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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/ip/ip6_neighbor.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/vnet/ip/ip6_neighbor.c')
-rw-r--r--src/vnet/ip/ip6_neighbor.c27
1 files changed, 21 insertions, 6 deletions
diff --git a/src/vnet/ip/ip6_neighbor.c b/src/vnet/ip/ip6_neighbor.c
index 7229591e683..6b53137ffb2 100644
--- a/src/vnet/ip/ip6_neighbor.c
+++ b/src/vnet/ip/ip6_neighbor.c
@@ -2923,7 +2923,10 @@ ip6_neighbor_cmd (vlib_main_t * vm, unformat_input_t * main_input,
else if (unformat (line_input, "ra-lifetime"))
{
if (!unformat (line_input, "%d", &ra_lifetime))
- return (error = unformat_parse_error (line_input));
+ {
+ error = unformat_parse_error (line_input);
+ goto done;
+ }
use_lifetime = 1;
break;
}
@@ -2931,13 +2934,19 @@ ip6_neighbor_cmd (vlib_main_t * vm, unformat_input_t * main_input,
{
if (!unformat
(line_input, "%d %d", &ra_initial_count, &ra_initial_interval))
- return (error = unformat_parse_error (line_input));
+ {
+ error = unformat_parse_error (line_input);
+ goto done;
+ }
break;
}
else if (unformat (line_input, "ra-interval"))
{
if (!unformat (line_input, "%d", &ra_max_interval))
- return (error = unformat_parse_error (line_input));
+ {
+ error = unformat_parse_error (line_input);
+ goto done;
+ }
if (!unformat (line_input, "%d", &ra_min_interval))
ra_min_interval = 0;
@@ -2949,7 +2958,10 @@ ip6_neighbor_cmd (vlib_main_t * vm, unformat_input_t * main_input,
break;
}
else
- return (unformat_parse_error (line_input));
+ {
+ error = unformat_parse_error (line_input);
+ goto done;
+ }
}
if (add_radv_info)
@@ -3006,7 +3018,10 @@ ip6_neighbor_cmd (vlib_main_t * vm, unformat_input_t * main_input,
else if (unformat (line_input, "no-onlink"))
no_onlink = 1;
else
- return (unformat_parse_error (line_input));
+ {
+ error = unformat_parse_error (line_input);
+ goto done;
+ }
}
ip6_neighbor_ra_prefix (vm, sw_if_index,
@@ -3018,9 +3033,9 @@ ip6_neighbor_cmd (vlib_main_t * vm, unformat_input_t * main_input,
off_link, no_autoconfig, no_onlink, is_no);
}
+done:
unformat_free (line_input);
-done:
return error;
}