From: Sherry Yang Date: Sat, 21 Oct 2017 00:58:59 +0000 (-0400) Subject: android: binder: Fix null ptr dereference in debug msg X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=ae65c8510f3319dfb2114cc48d476b81232e27b3;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git android: binder: Fix null ptr dereference in debug msg Don't access next->data in kernel debug message when the next buffer is null. Acked-by: Arve Hjønnevåg Signed-off-by: Sherry Yang Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/android/binder_alloc.c b/drivers/android/binder_alloc.c index e12072b1d507..c2819a3d58a6 100644 --- a/drivers/android/binder_alloc.c +++ b/drivers/android/binder_alloc.c @@ -560,7 +560,7 @@ static void binder_delete_free_buffer(struct binder_alloc *alloc, binder_alloc_debug(BINDER_DEBUG_BUFFER_ALLOC, "%d: merge free, buffer %pK do not share page with %pK or %pK\n", alloc->pid, buffer->data, - prev->data, next->data); + prev->data, next ? next->data : NULL); binder_update_page_range(alloc, 0, buffer_start_page(buffer), buffer_start_page(buffer) + PAGE_SIZE, NULL);