From: Kunwu Chan <chentao@kylinos.cn>
Date: Tue, 12 Dec 2023 10:40:15 +0800
Subject: ice: Fix some null pointer dereference issues in ice_ptp.c
Patch-mainline: v6.8-rc1
Git-commit: 3027e7b15b02d2d37e3f82d6b8404f6d37e3b8cf
References: jsc#PED-4876 bsc#1220424 CVE-2023-52471
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@hotmail.com>
Suggested-by: Przemek Kitszel <przemyslaw.kitszel@intel.com>
Signed-off-by: Kunwu Chan <chentao@kylinos.cn>
Reviewed-by: Przemek Kitszel <przemyslaw.kitszel@intel.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Tested-by: Pucha Himasekhar Reddy <himasekharx.reddy.pucha@intel.com> (A Contingent worker at Intel)
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
drivers/net/ethernet/intel/ice/ice_ptp.c | 4 ++++
1 file changed, 4 insertions(+)
--- a/drivers/net/ethernet/intel/ice/ice_ptp.c
+++ b/drivers/net/ethernet/intel/ice/ice_ptp.c
@@ -2863,6 +2863,8 @@ static int ice_ptp_register_auxbus_drive
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;
@@ -3109,6 +3111,8 @@ static int ice_ptp_create_auxbus_device(
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_dev->name = name;
aux_dev->id = id;