[RFC PATCH 6/6] tomoyo: explicitly skip mediation of O_PATH file descriptors

[Ryan Lee <ryan.lee@canonical.com>]

Now that O_PATH fds are being passed to the file_open hook,
unconditionally skip mediation of them to preserve existing behavior.

Signed-off-by: Ryan Lee <ryan.lee@canonical.com>
---
 security/tomoyo/file.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/security/tomoyo/file.c b/security/tomoyo/file.c
index 8f3b90b6e03d..efecfa7d15b2 100644
--- a/security/tomoyo/file.c
+++ b/security/tomoyo/file.c
@@ -762,6 +762,10 @@ int tomoyo_check_open_permission(struct tomoyo_domain_info *domain,
 	};
 	int idx;
 
+	/* Preserve the behavior of O_PATH fd creation not being mediated */
+	if (flag & O_PATH)
+		return 0;
+
 	buf.name = NULL;
 	r.mode = TOMOYO_CONFIG_DISABLED;
 	idx = tomoyo_read_lock();
-- 
2.43.0

base-kernel: v6.14-rc6