linux-kernel - Re: Linux 4.2-rc1

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Message-ID: <CA+55aFy-iZ2g8xKZW---LgUHaVMbqLZ_oadw=Vbg0g78dfH9PA@mail.gmail.com>
Date:	Wed, 8 Jul 2015 10:17:07 -0700
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Shuah Khan <shuahkhan@...il.com>,
	Ming Lei <ming.lei@...onical.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Shuah Khan <shuahkh@....samsung.com>
Subject: Re: Linux 4.2-rc1

On Wed, Jul 8, 2015 at 9:32 AM, Shuah Khan <shuahkhan@...il.com> wrote:
>
> I am seeing the following NULL pointer dereference on my test system:
>
> [    3.640599] BUG: unable to handle kernel NULL pointer dereference at 0000000000000080
> [    3.640609] IP: [<ffffffff814f1463>] firmware_uevent+0x23/0x80

Decoding the "Code:" line shows that this is the "->fw_id" dereference in

        if (add_uevent_var(env, "FIRMWARE=%s", fw_priv->buf->fw_id))
                return -ENOMEM;

and that "fw_priv->buf" pointer is NULL.

However, I don't see anything that looks like it should have changed
any of this since 4.1.

Adding the appropriate firmware people to the cc.

                   Linus
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