diff options
| author | Todd Kjos <tkjos@google.com> | 2021-11-10 15:00:36 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-11-18 14:03:36 +0100 |
| commit | afbec52fbce006a775edb21f87ccae713bc0e7d6 (patch) | |
| tree | 9d364a684cd71356a9dcf819294cb9d89a3ef178 /include/linux | |
| parent | 0d9f4ae7cd6f5283dd0e343265268c695ef592b0 (diff) | |
binder: use cred instead of task for getsecid
commit 4d5b5539742d2554591751b4248b0204d20dcc9d upstream.
Use the 'struct cred' saved at binder_open() to lookup
the security ID via security_cred_getsecid(). This
ensures that the security context that opened binder
is the one used to generate the secctx.
Cc: stable@vger.kernel.org # 5.4+
Fixes: ec74136ded79 ("binder: create node flag to request sender's security context")
Signed-off-by: Todd Kjos <tkjos@google.com>
Suggested-by: Stephen Smalley <stephen.smalley.work@gmail.com>
Reported-by: kernel test robot <lkp@intel.com>
Acked-by: Casey Schaufler <casey@schaufler-ca.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/security.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/security.h b/include/linux/security.h index e67cc8c40865..35355429648e 100644 --- a/include/linux/security.h +++ b/include/linux/security.h @@ -1003,6 +1003,11 @@ static inline void security_transfer_creds(struct cred *new, { } +static inline void security_cred_getsecid(const struct cred *c, u32 *secid) +{ + *secid = 0; +} + static inline int security_kernel_act_as(struct cred *cred, u32 secid) { return 0; |