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cmd/compile,runtime: panic when unsafe.Slice param is nil and > 0

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Fixes #54092

Change-Id: Ib917922ed36ee5410e5515f812737203c44f46ae
GitHub-Last-Rev: dfd0c3883c
GitHub-Pull-Request: golang/go#54107
Reviewed-on: https://go-review.googlesource.com/c/go/+/419755
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Reviewed-by: Than McIntosh <thanm@google.com>
Reviewed-by: Keith Randall <khr@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
This commit is contained in:
cuiweixie 2022-08-08 16:07:05 +00:00 • committed by Keith Randall
parent 1519729c6a
commit 52d0667e6b
4 changed files with 45 additions and 0 deletions
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6
src/runtime/slice.go
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@ -129,6 +129,12 @@ func unsafeslice(et *_type, ptr unsafe.Pointer, len int) {
panicunsafeslicelen()
}
if et.size == 0 {
if ptr == nil && len > 0 {
panicunsafeslicenilptr()
}
}
mem, overflow := math.MulUintptr(et.size, uintptr(len))
if overflow || mem > -uintptr(ptr) {
if ptr == nil {