Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

buffer: throw range error before truncating write #5605

Closed
wants to merge 1 commit into from
Closed

buffer: throw range error before truncating write #5605

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
6 changes: 3 additions & 3 deletions src/node_buffer.cc
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -794,14 +794,14 @@ void WriteFloatGeneric(const FunctionCallbackInfo<Value>& args) {
size_t offset = args[2]->IntegerValue(env->context()).FromMaybe(0);

size_t memcpy_num = sizeof(T);
if (offset + sizeof(T) > ts_obj_length)
memcpy_num = ts_obj_length - offset;

if (should_assert) {
CHECK_NOT_OOB(offset + memcpy_num >= memcpy_num);
CHECK_NOT_OOB(offset + memcpy_num <= ts_obj_length);
}
CHECK_LE(offset + memcpy_num, ts_obj_length);

if (offset + memcpy_num > ts_obj_length)
memcpy_num = ts_obj_length - offset;

union NoAlias {
T val;
Expand Down
10 changes: 10 additions & 0 deletions test/parallel/test-buffer.js
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -1041,6 +1041,16 @@ assert.throws(function() {
new Buffer(0xFFFFFFFFF);
}, RangeError);

// issue GH-5587
assert.throws(function() {
var buf = new Buffer(8);
buf.writeFloatLE(0, 5);
}, RangeError);
assert.throws(function() {
var buf = new Buffer(16);
buf.writeDoubleLE(0, 9);
}, RangeError);


// attempt to overflow buffers, similar to previous bug in array buffers
assert.throws(function() {
Expand Down