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internal/xcoff: better handling of malformed symbol tables

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Check for malformed data when reading the number of aux
symbols associated with a symbol table entry.

Fixes #54584.

Change-Id: Ic2a8d4d6a1d481d585a065b8182de86294c3d3d1
Reviewed-on: https://go-review.googlesource.com/c/go/+/425049
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Run-TryBot: Than McIntosh <thanm@google.com>
This commit is contained in:
Than McIntosh 2022-08-22 07:59:49 -04:00
parent bdecfcb5fc
commit db3e915af2
1 changed files with 6 additions and 0 deletions
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6
src/internal/xcoff/file.go
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@ -283,6 +283,9 @@ func NewFile(r io.ReaderAt) (*File, error) {
return nil, err
}
numaux = int(se.Nnumaux)
if numaux < 0 {
return nil, fmt.Errorf("malformed symbol table, invalid number of aux symbols")
}
sym.SectionNumber = int(se.Nscnum)
sym.StorageClass = int(se.Nsclass)
sym.Value = uint64(se.Nvalue)
@ -303,6 +306,9 @@ func NewFile(r io.ReaderAt) (*File, error) {
return nil, err
}
numaux = int(se.Nnumaux)
if numaux < 0 {
return nil, fmt.Errorf("malformed symbol table, invalid number of aux symbols")
}
sym.SectionNumber = int(se.Nscnum)
sym.StorageClass = int(se.Nsclass)
sym.Value = se.Nvalue