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Fix issue 5741, use after free

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This commit is contained in:
Jonathan Marler
2020-06-28 14:33:41 -06:00
committed by Andrew Kelley
parent 374e3e42e0
commit c2eead9629
2 changed files with 5 additions and 3 deletions
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3
lib/std/mem.zig
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@@ -116,9 +116,6 @@ pub const Allocator = struct {
if (isAligned(@ptrToInt(old_mem.ptr), new_alignment)) {
if (new_byte_count <= old_mem.len) {
const shrunk_len = self.shrinkBytes(old_mem, new_byte_count, len_align);
if (shrunk_len < old_mem.len) {
@memset(old_mem.ptr + shrunk_len, undefined, old_mem.len - shrunk_len);
}
return old_mem.ptr[0..shrunk_len];
}
if (self.callResizeFn(old_mem, new_byte_count, len_align)) |resized_len| {