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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/l2/l2_xcrw.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/l2/l2_xcrw.c')
-rw-r--r--src/vnet/l2/l2_xcrw.c34
1 files changed, 25 insertions, 9 deletions
diff --git a/src/vnet/l2/l2_xcrw.c b/src/vnet/l2/l2_xcrw.c
index 70610a853d3..d08a5d8f8e8 100644
--- a/src/vnet/l2/l2_xcrw.c
+++ b/src/vnet/l2/l2_xcrw.c
@@ -409,6 +409,7 @@ set_l2_xcrw_command_fn (vlib_main_t * vm,
u8 *rw = 0;
vnet_main_t *vnm = vnet_get_main ();
int rv;
+ clib_error_t *error = NULL;
if (!unformat_user (input, unformat_line_input, line_input))
@@ -416,8 +417,11 @@ set_l2_xcrw_command_fn (vlib_main_t * vm,
if (!unformat (line_input, "%U",
unformat_vnet_sw_interface, vnm, &l2_sw_if_index))
- 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;
+ }
while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
{
@@ -436,7 +440,10 @@ set_l2_xcrw_command_fn (vlib_main_t * vm,
}
if (next_node_index == ~0)
- return clib_error_return (0, "next node not specified");
+ {
+ error = clib_error_return (0, "next node not specified");
+ goto done;
+ }
if (tx_fib_id != ~0)
{
@@ -448,7 +455,11 @@ set_l2_xcrw_command_fn (vlib_main_t * vm,
p = hash_get (ip4_main.fib_index_by_table_id, tx_fib_id);
if (p == 0)
- return clib_error_return (0, "nonexistent tx_fib_id %d", tx_fib_id);
+ {
+ error =
+ clib_error_return (0, "nonexistent tx_fib_id %d", tx_fib_id);
+ goto done;
+ }
tx_fib_index = p[0];
}
@@ -463,16 +474,21 @@ set_l2_xcrw_command_fn (vlib_main_t * vm,
break;
case VNET_API_ERROR_INVALID_SW_IF_INDEX:
- return clib_error_return (0, "%U not cross-connected",
- format_vnet_sw_if_index_name,
- vnm, l2_sw_if_index);
+ error = clib_error_return (0, "%U not cross-connected",
+ format_vnet_sw_if_index_name,
+ vnm, l2_sw_if_index);
+ goto done;
+
default:
- return clib_error_return (0, "vnet_configure_l2_xcrw returned %d", rv);
+ error = clib_error_return (0, "vnet_configure_l2_xcrw returned %d", rv);
+ goto done;
}
+done:
vec_free (rw);
+ unformat_free (line_input);
- return 0;
+ return error;
}
/*?