[PATCH] drm/amdgpu: refine amdgpu_fru_get_product_info
Gui, Jack
Jack.Gui at amd.com
Tue May 25 08:17:47 UTC 2021
Reviewed-by: Jack Gui <Jack.Gui at amd.com>
-----Original Message-----
From: amd-gfx <amd-gfx-bounces at lists.freedesktop.org> On Behalf Of Chen, Jiansong (Simon)
Sent: Tuesday, May 25, 2021 4:07 PM
To: Chen, Guchun <Guchun.Chen at amd.com>; amd-gfx at lists.freedesktop.org
Subject: RE: [PATCH] drm/amdgpu: refine amdgpu_fru_get_product_info
I think we still could keep them to be more informative for the moment.
Regards,
Jiansong
-----Original Message-----
From: Chen, Guchun <Guchun.Chen at amd.com>
Sent: Tuesday, May 25, 2021 3:47 PM
To: Chen, Jiansong (Simon) <Jiansong.Chen at amd.com>; amd-gfx at lists.freedesktop.org
Cc: Chen, Jiansong (Simon) <Jiansong.Chen at amd.com>
Subject: RE: [PATCH] drm/amdgpu: refine amdgpu_fru_get_product_info
[AMD Public Use]
+ len = size;
/* Serial number should only be 16 characters. Any more,
* and something could be wrong. Cap it at 16 to be safe
*/
- if (size > 16) {
+ if (len >= sizeof(adev->serial)) {
DRM_WARN("FRU Serial Number is larger than 16 characters. This is likely a mistake");
- size = 16;
+ len = sizeof(adev->serial) - 1;
}
The hardcoded '16' in comment/warning printing needs to be dropped as well?
Regards,
Guchun
-----Original Message-----
From: amd-gfx <amd-gfx-bounces at lists.freedesktop.org> On Behalf Of Jiansong Chen
Sent: Tuesday, May 25, 2021 2:42 PM
To: amd-gfx at lists.freedesktop.org
Cc: Chen, Jiansong (Simon) <Jiansong.Chen at amd.com>
Subject: [PATCH] drm/amdgpu: refine amdgpu_fru_get_product_info
1. eliminate potential array index out of bounds.
2. return meaningful value for failure.
Signed-off-by: Jiansong Chen <Jiansong.Chen at amd.com>
Change-Id: I9be36eb2e42ee46cd00464b0f2c35a4e4ea213e3
---
.../gpu/drm/amd/amdgpu/amdgpu_fru_eeprom.c | 42 ++++++++++---------
1 file changed, 23 insertions(+), 19 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_fru_eeprom.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_fru_eeprom.c
index 8f4a8f8d8146..39b6c6bfab45 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_fru_eeprom.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_fru_eeprom.c
@@ -101,7 +101,8 @@ static int amdgpu_fru_read_eeprom(struct amdgpu_device *adev, uint32_t addrptr, int amdgpu_fru_get_product_info(struct amdgpu_device *adev) {
unsigned char buff[34];
- int addrptr = 0, size = 0;
+ int addrptr, size;
+ int len;
if (!is_fru_eeprom_supported(adev))
return 0;
@@ -109,7 +110,7 @@ int amdgpu_fru_get_product_info(struct amdgpu_device *adev)
/* If algo exists, it means that the i2c_adapter's initialized */
if (!adev->pm.smu_i2c.algo) {
DRM_WARN("Cannot access FRU, EEPROM accessor not initialized");
- return 0;
+ return -ENODEV;
}
/* There's a lot of repetition here. This is due to the FRU having @@ -128,7 +129,7 @@ int amdgpu_fru_get_product_info(struct amdgpu_device *adev)
size = amdgpu_fru_read_eeprom(adev, addrptr, buff);
if (size < 1) {
DRM_ERROR("Failed to read FRU Manufacturer, ret:%d", size);
- return size;
+ return -EINVAL;
}
/* Increment the addrptr by the size of the field, and 1 due to the @@ -138,43 +139,45 @@ int amdgpu_fru_get_product_info(struct amdgpu_device *adev)
