From: Vladis Dronov <vdronov@redhat.com>
To: Ard Biesheuvel <ardb@kernel.org>
Cc: linux-efi <linux-efi@vger.kernel.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] efi: fix a race and a buffer overflow while reading efivars via sysfs
Date: Wed, 4 Mar 2020 10:45:16 -0500 (EST) [thread overview]
Message-ID: <925307051.13073500.1583336716147.JavaMail.zimbra@redhat.com> (raw)
In-Reply-To: <CAKv+Gu_3ZRRcoAcLTVVQe26q5x9KALmztaNQF=e=KqWaAwxtpA@mail.gmail.com>
Hello, Ard,
> Wouldn't it be easier to pass a var_data_size stack variable into
> efivar_entry_get(), and only update the value in 'var' if it is <=
> 1024?
I have prepared a v2 patch with an approach you suggest and will send it
out shortly. It indeed simpler and fixes only the overflow bug mentioned.
Could you, please, review it and if you like it, probably, accept it?
In case I've implemented your idea incorrectly, could you, please,
correct me?
Best regards,
Vladis Dronov | Red Hat, Inc. | The Core Kernel | Senior Software Engineer
next prev parent reply other threads:[~2020-03-04 15:45 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-03 8:55 [PATCH] efi: fix a race and a buffer overflow while reading efivars via sysfs Vladis Dronov
2020-03-03 9:15 ` Ard Biesheuvel
2020-03-03 10:14 ` Vladis Dronov
2020-03-03 10:20 ` Ard Biesheuvel
2020-03-03 10:24 ` Vladis Dronov
2020-03-04 6:51 ` joeyli
2020-03-04 15:45 ` Vladis Dronov [this message]
2020-03-04 15:47 ` Ard Biesheuvel
2020-03-04 15:49 ` [PATCH v2] " Vladis Dronov
2020-03-04 15:57 ` Ard Biesheuvel
2020-03-04 17:18 ` Vladis Dronov
2020-03-04 17:21 ` Ard Biesheuvel
2020-03-05 6:01 ` joeyli
2020-03-05 6:17 ` Vladis Dronov
2020-03-05 8:40 ` [PATCH v3 0/3] efi: fix a race and add a sanity check Vladis Dronov
2020-03-05 8:40 ` [PATCH v3 1/3] efi: fix a race and a buffer overflow while reading efivars via sysfs Vladis Dronov
2020-03-05 8:45 ` Ard Biesheuvel
2020-03-05 10:52 ` Vladis Dronov
2020-03-08 16:38 ` [tip: efi/urgent] efi: Fix " tip-bot2 for Vladis Dronov
2020-03-05 8:40 ` [PATCH v3 2/3] efi: add a sanity check to efivar_store_raw() Vladis Dronov
2020-03-08 16:38 ` [tip: efi/urgent] efi: Add " tip-bot2 for Vladis Dronov
2020-03-05 8:40 ` [PATCH v3 3/3] efi: fix a mistype in comments mentioning efivar_entry_iter_begin() Vladis Dronov
2020-03-05 8:51 ` [PATCH v3 0/3] efi: fix a race and add a sanity check Ard Biesheuvel
2020-03-04 14:07 ` [PATCH] efi: fix a race and a buffer overflow while reading efivars via sysfs joeyli
2020-03-04 16:06 ` Vladis Dronov
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