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| author | Dan Carpenter <dan.carpenter@oracle.com> | 2015-06-16 10:49:32 (GMT) |
|---|---|---|
| committer | Oded Gabbay <oded.gabbay@gmail.com> | 2015-06-16 12:42:26 (GMT) |
| commit | 7861c7a4ca5c637f3cad1e343602a15e857140fd (patch) | |
| tree | 00f1595dd1de98ce349596b1fddff9e3a09ed7bc /drivers/gpu/drm/amd/amdkfd/kfd_chardev.c | |
| parent | 6876f98bfe7751a9ee0cd88390912df305e25183 (diff) | |
| download | linux-7861c7a4ca5c637f3cad1e343602a15e857140fd.tar.xz | |
drm/amdkfd: fix some range checks in address watch ioctl
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.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdkfd/kfd_chardev.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdkfd/kfd_chardev.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c index 96c904b..c991973 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c @@ -553,7 +553,7 @@ 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; @@ -590,7 +590,7 @@ 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 +614,7 @@ 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; } |