** Description changed:
[Impact]
libmozjs24 does not support 48-bit virtual addresses on arm64. 48-bit virtual
addresses are enabled in the Ubuntu 16.04 kernel (though not on the kernel used
on the buildds). This causes applications to crash.
[Test Case]
- apt source mozjs24
- sudo apt build-dep -y mozjs24
- sudo apt install -y fakeroot
- cd mozjs24-24.2.0
- fakeroot make -f debian/rules build
- cd js/src
- make
- ./jsapi-tests/jsapi-tests
-
- Unpatched source crashes for me immediately on xenial:
- dannf@mustang:~/mozjs24-24.2.0/js/src$ ./jsapi-tests/jsapi-tests
- testXDR_sourceMap
+ = mozjs =
+ $ sudo apt install couchdb-bin
+ $ couchjs a.js
Segmentation fault
- All tests pass w/ patched source
+ = mozjs24 =
+ $ cat a.js
+ print("hello")
+ $ js24 a.js
+ Segmentation fault
- [Regression Risk]
- I'd suggest running through the jsapi-tests on each supported Ubuntu
architecture. I've only ran it on arm64 so far.
+ [Regression Risk]
+ The fix for mozjs24 is ifdef'd to only apply to arm64. Since arm64 is
currently segfaulting with a very simple program, there's very little chance of
making things worse.
** Changed in: mozjs24 (Ubuntu Xenial)
Status: Triaged => In Progress
** Changed in: mozjs24 (Ubuntu Xenial)
Assignee: (unassigned) => dann frazier (dannf)
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1571017
Title:
[arm64] libmozjs24 crashes w/ 48-bit VA
To manage notifications about this bug go to:
https://bugs.launchpad.net/mozjs/+bug/1571017/+subscriptions
--
ubuntu-bugs mailing list
[email protected]
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
