From: Pavel Shilovsky <piastryyy@gmail.com>
To: Ronnie Sahlberg <lsahlber@redhat.com>
Cc: linux-cifs <linux-cifs@vger.kernel.org>,
Steve French <smfrench@gmail.com>
Subject: Re: [PATCH] cifs: use helpers when parsing uid/gid mount options and validate them
Date: Thu, 8 Jul 2021 15:11:46 -0700 [thread overview]
Message-ID: <CAKywueSiuJU4YipMtsyf+CYDywSX3ySgMrmsvt9swJT4GkjTZg@mail.gmail.com> (raw)
In-Reply-To: <20210707232416.2694911-2-lsahlber@redhat.com>
ср, 7 июл. 2021 г. в 16:25, Ronnie Sahlberg <lsahlber@redhat.com>:
>
> Use the nice helpers to initialize and the uid/gid/cred_uid when passed as mount arguments.
>
> Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
> ---
> fs/cifs/fs_context.c | 24 +++++++++++++++++++-----
> fs/cifs/fs_context.h | 1 +
> 2 files changed, 20 insertions(+), 5 deletions(-)
>
> diff --git a/fs/cifs/fs_context.c b/fs/cifs/fs_context.c
> index 92d4ab029c91..553adfbcc22a 100644
> --- a/fs/cifs/fs_context.c
> +++ b/fs/cifs/fs_context.c
> @@ -322,7 +322,6 @@ smb3_fs_context_dup(struct smb3_fs_context *new_ctx, struct smb3_fs_context *ctx
> new_ctx->UNC = NULL;
> new_ctx->source = NULL;
> new_ctx->iocharset = NULL;
> -
> /*
> * Make sure to stay in sync with smb3_cleanup_fs_context_contents()
> */
> @@ -792,6 +791,8 @@ static int smb3_fs_context_parse_param(struct fs_context *fc,
> int i, opt;
> bool is_smb3 = !strcmp(fc->fs_type->name, "smb3");
> bool skip_parsing = false;
> + kuid_t uid;
> + kgid_t gid;
>
> cifs_dbg(FYI, "CIFS: parsing cifs mount option '%s'\n", param->key);
>
> @@ -904,18 +905,31 @@ static int smb3_fs_context_parse_param(struct fs_context *fc,
> }
> break;
> case Opt_uid:
> - ctx->linux_uid.val = result.uint_32;
> + uid = make_kuid(current_user_ns(), result.uint_32);
> + if (!uid_valid(uid))
> + goto cifs_parse_mount_err;
> + ctx->linux_uid = uid;
> ctx->uid_specified = true;
> break;
> case Opt_cruid:
> - ctx->cred_uid.val = result.uint_32;
> + uid = make_kuid(current_user_ns(), result.uint_32);
> + if (!uid_valid(uid))
> + goto cifs_parse_mount_err;
> + ctx->cred_uid = uid;
> + ctx->cruid_specified = true;
> break;
> case Opt_backupgid:
> - ctx->backupgid.val = result.uint_32;
> + gid = make_kgid(current_user_ns(), result.uint_32);
> + if (!gid_valid(gid))
> + goto cifs_parse_mount_err;
> + ctx->backupgid = gid;
> ctx->backupgid_specified = true;
> break;
> case Opt_gid:
> - ctx->linux_gid.val = result.uint_32;
> + gid = make_kgid(current_user_ns(), result.uint_32);
> + if (!gid_valid(gid))
> + goto cifs_parse_mount_err;
> + ctx->linux_gid = gid;
> ctx->gid_specified = true;
> break;
> case Opt_port:
> diff --git a/fs/cifs/fs_context.h b/fs/cifs/fs_context.h
> index 2a71c8e411ac..b6243972edf3 100644
> --- a/fs/cifs/fs_context.h
> +++ b/fs/cifs/fs_context.h
> @@ -155,6 +155,7 @@ enum cifs_param {
>
> struct smb3_fs_context {
> bool uid_specified;
> + bool cruid_specified;
Is it going to be used somewhere?
> bool gid_specified;
> bool sloppy;
> bool got_ip;
> --
> 2.30.2
>
Acked-by: Pavel Shilovsky <pshilovsky@samba.org>
--
Best regards,
Pavel Shilovsky
next prev parent reply other threads:[~2021-07-08 22:12 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-07 23:24 [PATCH 0/1] cifs: use helpers when parsing uid/gid mount options and Ronnie Sahlberg
2021-07-07 23:24 ` [PATCH] cifs: use helpers when parsing uid/gid mount options and validate them Ronnie Sahlberg
2021-07-08 0:57 ` Steve French
2021-07-08 22:11 ` Pavel Shilovsky [this message]
2021-07-08 23:25 ` ronnie sahlberg
2021-07-09 0:20 ` Steve French
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