* [PATCH] drm/amdgpu: fix the warning about the expression (int)size - len
@ 2024-04-25 7:17 Jesse Zhang
2024-04-25 13:29 ` Alex Deucher
0 siblings, 1 reply; 4+ messages in thread
From: Jesse Zhang @ 2024-04-25 7:17 UTC (permalink / raw)
To: amd-gfx
Cc: Alexander.Deucher, Christian Koenig, Tim.Huang, Jesse Zhang,
Jesse Zhang
Converting size from size_t to int may overflow.
v2: keep reverse xmas tree order (Christian)
Signed-off-by: Jesse Zhang <Jesse.Zhang@amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
index f5d0fa207a88..b62ae3c91a9d 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
@@ -2065,12 +2065,13 @@ static ssize_t amdgpu_reset_dump_register_list_write(struct file *f,
struct amdgpu_device *adev = (struct amdgpu_device *)file_inode(f)->i_private;
char reg_offset[11];
uint32_t *new = NULL, *tmp = NULL;
- int ret, i = 0, len = 0;
+ unsigned int len = 0;
+ int ret, i = 0;
do {
memset(reg_offset, 0, 11);
if (copy_from_user(reg_offset, buf + len,
- min(10, ((int)size-len)))) {
+ min(10, (size-len)))) {
ret = -EFAULT;
goto error_free;
}
--
2.25.1
^ permalink raw reply related [flat|nested] 4+ messages in thread* Re: [PATCH] drm/amdgpu: fix the warning about the expression (int)size - len
2024-04-25 7:17 [PATCH] drm/amdgpu: fix the warning about the expression (int)size - len Jesse Zhang
@ 2024-04-25 13:29 ` Alex Deucher
0 siblings, 0 replies; 4+ messages in thread
From: Alex Deucher @ 2024-04-25 13:29 UTC (permalink / raw)
To: Jesse Zhang; +Cc: amd-gfx, Alexander.Deucher, Christian Koenig, Tim.Huang
On Thu, Apr 25, 2024 at 3:37 AM Jesse Zhang <jesse.zhang@amd.com> wrote:
>
> Converting size from size_t to int may overflow.
> v2: keep reverse xmas tree order (Christian)
>
> Signed-off-by: Jesse Zhang <Jesse.Zhang@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
> ---
> drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c | 5 +++--
> 1 file changed, 3 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
> index f5d0fa207a88..b62ae3c91a9d 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
> @@ -2065,12 +2065,13 @@ static ssize_t amdgpu_reset_dump_register_list_write(struct file *f,
> struct amdgpu_device *adev = (struct amdgpu_device *)file_inode(f)->i_private;
> char reg_offset[11];
> uint32_t *new = NULL, *tmp = NULL;
> - int ret, i = 0, len = 0;
> + unsigned int len = 0;
> + int ret, i = 0;
>
> do {
> memset(reg_offset, 0, 11);
> if (copy_from_user(reg_offset, buf + len,
> - min(10, ((int)size-len)))) {
> + min(10, (size-len)))) {
> ret = -EFAULT;
> goto error_free;
> }
> --
> 2.25.1
>
^ permalink raw reply [flat|nested] 4+ messages in thread
* [PATCH] drm/amdgpu: fix the warning about the expression (int)size - len
@ 2024-04-25 6:20 Jesse Zhang
2024-04-25 6:46 ` Christian König
0 siblings, 1 reply; 4+ messages in thread
From: Jesse Zhang @ 2024-04-25 6:20 UTC (permalink / raw)
To: amd-gfx
Cc: Alexander.Deucher, Christian Koenig, Tim.Huang, Jesse Zhang,
Jesse Zhang
Converting size from size_t to int may overflow.
Signed-off-by: Jesse Zhang <Jesse.Zhang@amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
index f5d0fa207a88..b828aad4f35e 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
@@ -2065,12 +2065,13 @@ static ssize_t amdgpu_reset_dump_register_list_write(struct file *f,
struct amdgpu_device *adev = (struct amdgpu_device *)file_inode(f)->i_private;
char reg_offset[11];
uint32_t *new = NULL, *tmp = NULL;
- int ret, i = 0, len = 0;
+ int ret, i = 0;
+ unsigned int len = 0;
do {
memset(reg_offset, 0, 11);
if (copy_from_user(reg_offset, buf + len,
- min(10, ((int)size-len)))) {
+ min(10, (size-len)))) {
ret = -EFAULT;
goto error_free;
}
--
2.25.1
^ permalink raw reply related [flat|nested] 4+ messages in thread* Re: [PATCH] drm/amdgpu: fix the warning about the expression (int)size - len
2024-04-25 6:20 Jesse Zhang
@ 2024-04-25 6:46 ` Christian König
0 siblings, 0 replies; 4+ messages in thread
From: Christian König @ 2024-04-25 6:46 UTC (permalink / raw)
To: Jesse Zhang, amd-gfx; +Cc: Alexander.Deucher, Tim.Huang
Am 25.04.24 um 08:20 schrieb Jesse Zhang:
> Converting size from size_t to int may overflow.
>
> Signed-off-by: Jesse Zhang <Jesse.Zhang@amd.com>
> ---
> drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c | 5 +++--
> 1 file changed, 3 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
> index f5d0fa207a88..b828aad4f35e 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
> @@ -2065,12 +2065,13 @@ static ssize_t amdgpu_reset_dump_register_list_write(struct file *f,
> struct amdgpu_device *adev = (struct amdgpu_device *)file_inode(f)->i_private;
> char reg_offset[11];
> uint32_t *new = NULL, *tmp = NULL;
> - int ret, i = 0, len = 0;
> + int ret, i = 0;
> + unsigned int len = 0;
Please keep reverse xmas tree order here, apart from that looks good to me.
Regards,
Christian.
>
> do {
> memset(reg_offset, 0, 11);
> if (copy_from_user(reg_offset, buf + len,
> - min(10, ((int)size-len)))) {
> + min(10, (size-len)))) {
> ret = -EFAULT;
> goto error_free;
> }
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2024-04-25 13:29 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz follow: Atom feed
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2024-04-25 7:17 [PATCH] drm/amdgpu: fix the warning about the expression (int)size - len Jesse Zhang
2024-04-25 13:29 ` Alex Deucher
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2024-04-25 6:20 Jesse Zhang
2024-04-25 6:46 ` Christian König
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