5.15-stable review patch. If anyone has any objections, please let me know.
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From: Philip Yang Philip.Yang@amd.com
commit b671cd3d456315f63171a670769356a196cf7fd0 upstream.
Without unsigned long typecast, the size is passed in as zero if page array size >= 4GB, nr_pages >= 0x100000, then sg list converted will have the first and the last chunk lost.
Signed-off-by: Philip Yang Philip.Yang@amd.com Acked-by: Felix Kuehling Felix.Kuehling@amd.com Reviewed-by: Christian König christian.koenig@amd.com CC: stable@vger.kernel.org Signed-off-by: Christian König christian.koenig@amd.com Link: https://patchwork.freedesktop.org/patch/msgid/20230821200201.24685-1-Philip.... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/gpu/drm/drm_prime.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/gpu/drm/drm_prime.c +++ b/drivers/gpu/drm/drm_prime.c @@ -825,7 +825,7 @@ struct sg_table *drm_prime_pages_to_sg(s if (max_segment == 0) max_segment = UINT_MAX; err = sg_alloc_table_from_pages_segment(sg, pages, nr_pages, 0, - nr_pages << PAGE_SHIFT, + (unsigned long)nr_pages << PAGE_SHIFT, max_segment, GFP_KERNEL); if (err) { kfree(sg);