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windows/registry: do not panic when data is large

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Allow registry blobs to be as large as 500MB

Copy of CL 14287.

Fixes golang/go#12493

Change-Id: I37b82fcf90ff2acef83c66016375fcae15e6eefc
Reviewed-on: https://go-review.googlesource.com/14288
Reviewed-by: Ian Lance Taylor <iant@golang.org>
This commit is contained in:
Alex Brainman
2015-09-09 02:29:49 +00:00
parent e6e5e023fc
commit 16e60ce682
1 changed files with 5 additions and 5 deletions
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windows/registry/value.go
+5 -5
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@@ -108,7 +108,7 @@ func (k Key) GetStringValue(name string) (val string, valtype uint32, err error)
if len(data) == 0 { if len(data) == 0 {
return "", typ, nil return "", typ, nil
} }
u := (*[1 << 10]uint16)(unsafe.Pointer(&data[0]))[:] u := (*[1 << 29]uint16)(unsafe.Pointer(&data[0]))[:]
return syscall.UTF16ToString(u), typ, nil return syscall.UTF16ToString(u), typ, nil
} }
@@ -185,7 +185,7 @@ func ExpandString(value string) (string, error) {
return "", err return "", err
} }
if n <= uint32(len(r)) { if n <= uint32(len(r)) {
u := (*[1 << 15]uint16)(unsafe.Pointer(&r[0]))[:] u := (*[1 << 29]uint16)(unsafe.Pointer(&r[0]))[:]
return syscall.UTF16ToString(u), nil return syscall.UTF16ToString(u), nil
} }
r = make([]uint16, n) r = make([]uint16, n)
@@ -208,7 +208,7 @@ func (k Key) GetStringsValue(name string) (val []string, valtype uint32, err err
if len(data) == 0 { if len(data) == 0 {
return nil, typ, nil return nil, typ, nil
} }
p := (*[1 << 24]uint16)(unsafe.Pointer(&data[0]))[:len(data)/2] p := (*[1 << 29]uint16)(unsafe.Pointer(&data[0]))[:len(data)/2]
if len(p) == 0 { if len(p) == 0 {
return nil, typ, nil return nil, typ, nil
} }
@@ -296,7 +296,7 @@ func (k Key) setStringValue(name string, valtype uint32, value string) error {
if err != nil { if err != nil {
return err return err
} }
buf := (*[1 << 10]byte)(unsafe.Pointer(&v[0]))[:len(v)*2] buf := (*[1 << 29]byte)(unsafe.Pointer(&v[0]))[:len(v)*2]
return k.setValue(name, valtype, buf) return k.setValue(name, valtype, buf)
} }
@@ -326,7 +326,7 @@ func (k Key) SetStringsValue(name string, value []string) error {
ss += s + "\x00" ss += s + "\x00"
} }
v := utf16.Encode([]rune(ss + "\x00")) v := utf16.Encode([]rune(ss + "\x00"))
buf := (*[1 << 10]byte)(unsafe.Pointer(&v[0]))[:len(v)*2] buf := (*[1 << 29]byte)(unsafe.Pointer(&v[0]))[:len(v)*2]
return k.setValue(name, MULTI_SZ, buf) return k.setValue(name, MULTI_SZ, buf)
} }