linux-hardening - [PATCH v3 0/2] igb: Proactively round up to kmalloc bucket size

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Message-Id: <20221018092340.never.556-kees@kernel.org>
Date:   Tue, 18 Oct 2022 02:25:23 -0700
From:   Kees Cook <keescook@...omium.org>
To:     Ruhl@....outflux.net, Michael J <michael.j.ruhl@...el.com>
Cc:     Kees Cook <keescook@...omium.org>,
        Jesse Brandeburg <jesse.brandeburg@...el.com>,
        Tony Nguyen <anthony.l.nguyen@...el.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>, linux-kernel@...r.kernel.org,
        intel-wired-lan@...ts.osuosl.org, netdev@...r.kernel.org,
        linux-hardening@...r.kernel.org
Subject: [PATCH v3 0/2] igb: Proactively round up to kmalloc bucket size

Hi,

In preparation for removing the "silently change allocation size"
users of ksize(), explicitly round up all q_vector allocations so that
allocations can be correctly compared to ksize().

Before that, fix a potential Use After Free under memory pressure.

Thanks,

-Kees

v3; split UAF fix from bucket rounding.
v2: https://lore.kernel.org/lkml/20220923202822.2667581-7-keescook@chromium.org/

Kees Cook (2):
  igb: Do not free q_vector unless new one was allocated
  igb: Proactively round up to kmalloc bucket size

 drivers/net/ethernet/intel/igb/igb_main.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

-- 
2.34.1