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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/unix/tapcli.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/unix/tapcli.c')
-rw-r--r--src/vnet/unix/tapcli.c57
1 files changed, 40 insertions, 17 deletions
diff --git a/src/vnet/unix/tapcli.c b/src/vnet/unix/tapcli.c
index 48e81b5070e..25c930c6bfe 100644
--- a/src/vnet/unix/tapcli.c
+++ b/src/vnet/unix/tapcli.c
@@ -1308,6 +1308,7 @@ tap_connect_command_fn (vlib_main_t * vm,
int ip6_address_set = 0;
u32 ip4_mask_width = 0;
u32 ip6_mask_width = 0;
+ clib_error_t *error = NULL;
if (tm->is_disabled)
return clib_error_return (0, "device disabled...");
@@ -1336,12 +1337,18 @@ tap_connect_command_fn (vlib_main_t * vm,
else if (unformat (line_input, "%s", &intfc_name))
;
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;
+ }
}
if (intfc_name == 0)
- return clib_error_return (0, "interface name must be specified");
+ {
+ error = clib_error_return (0, "interface name must be specified");
+ goto done;
+ }
memset (ap, 0, sizeof (*ap));
@@ -1367,48 +1374,64 @@ tap_connect_command_fn (vlib_main_t * vm,
switch (rv)
{
case VNET_API_ERROR_SYSCALL_ERROR_1:
- return clib_error_return (0, "Couldn't open /dev/net/tun");
+ error = clib_error_return (0, "Couldn't open /dev/net/tun");
+ goto done;
case VNET_API_ERROR_SYSCALL_ERROR_2:
- return clib_error_return (0, "Error setting flags on '%s'", intfc_name);
-
+ error = clib_error_return (0, "Error setting flags on '%s'", intfc_name);
+ goto done;
+
case VNET_API_ERROR_SYSCALL_ERROR_3:
- return clib_error_return (0, "Couldn't open provisioning socket");
+ error = clib_error_return (0, "Couldn't open provisioning socket");
+ goto done;
case VNET_API_ERROR_SYSCALL_ERROR_4:
- return clib_error_return (0, "Couldn't get if_index");
+ error = clib_error_return (0, "Couldn't get if_index");
+ goto done;
case VNET_API_ERROR_SYSCALL_ERROR_5:
- return clib_error_return (0, "Couldn't bind provisioning socket");
+ error = clib_error_return (0, "Couldn't bind provisioning socket");
+ goto done;
case VNET_API_ERROR_SYSCALL_ERROR_6:
- return clib_error_return (0, "Couldn't set device non-blocking flag");
+ error = clib_error_return (0, "Couldn't set device non-blocking flag");
+ goto done;
case VNET_API_ERROR_SYSCALL_ERROR_7:
- return clib_error_return (0, "Couldn't set device MTU");
+ error = clib_error_return (0, "Couldn't set device MTU");
+ goto done;
case VNET_API_ERROR_SYSCALL_ERROR_8:
- return clib_error_return (0, "Couldn't get interface flags");
+ error = clib_error_return (0, "Couldn't get interface flags");
+ goto done;
case VNET_API_ERROR_SYSCALL_ERROR_9:
- return clib_error_return (0, "Couldn't set intfc admin state up");
+ error = clib_error_return (0, "Couldn't set intfc admin state up");
+ goto done;
case VNET_API_ERROR_SYSCALL_ERROR_10:
- return clib_error_return (0, "Couldn't set intfc address/mask");
+ error = clib_error_return (0, "Couldn't set intfc address/mask");
+ goto done;
case VNET_API_ERROR_INVALID_REGISTRATION:
- return clib_error_return (0, "Invalid registration");
+ error = clib_error_return (0, "Invalid registration");
+ goto done;
case 0:
break;
default:
- return clib_error_return (0, "Unknown error: %d", rv);
+ error = clib_error_return (0, "Unknown error: %d", rv);
+ goto done;
}
vlib_cli_output(vm, "%U\n", format_vnet_sw_if_index_name,
vnet_get_main(), sw_if_index);
- return 0;
+
+done:
+ unformat_free (line_input);
+
+ return error;
}
VLIB_CLI_COMMAND (tap_connect_command, static) = {