diff options
Diffstat (limited to 'malloc/malloc.c')
| -rw-r--r-- | malloc/malloc.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/malloc/malloc.c b/malloc/malloc.c index 5cc3473ae2..55e2cbc0cd 100644 --- a/malloc/malloc.c +++ b/malloc/malloc.c @@ -4131,6 +4131,13 @@ _int_free(mstate av, Void_t* mem) p = mem2chunk(mem); size = chunksize(p); + /* Little security check which won't hurt performance: the + allocator never wrapps around at the end of the address space. + Therefore we can exclude some size values which might appear + here by accident or by "design" from some intruder. */ + if ((uintptr_t) p > (uintptr_t) -size) + return; + check_inuse_chunk(av, p); /* |