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debug/macho: use saferio to read symbol table strings

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No test case because the problem can only happen for invalid data. Let
the fuzzer find cases like this.

For #47653
Fixes #58603

Change-Id: I67fc45365c1a5b0b4b381f541bf2fee8ce8ddc3a
Reviewed-on: https://go-review.googlesource.com/c/go/+/469895
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Ian Lance Taylor <iant@google.com>
Reviewed-by: Bryan Mills <bcmills@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
This commit is contained in:
Ian Lance Taylor 2023-02-21 10:14:20 -08:00 committed by Gopher Robot
parent dd87e33d88
commit ed33ae10a0
1 changed files with 2 additions and 2 deletions
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4
src/debug/macho/file.go
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@ -323,8 +323,8 @@ func NewFile(r io.ReaderAt) (*File, error) {
if err := binary.Read(b, bo, &hdr); err != nil {
return nil, err
}
strtab := make([]byte, hdr.Strsize)
if _, err := r.ReadAt(strtab, int64(hdr.Stroff)); err != nil {
strtab, err := saferio.ReadDataAt(r, uint64(hdr.Strsize), int64(hdr.Stroff))
if err != nil {
return nil, err
}
var symsz int