diff options
| author | Ingo Molnar <mingo@kernel.org> | 2018-03-31 07:30:17 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2018-03-31 07:30:17 +0200 |
| commit | 169310f71fc820fe153ec04c6a111e444a68d6d5 (patch) | |
| tree | a586d0f08548159ceb8527ff59f8414579f70c1f /drivers/gpu/drm/udl/udl_fb.c | |
| parent | b3c39758c8a6972f02b43f83dba7fe7a352371b9 (diff) | |
| parent | c2a9838452a4d71f76103c18c926468a9ea05713 (diff) | |
| download | talos-op-linux-169310f71fc820fe153ec04c6a111e444a68d6d5.tar.gz talos-op-linux-169310f71fc820fe153ec04c6a111e444a68d6d5.zip | |
Merge branch 'linus' into locking/core, to pick up fixes
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'drivers/gpu/drm/udl/udl_fb.c')
| -rw-r--r-- | drivers/gpu/drm/udl/udl_fb.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/gpu/drm/udl/udl_fb.c b/drivers/gpu/drm/udl/udl_fb.c index b5b335c9b2bb..2ebdc6d5a76e 100644 --- a/drivers/gpu/drm/udl/udl_fb.c +++ b/drivers/gpu/drm/udl/udl_fb.c @@ -159,10 +159,15 @@ static int udl_fb_mmap(struct fb_info *info, struct vm_area_struct *vma) { unsigned long start = vma->vm_start; unsigned long size = vma->vm_end - vma->vm_start; - unsigned long offset = vma->vm_pgoff << PAGE_SHIFT; + unsigned long offset; unsigned long page, pos; - if (offset + size > info->fix.smem_len) + if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT)) + return -EINVAL; + + offset = vma->vm_pgoff << PAGE_SHIFT; + + if (offset > info->fix.smem_len || size > info->fix.smem_len - offset) return -EINVAL; pos = (unsigned long)info->fix.smem_start + offset; |
