->buf_size_in_bytes must be large enough to hold ->num_watch_points and
->watch_mode so I have added a sizeof(int) * 2 to the minimum size.
Also we have to subtract sizeof(*args) from the max args_idx limit so
that it matches the allocation. Also I changed a > to >= for the last
compare.
I moved the if (aw_info.num_watch_points > MAX_WATCH_ADDRESSES) { check
here so that we don't get an integer overflow on 32bit systems. It's
harmless because we would have caught it later but it causes a static
checker warning. I had to add a new include to get the
MAX_WATCH_ADDRESSES define.
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
---
I feel like this patch is probably not going to be merged without
changes. Also we seem to set ->watch_address to the last address in the
buffer instead of the first? It is very strange. I am going on
vacation so I will be offline for a week. Yair, if this patch isn't
right then feel free to fix it and give me a Reported-by tag.
Otherwise, I will see everyone on the flip side. :)
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
index 96c904b..54a608a 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
@@ -36,6 +36,7 @@
#include "kfd_priv.h"
#include "kfd_device_queue_manager.h"
#include "kfd_dbgmgr.h"
+#include "../../radeon/cik_reg.h"
static long kfd_ioctl(struct file *, unsigned int, unsigned long);
static int kfd_open(struct inode *, struct file *);
@@ -553,7 +554,7 @@ static int kfd_ioctl_dbg_address_watch(struct file *filep,
/* Validate arguments */
if ((args->buf_size_in_bytes > MAX_ALLOWED_AW_BUFF_SIZE) ||
- (args->buf_size_in_bytes <= sizeof(*args)) ||
+ (args->buf_size_in_bytes <= sizeof(*args) + sizeof(int) * 2) ||
(cmd_from_user == NULL))
return -EINVAL;
@@ -576,6 +577,11 @@ static int kfd_ioctl_dbg_address_watch(struct file *filep,
aw_info.process = p;
aw_info.num_watch_points = *((uint32_t *)(&args_buff[args_idx]));
+ if (aw_info.num_watch_points == 0 ||
+ aw_info.num_watch_points > MAX_WATCH_ADDRESSES) {
+ kfree(args_buff);
+ return -EINVAL;
+ }
args_idx += sizeof(aw_info.num_watch_points);
aw_info.watch_mode = (enum HSA_DBG_WATCH_MODE *) &args_buff[args_idx];
@@ -590,7 +596,7 @@ static int kfd_ioctl_dbg_address_watch(struct file *filep,
/* skip over the addresses buffer */
args_idx += sizeof(aw_info.watch_address) * aw_info.num_watch_points;
- if (args_idx >= args->buf_size_in_bytes) {
+ if (args_idx >= args->buf_size_in_bytes - sizeof(*args)) {
kfree(args_buff);
return -EINVAL;
}
@@ -614,7 +620,7 @@ static int kfd_ioctl_dbg_address_watch(struct file *filep,
args_idx += sizeof(aw_info.watch_mask);
}
- if (args_idx > args->buf_size_in_bytes) {
+ if (args_idx >= args->buf_size_in_bytes - sizeof(args)) {
kfree(args_buff);
return -EINVAL;
}
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_dbgdev.c b/drivers/gpu/drm/amd/amdkfd/kfd_dbgdev.c
index 96153f2..d366757 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_dbgdev.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_dbgdev.c
@@ -301,12 +301,6 @@ static int dbgdev_address_watch_nodiq(struct kfd_dbgdev *dbgdev,
addrLo.u32All = 0;
cntl.u32All = 0;
- if ((adw_info->num_watch_points > MAX_WATCH_ADDRESSES) ||
- (adw_info->num_watch_points == 0)) {
- pr_err("amdkfd: num_watch_points is invalid\n");
- return -EINVAL;
- }
-
if ((adw_info->watch_mode == NULL) ||
(adw_info->watch_address == NULL)) {
pr_err("amdkfd: adw_info fields are not valid\n");
@@ -369,12 +363,6 @@ static int dbgdev_address_watch_diq(struct kfd_dbgdev *dbgdev,
addrLo.u32All = 0;
cntl.u32All = 0;
- if ((adw_info->num_watch_points > MAX_WATCH_ADDRESSES) ||
- (adw_info->num_watch_points == 0)) {
- pr_err("amdkfd: num_watch_points is invalid\n");
- return -EINVAL;
- }
-
if ((NULL == adw_info->watch_mode) ||
(NULL == adw_info->watch_address)) {
pr_err("amdkfd: adw_info fields are not valid\n");
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