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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/lisp-gpe
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/lisp-gpe')
-rw-r--r--src/vnet/lisp-gpe/interface.c58
-rw-r--r--src/vnet/lisp-gpe/lisp_gpe.c13
2 files changed, 58 insertions, 13 deletions
diff --git a/src/vnet/lisp-gpe/interface.c b/src/vnet/lisp-gpe/interface.c
index 2142e095119..19ac22e7a56 100644
--- a/src/vnet/lisp-gpe/interface.c
+++ b/src/vnet/lisp-gpe/interface.c
@@ -794,6 +794,7 @@ lisp_gpe_add_del_iface_command_fn (vlib_main_t * vm, unformat_input_t * input,
u32 table_id, vni, bd_id;
u8 vni_is_set = 0, vrf_is_set = 0, bd_index_is_set = 0;
u8 nsh_iface = 0;
+ clib_error_t *error = NULL;
if (vnet_lisp_gpe_enable_disable_status () == 0)
{
@@ -828,8 +829,9 @@ lisp_gpe_add_del_iface_command_fn (vlib_main_t * vm, unformat_input_t * input,
}
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);
+ goto done;
}
}
@@ -839,7 +841,8 @@ lisp_gpe_add_del_iface_command_fn (vlib_main_t * vm, unformat_input_t * input,
{
if (~0 == lisp_gpe_add_nsh_iface (&lisp_gpe_main))
{
- return clib_error_return (0, "NSH interface not created");
+ error = clib_error_return (0, "NSH interface not created");
+ goto done;
}
}
else
@@ -850,21 +853,34 @@ lisp_gpe_add_del_iface_command_fn (vlib_main_t * vm, unformat_input_t * input,
}
if (vrf_is_set && bd_index_is_set)
- return clib_error_return (0,
- "Cannot set both vrf and brdige domain index!");
+ {
+ error = clib_error_return
+ (0, "Cannot set both vrf and brdige domain index!");
+ goto done;
+ }
if (!vni_is_set)
- return clib_error_return (0, "vni must be set!");
+ {
+ error = clib_error_return (0, "vni must be set!");
+ goto done;
+ }
if (!vrf_is_set && !bd_index_is_set)
- return clib_error_return (0, "vrf or bridge domain index must be set!");
+ {
+ error =
+ clib_error_return (0, "vrf or bridge domain index must be set!");
+ goto done;
+ }
if (bd_index_is_set)
{
if (is_add)
{
if (~0 == lisp_gpe_tenant_l2_iface_add_or_lock (vni, bd_id))
- return clib_error_return (0, "L2 interface not created");
+ {
+ error = clib_error_return (0, "L2 interface not created");
+ goto done;
+ }
}
else
lisp_gpe_tenant_l2_iface_unlock (vni);
@@ -874,13 +890,35 @@ lisp_gpe_add_del_iface_command_fn (vlib_main_t * vm, unformat_input_t * input,
if (is_add)
{
if (~0 == lisp_gpe_tenant_l3_iface_add_or_lock (vni, table_id))
- return clib_error_return (0, "L3 interface not created");
+ {
+ error = clib_error_return (0, "L3 interface not created");
+ goto done;
+ }
}
else
lisp_gpe_tenant_l3_iface_unlock (vni);
}
- return (NULL);
+ if (nsh_iface)
+ {
+ if (is_add)
+ {
+ if (~0 == lisp_gpe_add_nsh_iface (&lisp_gpe_main))
+ {
+ error = clib_error_return (0, "NSH interface not created");
+ goto done;
+ }
+ else
+ {
+ lisp_gpe_del_nsh_iface (&lisp_gpe_main);
+ }
+ }
+ }
+
+done:
+ unformat_free (line_input);
+
+ return error;
}
/* *INDENT-OFF* */
diff --git a/src/vnet/lisp-gpe/lisp_gpe.c b/src/vnet/lisp-gpe/lisp_gpe.c
index 1f8afdaefb8..f2fbcbd5b2b 100644
--- a/src/vnet/lisp-gpe/lisp_gpe.c
+++ b/src/vnet/lisp-gpe/lisp_gpe.c
@@ -218,6 +218,7 @@ lisp_gpe_enable_disable_command_fn (vlib_main_t * vm,
unformat_input_t _line_input, *line_input = &_line_input;
u8 is_en = 1;
vnet_lisp_gpe_enable_disable_args_t _a, *a = &_a;
+ clib_error_t *error = NULL;
/* Get a line of input. */
if (!unformat_user (input, unformat_line_input, line_input))
@@ -231,12 +232,18 @@ lisp_gpe_enable_disable_command_fn (vlib_main_t * vm,
is_en = 0;
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);
+ goto done;
}
}
a->is_en = is_en;
- return vnet_lisp_gpe_enable_disable (a);
+ error = vnet_lisp_gpe_enable_disable (a);
+
+done:
+ unformat_free (line_input);
+
+ return error;
}
/* *INDENT-OFF* */