[Bug 29340] New: missing copy_from_user? radeon_info_ioctl

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=29340

           Summary: missing copy_from_user? radeon_info_ioctl
           Product: DRI
           Version: unspecified
          Platform: Other
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Radeon
        AssignedTo: dri-devel at lists.freedesktop.org
        ReportedBy: freedesktop at treblig.org


2.6.35 kernel as of git/ubuntu 2.6.35-13.18

In radeon_kms.c there is :


int radeon_info_ioctl(struct drm_device *dev, void *data, struct drm_file
*filp)
{
        struct radeon_device *rdev = dev->dev_private;
        struct drm_radeon_info *info;
        struct radeon_mode_info *minfo = &rdev->mode_info;
        uint32_t *value_ptr;
        uint32_t value;
        struct drm_crtc *crtc;
        int i, found;

        info = data;
        value_ptr = (uint32_t *)((unsigned long)info->value);
        value = *value_ptr;

I think that *value_ptr should be done with a DRM_COPY_FROM_USER since I'm
managing to trigger an oops from it.
(see ubuntu bug 606081)

Dave

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