diff options
author | Todd Kjos <tkjos@google.com> | 2021-11-10 15:00:23 -0800 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-11-17 09:48:16 +0100 |
commit | 28a1e470b000d45bcf6c05f18a01d07cdc0b3235 (patch) | |
tree | 53b9d6817372d47925b4e972f27139cf9d94335d /security | |
parent | 3e87c4996de192ec5369f4a79098dfec7fe8447c (diff) |
binder: use euid from cred instead of using task
commit 29bc22ac5e5bc63275e850f0c8fc549e3d0e306b upstream.
Save the 'struct cred' associated with a binder process
at initial open to avoid potential race conditions
when converting to an euid.
Set a transaction's sender_euid from the 'struct cred'
saved at binder_open() instead of looking up the euid
from the binder proc's 'struct task'. This ensures
the euid is associated with the security context that
of the task that opened binder.
Cc: stable@vger.kernel.org # 4.4+
Fixes: 457b9a6f09f0 ("Staging: android: add binder driver")
Signed-off-by: Todd Kjos <tkjos@google.com>
Suggested-by: Stephen Smalley <stephen.smalley.work@gmail.com>
Suggested-by: Jann Horn <jannh@google.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 'security')
0 files changed, 0 insertions, 0 deletions