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drm: Fix missing bounds checks in dma buf mmap.

This commit is contained in:
riastradh 2024-05-20 11:35:10 +00:00
parent 73cc3a49be
commit 7ad9adf8b9
1 changed files with 3 additions and 3 deletions
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6
sys/external/bsd/drm2/linux/linux_dma_buf.c vendored
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@ -1,4 +1,4 @@
/* $NetBSD: linux_dma_buf.c,v 1.16 2023/02/21 11:40:13 riastradh Exp $ */
/* $NetBSD: linux_dma_buf.c,v 1.17 2024/05/20 11:35:10 riastradh Exp $ */
/*-
* Copyright (c) 2018 The NetBSD Foundation, Inc.
@ -30,7 +30,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: linux_dma_buf.c,v 1.16 2023/02/21 11:40:13 riastradh Exp $");
__KERNEL_RCSID(0, "$NetBSD: linux_dma_buf.c,v 1.17 2024/05/20 11:35:10 riastradh Exp $");
#include <sys/types.h>
#include <sys/atomic.h>
@ -285,7 +285,7 @@ dmabuf_fop_mmap(struct file *file, off_t *offp, size_t size, int prot,
{
struct dma_buf *dmabuf = file->f_data;
if (size > dmabuf->size)
if (size > dmabuf->size || *offp < 0 || *offp > dmabuf->size - size)
return EINVAL;
return dmabuf->ops->mmap(dmabuf, offp, size, prot, flagsp, advicep,