Messages in this thread Patch in this message | | | From | Sherry Yang <> | Subject | [PATCH v2 2/4] android: binder: Fix null ptr dereference in debug msg | Date | Fri, 20 Oct 2017 20:58:59 -0400 |
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Don't access next->data in kernel debug message when the next buffer is null.
Acked-by: Arve Hjønnevåg <arve@android.com> Signed-off-by: Sherry Yang <sherryy@android.com> --- drivers/android/binder_alloc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
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); -- 2.11.0 (Apple Git-81)
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