diff options
author | Billy McFall <bmcfall@redhat.com> | 2017-02-15 11:39:12 -0500 |
---|---|---|
committer | Dave Barach <openvpp@barachs.net> | 2017-02-22 16:23:12 +0000 |
commit | a9a20e7f69f4a91a4d5267ab5ce14125bdc7d6c6 (patch) | |
tree | 58647f28d51d1cac3e7aa4e9ca94280192e6ec25 /src/vnet/ipsec-gre | |
parent | 2291a36008e197423a0f0414f6dcca4afa3ac4c1 (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/ipsec-gre')
-rw-r--r-- | src/vnet/ipsec-gre/interface.c | 34 |
1 files changed, 24 insertions, 10 deletions
diff --git a/src/vnet/ipsec-gre/interface.c b/src/vnet/ipsec-gre/interface.c index 3b6e4ac261c..0772ce73df2 100644 --- a/src/vnet/ipsec-gre/interface.c +++ b/src/vnet/ipsec-gre/interface.c @@ -232,6 +232,7 @@ create_ipsec_gre_tunnel_command_fn (vlib_main_t * vm, vnet_ipsec_gre_add_del_tunnel_args_t _a, *a = &_a; int rv; u32 sw_if_index; + clib_error_t *error = NULL; /* Get a line of input. */ if (!unformat_user (input, unformat_line_input, line_input)) @@ -250,16 +251,24 @@ create_ipsec_gre_tunnel_command_fn (vlib_main_t * vm, else if (unformat (line_input, "remote-sa %d", &rsa)) num_m_args++; 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 (num_m_args < 4) - return clib_error_return (0, "mandatory argument(s) missing"); + { + error = clib_error_return (0, "mandatory argument(s) missing"); + goto done; + } if (memcmp (&src, &dst, sizeof (src)) == 0) - return clib_error_return (0, "src and dst are identical"); + { + error = clib_error_return (0, "src and dst are identical"); + goto done; + } memset (a, 0, sizeof (*a)); a->is_add = is_add; @@ -277,14 +286,19 @@ create_ipsec_gre_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, "GRE tunnel already exists..."); + error = clib_error_return (0, "GRE tunnel already exists..."); + goto done; default: - return clib_error_return (0, - "vnet_ipsec_gre_add_del_tunnel returned %d", - rv); + error = clib_error_return (0, + "vnet_ipsec_gre_add_del_tunnel returned %d", + rv); + goto done; } - return 0; +done: + unformat_free (line_input); + + return error; } /* *INDENT-OFF* */ |