[Kernel-packages] [Bug 1590069] Re: vDSO syscalls don't work on yakkety/master-next (and unstable/master)
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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https://bugs.launchpad.net/bugs/1590069
Title:
vDSO syscalls don't work on yakkety/master-next (and unstable/master)
Status in linux package in Ubuntu:
Invalid
Status in linux source package in Yakkety:
Invalid
Bug description:
Hi guys,
I'm having a problem where vDSO syscalls don't work on yakkety-next:
dev:~ uname -a
Linux dev 4.6.0-8-generic #9 SMP Mon Jun 6 14:21:30 MDT 2016 x86_64 x86_64
x86_64 GNU/Linux
dev:~ cat tester.c
#include
#include
#include
int main()
{
struct timeval tv;
struct timezone tz;
while (1) {
sleep(1);
if (gettimeofday(&tv, &tz) < 0) {
perror("gettimeofday");
}
}
return 0;
}
dev:~ make tester
make: 'tester' is up to date.
dev:~ strace tester
strace: Can't stat 'tester': No such file or directory
dev:~ 1 strace ./tester
execve("./tester", ["./tester"], [/* 35 vars */]) = 0
brk(NULL) = 0x19e4000
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or
directory)
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7fbca234b000
access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or
directory)
open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=44113, ...}) = 0
mmap(NULL, 44113, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7fbca234
close(3)= 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or
directory)
open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\t\2\0\0\0\0\0"...,
832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=1864888, ...}) = 0
mmap(NULL, 3967488, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0x7fbca1d5f000
mprotect(0x7fbca1f1f000, 2093056, PROT_NONE) = 0
mmap(0x7fbca211e000, 24576, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1bf000) = 0x7fbca211e000
mmap(0x7fbca2124000, 14848, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7fbca2124000
close(3)= 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7fbca233f000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7fbca233e000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7fbca233d000
arch_prctl(ARCH_SET_FS, 0x7fbca233e700) = 0
mprotect(0x7fbca211e000, 16384, PROT_READ) = 0
mprotect(0x60, 4096, PROT_READ) = 0
mprotect(0x7fbca234d000, 4096, PROT_READ) = 0
munmap(0x7fbca234, 44113) = 0
nanosleep({1, 0}, 0x7fffc8ec71f0) = 0
gettimeofday({1465317034, 813437}, {tz_minuteswest=0, tz_dsttime=0}) = 0
nanosleep({1, 0}, 0x7fffc8ec71f0) = 0
gettimeofday({1465317035, 813718}, {tz_minuteswest=0, tz_dsttime=0}) = 0
nanosleep({1, 0}, 0x7fffc8ec71f0) = 0
gettimeofday({1465317036, 814008}, {tz_minuteswest=0, tz_dsttime=0}) = 0
nanosleep({1, 0}, ^Cstrace: Process 15793 detached
whereas on a normal machine, they do:
~ uname -a
Linux hopstrocity 4.4.0-22-generic #40-Ubuntu SMP Thu May 12 22:03:46 UTC
2016 x86_64 x86_64 x86_64 GNU/Linux
~ cat tester.c
#include
#include
#include
int main()
{
struct timeval tv;
struct timezone tz;
while (1) {
sleep(1);
if (gettimeofday(&tv, &tz) < 0) {
perror("gettimeofday");
}
}
return 0;
}
~ make tester
make: 'tester' is up to date.
~ strace ./tester
execve("./tester", ["./tester"], [/* 60 vars */]) = 0
brk(NULL) = 0x12c7000
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or
directory)
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7fb544a9b000
access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or
directory)
open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=143083, ...}) = 0
mmap(NULL, 143083, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7fb544a78000
close(3)= 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or
directory)
open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\t\2\0\0\0\0\0"...,
832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=1864888, ...
