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From: Namjae Jeon <linkinjeon@kernel.org>
To: Hyunchul Lee <hyc.lee@gmail.com>
Cc: linux-cifs@vger.kernel.org,
	Ronnie Sahlberg <ronniesahlberg@gmail.com>,
	Ralph Boehme <slow@samba.org>, Steve French <smfrench@gmail.com>
Subject: Re: [PATCH v4] ksmbd: use LOOKUP_BENEATH to prevent the out of share access
Date: Sat, 25 Sep 2021 09:43:39 +0900	[thread overview]
Message-ID: <CAKYAXd-XqKdgYSsQKJmDDjUyzqQcGfSjd5uJth3mnsRkAWjOjw@mail.gmail.com> (raw)
In-Reply-To: <20210924150616.926503-1-hyc.lee@gmail.com>

2021-09-25 0:06 GMT+09:00, Hyunchul Lee <hyc.lee@gmail.com>:
> instead of removing '..' in a given path, call
> kern_path with LOOKUP_BENEATH flag to prevent
> the out of share access.
>
> ran various test on this:
> smb2-cat-async smb://127.0.0.1/homes/../out_of_share
> smb2-cat-async smb://127.0.0.1/homes/foo/../../out_of_share
> smbclient //127.0.0.1/homes -c "mkdir ../foo2"
> smbclient //127.0.0.1/homes -c "rename bar ../bar"
>
> Cc: Ronnie Sahlberg <ronniesahlberg@gmail.com>
> Cc: Ralph Boehme <slow@samba.org>
> Cc: Steve French <smfrench@gmail.com>
> Cc: Namjae Jeon <linkinjeon@kernel.org>
> Signed-off-by: Hyunchul Lee <hyc.lee@gmail.com>
Looks good to me!
Acked-by: Namjae Jeon <linkinjeon@kernel.org>

Thanks!

  parent reply	other threads:[~2021-09-25  0:43 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-24 15:06 [PATCH v4] ksmbd: use LOOKUP_BENEATH to prevent the out of share access Hyunchul Lee
2021-09-24 17:20 ` Jeremy Allison
2021-09-25  0:08   ` Namjae Jeon
2021-09-25  0:21     ` Namjae Jeon
2021-09-25  0:43 ` Namjae Jeon [this message]
2021-09-25 17:45   ` Steve French
2021-09-28 15:18 ` Tom Talpey
2021-09-29 12:40   ` Namjae Jeon
2021-09-29 15:01     ` Tom Talpey
2021-09-29 23:52       ` Namjae Jeon
2021-09-30  0:01   ` Hyunchul Lee

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