size = amdgpu_fru_read_eeprom(adev, addrptr, buff);
if (size < 1) {
DRM_ERROR("Failed to read FRU product name, ret:%d", size);
- return size;
+ return -EINVAL;
}
+ len = size;
/* Product name should only be 32 characters. Any more,
* and something could be wrong. Cap it at 32 to be safe
*/
- if (size > 32) {
+ if (len >= sizeof(adev->product_name)) {
DRM_WARN("FRU Product Number is larger than 32 characters. This is likely a mistake");
- size = 32;
+ len = sizeof(adev->product_name) - 1;
}
/* Start at 2 due to buff using fields 0 and 1 for the address */
- memcpy(adev->product_name, &buff[2], size);
- adev->product_name[size] = '\0';
+ memcpy(adev->product_name, &buff[2], len);
+ adev->product_name[len] = '\0';
addrptr += size + 1;
size = amdgpu_fru_read_eeprom(adev, addrptr, buff);
if (size < 1) {
DRM_ERROR("Failed to read FRU product number, ret:%d", size);
- return size;
+ return -EINVAL;
}
+ len = size;
/* Product number should only be 16 characters. Any more,
* and something could be wrong. Cap it at 16 to be safe
*/
- if (size > 16) {
+ if (len >= sizeof(adev->product_number)) {
DRM_WARN("FRU Product Number is larger than 16 characters. This is likely a mistake");
- size = 16;
+ len = sizeof(adev->product_number) - 1;
}
- memcpy(adev->product_number, &buff[2], size);
- adev->product_number[size] = '\0';
+ memcpy(adev->product_number, &buff[2], len);
+ adev->product_number[len] = '\0';
addrptr += size + 1;
size = amdgpu_fru_read_eeprom(adev, addrptr, buff);
if (size < 1) {
DRM_ERROR("Failed to read FRU product version, ret:%d", size);
- return size;
+ return -EINVAL;
}
addrptr += size + 1;
@@ -182,18 +185,19 @@ int amdgpu_fru_get_product_info(struct amdgpu_device *adev)
if (size < 1) {
DRM_ERROR("Failed to read FRU serial number, ret:%d", size);
- return size;
+ return -EINVAL;
}
+ len = size;
/* Serial number should only be 16 characters. Any more,
* and something could be wrong. Cap it at 16 to be safe
*/
- if (size > 16) {
+ if (len >= sizeof(adev->serial)) {
DRM_WARN("FRU Serial Number is larger than 16 characters. This is likely a mistake");
- size = 16;
+ len = sizeof(adev->serial) - 1;
}
- memcpy(adev->serial, &buff[2], size);
- adev->serial[size] = '\0';
+ memcpy(adev->serial, &buff[2], len);
+ adev->serial[len] = '\0';
return 0;
}
--
2.25.1
_______________________________________________
amd-gfx mailing list
amd-gfx at lists.freedesktop.org
https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.freedesktop.org%2Fmailman%2Flistinfo%2Famd-gfx&data=04%7C01%7CJack.Gui%40amd.com%7C9587f3c2d6c84b28b3b808d91f540388%7C3dd8961fe4884e608e11a82d994e183d%7C0%7C0%7C637575267971455391%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=Q4S%2B%2F4E9BnaIwzra%2FyRRdF%2BD75QhTVKEdqLfQxFMOTs%3D&reserved=0
_______________________________________________
amd-gfx mailing list
amd-gfx at lists.freedesktop.org
https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.freedesktop.org%2Fmailman%2Flistinfo%2Famd-gfx&data=04%7C01%7CJack.Gui%40amd.com%7C9587f3c2d6c84b28b3b808d91f540388%7C3dd8961fe4884e608e11a82d994e183d%7C0%7C0%7C637575267971455391%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=Q4S%2B%2F4E9BnaIwzra%2FyRRdF%2BD75QhTVKEdqLfQxFMOTs%3D&reserved=0
More information about the amd-gfx
mailing list