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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/pg
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/pg')
-rw-r--r--src/vnet/pg/cli.c39
1 files changed, 29 insertions, 10 deletions
diff --git a/src/vnet/pg/cli.c b/src/vnet/pg/cli.c
index f5896b4326e..3c249a7b5f1 100644
--- a/src/vnet/pg/cli.c
+++ b/src/vnet/pg/cli.c
@@ -547,21 +547,30 @@ pg_capture_cmd_fn (vlib_main_t * vm,
else
{
error = clib_error_create ("unknown input `%U'",
- format_unformat_error, input);
- return error;
+ format_unformat_error, line_input);
+ goto done;
}
}
if (!hi)
- return clib_error_return (0, "Please specify interface name");
+ {
+ error = clib_error_return (0, "Please specify interface name");
+ goto done;
+ }
if (hi->dev_class_index != pg_dev_class.index)
- return clib_error_return (0, "Please specify packet-generator interface");
+ {
+ error =
+ clib_error_return (0, "Please specify packet-generator interface");
+ goto done;
+ }
if (!pcap_file_name && is_disable == 0)
- return clib_error_return (0, "Please specify pcap file name");
+ {
+ error = clib_error_return (0, "Please specify pcap file name");
+ goto done;
+ }
- unformat_free (line_input);
pg_capture_args_t _a, *a = &_a;
@@ -572,6 +581,10 @@ pg_capture_cmd_fn (vlib_main_t * vm,
a->count = count;
error = pg_capture (a);
+
+done:
+ unformat_free (line_input);
+
return error;
}
@@ -590,6 +603,7 @@ create_pg_if_cmd_fn (vlib_main_t * vm,
pg_main_t *pg = &pg_main;
unformat_input_t _line_input, *line_input = &_line_input;
u32 if_id;
+ clib_error_t *error = NULL;
if (!unformat_user (input, unformat_line_input, line_input))
return 0;
@@ -600,14 +614,19 @@ create_pg_if_cmd_fn (vlib_main_t * vm,
;
else
- return clib_error_create ("unknown input `%U'",
- format_unformat_error, input);
+ {
+ error = clib_error_create ("unknown input `%U'",
+ format_unformat_error, line_input);
+ goto done;
+ }
}
+ pg_interface_add_or_get (pg, if_id);
+
+done:
unformat_free (line_input);
- pg_interface_add_or_get (pg, if_id);
- return 0;
+ return error;
}
/* *INDENT-OFF* */