linux-kernel - RE: [PATCH][next] cifsd: fix kfree of uninitialized pointer oid

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Date:   Fri, 11 Jun 2021 09:40:24 +0900
From:   "Namjae Jeon" <namjae.jeon@...sung.com>
To:     "'Colin King'" <colin.king@...onical.com>
Cc:     <kernel-janitors@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        "'Sergey Senozhatsky'" <sergey.senozhatsky@...il.com>,
        "'Steve French'" <sfrench@...ba.org>,
        "'Hyunchul Lee'" <hyc.lee@...il.com>, <linux-cifs@...r.kernel.org>,
        <linux-cifsd-devel@...ts.sourceforge.net>
Subject: RE: [PATCH][next] cifsd: fix kfree of uninitialized pointer oid

> From: Colin Ian King <colin.king@...onical.com>
> 
> Currently function ksmbd_neg_token_init_mech_type can kfree an uninitialized pointer oid when the call
> to asn1_oid_decode fails when vlen is out of range. All the other failure cases in function
> asn1_oid_decode set *oid to NULL on an error, so fix the issue by ensuring the vlen out of range error
> also nullifies the pointer.
> 
> Fixes: 8bae4419ce63 ("cifsd: add goto fail in neg_token_init_mech_type()")
> Addresses-Coverity: ("Uninitialized pointer read")
> Signed-off-by: Colin Ian King <colin.king@...onical.com>
I will apply, Thanks for your patch!