linux-kernel - [PATCH] ice: Fix some null pointer dereference issues in ice

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Message-Id: <20231211062649.247148-1-chentao@kylinos.cn>
Date:   Mon, 11 Dec 2023 14:26:49 +0800
From:   Kunwu Chan <chentao@...inos.cn>
To:     jesse.brandeburg@...el.com, anthony.l.nguyen@...el.com,
        davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
        pabeni@...hat.com, richardcochran@...il.com,
        jacob.e.keller@...el.com
Cc:     karol.kolacinski@...el.com, michal.michalik@...el.com,
        intel-wired-lan@...ts.osuosl.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, Kunwu Chan <chentao@...inos.cn>,
        Kunwu Chan <kunwu.chan@...mail.com>
Subject: [PATCH] ice: Fix some null pointer dereference issues in ice_ptp.c

devm_kasprintf() returns a pointer to dynamically allocated memory
which can be NULL upon failure.

Fixes: d938a8cca88a ("ice: Auxbus devices & driver for E822 TS")
Cc: Kunwu Chan <kunwu.chan@...mail.com>
Signed-off-by: Kunwu Chan <chentao@...inos.cn>
---
 drivers/net/ethernet/intel/ice/ice_ptp.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/net/ethernet/intel/ice/ice_ptp.c b/drivers/net/ethernet/intel/ice/ice_ptp.c
index 1eddcbe89b0c..59794ce4f243 100644
--- a/drivers/net/ethernet/intel/ice/ice_ptp.c
+++ b/drivers/net/ethernet/intel/ice/ice_ptp.c
@@ -2668,6 +2668,8 @@ static int ice_ptp_register_auxbus_driver(struct ice_pf *pf)
 	name = devm_kasprintf(dev, GFP_KERNEL, "ptp_aux_dev_%u_%u_clk%u",
 			      pf->pdev->bus->number, PCI_SLOT(pf->pdev->devfn),
 			      ice_get_ptp_src_clock_index(&pf->hw));
+	if (!name)
+		return -ENOMEM;
 
 	aux_driver->name = name;
 	aux_driver->shutdown = ice_ptp_auxbus_shutdown;
@@ -2929,6 +2931,10 @@ static int ice_ptp_create_auxbus_device(struct ice_pf *pf)
 	name = devm_kasprintf(dev, GFP_KERNEL, "ptp_aux_dev_%u_%u_clk%u",
 			      pf->pdev->bus->number, PCI_SLOT(pf->pdev->devfn),
 			      ice_get_ptp_src_clock_index(&pf->hw));
+	if (!name) {
+		dev_err(dev, "Failed to allocate memory\n");
+		return -ENOMEM;
+	}
 
 	aux_dev->name = name;
 	aux_dev->id = id;
-- 
2.39.2