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[uclibc-ng-devel] Fix NULL pointer dereference in open_memstream()

Message ID CAPmKWpG+tiYAu6gP177E8FiTYGXe0dSdd6ahfzx0pfEqLOSTaA@mail.gmail.com
State Accepted
Headers show
Series [uclibc-ng-devel] Fix NULL pointer dereference in open_memstream() | expand

Commit Message

Eugene Yudin Feb. 22, 2019, 4:47 p.m. UTC

Current version of uClibc-ng has issue in open_memstream() function.
If the cookie variable is NULL (due malloc() fail) then null pointer is
dereferenced after if block.

The attached patch fixes this issue.
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diff --git a/libc/stdio/open_memstream.c b/libc/stdio/open_memstream.c
index 17ef191cb..71a84138d 100644
--- a/libc/stdio/open_memstream.c
+++ b/libc/stdio/open_memstream.c
@@ -156,9 +156,10 @@  FILE *open_memstream(char **bufloc, size_t *sizeloc)
 			return fp;
+		free(cookie->buf);
-	free(cookie->buf);