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authorVratko Polak <vrpolak@cisco.com>2019-07-02 11:07:24 +0200
committerVratko Polak <vrpolak@cisco.com>2019-07-03 17:44:38 +0000
commitfc4828cdbed3f8d6cef8d02239f8603d789ac099 (patch)
tree7c9e510305fa6438a90cd9e8b7a64572c16fa809 /src
parent0c7f54d489c66742903c460daa843ce048dbaf06 (diff)
api: remove garbage from sockclnt_create reply
The fix uses memset to zero after alloc, as sizing of source string is not obvious. Function vl_msg_api_alloc_zero is added (and used), so similar bugs can be fixed easily. Type: fix Ticket: VPP-1716 Change-Id: I3b20040d0de4222686c58779f2c0af78c5543504 Signed-off-by: Vratko Polak <vrpolak@cisco.com>
Diffstat (limited to 'src')
-rw-r--r--src/vlibmemory/memory_shared.c20
-rw-r--r--src/vlibmemory/memory_shared.h2
-rw-r--r--src/vlibmemory/socket_api.c5
3 files changed, 25 insertions, 2 deletions
diff --git a/src/vlibmemory/memory_shared.c b/src/vlibmemory/memory_shared.c
index 703db9da4ec..fa9936982ee 100644
--- a/src/vlibmemory/memory_shared.c
+++ b/src/vlibmemory/memory_shared.c
@@ -209,6 +209,16 @@ vl_msg_api_alloc (int nbytes)
}
void *
+vl_msg_api_alloc_zero (int nbytes)
+{
+ void *ret;
+
+ ret = vl_msg_api_alloc (nbytes);
+ clib_memset (ret, 0, nbytes);
+ return ret;
+}
+
+void *
vl_msg_api_alloc_or_null (int nbytes)
{
int pool;
@@ -226,6 +236,16 @@ vl_msg_api_alloc_as_if_client (int nbytes)
}
void *
+vl_msg_api_alloc_zero_as_if_client (int nbytes)
+{
+ void *ret;
+
+ ret = vl_msg_api_alloc_as_if_client (nbytes);
+ clib_memset (ret, 0, nbytes);
+ return ret;
+}
+
+void *
vl_msg_api_alloc_as_if_client_or_null (int nbytes)
{
return vl_msg_api_alloc_internal (nbytes, 0, 1 /* may_return_null */ );
diff --git a/src/vlibmemory/memory_shared.h b/src/vlibmemory/memory_shared.h
index 662eaf96589..8d5e472e455 100644
--- a/src/vlibmemory/memory_shared.h
+++ b/src/vlibmemory/memory_shared.h
@@ -109,8 +109,10 @@ typedef struct vl_shmem_hdr_
#define VL_API_EPOCH_SHIFT 8
void *vl_msg_api_alloc (int nbytes);
+void *vl_msg_api_alloc_zero (int nbytes);
void *vl_msg_api_alloc_or_null (int nbytes);
void *vl_msg_api_alloc_as_if_client (int nbytes);
+void *vl_msg_api_alloc_zero_as_if_client (int nbytes);
void *vl_msg_api_alloc_as_if_client_or_null (int nbytes);
void *vl_mem_api_alloc_as_if_client_w_reg (vl_api_registration_t * reg,
int nbytes);
diff --git a/src/vlibmemory/socket_api.c b/src/vlibmemory/socket_api.c
index 31c1ff9880e..d3beafb3345 100644
--- a/src/vlibmemory/socket_api.c
+++ b/src/vlibmemory/socket_api.c
@@ -439,7 +439,7 @@ vl_api_sockclnt_create_t_handler (vl_api_sockclnt_create_t * mp)
regp->name = format (0, "%s%c", mp->name, 0);
u32 size = sizeof (*rp) + (nmsg * sizeof (vl_api_message_table_entry_t));
- rp = vl_msg_api_alloc (size);
+ rp = vl_msg_api_alloc_zero (size);
rp->_vl_msg_id = htons (VL_API_SOCKCLNT_CREATE_REPLY);
rp->index = htonl (sock_api_registration_handle (regp));
rp->context = mp->context;
@@ -450,7 +450,8 @@ vl_api_sockclnt_create_t_handler (vl_api_sockclnt_create_t * mp)
hash_foreach_pair (hp, am->msg_index_by_name_and_crc,
({
rp->message_table[i].index = htons(hp->value[0]);
- strncpy((char *)rp->message_table[i].name, (char *)hp->key, 64-1);
+ strncpy_s((char *)rp->message_table[i].name, 64 /* bytes of space at dst */,
+ (char *)hp->key, 64-1 /* chars to copy, without zero byte. */);
i++;
}));
/* *INDENT-ON* */