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ksmbd: the buffer of smb2 query dir response has at least 1 byte

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commit ce61b605a0 upstream.

When STATUS_NO_MORE_FILES status is set to smb2 query dir response,
->StructureSize is set to 9, which mean buffer has 1 byte.
This issue occurs because ->Buffer[1] in smb2_query_directory_rsp to
flex-array.

Fixes: eb3e28c1e8 ("smb3: Replace smb2pdu 1-element arrays with flex-arrays")
Cc: stable@vger.kernel.org # v6.1+
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Namjae Jeon 2024-08-20 22:07:38 +09:00 committed by Greg Kroah-Hartman
parent 76df3a1970
commit 09982d418a
1 changed files with 2 additions and 1 deletions
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3
fs/smb/server/smb2pdu.c
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@ -4406,7 +4406,8 @@ int smb2_query_dir(struct ksmbd_work *work)
rsp->OutputBufferLength = cpu_to_le32(0);
rsp->Buffer[0] = 0;
rc = ksmbd_iov_pin_rsp(work, (void *)rsp,
sizeof(struct smb2_query_directory_rsp));
offsetof(struct smb2_query_directory_rsp, Buffer)
+ 1);
if (rc)
goto err_out;
} else {