From b7fdd208687ba59ebfb09b2199596471c63b69e3 Mon Sep 17 00:00:00 2001
From: Evgeny Novikov <novikov@ispras.ru>
Date: Wed, 19 May 2021 14:04:49 +0200
Subject: [PATCH] media: st-hva: Fix potential NULL pointer dereferences
Git-commit: b7fdd208687ba59ebfb09b2199596471c63b69e3
Patch-mainline: v5.14-rc1
References: git-fixes
When ctx_id >= HVA_MAX_INSTANCES in hva_hw_its_irq_thread() it tries to
access fields of ctx that is NULL at that point. The patch gets rid of
these accesses.
Found by Linux Driver Verification project (linuxtesting.org).
Signed-off-by: Evgeny Novikov <novikov@ispras.ru>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/media/platform/sti/hva/hva-hw.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/media/platform/sti/hva/hva-hw.c b/drivers/media/platform/sti/hva/hva-hw.c
index 77b8bfa5e0c5..30fb1aa4a351 100644
--- a/drivers/media/platform/sti/hva/hva-hw.c
+++ b/drivers/media/platform/sti/hva/hva-hw.c
@@ -130,8 +130,7 @@ static irqreturn_t hva_hw_its_irq_thread(int irq, void *arg)
ctx_id = (hva->sts_reg & 0xFF00) >> 8;
if (ctx_id >= HVA_MAX_INSTANCES) {
dev_err(dev, "%s %s: bad context identifier: %d\n",
- ctx->name, __func__, ctx_id);
- ctx->hw_err = true;
+ HVA_PREFIX, __func__, ctx_id);
goto out;
}
--
2.26.2