From: Jiasheng Jiang <jiasheng@iscas.ac.cn>
To: liviu.dudau@arm.com, brian.starkey@arm.com, airlied@linux.ie,
daniel@ffwll.ch
Cc: Jiasheng Jiang <jiasheng@iscas.ac.cn>,
linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org
Subject: [PATCH] drm: mali-dp: potential dereference of null pointer
Date: Tue, 14 Dec 2021 18:08:37 +0800 [thread overview]
Message-ID: <20211214100837.46912-1-jiasheng@iscas.ac.cn> (raw)
The return value of kzalloc() needs to be checked.
To avoid use of null pointer '&state->base' in case of the
failure of alloc.
Fixes: 99665d072183 ("drm: mali-dp: add malidp_crtc_state struct")
Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
---
drivers/gpu/drm/arm/malidp_crtc.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/arm/malidp_crtc.c b/drivers/gpu/drm/arm/malidp_crtc.c
index 494075ddbef6..b5928b52e279 100644
--- a/drivers/gpu/drm/arm/malidp_crtc.c
+++ b/drivers/gpu/drm/arm/malidp_crtc.c
@@ -487,7 +487,10 @@ static void malidp_crtc_reset(struct drm_crtc *crtc)
if (crtc->state)
malidp_crtc_destroy_state(crtc, crtc->state);
- __drm_atomic_helper_crtc_reset(crtc, &state->base);
+ if (state)
+ __drm_atomic_helper_crtc_reset(crtc, &state->base);
+ else
+ __drm_atomic_helper_crtc_reset(crtc, NULL);
}
static int malidp_crtc_enable_vblank(struct drm_crtc *crtc)
--
2.25.1
next reply other threads:[~2021-12-14 10:08 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-14 10:08 Jiasheng Jiang [this message]
2021-12-14 11:02 ` [PATCH] drm: mali-dp: potential dereference of null pointer Brian Starkey
2021-12-20 9:40 ` Daniel Vetter
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