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Guard against 0 byte writes in Pl_Buffer and Pl_String

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This commit is contained in:
m-holger 2024-08-07 16:19:16 +01:00
parent 6aa6c01303
commit 0663f1f8db
2 changed files with 6 additions and 0 deletions
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3
libqpdf/Pl_Buffer.cc
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@ -19,6 +19,9 @@ Pl_Buffer::~Pl_Buffer() // NOLINT (modernize-use-equals-default)
void void
Pl_Buffer::write(unsigned char const* buf, size_t len) Pl_Buffer::write(unsigned char const* buf, size_t len)
{ {
if (!len) {
return;
}
m->data.append(reinterpret_cast<char const*>(buf), len); m->data.append(reinterpret_cast<char const*>(buf), len);
m->ready = false; m->ready = false;

3
libqpdf/Pl_String.cc
View File

@ -21,6 +21,9 @@ Pl_String::~Pl_String() // NOLINT (modernize-use-equals-default)
void void
Pl_String::write(unsigned char const* buf, size_t len) Pl_String::write(unsigned char const* buf, size_t len)
{ {
if (!len) {
return;
}
m->s.append(reinterpret_cast<char const*>(buf), len); m->s.append(reinterpret_cast<char const*>(buf), len);
if (getNext(true)) { if (getNext(true)) {
getNext()->write(buf, len); getNext()->write(buf, len);