[PATCH v2 01/16] eal: verify strdup return value

[lihuisong (C)]

在 2023/11/10 18:01, Chengwen Feng 写道:
> Add verify strdup() return value logic.
>
> Fixes: 293c53d8b23c ("eal: add telemetry callbacks")
> Fixes: 0d0f478d0483 ("eal/linux: add uevent parse and process")
> Cc: stable at dpdk.org
>
> Signed-off-by: Chengwen Feng <fengchengwen at huawei.com>
> ---
>   lib/eal/common/eal_common_options.c | 24 ++++++++++++++++++++++--
>   lib/eal/linux/eal_dev.c             |  3 +++
>   2 files changed, 25 insertions(+), 2 deletions(-)
>
> diff --git a/lib/eal/common/eal_common_options.c b/lib/eal/common/eal_common_options.c
> index a6d21f1cba..8b5a4632dd 100644
> --- a/lib/eal/common/eal_common_options.c
> +++ b/lib/eal/common/eal_common_options.c
> @@ -226,6 +226,8 @@ eal_save_args(int argc, char **argv)
>   		if (strcmp(argv[i], "--") == 0)
>   			break;
>   		eal_args[i] = strdup(argv[i]);
> +		if (eal_args[i] == NULL)
> +			goto error;
>   	}
>   	eal_args[i++] = NULL; /* always finish with NULL */
>   
> @@ -235,13 +237,31 @@ eal_save_args(int argc, char **argv)
>   
>   	eal_app_args = calloc(argc - i + 1, sizeof(*eal_args));
>   	if (eal_app_args == NULL)
> -		return -1;
> +		goto error;
>   
> -	for (j = 0; i < argc; j++, i++)
> +	for (j = 0; i < argc; j++, i++) {
>   		eal_app_args[j] = strdup(argv[i]);
> +		if (eal_app_args[j] == NULL)
> +			goto error;
> +	}
>   	eal_app_args[j] = NULL;
>   
>   	return 0;
> +
> +error:
> +	if (eal_app_args != NULL) {
> +		i = 0;
> +		while (eal_app_args[i] != NULL)
> +			free(eal_app_args[i++]);
> +		free(eal_app_args);
> +		eal_app_args = NULL;
> +	}
> +	i = 0;
> +	while (eal_args[i] != NULL)
> +		free(eal_args[i++]);
> +	free(eal_args);
> +	eal_args = NULL;
> +	return -1;
>   }
>   #endif
>   
> diff --git a/lib/eal/linux/eal_dev.c b/lib/eal/linux/eal_dev.c
> index ac76f6174d..df3cd6b39a 100644
> --- a/lib/eal/linux/eal_dev.c
> +++ b/lib/eal/linux/eal_dev.c
> @@ -181,7 +181,10 @@ dev_uev_parse(const char *buf, struct rte_dev_event *event, int length)
>   			buf += 14;
>   			i += 14;
>   			strlcpy(pci_slot_name, buf, sizeof(subsystem));
> +			free(event->devname);
It seems that above free for devname is unnecessary.
>   			event->devname = strdup(pci_slot_name);
> +			if (event->devname == NULL)
> +				return -1;
>   		}
>   		for (; i < length; i++) {
>   			if (*buf == '\0')