From: Qing Wang <wangqing@vivo.com>
To: Ben Skeggs <bskeggs@redhat.com>, David Airlie <airlied@linux.ie>,
Daniel Vetter <daniel@ffwll.ch>,
dri-devel@lists.freedesktop.org, nouveau@lists.freedesktop.org,
linux-kernel@vger.kernel.org
Cc: Wang Qing <wangqing@vivo.com>
Subject: [Nouveau] [PATCH] drm: nouveau: use vmemdup_user instead of kvmalloc and copy_from_user
Date: Tue, 14 Dec 2021 04:17:46 -0800 [thread overview]
Message-ID: <1639484266-75733-1-git-send-email-wangqing@vivo.com> (raw)
From: Wang Qing <wangqing@vivo.com>
fix memdup_user.cocci warning:
nouveau_gem.c:630:7-15: WARNING opportunity for vmemdup_user
Signed-off-by: Wang Qing <wangqing@vivo.com>
---
drivers/gpu/drm/nouveau/nouveau_gem.c | 11 +----------
1 file changed, 1 insertion(+), 10 deletions(-)
diff --git a/drivers/gpu/drm/nouveau/nouveau_gem.c b/drivers/gpu/drm/nouveau/nouveau_gem.c
index 9416bee..befb864
--- a/drivers/gpu/drm/nouveau/nouveau_gem.c
+++ b/drivers/gpu/drm/nouveau/nouveau_gem.c
@@ -627,16 +627,7 @@ u_memcpya(uint64_t user, unsigned nmemb, unsigned size)
size *= nmemb;
- mem = kvmalloc(size, GFP_KERNEL);
- if (!mem)
- return ERR_PTR(-ENOMEM);
-
- if (copy_from_user(mem, userptr, size)) {
- u_free(mem);
- return ERR_PTR(-EFAULT);
- }
-
- return mem;
+ return vmemdup_user(userptr, size);
}
static int
--
2.7.4
reply other threads:[~2021-12-14 12:18 UTC|newest]
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