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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/devices/af_packet
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/devices/af_packet')
-rw-r--r--src/vnet/devices/af_packet/cli.c56
1 files changed, 42 insertions, 14 deletions
diff --git a/src/vnet/devices/af_packet/cli.c b/src/vnet/devices/af_packet/cli.c
index 6baa26e1720..d4aa7016aaa 100644
--- a/src/vnet/devices/af_packet/cli.c
+++ b/src/vnet/devices/af_packet/cli.c
@@ -49,6 +49,7 @@ af_packet_create_command_fn (vlib_main_t * vm, unformat_input_t * input,
u8 *hw_addr_ptr = 0;
u32 sw_if_index;
int r;
+ clib_error_t *error = NULL;
/* Get a line of input. */
if (!unformat_user (input, unformat_line_input, line_input))
@@ -63,29 +64,47 @@ af_packet_create_command_fn (vlib_main_t * vm, unformat_input_t * input,
(line_input, "hw-addr %U", unformat_ethernet_address, hwaddr))
hw_addr_ptr = hwaddr;
else
- return clib_error_return (0, "unknown input `%U'",
- format_unformat_error, input);
+ {
+ error = clib_error_return (0, "unknown input `%U'",
+ format_unformat_error, line_input);
+ goto done;
+ }
}
- unformat_free (line_input);
if (host_if_name == NULL)
- return clib_error_return (0, "missing host interface name");
+ {
+ error = clib_error_return (0, "missing host interface name");
+ goto done;
+ }
r = af_packet_create_if (vm, host_if_name, hw_addr_ptr, &sw_if_index);
- vec_free (host_if_name);
if (r == VNET_API_ERROR_SYSCALL_ERROR_1)
- return clib_error_return (0, "%s (errno %d)", strerror (errno), errno);
+ {
+ error = clib_error_return (0, "%s (errno %d)", strerror (errno), errno);
+ goto done;
+ }
if (r == VNET_API_ERROR_INVALID_INTERFACE)
- return clib_error_return (0, "Invalid interface name");
+ {
+ error = clib_error_return (0, "Invalid interface name");
+ goto done;
+ }
if (r == VNET_API_ERROR_SUBIF_ALREADY_EXISTS)
- return clib_error_return (0, "Interface elready exists");
+ {
+ error = clib_error_return (0, "Interface elready exists");
+ goto done;
+ }
vlib_cli_output (vm, "%U\n", format_vnet_sw_if_index_name, vnet_get_main (),
sw_if_index);
- return 0;
+
+done:
+ vec_free (host_if_name);
+ unformat_free (line_input);
+
+ return error;
}
/*?
@@ -124,6 +143,7 @@ af_packet_delete_command_fn (vlib_main_t * vm, unformat_input_t * input,
{
unformat_input_t _line_input, *line_input = &_line_input;
u8 *host_if_name = NULL;
+ clib_error_t *error = NULL;
/* Get a line of input. */
if (!unformat_user (input, unformat_line_input, line_input))
@@ -134,18 +154,26 @@ af_packet_delete_command_fn (vlib_main_t * vm, unformat_input_t * input,
if (unformat (line_input, "name %s", &host_if_name))
;
else
- return clib_error_return (0, "unknown input `%U'",
- format_unformat_error, input);
+ {
+ error = clib_error_return (0, "unknown input `%U'",
+ format_unformat_error, line_input);
+ goto done;
+ }
}
- unformat_free (line_input);
if (host_if_name == NULL)
- return clib_error_return (0, "missing host interface name");
+ {
+ error = clib_error_return (0, "missing host interface name");
+ goto done;
+ }
af_packet_delete_if (vm, host_if_name);
+
+done:
vec_free (host_if_name);
+ unformat_free (line_input);
- return 0;
+ return error;
}
/*?