diff options
| author | Jordan Crouse <jcrouse@codeaurora.org> | 2019-02-19 11:40:19 -0700 |
|---|---|---|
| committer | Rob Clark <robdclark@gmail.com> | 2019-02-19 14:54:08 -0500 |
| commit | 860433ed2a55dcd18f36c61b3c4fdb12dc76c869 (patch) | |
| tree | 86a3ec5a53285fa192fd0a6ab8d99ecf4797cb27 /drivers/gpu/drm/msm | |
| parent | 7cce8e4efe5e782e130f79f8d55fdad48f2db52d (diff) | |
| download | linux-860433ed2a55dcd18f36c61b3c4fdb12dc76c869.tar.gz | |
drm/msm: Truncate the buffer object name if the copy from user failed
(Resend since there was a compile error that I forgot to commit before sending)
If there is a error while doing a copy_from_user() for MSM_INFO_SET_NAME
make sure to truncate the object name so that there isn't a chance that
we'll have random data in the string.
This is on top of [1] reported and fixed by Dan Carpenter.
[1] https://patchwork.freedesktop.org/series/56656/
Fixes: f05c83e77460 ("drm/msm: add uapi to get/set debug name")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>
Diffstat (limited to 'drivers/gpu/drm/msm')
| -rw-r--r-- | drivers/gpu/drm/msm/msm_drv.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c index 87eae44a1006..906b2bb79f6a 100644 --- a/drivers/gpu/drm/msm/msm_drv.c +++ b/drivers/gpu/drm/msm/msm_drv.c @@ -852,8 +852,11 @@ static int msm_ioctl_gem_info(struct drm_device *dev, void *data, break; } if (copy_from_user(msm_obj->name, u64_to_user_ptr(args->value), - args->len)) + args->len)) { + msm_obj->name[0] = '\0'; ret = -EFAULT; + break; + } msm_obj->name[args->len] = '\0'; for (i = 0; i < args->len; i++) { if (!isprint(msm_obj->name[i])) { |