From: "Neftin, Sasha" <sasha.neftin@intel.com>
To: Yu Hao <yhao016@ucr.edu>, <jesse.brandeburg@intel.com>,
<anthony.l.nguyen@intel.com>, <davem@davemloft.net>,
<edumazet@google.com>, <kuba@kernel.org>, <pabeni@redhat.com>,
<intel-wired-lan@lists.osuosl.org>, <netdev@vger.kernel.org>,
linux-kernel <linux-kernel@vger.kernel.org>,
"Ruinskiy, Dima" <dima.ruinskiy@intel.com>,
"Edri, Michael" <michael.edri@intel.com>
Subject: Re: [Intel-wired-lan] [PATCH] ethernet: e1000e: Fix possible uninit bug
Date: Wed, 5 Jul 2023 18:47:26 +0300 [thread overview]
Message-ID: <9fff2b17-0b66-93a0-87aa-ca6479cb0663@intel.com> (raw)
In-Reply-To: <CA+UBctC57Lx=8Eh6P51cVz+cyb02GE_B-dWnYhffWoc-nm7v6Q@mail.gmail.com>
On 7/5/2023 03:10, Yu Hao wrote:
> The variable phy_data should be initialized in function e1e_rphy.
> However, there is not return value check, which means there is a
> possible uninit read later for the variable.
>
> Signed-off-by: Yu Hao <yhao016@ucr.edu>
> ---
> drivers/net/ethernet/intel/e1000e/netdev.c | 5 ++++-
> 1 file changed, 4 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/net/ethernet/intel/e1000e/netdev.c
> b/drivers/net/ethernet/intel/e1000e/netdev.c
> index 771a3c909c45..455af5e55cc6 100644
> --- a/drivers/net/ethernet/intel/e1000e/netdev.c
> +++ b/drivers/net/ethernet/intel/e1000e/netdev.c
> @@ -6910,8 +6910,11 @@ static int __e1000_resume(struct pci_dev *pdev)
> /* report the system wakeup cause from S3/S4 */
> if (adapter->flags2 & FLAG2_HAS_PHY_WAKEUP) {
> u16 phy_data;
> + s32 ret_val;
why just not initialize u16 phy_data = 0? How did it hurt us? (legacy)
>
> - e1e_rphy(&adapter->hw, BM_WUS, &phy_data);
> + ret_val = e1e_rphy(&adapter->hw, BM_WUS, &phy_data);
> + if (ret_val)
> + return ret_val;
> if (phy_data) {
> e_info("PHY Wakeup cause - %s\n",
> phy_data & E1000_WUS_EX ? "Unicast Packet" :
_______________________________________________
Intel-wired-lan mailing list
Intel-wired-lan@osuosl.org
https://lists.osuosl.org/mailman/listinfo/intel-wired-lan
next prev parent reply other threads:[~2023-07-05 15:47 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-07-05 0:10 [Intel-wired-lan] [PATCH] ethernet: e1000e: Fix possible uninit bug Yu Hao
2023-07-05 15:47 ` Neftin, Sasha [this message]
2023-07-10 0:55 ` Yu Hao
2023-07-10 7:55 ` Neftin, Sasha
2023-07-10 8:13 ` Denis Kirjanov
-- strict thread matches above, loose matches on Subject: below --
2023-07-10 0:57 Yu Hao
2023-07-10 4:02 ` Pavan Chebbi
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=9fff2b17-0b66-93a0-87aa-ca6479cb0663@intel.com \
--to=sasha.neftin@intel.com \
--cc=anthony.l.nguyen@intel.com \
--cc=davem@davemloft.net \
--cc=dima.ruinskiy@intel.com \
--cc=edumazet@google.com \
--cc=intel-wired-lan@lists.osuosl.org \
--cc=jesse.brandeburg@intel.com \
--cc=kuba@kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=michael.edri@intel.com \
--cc=netdev@vger.kernel.org \
--cc=pabeni@redhat.com \
--cc=yhao016@ucr.edu \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox