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| author | Christian Brauner <christian.brauner@ubuntu.com> | 2021-08-24 20:07:18 +0900 |
|---|---|---|
| committer | Steve French <stfrench@microsoft.com> | 2021-09-03 23:29:44 -0500 |
| commit | f0bb29d5c65b492ab82cce7b1e1dd00cbca28601 (patch) | |
| tree | 7dfc5a86d60a498724d6f027622c901e0f4138df /fs/ksmbd | |
| parent | 0e844efebdf9c03aed9ae1894f22762a8aee1a3b (diff) | |
| download | lwn-f0bb29d5c65b492ab82cce7b1e1dd00cbca28601.tar.gz lwn-f0bb29d5c65b492ab82cce7b1e1dd00cbca28601.zip | |
ksmbd: fix subauth 0 handling in sid_to_id()
It's not obvious why subauth 0 would be excluded from translation. This
would lead to wrong results whenever a non-identity idmapping is used.
Cc: Steve French <stfrench@microsoft.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Namjae Jeon <namjae.jeon@samsung.com>
Cc: Hyunchul Lee <hyc.lee@gmail.com>
Cc: Sergey Senozhatsky <senozhatsky@chromium.org>
Cc: linux-cifs@vger.kernel.org
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
Diffstat (limited to 'fs/ksmbd')
| -rw-r--r-- | fs/ksmbd/smbacl.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/ksmbd/smbacl.c b/fs/ksmbd/smbacl.c index 3307ca776eb1..e49e9bcdec80 100644 --- a/fs/ksmbd/smbacl.c +++ b/fs/ksmbd/smbacl.c @@ -274,7 +274,7 @@ static int sid_to_id(struct user_namespace *user_ns, uid_t id; id = le32_to_cpu(psid->sub_auth[psid->num_subauth - 1]); - if (id > 0) { + if (id >= 0) { uid = make_kuid(user_ns, id); if (uid_valid(uid) && kuid_has_mapping(user_ns, uid)) { fattr->cf_uid = uid; @@ -286,7 +286,7 @@ static int sid_to_id(struct user_namespace *user_ns, gid_t id; id = le32_to_cpu(psid->sub_auth[psid->num_subauth - 1]); - if (id > 0) { + if (id >= 0) { gid = make_kgid(user_ns, id); if (gid_valid(gid) && kgid_has_mapping(user_ns, gid)) { fattr->cf_gid = gid; |