diff options
| -rw-r--r-- | library/std/src/sys/unix/alloc.rs | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/library/std/src/sys/unix/alloc.rs b/library/std/src/sys/unix/alloc.rs index 8604b53983d..af0089978ec 100644 --- a/library/std/src/sys/unix/alloc.rs +++ b/library/std/src/sys/unix/alloc.rs @@ -86,7 +86,11 @@ cfg_if::cfg_if! { } else if #[cfg(target_os = "wasi")] { #[inline] unsafe fn aligned_malloc(layout: &Layout) -> *mut u8 { - libc::aligned_alloc(layout.align(), layout.size()) as *mut u8 + // C11 aligned_alloc requires that the size be a multiple of the alignment. + // Layout already checks that the size rounded up doesn't overflow isize::MAX. + let align = layout.align(); + let size = layout.size().next_multiple_of(align); + libc::aligned_alloc(align, size) as *mut u8 } } else { #[inline] |