[Kernel-packages] [Bug 1590069] Re: vDSO syscalls don't work on yakkety/master-next (and unstable/master)
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) = 0x55dbbabdf000
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7f444ba48000
access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory)
open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=23765, ...}) = 0
mmap(NULL, 23765, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f444ba42000
close(3)= 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\t\2\0\0\0\0\0"...,
832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=1864888, ...}) = 0
mmap(NULL, 3967488, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0x7f444b45c000
mprotect(0x7f444b61c000, 2093056, PROT_NONE) = 0
mmap(0x7f444b81b000, 24576, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1bf000) = 0x7f444b81b000
mmap(0x7f444b821000, 14848, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f444b821000
close(3)= 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7f444ba41000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7f444ba4
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7f444ba3f000
arch_prctl(ARCH_SET_FS, 0x7f444ba40700) = 0
mprotect(0x7f444b81b000, 16384, PROT_READ) = 0
mprotect(0x55dbb9616000, 4096, PROT_READ) = 0
mprotect(0x7f444ba4a000, 4096, PROT_READ) = 0
munmap(0x7f444ba42000, 23765) = 0
nanosleep({1, 0}, 0x7ffd91f7c6c0) = 0
gettimeofday({1465946468, 561043}, {tz_minuteswest=0, tz_dsttime=0}) = 0
fstat(1, {st_mode=S_IFCHR|0600, st_rdev=makedev(4, 64), ...}) = 0
ioctl(1, TCGETS, {B9600 opost isig icanon echo ...}) = 0
brk(NULL) = 0x55dbbabdf000
brk(0x55dbbac01000) = 0x55dbbac01000
write(1, "sec 1465946468\n", 15sec 1465946468
)= 15
nanosleep({1, 0}, 0x7ffd91f7c6c0) = 0
gettimeofday({1465946469, 567377}, {tz_minuteswest=0, tz_dsttime=0}) = 0
write(1, "sec 1465946469\n", 15sec 1465946469
)= 15
nanosleep({1, 0}, 0x7ffd91f7c6c0) = 0
gettimeofday({1465946470, 570615}, {tz_minuteswest=0, tz_dsttime=0}) = 0
write(1, "sec 1465946470\n", 15sec 1465946470
)= 15
nanosleep({1, 0}, 0x7ffd91f7c6c0) = 0
gettimeofday({1465946471, 574084}, {tz_minuteswest=0, tz_dsttime=0}) = 0
write(1, "sec 1465946471\n", 15sec 1465946471
)= 15
nanosleep({1, 0}, 0x7ffd91f7c6c0) = 0
gettimeofday({1465946472, 576646}, {tz_minuteswest=0, tz_dsttime=0}) = 0
write(1, "sec 1465946472\n", 15sec 1465946472
)= 15
nanosleep({1, 0}, ^Cstrace: Process 1490 detached
ubuntu@yakkety:~$ uname -a
Linux yakkety 4.6.0-7-generic #8-Ubuntu SMP Fri Jun 3 15:08:18 UTC 2016 x86_64
x86_64 x86_64 GNU/Linux
ubuntu@yakkety:~$ apt-cache showpkg linux-image-4.6.0-7-generic
Package: linux-image-4.6.0-7-generic
Versions:
4.6.0-7.8
(/var/lib/apt/lists/ppa.launchpad.net_canonical-kernel-team_ppa_ubuntu_dists_yakkety_main_binary-amd64_Packages)
(/var/lib/dpkg/status)
Description Language:
File:
/var/lib/apt/lists/ppa.launchpad.net_canonical-kernel-team_ppa_ubuntu_dists_yakkety_main_binary-amd64_Packages
MD5: eb70ad30d136e11219815e66f14ab797
Description Language: en
File:
/var/lib/apt/lists/ppa.launchpad.net_canonical-kernel-team_ppa_ubuntu_dists_yakkety_main_i18n_Translation-en
MD5: eb70ad30d136e11219815e66f14ab797
Reverse Depends:
linux-image-generic,linux-image-4.6.0-7-generic
linux-image-extra-4.6.0-7-generic,linux-image-4.6.0-7-generic
linux-image-virtual,linux-image-4.6.0-7-generic
Dependencies:
4.6.0-7.8 - initramfs-tools (16 (null)) linux-initramfs-tool (0 (null)) kmod (0
(null)) grub-pc (16 (null)) grub-efi-amd64 (16 (null)) grub-efi-ia32 (16
(null)) grub (16 (null)) lilo (0 (null)) fdutils (0 (null)) linux-doc-4.6.0 (16
(null)) linux-source-4.6.0 (0 (null)) linux-tools (0 (null))
linux-headers-4.6.0-7-generic (0 (null))
Provides:
4.6.0-7.8 - zfs-dkms (= ) virtualbox-guest-modules (= ) spl-dkms (= )
redhat-cluster-modules (= ) linux-image (= ) kvm-api-4 (= ) ivtv-modules (= )
fuse-module (= )
Reverse Provides:
ubuntu@yakkety:~$
Here the kernel has a 4.6.0-7 version number, not a 4.6.0-7.8 as you
mentioned. Where do I get that kernel?
