[<prev] [next>] [day] [month] [year] [list]
Message-Id: <20240323063933.665695-1-shum.sdl@nppct.ru>
Date: Sat, 23 Mar 2024 09:39:33 +0300
From: Andrey Shumilin <shum.sdl@...ct.ru>
To: Karol Herbst <kherbst@...hat.com>
Cc: Andrey Shumilin <shum.sdl@...ct.ru>,
Lyude Paul <lyude@...hat.com>,
Danilo Krummrich <dakr@...hat.com>,
David Airlie <airlied@...il.com>,
Daniel Vetter <daniel@...ll.ch>,
dri-devel@...ts.freedesktop.org,
nouveau@...ts.freedesktop.org,
linux-kernel@...r.kernel.org,
khoroshilov@...ras.ru,
ykarpov@...ras.ru,
vmerzlyakov@...ras.ru,
vefanov@...ras.ru
Subject: [PATCH] therm.c: Adding an array index check before accessing an element.
It is possible to access an element at index -1 if at the
first iteration of the loop the result of switch is equal to 0x25
Added variable checking.
Found by Linux Verification Center (linuxtesting.org) with SVACE.
Signed-off-by: Andrey Shumilin <shum.sdl@...ct.ru>
---
drivers/gpu/drm/nouveau/nvkm/subdev/bios/therm.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/bios/therm.c b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/therm.c
index 5babc5a7c7d5..78387053f214 100644
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/bios/therm.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/therm.c
@@ -180,6 +180,8 @@ nvbios_therm_fan_parse(struct nvkm_bios *bios, struct nvbios_therm_fan *fan)
cur_trip->fan_duty = duty_lut[(value & 0xf000) >> 12];
break;
case 0x25:
+ if (fan->nr_fan_trip == 0)
+ fan->nr_fan_trip++;
cur_trip = &fan->trip[fan->nr_fan_trip - 1];
cur_trip->fan_duty = value;
break;
--
2.30.2
Powered by blists - more mailing lists