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List:       linux-api
Subject:    [PATCH 22/34] af_unix: handle idmapped mounts
From:       Christian Brauner <christian.brauner () ubuntu ! com>
Date:       2020-10-29 0:32:40
Message-ID: 20201029003252.2128653-23-christian.brauner () ubuntu ! com
[Download RAW message or body]

When binding a non-abstract AF_UNIX socket it will gain a representation in the
filesystem. Enable the socket infrastructure to handle idmapped mounts by using
the new vfs_mapped_mknod() helper. Non-idmapped mounts will not see any altered
behavior.

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
---
 net/unix/af_unix.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c
index 41c3303c3357..f79f7ce3243f 100644
--- a/net/unix/af_unix.c
+++ b/net/unix/af_unix.c
@@ -996,7 +996,7 @@ static int unix_mknod(const char *sun_path, umode_t mode, struct path *res)
 	 */
 	err = security_path_mknod(&path, dentry, mode, 0);
 	if (!err) {
-		err = vfs_mknod(d_inode(path.dentry), dentry, mode, 0);
+		err = vfs_mapped_mknod(mnt_user_ns(path.mnt), d_inode(path.dentry), dentry, mode, 0);
 		if (!err) {
 			res->mnt = mntget(path.mnt);
 			res->dentry = dget(dentry);
-- 
2.29.0

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