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authorBilly McFall <bmcfall@redhat.com>2017-02-15 11:39:12 -0500
committerDave Barach <openvpp@barachs.net>2017-02-22 16:23:12 +0000
commita9a20e7f69f4a91a4d5267ab5ce14125bdc7d6c6 (patch)
tree58647f28d51d1cac3e7aa4e9ca94280192e6ec25 /src/plugins/lb/cli.c
parent2291a36008e197423a0f0414f6dcca4afa3ac4c1 (diff)
VPP-635: CLI Memory leak with invalid parameter
In the CLI parsing, below is a common pattern: /* Get a line of input. */ if (!unformat_user (input, unformat_line_input, line_input)) return 0; while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT) { if (unformat (line_input, "x")) x = 1; : else return clib_error_return (0, "unknown input `%U'", format_unformat_error, line_input); } unformat_free (line_input); The 'else' returns if an unknown string is encountered. There a memory leak because the 'unformat_free(line_input)' is not called. There is a large number of instances of this pattern. Replaced the previous pattern with: /* Get a line of input. */ if (!unformat_user (input, unformat_line_input, line_input)) return 0; while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT) { if (unformat (line_input, "x")) x = 1; : else { error = clib_error_return (0, "unknown input `%U'", format_unformat_error, line_input); goto done: } } /* ...Remaining code... */ done: unformat_free (line_input); return error; } In multiple files, 'unformat_free (line_input);' was never called, so there was a memory leak whether an invalid string was entered or not. Also, there were multiple instance where: error = clib_error_return (0, "unknown input `%U'", format_unformat_error, line_input); used 'input' as the last parameter instead of 'line_input'. The result is that output did not contain the substring in error, instead just an empty string. Fixed all of those as well. There are a lot of file, and very mind numbing work, so tried to keep it to a pattern to avoid mistakes. Change-Id: I8902f0c32a47dd7fb3bb3471a89818571702f1d2 Signed-off-by: Billy McFall <bmcfall@redhat.com> Signed-off-by: Dave Barach <dave@barachs.net>
Diffstat (limited to 'src/plugins/lb/cli.c')
-rw-r--r--src/plugins/lb/cli.c99
1 files changed, 62 insertions, 37 deletions
diff --git a/src/plugins/lb/cli.c b/src/plugins/lb/cli.c
index b59c6426241..6452a87563e 100644
--- a/src/plugins/lb/cli.c
+++ b/src/plugins/lb/cli.c
@@ -28,13 +28,16 @@ lb_vip_command_fn (vlib_main_t * vm,
int ret;
u32 gre4 = 0;
lb_vip_type_t type;
+ clib_error_t *error = 0;
if (!unformat_user (input, unformat_line_input, line_input))
return 0;
- if (!unformat(line_input, "%U", unformat_ip46_prefix, &prefix, &plen, IP46_TYPE_ANY, &plen))
- return clib_error_return (0, "invalid vip prefix: '%U'",
- format_unformat_error, line_input);
+ if (!unformat(line_input, "%U", unformat_ip46_prefix, &prefix, &plen, IP46_TYPE_ANY, &plen)) {
+ error = clib_error_return (0, "invalid vip prefix: '%U'",
+ format_unformat_error, line_input);
+ goto done;
+ }
while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
{
@@ -46,13 +49,13 @@ lb_vip_command_fn (vlib_main_t * vm,
gre4 = 1;
else if (unformat(line_input, "encap gre6"))
gre4 = 0;
- else
- return clib_error_return (0, "parse error: '%U'",
- format_unformat_error, line_input);
+ else {
+ error = clib_error_return (0, "parse error: '%U'",
+ format_unformat_error, line_input);
+ goto done;
+ }
}
- unformat_free (line_input);
-
if (ip46_prefix_is_ip4(&prefix, plen)) {
type = (gre4)?LB_VIP_TYPE_IP4_GRE4:LB_VIP_TYPE_IP4_GRE6;
@@ -65,17 +68,25 @@ lb_vip_command_fn (vlib_main_t * vm,
u32 index;
if (!del) {
if ((ret = lb_vip_add(&prefix, plen, type, new_len, &index))) {
- return clib_error_return (0, "lb_vip_add error %d", ret);
+ error = clib_error_return (0, "lb_vip_add error %d", ret);
+ goto done;
} else {
vlib_cli_output(vm, "lb_vip_add ok %d", index);
}
} else {
