Unverified Commit e3fdb6b6 authored by openeuler-ci-bot's avatar openeuler-ci-bot Committed by Gitee
Browse files

!15600 vfio/platform: check the bounds of read/write syscalls 

Merge Pull Request from: @ci-robot 
 
PR sync from: Tong Tiangen <tongtiangen@huawei.com>
https://mailweb.openeuler.org/archives/list/kernel@openeuler.org/message/QMRIHWVOUO5PI7QIRTPHRMZEDJEQ3DU7/ 
 
https://gitee.com/src-openeuler/kernel/issues/IBLDIK 
 
Link:https://gitee.com/openeuler/kernel/pulls/15600

 

Reviewed-by: default avatarYuan Can <yuancan@huawei.com>
Signed-off-by: default avatarYuan Can <yuancan@huawei.com>
parents a0f7a942 5fc74f7a

drivers/vfio/platform/vfio_platform_common.c

+10 −0
Original line number Diff line number Diff line
@@ -413,6 +413,11 @@ static ssize_t vfio_platform_read_mmio(struct vfio_platform_region *reg, 
{

	unsigned int done = 0;



	if (off >= reg->size)

		return -EINVAL;



	count = min_t(size_t, count, reg->size - off);



	if (!reg->ioaddr) {

		reg->ioaddr =

			ioremap_nocache(reg->addr, reg->size);
@@ -490,6 +495,11 @@ static ssize_t vfio_platform_write_mmio(struct vfio_platform_region *reg, 
{

	unsigned int done = 0;



	if (off >= reg->size)

		return -EINVAL;



	count = min_t(size_t, count, reg->size - off);



	if (!reg->ioaddr) {

		reg->ioaddr =

			ioremap_nocache(reg->addr, reg->size);