Skip to content

tty: validate file descriptor to avoid int32 overflow #37809

New issue

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

#

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

Already on GitHub? # to your account

Merged
merged 1 commit into from
Mar 23, 2021
Merged

tty: validate file descriptor to avoid int32 overflow #37809

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
3 changes: 2 additions & 1 deletion lib/tty.js
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -40,7 +40,8 @@ const {
let readline;

function isatty(fd) {
return NumberIsInteger(fd) && fd >= 0 && isTTY(fd);
return NumberIsInteger(fd) && fd >= 0 && fd <= 2147483647 &&
isTTY(fd);
}

function ReadStream(fd, options) {
Expand Down
1 change: 1 addition & 0 deletions test/pseudo-tty/test-tty-isatty.js
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -10,6 +10,7 @@ strictEqual(isatty(2), true, 'stderr reported to not be a tty, but it is');

strictEqual(isatty(-1), false, '-1 reported to be a tty, but it is not');
strictEqual(isatty(55555), false, '55555 reported to be a tty, but it is not');
strictEqual(isatty(2 ** 31), false, '2^31 reported to be a tty, but it is not');
strictEqual(isatty(1.1), false, '1.1 reported to be a tty, but it is not');
strictEqual(isatty('1'), false, '\'1\' reported to be a tty, but it is not');
strictEqual(isatty({}), false, '{} reported to be a tty, but it is not');
Expand Down