b39e0f461c
Ironically, checkptrAlignment had a latent case of bad pointer arithmetic: if ptr is nil, then `add(ptr, size-1)` might produce an illegal pointer value. The fix is to simply check for nil at the top of checkptrAlignment, and short-circuit if so. This CL also adds a more explicit bounds check in checkptrStraddles, rather than relying on `add(ptr, size-1)` to wrap around. I don't think this is necessary today, but it seems prudent to be careful. Fixes #47430. Change-Id: I5c50b2f7f41415dbebbd803e1b8e7766ca95e1fd Reviewed-on: https://go-review.googlesource.com/c/go/+/338029 Trust: Matthew Dempsky <mdempsky@google.com> Run-TryBot: Matthew Dempsky <mdempsky@google.com> TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: Keith Randall <khr@golang.org> |
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