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https://bugs.launchpad.net/bugs/1590069
[Kernel-packages] [Bug 1590069] Re: vDSO syscalls don't work on yakkety/master-next (and unstable/master)
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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https://bugs.launchpad.net/bugs/1590069
Title:
vDSO syscalls don't work on yakkety/master-next (and unstable/master)
Status in linux package in Ubuntu:
Triaged
Status in linux source package in Yakkety:
Triaged
Bug description:
Hi guys,
I'm having a problem where vDSO syscalls don't work on yakkety-next:
dev:~ uname -a
Linux dev 4.6.0-8-generic #9 SMP Mon Jun 6 14:21:30 MDT 2016 x86_64 x86_64
x86_64 GNU/Linux
dev:~ cat tester.c
#include
#include
#include
int main()
{
struct timeval tv;
struct timezone tz;
while (1) {
sleep(1);
if (gettimeofday(&tv, &tz) < 0) {
perror("gettimeofday");
}
}
return 0;
}
dev:~ make tester
make: 'tester' is up to date.
dev:~ strace tester
strace: Can't stat 'tester': No such file or directory
dev:~ 1 strace ./tester
execve("./tester", ["./tester"], [/* 35 vars */]) = 0
brk(NULL) = 0x19e4000
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or
directory)
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7fbca234b000
access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or
directory)
open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=44113, ...}) = 0
mmap(NULL, 44113, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7fbca234
close(3)= 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or
directory)
open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\t\2\0\0\0\0\0"...,
832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=1864888, ...}) = 0
mmap(NULL, 3967488, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0x7fbca1d5f000
mprotect(0x7fbca1f1f000, 2093056, PROT_NONE) = 0
mmap(0x7fbca211e000, 24576, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1bf000) = 0x7fbca211e000
mmap(0x7fbca2124000, 14848, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7fbca2124000
close(3)= 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7fbca233f000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7fbca233e000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7fbca233d000
arch_prctl(ARCH_SET_FS, 0x7fbca233e700) = 0
mprotect(0x7fbca211e000, 16384, PROT_READ) = 0
mprotect(0x60, 4096, PROT_READ) = 0
mprotect(0x7fbca234d000, 4096, PROT_READ) = 0
munmap(0x7fbca234, 44113) = 0
nanosleep({1, 0}, 0x7fffc8ec71f0) = 0
gettimeofday({1465317034, 813437}, {tz_minuteswest=0, tz_dsttime=0}) = 0
nanosleep({1, 0}, 0x7fffc8ec71f0) = 0
gettimeofday({1465317035, 813718}, {tz_minuteswest=0, tz_dsttime=0}) = 0
nanosleep({1, 0}, 0x7fffc8ec71f0) = 0
gettimeofday({1465317036, 814008}, {tz_minuteswest=0, tz_dsttime=0}) = 0
nanosleep({1, 0}, ^Cstrace: Process 15793 detached
whereas on a normal machine, they do:
~ uname -a
Linux hopstrocity 4.4.0-22-generic #40-Ubuntu SMP Thu May 12 22:03:46 UTC
2016 x86_64 x86_64 x86_64 GNU/Linux
~ cat tester.c
#include
#include
#include
int main()
{
struct timeval tv;
struct timezone tz;
while (1) {
sleep(1);
if (gettimeofday(&tv, &tz) < 0) {
perror("gettimeofday");
}
}
return 0;
}
~ make tester
make: 'tester' is up to date.
