applications compiled with tsan (-fsanitize=thread) option fail to start with 3.19.0-41-generic kernel

Bug #1527599 reported by Dmitry on 2015-12-18
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
linux-lts-vivid (Ubuntu)
Undecided
Unassigned

Bug Description

Consider the following code:
# cat test.c
int main()
{
        return 0;
}

Now compile it with clang-3.5 and -fsanitize=thread option and run:
# clang-3.5 -fsanitize=thread -fPIE -pie test.c
# ./a.out
FATAL: ThreadSanitizer can not mmap the shadow memory (something is mapped at 0x5650b0bb2000 < 0x7cf000000000)
FATAL: Make sure to compile with -fPIE and to link with -pie.
# cat /proc/sys/kernel/randomize_va_space
2
# uname -a
Linux mikhin2 3.19.0-41-generic #46~14.04.2-Ubuntu SMP Tue Dec 8 17:46:10 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

This regression appears in 3.19.0-41-generic kernel. The example above runs fine (without FATAL errors) with previous 3.19.0-39-generic kernel.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.19.0-41-generic 3.19.0-41.46~14.04.2
ProcVersionSignature: Ubuntu 3.19.0-39.44~14.04.1-generic 3.19.8-ckt9
Uname: Linux 3.19.0-39-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.19
Architecture: amd64
CurrentDesktop: XFCE
Date: Fri Dec 18 14:53:45 2015
InstallationDate: Installed on 2015-12-14 (4 days ago)
InstallationMedia: Xubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805)
SourcePackage: linux-lts-vivid
UpgradeStatus: No upgrade log present (probably fresh install)

Dmitry (mikhin) wrote :
Dmitry (mikhin) on 2015-12-18
description: updated
summary: - applications compiled with tsan (-fsanitize=thread) option fails to
- start with 3.19.0-41-generic kernel
+ applications compiled with tsan (-fsanitize=thread) option fail to start
+ with 3.19.0-41-generic kernel
Dmitry (mikhin) wrote :

The problem is still present in 3.19.0-42-generic kernel.
After bisecting code, I've found that problem was introduced by 06ec92f3bac598a7a9b9ecf451ab1915929a5980 commit - http://kernel.ubuntu.com/git/ubuntu/ubuntu-vivid.git/commit/?id=06ec92f3bac598a7a9b9ecf451ab1915929a5980

Dmitry (mikhin) wrote :

https://github.com/google/sanitizers/issues/503
Looks like I should update compiler and not use -pie option any more.

To post a comment you must log in.
This report contains Public information  Edit
Everyone can see this information.

Other bug subscribers