I just tested this on:
Linux vdso-test 4.6.0-9-generic #11-Ubuntu SMP Wed Jul 13 22:17:41 UTC
2016 x86_64 x86_64 x86_64 GNU/Linux
and it seems to be fixed, so I'll close this for now.
** Changed in: linux (Ubuntu Yakkety)
Status: Triaged => Invalid
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Hi Tim,
I just tested this in a fresh yakkety VM using the daily cloud images
and the kernel team PPA you mentioned and reproduced it with your
program:
ubuntu@yakkety:~$ strace ./tester
execve("./tester", ["./tester"], [/* 17 vars */]) = 0
brk(NULL) =
Hmm, bare metal Yakkety with the same 4.6.0-7.8 kernel works. I attached
the copy of tester.c that I'm using.
** Attachment added: "Test program"
https://bugs.launchpad.net/ubuntu/yakkety/+source/linux/+bug/1590069/+attachment/4679067/+files/tester.c
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On Tue, Jun 07, 2016 at 05:23:58PM -, Tim Gardner wrote:
> Tycho - I cannot reproduce this on bare metal running linux 4.6.0-7.8
> from ppa:canonical-kernel-team/ppa using Xenial user space. Lemme try
> Yakkety user space.
The kernel I used had a 4.6.0-8 version number, I assume because I'm
Tycho - I cannot reproduce this on bare metal running linux 4.6.0-7.8
from ppa:canonical-kernel-team/ppa using Xenial user space. Lemme try
Yakkety user space.
** Also affects: linux (Ubuntu Yakkety)
Importance: Undecided
Status: Incomplete
** Changed in: linux (Ubuntu Yakkety)
A nice canary for this is that there's no .dynamic section in vdso.so:
$ readelf --program-headers arch/x86/entry/vdso/vdso64.so
Elf file type is EXEC (Executable file)
Entry point 0x600
There are 4 program headers, starting at offset 64
Program Headers:
Type Offset
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