~ strace ./tester
execve("./tester", ["./tester"], [/* 60 vars */]) = 0
brk(NULL) = 0x12c7000
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or
directory)
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7fb544a9b000
access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or
directory)
open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=143083, ...}) = 0
mmap(NULL, 143083, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7fb544a78000
close(3)= 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or
directory)
open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\t\2\0\0\0\0\0"...,
832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=1864888, ...})
Re: [Kernel-packages] [Bug 1590069] Re: vDSO syscalls don't work on yakkety/master-next (and unstable/master)
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
using the -next branch and not what's currently in master. Could that
be the difference?
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https://bugs.launchpad.net/bugs/1590069
Title:
vDSO syscalls don't work on yakkety/master-next (and unstable/master)
Status in linux package in Ubuntu:
Triaged
Status in linux source package in Yakkety:
Triaged
Bug description:
Hi guys,
I'm having a problem where vDSO syscalls don't work on yakkety-next:
dev:~ uname -a
Linux dev 4.6.0-8-generic #9 SMP Mon Jun 6 14:21:30 MDT 2016 x86_64 x86_64
x86_64 GNU/Linux
dev:~ cat tester.c
#include
#include
#include
int main()
{
struct timeval tv;
struct timezone tz;
while (1) {
sleep(1);
if (gettimeofday(&tv, &tz) < 0) {
perror("gettimeofday");
}
}
return 0;
}
dev:~ make tester
make: 'tester' is up to date.
dev:~ strace tester
strace: Can't stat 'tester': No such file or directory
dev:~ 1 strace ./tester
execve("./tester", ["./tester"], [/* 35 vars */]) = 0
brk(NULL) = 0x19e4000
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or
directory)
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7fbca234b000
access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or
directory)
open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=44113, ...}) = 0
mmap(NULL, 44113, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7fbca234
close(3)= 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or
directory)
open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\t\2\0\0\0\0\0"...,
832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=1864888, ...}) = 0
mmap(NULL, 3967488, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0x7fbca1d5f000
mprotect(0x7fbca1f1f000, 2093056, PROT_NONE) = 0
mmap(0x7fbca211e000, 24576, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1bf000) = 0x7fbca211e000
mmap(0x7fbca2124000, 14848, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7fbca2124000
close(3)= 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7fbca233f000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7fbca233e000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7fbca233d000
arch_prctl(ARCH_SET_FS, 0x7fbca233e700) = 0
mprotect(0x7fbca211e000, 16384, PROT_READ) = 0
mprotect(0x60, 4096, PROT_READ) = 0
mprotect(0x7fbca234d000, 4096, PROT_READ) = 0
munmap(0x7fbca234, 44113) = 0
nanosleep({1, 0}, 0x7fffc8ec71f0) = 0
gettimeofday({1465317034, 813437}, {tz_minuteswest=0, tz_dsttime=0}) = 0
nanosleep({1, 0}, 0x7fffc8ec71f0) = 0
gettimeofday({1465317035, 813718}, {tz_minuteswest=0, tz_dsttime=0}) = 0
nanosleep({1, 0}, 0x7fffc8ec71f0) = 0
gettimeofday({1465317036, 814008}, {tz_minuteswest=0, tz_dsttime=0}) = 0
nanosleep({1, 0}, ^Cstrace: Process 15793 detached
whereas on a normal machine, they do:
~ uname -a
Linux hopstrocity 4.4.0-22-generic #40-Ubuntu SMP Thu May 12 22:03:46 UTC
2016 x86_64 x86_64 x86_64 GNU/Linux
~ cat tester.c
#include
#include
#include
int main()
{
struct timeval tv;
struct timezone tz;
while (1) {
sleep(1);
if (gettimeofday(&tv, &tz) < 0) {
perror("gettimeofday");
}
}
return 0;
}
~ make tester
make: 'tester' is up to date.
