[dpdk-stable] [17.11] eal: tighten permissions on shared memory files

[Yongseok Koh]

> On Jul 23, 2019, at 3:54 AM, Bruce Richardson <bruce.richardson at intel.com> wrote:
> 
> When creating files on disk, e.g. for EAL configuration or shared memory
> locks, etc., there is no need to grant any permissions on those files to
> other users. All directories are already created with 0700 permissions, so
> we should create all files with 0600 permissions.
> 
> Cc: stable at dpdk.org
> 
> Signed-off-by: Bruce Richardson <bruce.richardson at intel.com>
> ---

Applied to stable/17.11.

Bruce, did you receive my email requesting backport and then send this backport?
I can't see the mail I sent, either in my mailbox or community archive.
Looks it is being blocked or missing.
I'll have to send it out again...


Thanks,
Yongseok

> lib/librte_eal/bsdapp/eal/eal.c               | 2 +-
> lib/librte_eal/bsdapp/eal/eal_hugepage_info.c | 2 +-
> lib/librte_eal/linuxapp/eal/eal.c             | 2 +-
> lib/librte_eal/linuxapp/eal/eal_memory.c      | 2 +-
> 4 files changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/lib/librte_eal/bsdapp/eal/eal.c b/lib/librte_eal/bsdapp/eal/eal.c
> index 369a682a8..f5d8a77f6 100644
> --- a/lib/librte_eal/bsdapp/eal/eal.c
> +++ b/lib/librte_eal/bsdapp/eal/eal.c
> @@ -180,7 +180,7 @@ rte_eal_config_create(void)
> 		return;
> 
> 	if (mem_cfg_fd < 0){
> -		mem_cfg_fd = open(pathname, O_RDWR | O_CREAT, 0660);
> +		mem_cfg_fd = open(pathname, O_RDWR | O_CREAT, 0600);
> 		if (mem_cfg_fd < 0)
> 			rte_panic("Cannot open '%s' for rte_mem_config\n", pathname);
> 	}
> diff --git a/lib/librte_eal/bsdapp/eal/eal_hugepage_info.c b/lib/librte_eal/bsdapp/eal/eal_hugepage_info.c
> index 8a33c30c5..80b221071 100644
> --- a/lib/librte_eal/bsdapp/eal/eal_hugepage_info.c
> +++ b/lib/librte_eal/bsdapp/eal/eal_hugepage_info.c
> @@ -51,7 +51,7 @@ static void *
> create_shared_memory(const char *filename, const size_t mem_size)
> {
> 	void *retval;
> -	int fd = open(filename, O_CREAT | O_RDWR, 0666);
> +	int fd = open(filename, O_CREAT | O_RDWR, 0600);
> 	if (fd < 0)
> 		return NULL;
> 	if (ftruncate(fd, mem_size) < 0) {
> diff --git a/lib/librte_eal/linuxapp/eal/eal.c b/lib/librte_eal/linuxapp/eal/eal.c
> index e6a733138..c6308a1ca 100644
> --- a/lib/librte_eal/linuxapp/eal/eal.c
> +++ b/lib/librte_eal/linuxapp/eal/eal.c
> @@ -198,7 +198,7 @@ rte_eal_config_create(void)
> 		rte_mem_cfg_addr = NULL;
> 
> 	if (mem_cfg_fd < 0){
> -		mem_cfg_fd = open(pathname, O_RDWR | O_CREAT, 0660);
> +		mem_cfg_fd = open(pathname, O_RDWR | O_CREAT, 0600);
> 		if (mem_cfg_fd < 0)
> 			rte_panic("Cannot open '%s' for rte_mem_config\n", pathname);
> 	}
> diff --git a/lib/librte_eal/linuxapp/eal/eal_memory.c b/lib/librte_eal/linuxapp/eal/eal_memory.c
> index f1938ecfc..f3635373b 100644
> --- a/lib/librte_eal/linuxapp/eal/eal_memory.c
> +++ b/lib/librte_eal/linuxapp/eal/eal_memory.c
> @@ -740,7 +740,7 @@ static void *
> create_shared_memory(const char *filename, const size_t mem_size)
> {
> 	void *retval;
> -	int fd = open(filename, O_CREAT | O_RDWR, 0666);
> +	int fd = open(filename, O_CREAT | O_RDWR, 0600);
> 	if (fd < 0)
> 		return NULL;
> 	if (ftruncate(fd, mem_size) < 0) {
> -- 
> 2.21.0
>