Public bug reported:
Description: uprobes: fix SIGSEGVs with setjmp/longjmp
Symptom:
Setting a user space return probe on a function that does not
return because of a longjmp call may cause SIGSEGV or SIGILL.
Problem:
Userspace can do whatever it wants with its stack. Especially
stack modifications performed with longjmp cannot be handled 100%
correctly within the uprobes kernel part, which may lead to user
space observed crashed.
Solution:
Implement arch_uretprobe_is_alive() which improves the situation
a lot and works for many situations.
Upstream-ID: 783c3b53b9506db3e05daacfe34e0287eebb09d8
** Affects: ubuntu-z-systems
Importance: High
Assignee: Canonical Kernel Team (canonical-kernel-team)
Status: Triaged
** Affects: linux (Ubuntu)
Importance: Undecided
Assignee: Skipper Bug Screeners (skipper-screen-team)
Status: New
** Tags: architecture-s39064 bugnameltc-169027 severity-high
targetmilestone-inin---
** Tags added: architecture-s39064 bugnameltc-169027 severity-high
targetmilestone-inin---
** Changed in: ubuntu
Assignee: (unassigned) => Skipper Bug Screeners (skipper-screen-team)
** Package changed: ubuntu => linux (Ubuntu)
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1777840
Title:
uprobes: fix SIGSEGVs with setjmp/longjmp
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu-z-systems/+bug/1777840/+subscriptions
--
ubuntu-bugs mailing list
[email protected]
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
