patch 9.0.1857: [security] heap-use-after-free in is_qf_win()
Problem: heap-use-after-free in is_qf_win()
Solution: Check buffer is valid before accessing it
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/main.c b/src/main.c
index cca53fe..a40c3a6 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1646,7 +1646,7 @@
next_tp = tp->tp_next;
FOR_ALL_WINDOWS_IN_TAB(tp, wp)
{
- if (wp->w_buffer == NULL)
+ if (wp->w_buffer == NULL || !buf_valid(wp->w_buffer))
// Autocmd must have close the buffer already, skip.
continue;
buf = wp->w_buffer;