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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 /build-root/emacs-lisp/tunnel-c-skel.el
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 'build-root/emacs-lisp/tunnel-c-skel.el')
-rw-r--r--build-root/emacs-lisp/tunnel-c-skel.el19
1 files changed, 15 insertions, 4 deletions
diff --git a/build-root/emacs-lisp/tunnel-c-skel.el b/build-root/emacs-lisp/tunnel-c-skel.el
index aa260e53333..a1b1757dab7 100644
--- a/build-root/emacs-lisp/tunnel-c-skel.el
+++ b/build-root/emacs-lisp/tunnel-c-skel.el
@@ -288,6 +288,7 @@ static clib_error_t *
vlib_cli_command_t * cmd)
{
unformat_input_t _line_input, * line_input = &_line_input;
+ clib_error_t *error = 0;
ip4_address_t src, dst;
u8 is_add = 1;
u8 src_set = 0;
@@ -322,13 +323,19 @@ static clib_error_t *
{
encap_fib_index = fib_index_from_fib_id (tmp);
if (encap_fib_index == ~0)
- return clib_error_return (0, \"nonexistent encap fib id %d\", tmp);
+ {
+ unformat_free (line_input);
+ return clib_error_return (0, \"nonexistent encap fib id %d\", tmp);
+ }
}
else if (unformat (line_input, \"decap-vrf-id %d\", &tmp))
{
decap_fib_index = fib_index_from_fib_id (tmp);
if (decap_fib_index == ~0)
- return clib_error_return (0, \"nonexistent decap fib id %d\", tmp);
+ {
+ unformat_free (line_input);
+ return clib_error_return (0, \"nonexistent decap fib id %d\", tmp);
+ }
}
else if (unformat (line_input, \"decap-next %U\", unformat_decap_next,
&decap_next_index))
@@ -346,8 +353,12 @@ static clib_error_t *
* in the " ENCAP_STACK " header
*/
else
- 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);
+ unformat_free (line_input);
+ return error;
+ }
}
unformat_free (line_input);