.user.name));
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+ target->t->u.user.name[sizeof(target->t->u.user.name)-1] = '\0';
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/*
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target->init(target->t, &fw.nfcache);
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*/
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diff --git a/userspace/arptables/libarptc/libarptc_incl.c b/userspace/arptables/libarptc/libarptc_incl.c
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index 2fa3d43..9c1aeac 100644
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--- a/userspace/arptables/libarptc/libarptc_incl.c
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+++ b/userspace/arptables/libarptc/libarptc_incl.c
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@@ -209,8 +209,10 @@ alloc_handle(const char *tablename, unsigned int size, unsigned int num_rules)
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h->counter_map = (void *)h
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+ sizeof(STRUCT_TC_HANDLE)
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+ size;
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- strcpy(h->info.name, tablename);
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- strcpy(h->entries.name, tablename);
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+ strncpy(h->info.name, tablename, sizeof(h->info.name));
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+ h->info.name[sizeof(h->info.name)-1] = '\0';
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+ strncpy(h->entries.name, tablename, sizeof(h->entries.name));
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+ h->entries.name[sizeof(h->entries.name)-1] = '\0';
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return h;
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}
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@@ -357,8 +359,9 @@ add_chain(STRUCT_ENTRY *e, TC_HANDLE_T h, STRUCT_ENTRY **prev)
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h->cache_chain_heads[h->cache_num_chains-1].end
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= *prev;
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- strcpy(h->cache_chain_heads[h->cache_num_chains].name,
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- (const char *)GET_TARGET(e)->data);
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+ strncpy(h->cache_chain_heads[h->cache_num_chains].name,
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+ (const char *)GET_TARGET(e)->data, TABLE_MAXNAMELEN-1);
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+ h->cache_chain_heads[h->cache_num_chains].name[TABLE_MAXNAMELEN-1] = '\0';
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h->cache_chain_heads[h->cache_num_chains].start
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= (void *)e + e->next_offset;
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h->cache_num_chains++;
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@@ -368,8 +371,9 @@ add_chain(STRUCT_ENTRY *e, TC_HANDLE_T h, STRUCT_ENTRY **prev)
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h->cache_chain_heads[h->cache_num_chains-1].end
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= *prev;
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- strcpy(h->cache_chain_heads[h->cache_num_chains].name,
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- h->hooknames[builtin-1]);
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+ strncpy(h->cache_chain_heads[h->cache_num_chains].name,
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+ h->hooknames[builtin-1], TABLE_MAXNAMELEN-1);
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+ h->cache_chain_heads[h->cache_num_chains].name[TABLE_MAXNAMELEN-1] = '\0';
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h->cache_chain_heads[h->cache_num_chains].start
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= (void *)e;
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h->cache_num_chains++;
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