~ strace ./tester
execve("./tester", ["./tester"], [/* 60 vars */]) = 0
brk(NULL) = 0x12c7000
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or
directory)
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7fb544a9b000
access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or
directory)
open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=143083, ...}) = 0
mmap(NULL, 143083, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7fb544a78000
close(3)= 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or
directory)
open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177EL
[Kernel-packages] [Bug 1590069] Re: vDSO syscalls don't work on yakkety/master-next (and unstable/master)
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)
Status: Incomplete => Triaged
** Changed in: linux (Ubuntu Yakkety)
Assignee: (unassigned) => Tim Gardner (timg-tpi)
--
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1590069
Title:
vDSO syscalls don't work on yakkety/master-next (and unstable/master)
Status in linux package in Ubuntu:
Triaged
Status in linux source package in Yakkety:
Triaged
Bug description:
Hi guys,
I'm having a problem where vDSO syscalls don't work on yakkety-next:
dev:~ uname -a
Linux dev 4.6.0-8-generic #9 SMP Mon Jun 6 14:21:30 MDT 2016 x86_64 x86_64
x86_64 GNU/Linux
dev:~ cat tester.c
#include
#include
#include
int main()
{
struct timeval tv;
struct timezone tz;
while (1) {
sleep(1);
if (gettimeofday(&tv, &tz) < 0) {
perror("gettimeofday");
}
}
return 0;
}
dev:~ make tester
make: 'tester' is up to date.
dev:~ strace tester
strace: Can't stat 'tester': No such file or directory
dev:~ 1 strace ./tester
execve("./tester", ["./tester"], [/* 35 vars */]) = 0
brk(NULL) = 0x19e4000
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or
directory)
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7fbca234b000
access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or
directory)
open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=44113, ...}) = 0
mmap(NULL, 44113, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7fbca234
close(3)= 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or
directory)
open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\t\2\0\0\0\0\0"...,
832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=1864888, ...}) = 0
mmap(NULL, 3967488, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0x7fbca1d5f000
mprotect(0x7fbca1f1f000, 2093056, PROT_NONE) = 0
mmap(0x7fbca211e000, 24576, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1bf000) = 0x7fbca211e000
mmap(0x7fbca2124000, 14848, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7fbca2124000
close(3)= 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7fbca233f000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7fbca233e000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7fbca233d000
arch_prctl(ARCH_SET_FS, 0x7fbca233e700) = 0
mprotect(0x7fbca211e000, 16384, PROT_READ) = 0
mprotect(0x60, 4096, PROT_READ) = 0
mprotect(0x7fbca234d000, 4096, PROT_READ) = 0
munmap(0x7fbca234, 44113) = 0
nanosleep({1, 0}, 0x7fffc8ec71f0) = 0
gettimeofday({1465317034, 813437}, {tz_minuteswest=0, tz_dsttime=0}) = 0
nanosleep({1, 0}, 0x7fffc8ec71f0) = 0
gettimeofday({1465317035, 813718}, {tz_minuteswest=0, tz_dsttime=0}) = 0
nanosleep({1, 0}, 0x7fffc8ec71f0) = 0
gettimeofday({1465317036, 814008}, {tz_minuteswest=0, tz_dsttime=0}) = 0
nanosleep({1, 0}, ^Cstrace: Process 15793 detached
whereas on a normal machine, they do:
~ uname -a
Linux hopstrocity 4.4.0-22-generic #40-Ubuntu SMP Thu May 12 22:03:46 UTC
2016 x86_64 x86_64 x86_64 GNU/Linux
~ cat tester.c
#include
#include
#include
int main()
{
struct timeval tv;
struct timezone tz;
while (1) {
sleep(1);
if (gettimeofday(&tv, &tz) < 0) {
perror("gettimeofday");
}
}
return 0;
}
~ make tester
make: 'tester' is up to date.
