musl - musl - an implementation of the standard library for Linux-based systems

diff --git a/src/malloc/malloc.c b/src/malloc/malloc.c
index 1a6d1493..4044eb2a 100644
--- a/src/malloc/malloc.c
+++ b/src/malloc/malloc.c

@@ -418,6 +418,9 @@ void *realloc(void *p, size_t n)

next = NEXT_CHUNK(self);

+ /* Crash on corrupted footer (likely from buffer overflow) */

+ if (next->psize != self->csize) a_crash();

+

/* Merge adjacent chunks if we need more space. This is not

* a waste of time even if we fail to get enough space, because our

* subsequent call to free would otherwise have to do the merge. */

@@ -471,6 +474,9 @@ void free(void *p)

final_size = new_size = CHUNK_SIZE(self);

next = NEXT_CHUNK(self);

+ /* Crash on corrupted footer (likely from buffer overflow) */

+ if (next->psize != self->csize) a_crash();

+

for (;;) {

/* Replace middle of large chunks with fresh zero pages */

if (reclaim && (self->psize & next->csize & C_INUSE)) {