[PATCH v2] security: selinux: allow per-file labeling for bpffs

[PATCH v2] security: selinux: allow per-file labeling for bpffs

[Steven Moreland]

From: Connor O'Brien <connoro@google.com>

Add support for genfscon per-file labeling of bpffs files. This allows
for separate permissions for different pinned bpf objects, which may
be completely unrelated to each other.

Signed-off-by: Connor O'Brien <connoro@google.com>
Signed-off-by: Steven Moreland <smoreland@google.com>
---
 security/selinux/hooks.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index 116b4d644f68..d7b11188dc8d 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -750,7 +750,8 @@ static int selinux_set_mnt_opts(struct super_block *sb,
 	if (strcmp(sb->s_type->name, "proc") == 0)
 		sbsec->flags |= SE_SBPROC | SE_SBGENFS;
 
-	if (!strcmp(sb->s_type->name, "debugfs") ||
+	if (!strcmp(sb->s_type->name, "bpf") ||
+	    !strcmp(sb->s_type->name, "debugfs") ||
 	    !strcmp(sb->s_type->name, "tracefs") ||
 	    !strcmp(sb->s_type->name, "pstore"))
 		sbsec->flags |= SE_SBGENFS;
-- 
2.25.0.341.g760bfbb309-goog

v1 -> v2
- Rebased to be on upstream selinux tree
- Removed Android specific 'Change-Id'

Re: [PATCH v2] security: selinux: allow per-file labeling for bpffs

[Stephen Smalley]

On 2/6/20 4:14 PM, Steven Moreland wrote:
> From: Connor O'Brien <connoro@google.com>
> 
> Add support for genfscon per-file labeling of bpffs files. This allows
> for separate permissions for different pinned bpf objects, which may
> be completely unrelated to each other.
> 
> Signed-off-by: Connor O'Brien <connoro@google.com>
> Signed-off-by: Steven Moreland <smoreland@google.com>

Is this relative to the next branch of the selinux git tree?
Doesn't apply for me.

> ---
>   security/selinux/hooks.c | 3 ++-
>   1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
> index 116b4d644f68..d7b11188dc8d 100644
> --- a/security/selinux/hooks.c
> +++ b/security/selinux/hooks.c
> @@ -750,7 +750,8 @@ static int selinux_set_mnt_opts(struct super_block *sb,
>   	if (strcmp(sb->s_type->name, "proc") == 0)
>   		sbsec->flags |= SE_SBPROC | SE_SBGENFS;
>   
> -	if (!strcmp(sb->s_type->name, "debugfs") ||
> +	if (!strcmp(sb->s_type->name, "bpf") ||
> +	    !strcmp(sb->s_type->name, "debugfs") ||
>   	    !strcmp(sb->s_type->name, "tracefs") ||
>   	    !strcmp(sb->s_type->name, "pstore"))
>   		sbsec->flags |= SE_SBGENFS;
>