diff options
| author | Vinicius Costa Gomes <vinicius.gomes@intel.com> | 2024-11-06 16:57:17 -0800 |
|---|---|---|
| committer | Amir Goldstein <amir73il@gmail.com> | 2024-11-11 10:45:04 +0100 |
| commit | 49dffdfde462c7823de6ed882f71ce233aaeba63 (patch) | |
| tree | 494b874da2804e7ec81ebd1433c1da5e6246c694 /kernel/cred.c | |
| parent | 48b50624aec454ce0fa8f78ef96e2f43bc0be495 (diff) | |
cred: Add a light version of override/revert_creds()
Add a light version of override/revert_creds(), this should only be
used when the credentials in question will outlive the critical
section and the critical section doesn't change the ->usage of the
credentials.
Suggested-by: Christian Brauner <brauner@kernel.org>
Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@intel.com>
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Diffstat (limited to 'kernel/cred.c')
| -rw-r--r-- | kernel/cred.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/kernel/cred.c b/kernel/cred.c index 075cfa7c896f..da7da250f7c8 100644 --- a/kernel/cred.c +++ b/kernel/cred.c @@ -485,7 +485,7 @@ EXPORT_SYMBOL(abort_creds); */ const struct cred *override_creds(const struct cred *new) { - const struct cred *old = current->cred; + const struct cred *old; kdebug("override_creds(%p{%ld})", new, atomic_long_read(&new->usage)); @@ -499,7 +499,7 @@ const struct cred *override_creds(const struct cred *new) * visible to other threads under RCU. */ get_new_cred((struct cred *)new); - rcu_assign_pointer(current->cred, new); + old = override_creds_light(new); kdebug("override_creds() = %p{%ld}", old, atomic_long_read(&old->usage)); @@ -521,7 +521,7 @@ void revert_creds(const struct cred *old) kdebug("revert_creds(%p{%ld})", old, atomic_long_read(&old->usage)); - rcu_assign_pointer(current->cred, old); + revert_creds_light(old); put_cred(override); } EXPORT_SYMBOL(revert_creds); |