net/enic: fix possible uninitialized variable
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Commit Message
The uninitialized field 'extra_flag' of hash parameter may enable
certain feature silently. Typically, if bit0 of 'extra_flag' set, the
hardware transactional memory support will be enabled unexpectedly.
Signed-off-by: Haiyang Tan <haiyangtan@tencent.com>
---
drivers/net/enic/enic_clsf.c | 17 +++++++++--------
1 file changed, 9 insertions(+), 8 deletions(-)
Comments
On 12/22/2018 12:41 PM, Haiyang Tan wrote:
> The uninitialized field 'extra_flag' of hash parameter may enable
> certain feature silently. Typically, if bit0 of 'extra_flag' set, the
> hardware transactional memory support will be enabled unexpectedly.
>
> Signed-off-by: Haiyang Tan <haiyangtan@tencent.com>
> ---
> drivers/net/enic/enic_clsf.c | 17 +++++++++--------
> 1 file changed, 9 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/net/enic/enic_clsf.c b/drivers/net/enic/enic_clsf.c
> index 9d95201ec..f9707c78f 100644
> --- a/drivers/net/enic/enic_clsf.c
> +++ b/drivers/net/enic/enic_clsf.c
> @@ -475,14 +475,15 @@ void enic_clsf_destroy(struct enic *enic)
> int enic_clsf_init(struct enic *enic)
> {
> char clsf_name[RTE_HASH_NAMESIZE];
> - struct rte_hash_parameters hash_params = {
> - .name = clsf_name,
> - .entries = ENICPMD_CLSF_HASH_ENTRIES,
> - .key_len = sizeof(struct rte_eth_fdir_filter),
> - .hash_func = DEFAULT_HASH_FUNC,
> - .hash_func_init_val = 0,
> - .socket_id = SOCKET_ID_ANY,
> - };
> + struct rte_hash_parameters hash_params = { 0 };
> +
> + hash_params.name = clsf_name;
> + hash_params.entries = ENICPMD_CLSF_HASH_ENTRIES;
> + hash_params.key_len = sizeof(struct rte_eth_fdir_filter);
> + hash_params.hash_func = DEFAULT_HASH_FUNC;
> + hash_params.hash_func_init_val = 0;
> + hash_params.socket_id = SOCKET_ID_ANY;
Both code should be doing same thing, since unassigned values are set to 0 by
default, and 'extra_flag' should be already set to zero with old code.
There are a few patches for same thing, I am updating all as 'Rejected', please
shout if I am missing something here.
@@ -475,14 +475,15 @@ void enic_clsf_destroy(struct enic *enic)
int enic_clsf_init(struct enic *enic)
{
char clsf_name[RTE_HASH_NAMESIZE];
- struct rte_hash_parameters hash_params = {
- .name = clsf_name,
- .entries = ENICPMD_CLSF_HASH_ENTRIES,
- .key_len = sizeof(struct rte_eth_fdir_filter),
- .hash_func = DEFAULT_HASH_FUNC,
- .hash_func_init_val = 0,
- .socket_id = SOCKET_ID_ANY,
- };
+ struct rte_hash_parameters hash_params = { 0 };
+
+ hash_params.name = clsf_name;
+ hash_params.entries = ENICPMD_CLSF_HASH_ENTRIES;
+ hash_params.key_len = sizeof(struct rte_eth_fdir_filter);
+ hash_params.hash_func = DEFAULT_HASH_FUNC;
+ hash_params.hash_func_init_val = 0;
+ hash_params.socket_id = SOCKET_ID_ANY;
+
snprintf(clsf_name, RTE_HASH_NAMESIZE, "enic_clsf_%s", enic->bdf_name);
enic->fdir.hash = rte_hash_create(&hash_params);
memset(&enic->fdir.stats, 0, sizeof(enic->fdir.stats));