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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/vnet/gre
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/vnet/gre')
-rw-r--r--src/vnet/gre/interface.c35
1 files changed, 25 insertions, 10 deletions
diff --git a/src/vnet/gre/interface.c b/src/vnet/gre/interface.c
index d624587d8e9..d4476ac4682 100644
--- a/src/vnet/gre/interface.c
+++ b/src/vnet/gre/interface.c
@@ -491,6 +491,7 @@ create_gre_tunnel_command_fn (vlib_main_t * vm,
u32 num_m_args = 0;
u8 is_add = 1;
u32 sw_if_index;
+ clib_error_t *error = NULL;
/* Get a line of input. */
if (! unformat_user (input, unformat_line_input, line_input))
@@ -508,16 +509,24 @@ create_gre_tunnel_command_fn (vlib_main_t * vm,
else if (unformat (line_input, "teb"))
teb = 1;
else
- return clib_error_return (0, "unknown input `%U'",
- format_unformat_error, input);
+ {
+ error = clib_error_return (0, "unknown input `%U'",
+ format_unformat_error, line_input);
+ goto done;
+ }
}
- unformat_free (line_input);
if (num_m_args < 2)
- return clib_error_return (0, "mandatory argument(s) missing");
+ {
+ error = clib_error_return (0, "mandatory argument(s) missing");
+ goto done;
+ }
if (memcmp (&src, &dst, sizeof(src)) == 0)
- return clib_error_return (0, "src and dst are identical");
+ {
+ error = clib_error_return (0, "src and dst are identical");
+ goto done;
+ }
memset (a, 0, sizeof (*a));
a->outer_fib_id = outer_fib_id;
@@ -536,15 +545,21 @@ create_gre_tunnel_command_fn (vlib_main_t * vm,
vlib_cli_output(vm, "%U\n", format_vnet_sw_if_index_name, vnet_get_main(), sw_if_index);
break;
case VNET_API_ERROR_INVALID_VALUE:
- return clib_error_return (0, "GRE tunnel already exists...");
+ error = clib_error_return (0, "GRE tunnel already exists...");
+ goto done;
case VNET_API_ERROR_NO_SUCH_FIB:
- return clib_error_return (0, "outer fib ID %d doesn't exist\n",
- outer_fib_id);
+ error = clib_error_return (0, "outer fib ID %d doesn't exist\n",
+ outer_fib_id);
+ goto done;
default:
- return clib_error_return (0, "vnet_gre_add_del_tunnel returned %d", rv);
+ error = clib_error_return (0, "vnet_gre_add_del_tunnel returned %d", rv);
+ goto done;
}
- return 0;
+done:
+ unformat_free (line_input);
+
+ return error;
}
VLIB_CLI_COMMAND (create_gre_tunnel_command, static) = {