- if ((ret = lb_vip_find_index(&prefix, plen, &index)))
- return clib_error_return (0, "lb_vip_find_index error %d", ret);
- else if ((ret = lb_vip_del(index)))
- return clib_error_return (0, "lb_vip_del error %d", ret);
+ if ((ret = lb_vip_find_index(&prefix, plen, &index))) {
+ error = clib_error_return (0, "lb_vip_find_index error %d", ret);
+ goto done;
+ } else if ((ret = lb_vip_del(index))) {
+ error = clib_error_return (0, "lb_vip_del error %d", ret);
+ goto done;
+ }
}
- return NULL;
+
+done:
+ unformat_free (line_input);
+
+ return error;
}
VLIB_CLI_COMMAND (lb_vip_command, static) =
@@ -96,16 +107,21 @@ lb_as_command_fn (vlib_main_t * vm,
u32 vip_index;
u8 del = 0;
int ret;
+ clib_error_t *error = 0;
if (!unformat_user (input, unformat_line_input, line_input))
return 0;
- if (!unformat(line_input, "%U", unformat_ip46_prefix, &vip_prefix, &vip_plen, IP46_TYPE_ANY))
- return clib_error_return (0, "invalid as address: '%U'",
- format_unformat_error, line_input);
+ if (!unformat(line_input, "%U", unformat_ip46_prefix, &vip_prefix, &vip_plen, IP46_TYPE_ANY)) {
+ error = clib_error_return (0, "invalid as address: '%U'",
+ format_unformat_error, line_input);
+ goto done;
+ }
- if ((ret = lb_vip_find_index(&vip_prefix, vip_plen, &vip_index)))
- return clib_error_return (0, "lb_vip_find_index error %d", ret);
+ if ((ret = lb_vip_find_index(&vip_prefix, vip_plen, &vip_index))) {
+ error = clib_error_return (0, "lb_vip_find_index error %d", ret);
+ goto done;
+ }
while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
{
@@ -114,15 +130,15 @@ lb_as_command_fn (vlib_main_t * vm,
} else if (unformat(line_input, "del")) {
del = 1;
} else {
- vec_free(as_array);
- return clib_error_return (0, "parse error: '%U'",
- format_unformat_error, line_input);
+ error = clib_error_return (0, "parse error: '%U'",
+ format_unformat_error, line_input);
+ goto done;
}
}
if (!vec_len(as_array)) {
- vec_free(as_array);
- return clib_error_return (0, "No AS address provided");
+ error = clib_error_return (0, "No AS address provided");
+ goto done;
}
lb_garbage_collection();
@@ -130,18 +146,21 @@ lb_as_command_fn (vlib_main_t * vm,
if (del) {
if ((ret = lb_vip_del_ass(vip_index, as_array, vec_len(as_array)))) {
- vec_free(as_array);
- return clib_error_return (0, "lb_vip_del_ass error %d", ret);
+ error = clib_error_return (0, "lb_vip_del_ass error %d", ret);
+ goto done;
}
} else {
if ((ret = lb_vip_add_ass(vip_index, as_array, vec_len(as_array)))) {
- vec_free(as_array);
- return clib_error_return (0, "lb_vip_add_ass error %d", ret);
+ error = clib_error_return (0, "lb_vip_add_ass error %d", ret);
+ goto done;
}
}
+done:
+ unformat_free (line_input);
vec_free(as_array);
- return 0;
+
+ return error;
}
VLIB_CLI_COMMAND (lb_as_command, static) =
@@ -163,6 +182,7 @@ lb_conf_command_fn (vlib_main_t * vm,
u32 per_cpu_sticky_buckets_log2 = 0;
u32 flow_timeout = lbm->flow_timeout;
int ret;
+ clib_error_t *error = 0;
if (!unformat_user (input, unformat_line_input, line_input))
return 0;
@@ -181,19 +201,24 @@ lb_conf_command_fn (vlib_main_t * vm,
per_cpu_sticky_buckets = 1 << per_cpu_sticky_buckets_log2;
} else if (unformat(line_input, "timeout %d", &flow_timeout))
;
- else
- return clib_error_return (0, "parse error: '%U'",
- format_unformat_error, line_input);
+ else {
+ error = clib_error_return (0, "parse error: '%U'",
+ format_unformat_error, line_input);
+ goto done;
+ }
}
- unformat_free (line_input);
-
lb_garbage_collection();
- if ((ret = lb_conf(&ip4, &ip6, per_cpu_sticky_buckets, flow_timeout)))
- return clib_error_return (0, "lb_conf error %d", ret);
+ if ((ret = lb_conf(&ip4, &ip6, per_cpu_sticky_buckets, flow_timeout))) {
+ error = clib_error_return (0, "lb_conf error %d", ret);
+ goto done;
+ }
- return NULL;
+done:
+ unformat_free (line_input);
+
+ return error;
}
VLIB_CLI_COMMAND (lb_conf_command, static) =