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| author | Robert Griesemer <gri@google.com> | 2026-03-30 12:27:31 -0700 |
|---|---|---|
| committer | Gopher Robot <gobot@golang.org> | 2026-03-30 13:36:41 -0700 |
| commit | ed3ec75df47ab8e7d6e4a30c445a8ef771382584 (patch) | |
| tree | 3fcedc8fc366052dda1403c782fd10bfbcbb7dd7 /src/cmd | |
| parent | a4b534f5e42fe58d58c0ff0562d76680cedb0466 (diff) | |
| download | go-ed3ec75df47ab8e7d6e4a30c445a8ef771382584.tar.xz | |
go/types, types2: report an error if constant string overflows
Set a limit of 10 GiB for strings obtained via constant string addition.
Fixes #78346.
Change-Id: I35dbdff94f3ed32bf69654f4b3da435dad9f6236
Reviewed-on: https://go-review.googlesource.com/c/go/+/761300
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Auto-Submit: Robert Griesemer <gri@google.com>
Reviewed-by: Mark Freeman <markfreeman@google.com>
Reviewed-by: Robert Griesemer <gri@google.com>
Reviewed-by: Jakub Ciolek <jakub@ciolek.dev>
Diffstat (limited to 'src/cmd')
| -rw-r--r-- | src/cmd/compile/internal/types2/const.go | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/cmd/compile/internal/types2/const.go b/src/cmd/compile/internal/types2/const.go index 74f45a6e8b..096187f515 100644 --- a/src/cmd/compile/internal/types2/const.go +++ b/src/cmd/compile/internal/types2/const.go @@ -46,6 +46,14 @@ func (check *Checker) overflow(x *operand, opPos syntax.Pos) { } check.errorf(atPos(opPos), InvalidConstVal, "constant %soverflow", op) x.val = constant.MakeUnknown() + return + } + + const maxLen = 10 * 1024 * 1024 + if x.val.Kind() == constant.String && len(constant.StringVal(x.val)) > maxLen { + check.error(atPos(opPos), InvalidConstVal, "constant string too long") + x.val = constant.MakeUnknown() + return } } |