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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/lookup.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/lookup.c')
-rw-r--r--src/vnet/ip/lookup.c34
1 files changed, 23 insertions, 11 deletions
diff --git a/src/vnet/ip/lookup.c b/src/vnet/ip/lookup.c
index 0ef0e7a6deb..807b87b6037 100644
--- a/src/vnet/ip/lookup.c
+++ b/src/vnet/ip/lookup.c
@@ -568,8 +568,6 @@ vnet_ip_route_cmd (vlib_main_t * vm,
}
}
- unformat_free (line_input);
-
if (vec_len (prefixs) == 0)
{
error =
@@ -704,6 +702,7 @@ done:
vec_free (dpos);
vec_free (prefixs);
vec_free (rpaths);
+ unformat_free (line_input);
return error;
}
@@ -872,8 +871,6 @@ vnet_ip_mroute_cmd (vlib_main_t * vm,
}
}
- unformat_free (line_input);
-
if (~0 == table_id)
{
/*
@@ -970,6 +967,8 @@ vnet_ip_mroute_cmd (vlib_main_t * vm,
(scount * gcount) / (timet[1] - timet[0]));
done:
+ unformat_free (line_input);
+
return error;
}
@@ -1149,24 +1148,37 @@ probe_neighbor_address (vlib_main_t * vm,
is_ip4 = 0;
}
else
- return clib_error_return (0, "unknown input '%U'",
- format_unformat_error, line_input);
+ {
+ error = clib_error_return (0, "unknown input '%U'",
+ format_unformat_error, line_input);
+ goto done;
+ }
}
- unformat_free (line_input);
-
if (sw_if_index == ~0)
- return clib_error_return (0, "Interface required, not set.");
+ {
+ error = clib_error_return (0, "Interface required, not set.");
+ goto done;
+ }
if (address_set == 0)
- return clib_error_return (0, "ip address required, not set.");
+ {
+ error = clib_error_return (0, "ip address required, not set.");
+ goto done;
+ }
if (address_set > 1)
- return clib_error_return (0, "Multiple ip addresses not supported.");
+ {
+ error = clib_error_return (0, "Multiple ip addresses not supported.");
+ goto done;
+ }
if (is_ip4)
error = ip4_probe_neighbor_wait (vm, &a4, sw_if_index, retry_count);
else
error = ip6_probe_neighbor_wait (vm, &a6, sw_if_index, retry_count);
+done:
+ unformat_free (line_input);
+
return error;
}