[dpdk-dev,1/2] app/testpmd: fix stack overwriting by flow command
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Commit Message
The parameter type parser function stores a stack-local address in the
global parser context when parsing a "prefix" keyword.
This usually translates to "Bad arguments" errors even for correct flow
rules as stack gets overwritten by subsequent function calls.
Fixes: d3f61b7bad20 ("app/testpmd: add flow item spec prefix length")
Signed-off-by: Adrien Mazarguil <adrien.mazarguil@6wind.com>
---
app/test-pmd/cmdline_flow.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
@@ -1808,6 +1808,8 @@ parse_vc_spec(struct context *ctx, const struct token *token,
return -1;
/* Parse parameter types. */
switch (ctx->curr) {
+ static const enum index prefix[] = NEXT_ENTRY(PREFIX);
+
case ITEM_PARAM_IS:
index = 0;
objmask = 1;
@@ -1822,7 +1824,7 @@ parse_vc_spec(struct context *ctx, const struct token *token,
/* Modify next token to expect a prefix. */
if (ctx->next_num < 2)
return -1;
- ctx->next[ctx->next_num - 2] = NEXT_ENTRY(PREFIX);
+ ctx->next[ctx->next_num - 2] = prefix;
/* Fall through. */
case ITEM_PARAM_MASK:
index = 2;