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Message-ID: <CAKYAXd-3t6W1fv128D7LDcusZcabJdq3D6eq3ndE9_gP+PsVqg@mail.gmail.com>
Date: Tue, 7 Mar 2023 18:27:31 +0900
From: Namjae Jeon <linkinjeon@...nel.org>
To: ChenXiaoSong <chenxiaosong2@...wei.com>
Cc: sfrench@...ba.org, stfrench@...rosoft.com,
linux-cifs@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ksmbd: fix possible refcount leak in smb2_open()
2023-03-07 17:52 GMT+09:00, ChenXiaoSong <chenxiaosong2@...wei.com>:
> Hi Namjae and Steve:
Hi Chen,
>
> Do you have any suggestions for this patch?
Sorry, It was in the spam box...
I have sent ack. Thanks for noticing.
>
> 在 2023/3/2 21:58, ChenXiaoSong 写道:
>> Reference count of acls will leak when memory allocation fails. Fix this
>> by adding the missing posix_acl_release().
>>
>> Fixes: e2f34481b24d ("cifsd: add server-side procedures for SMB3")
>> Signed-off-by: ChenXiaoSong <chenxiaosong2@...wei.com>
>> ---
>> fs/ksmbd/smb2pdu.c | 5 ++++-
>> 1 file changed, 4 insertions(+), 1 deletion(-)
>>
>> diff --git a/fs/ksmbd/smb2pdu.c b/fs/ksmbd/smb2pdu.c
>> index 0685c1c77b9f..f04d810a2588 100644
>> --- a/fs/ksmbd/smb2pdu.c
>> +++ b/fs/ksmbd/smb2pdu.c
>> @@ -2977,8 +2977,11 @@ int smb2_open(struct ksmbd_work *work)
>> sizeof(struct smb_acl) +
>> sizeof(struct smb_ace) * ace_num * 2,
>> GFP_KERNEL);
>> - if (!pntsd)
>> + if (!pntsd) {
>> + posix_acl_release(fattr.cf_acls);
>> + posix_acl_release(fattr.cf_dacls);
>> goto err_out;
>> + }
>>
>> rc = build_sec_desc(idmap,
>> pntsd, NULL, 0,
>>
>
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