From: Miaoqian Lin <linmq006@gmail.com>
To: Daniel Golle <daniel@makrotopia.org>,
Qingfang Deng <dqfext@gmail.com>,
SkyLake Huang <SkyLake.Huang@mediatek.com>,
Andrew Lunn <andrew@lunn.ch>,
Heiner Kallweit <hkallweit1@gmail.com>,
Russell King <linux@armlinux.org.uk>,
"David S. Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@google.com>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
Matthias Brugger <matthias.bgg@gmail.com>,
AngeloGioacchino Del Regno
<angelogioacchino.delregno@collabora.com>,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-mediatek@lists.infradead.org
Cc: linmq006@gmail.com, stable@vger.kernel.org
Subject: [PATCH] net: phy: mediatek: fix nvmem cell reference leak in mt798x_phy_calibration
Date: Thu, 11 Dec 2025 12:13:13 +0400 [thread overview]
Message-ID: <20251211081313.2368460-1-linmq006@gmail.com> (raw)
When nvmem_cell_read() fails in mt798x_phy_calibration(), the function
returns without calling nvmem_cell_put(), leaking the cell reference.
Move nvmem_cell_put() right after nvmem_cell_read() to ensure the cell
reference is always released regardless of the read result.
Found via static analysis and code review.
Fixes: 98c485eaf509 ("net: phy: add driver for MediaTek SoC built-in GE PHYs")
Cc: stable@vger.kernel.org
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
---
drivers/net/phy/mediatek/mtk-ge-soc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/phy/mediatek/mtk-ge-soc.c b/drivers/net/phy/mediatek/mtk-ge-soc.c
index cd09fbf92ef2..2c4bbc236202 100644
--- a/drivers/net/phy/mediatek/mtk-ge-soc.c
+++ b/drivers/net/phy/mediatek/mtk-ge-soc.c
@@ -1167,9 +1167,9 @@ static int mt798x_phy_calibration(struct phy_device *phydev)
}
buf = (u32 *)nvmem_cell_read(cell, &len);
+ nvmem_cell_put(cell);
if (IS_ERR(buf))
return PTR_ERR(buf);
- nvmem_cell_put(cell);
if (!buf[0] || !buf[1] || !buf[2] || !buf[3] || len < 4 * sizeof(u32)) {
phydev_err(phydev, "invalid efuse data\n");
--
2.25.1
next reply other threads:[~2025-12-11 8:13 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-12-11 8:13 Miaoqian Lin [this message]
2025-12-11 11:05 ` [PATCH] net: phy: mediatek: fix nvmem cell reference leak in mt798x_phy_calibration Daniel Golle
2025-12-11 13:34 ` Andrew Lunn
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=20251211081313.2368460-1-linmq006@gmail.com \
--to=linmq006@gmail.com \
--cc=SkyLake.Huang@mediatek.com \
--cc=andrew@lunn.ch \
--cc=angelogioacchino.delregno@collabora.com \
--cc=daniel@makrotopia.org \
--cc=davem@davemloft.net \
--cc=dqfext@gmail.com \
--cc=edumazet@google.com \
--cc=hkallweit1@gmail.com \
--cc=kuba@kernel.org \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mediatek@lists.infradead.org \
--cc=linux@armlinux.org.uk \
--cc=matthias.bgg@gmail.com \
--cc=netdev@vger.kernel.org \
--cc=pabeni@redhat.com \
--cc=stable@vger.kernel.org \
/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