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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/l2tp/l2tp.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/l2tp/l2tp.c')
-rw-r--r--src/vnet/l2tp/l2tp.c39
1 files changed, 28 insertions, 11 deletions
diff --git a/src/vnet/l2tp/l2tp.c b/src/vnet/l2tp/l2tp.c
index a4531dab85c..2d3233972a8 100644
--- a/src/vnet/l2tp/l2tp.c
+++ b/src/vnet/l2tp/l2tp.c
@@ -427,6 +427,7 @@ create_l2tpv3_tunnel_command_fn (vlib_main_t * vm,
u32 sw_if_index;
u32 encap_fib_id = ~0;
u32 encap_fib_index = ~0;
+ clib_error_t *error = NULL;
/* Get a line of input. */
if (!unformat_user (input, unformat_line_input, line_input))
@@ -455,18 +456,22 @@ create_l2tpv3_tunnel_command_fn (vlib_main_t * vm,
else if (unformat (line_input, "l2-sublayer-present"))
l2_sublayer_present = 1;
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;
+ }
}
- unformat_free (line_input);
-
if (encap_fib_id != ~0)
{
uword *p;
ip6_main_t *im = &ip6_main;
if (!(p = hash_get (im->fib_index_by_table_id, encap_fib_id)))
- return clib_error_return (0, "No fib with id %d", encap_fib_id);
+ {
+ error = clib_error_return (0, "No fib with id %d", encap_fib_id);
+ goto done;
+ }
encap_fib_index = p[0];
}
else
@@ -475,9 +480,15 @@ create_l2tpv3_tunnel_command_fn (vlib_main_t * vm,
}
if (our_address_set == 0)
- return clib_error_return (0, "our address not specified");
+ {
+ error = clib_error_return (0, "our address not specified");
+ goto done;
+ }
if (client_address_set == 0)
- return clib_error_return (0, "client address not specified");
+ {
+ error = clib_error_return (0, "client address not specified");
+ goto done;
+ }
rv = create_l2tpv3_ipv6_tunnel (lm, &client_address, &our_address,
local_session_id, remote_session_id,
@@ -491,16 +502,22 @@ create_l2tpv3_tunnel_command_fn (vlib_main_t * vm,
vnet_get_main (), sw_if_index);
break;
case VNET_API_ERROR_INVALID_VALUE:
- return clib_error_return (0, "session already exists...");
+ error = clib_error_return (0, "session already exists...");
+ goto done;
case VNET_API_ERROR_NO_SUCH_ENTRY:
- return clib_error_return (0, "session does not exist...");
+ error = clib_error_return (0, "session does not exist...");
+ goto done;
default:
- return clib_error_return (0, "l2tp_session_add_del returned %d", rv);
+ error = clib_error_return (0, "l2tp_session_add_del returned %d", rv);
+ goto done;
}
- return 0;
+done:
+ unformat_free (line_input);
+
+ return error;
}
/* *INDENT-OFF* */