~ strace ./tester
execve("./tester", ["./tester"], [/* 60 vars */]) = 0
brk(NULL) = 0x12c7000
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or
directory)
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7fb544a9b000
access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or
directory)
open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=143083, ...}) = 0
mmap(NULL, 143083, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7fb544a78000
close(3)= 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or
directory)
open("/lib/x86_64-linux-gnu/libc.so.6", O_RDON
[Kernel-packages] [Bug 1590069] Re: vDSO syscalls don't work on yakkety/master-next (and unstable/master)
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 VirtAddr PhysAddr
FileSizMemSiz Flags Align
LOAD 0x 0x 0x
0x0b39 0x0b39 R E1000
DYNAMIC0x 0x 0x
0x 0x R 8
readelf: Error: no .dynamic section in the dynamic segment
NOTE 0x0460 0x0460 0x0460
0x003c 0x003c R 4
GNU_EH_FRAME 0x049c 0x049c 0x049c
0x003c 0x003c R 4
Section to Segment mapping:
Segment Sections...
00 .rodata .note .eh_frame_hdr .eh_frame .text .altinstructions
.altinstr_replacement
01
02 .note
03 .eh_frame_hdr
--
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1590069
Title:
vDSO syscalls don't work on yakkety/master-next (and unstable/master)
Status in linux package in Ubuntu:
New
Bug description:
Hi guys,
I'm having a problem where vDSO syscalls don't work on yakkety-next:
dev:~ uname -a
Linux dev 4.6.0-8-generic #9 SMP Mon Jun 6 14:21:30 MDT 2016 x86_64 x86_64
x86_64 GNU/Linux
dev:~ cat tester.c
#include
#include
#include
int main()
{
struct timeval tv;
struct timezone tz;
while (1) {
sleep(1);
if (gettimeofday(&tv, &tz) < 0) {
perror("gettimeofday");
}
}
return 0;
}
dev:~ make tester
make: 'tester' is up to date.
dev:~ strace tester
strace: Can't stat 'tester': No such file or directory
dev:~ 1 strace ./tester
execve("./tester", ["./tester"], [/* 35 vars */]) = 0
brk(NULL) = 0x19e4000
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or
directory)
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7fbca234b000
access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or
directory)
open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=44113, ...}) = 0
mmap(NULL, 44113, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7fbca234
close(3)= 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or
directory)
open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\t\2\0\0\0\0\0"...,
832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=1864888, ...}) = 0
mmap(NULL, 3967488, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0x7fbca1d5f000
mprotect(0x7fbca1f1f000, 2093056, PROT_NONE) = 0
mmap(0x7fbca211e000, 24576, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1bf000) = 0x7fbca211e000
mmap(0x7fbca2124000, 14848, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7fbca2124000
close(3)= 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7fbca233f000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7fbca233e000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7fbca233d000
arch_prctl(ARCH_SET_FS, 0x7fbca233e700) = 0
mprotect(0x7fbca211e000, 16384, PROT_READ) = 0
mprotect(0x60, 4096, PROT_READ) = 0
mprotect(0x7fbca234d000, 4096, PROT_READ) = 0
munmap(0x7fbca234, 44113) = 0
nanosleep({1, 0}, 0x7fffc8ec71f0) = 0
gettimeofday({1465317034, 813437}, {tz_minuteswest=0, tz_dsttime=0}) = 0
nanosleep({1, 0}, 0x7fffc8ec71f0) = 0
gettimeofday({1465317035, 813718}, {tz_minuteswest=0, tz_dsttime=0}) = 0
nanosleep({1, 0}, 0x7fffc8ec71f0) = 0
gettimeofday({1465317036, 814008}, {tz_minuteswest=0, tz_dsttime=0}) = 0
nanosleep({1, 0}, ^Cstrace: Process 15793 detached
whereas on a normal machine, they do:
~ uname -a
Linux hopstrocity 4.4.0-22-generic #40-Ubuntu SMP Thu May 12 22:03:46 UTC
2016 x86_64 x86_64 x86_64 GNU/Linux
~ cat tester.c
#include
#include
#include
int main()
{
struct timeval tv;
struct timezone tz;
while (1) {
sleep(1);
if (gettimeofday(&tv, &tz) < 0) {
perror("gettimeofday");
}
}
return 0;
}
~ make tester
make: 'tester' is up to date.
~ strace ./te
