diff options
| author | Mickaël Salaün <mic@linux.microsoft.com> | 2020-10-30 13:38:49 +0100 |
|---|---|---|
| committer | Kees Cook <keescook@chromium.org> | 2020-11-17 12:53:22 -0800 |
| commit | fb14528e443646dd3fd02df4437fcf5265b66baa (patch) | |
| tree | b3db578808d673b8e117351e02a5d20d6f3ebe76 /kernel/seccomp.c | |
| parent | cf23705244c947151179f929774fabf71e239eee (diff) | |
| download | lwn-fb14528e443646dd3fd02df4437fcf5265b66baa.tar.gz lwn-fb14528e443646dd3fd02df4437fcf5265b66baa.zip | |
seccomp: Set PF_SUPERPRIV when checking capability
Replace the use of security_capable(current_cred(), ...) with
ns_capable_noaudit() which set PF_SUPERPRIV.
Since commit 98f368e9e263 ("kernel: Add noaudit variant of
ns_capable()"), a new ns_capable_noaudit() helper is available. Let's
use it!
Cc: Jann Horn <jannh@google.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Tyler Hicks <tyhicks@linux.microsoft.com>
Cc: Will Drewry <wad@chromium.org>
Cc: stable@vger.kernel.org
Fixes: e2cfabdfd075 ("seccomp: add system call filtering using BPF")
Signed-off-by: Mickaël Salaün <mic@linux.microsoft.com>
Reviewed-by: Jann Horn <jannh@google.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20201030123849.770769-3-mic@digikod.net
Diffstat (limited to 'kernel/seccomp.c')
| -rw-r--r-- | kernel/seccomp.c | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/kernel/seccomp.c b/kernel/seccomp.c index 8ad7a293255a..53a7d1512dd7 100644 --- a/kernel/seccomp.c +++ b/kernel/seccomp.c @@ -38,7 +38,7 @@ #include <linux/filter.h> #include <linux/pid.h> #include <linux/ptrace.h> -#include <linux/security.h> +#include <linux/capability.h> #include <linux/tracehook.h> #include <linux/uaccess.h> #include <linux/anon_inodes.h> @@ -558,8 +558,7 @@ static struct seccomp_filter *seccomp_prepare_filter(struct sock_fprog *fprog) * behavior of privileged children. */ if (!task_no_new_privs(current) && - security_capable(current_cred(), current_user_ns(), - CAP_SYS_ADMIN, CAP_OPT_NOAUDIT) != 0) + !ns_capable_noaudit(current_user_ns(), CAP_SYS_ADMIN)) return ERR_PTR(-EACCES); /* Allocate a new seccomp_filter */ |