On Sat, Jan 11, 2014 at 11:47 AM, Toralf Förster toralf.foers...@gmx.de wrote:
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA256
I do fuzz testing with trinity (latest git version) a stable 32 bit Gentoo
Linux user mode linux image.
The host is a stable 32 bit vanilla 3.12.7 kernel, the guest
...to get smp_store_release().
Reported-by: Randy Dunlap rdun...@infradead.org
Signed-off-by: Richard Weinberger rich...@nod.at
---
arch/um/include/asm/Kbuild | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/um/include/asm/Kbuild b/arch/um/include/asm/Kbuild
index fdde187..fb3a6cc 100644
On Sun, Nov 17, 2013 at 1:57 PM, Richard Weinberger rich...@nod.at wrote:
Am 11.11.2013 19:03, schrieb Tristan Schmelcher:
From: Tristan Schmelcher tschmelc...@google.com
Inferring the mount hierarchy correctly from /proc/mounts is hard when
MS_MOVE
may have been used, and the previous code
.
-
James Hogan (1):
um: hostfs: make functions static
Richard Weinberger (2):
um: Removed unused attributes from thread_struct
um: Include generic barrier.h
arch/um/include/asm/Kbuild | 1 +
arch/um/include/asm/processor-generic.h | 3 --
fs
Am 27.02.2014 20:05, schrieb Boaz Harrosh:
Hi Richard, uml hackers
Since some time my echo t /proc/sysrq-trigger stopped producing the
proper global back-traces for all Kernel threads.
All I get is:
I have an idea, do you see this regression starting with v3.12?
Thanks,
//richard
Am 28.02.2014 09:27, schrieb Anton Ivanov (antivano):
Hi Richard, Hi Jeff, hi list,
On behalf of Cisco systems, I am authorized to make a offer a set bug
fixes as well as contribute several additional features and performance
improvements to UML. All of these have been used internally for a
On Sat, Mar 1, 2014 at 10:28 AM, Toralf Förster toralf.foers...@gmx.de wrote:
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA256
Today I tested if I can activate that syscall again here (munmap works fine
since few days).
Testing a 32 bit user mode linux image with $trinity -q -N 10 -C 8
Am 07.03.2014 19:37, schrieb anton.iva...@kot-begemot.co.uk:
From: Anton Ivanov antiv...@cisco.com
PIPE is the wrong IPC for this type of inter-thread communication.
For more details see:
http://stackoverflow.com/questions/4624071/pipe-buffer-size-is-4k-or-64k
The observations on
Linus,
The following changes since commit a798c10faf62a505d24e5f6213fbaf904a39623f:
Linux 3.15-rc2 (2014-04-20 11:08:50 -0700)
are available in the git repository at:
git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml.git for-linus
for you to fetch changes up to
Am 07.03.2014 19:37, schrieb anton.iva...@kot-begemot.co.uk:
From: Anton Ivanov antiv...@cisco.com
PIPE is the wrong IPC for this type of inter-thread communication.
For more details see:
http://stackoverflow.com/questions/4624071/pipe-buffer-size-is-4k-or-64k
The observations on that
On Wed, Apr 30, 2014 at 8:19 PM, Toralf Förster toralf.foers...@gmx.de wrote:
-or- it uncovers a bug in kernel v3.15-rc3 for UML:
UML most not panic. :)
Do you have the trinity logs?
I'd like to know the syscalls parameters.
It looks like trinity managed it to crash a thread on the host side.
Am 01.05.2014 12:29, schrieb Toralf Förster:
On 05/01/2014 11:22 AM, Richard Weinberger wrote:
On Wed, Apr 30, 2014 at 8:19 PM, Toralf Förster toralf.foers...@gmx.de
wrote:
-or- it uncovers a bug in kernel v3.15-rc3 for UML:
UML most not panic. :)
Do you have the trinity logs?
I'd like
Toralf,
Am 01.05.2014 17:15, schrieb Toralf Förster:
On 05/01/2014 02:33 PM, Richard Weinberger wrote:
Am 01.05.2014 12:29, schrieb Toralf Förster:
On 05/01/2014 11:22 AM, Richard Weinberger wrote:
On Wed, Apr 30, 2014 at 8:19 PM, Toralf Förster toralf.foers...@gmx.de
wrote
Am 01.05.2014 23:34, schrieb Toralf Förster:
On 05/01/2014 10:57 PM, Richard Weinberger wrote:
Toralf,
Yeah, this is because trinity destroys the UML stub code.
Please test the attached patch, it should fix the root cause of the problem.
Thanks,
//richard
If I do just apply fix2.patch
Am 01.05.2014 23:34, schrieb Toralf Förster:
On 05/01/2014 10:57 PM, Richard Weinberger wrote:
Toralf,
Yeah, this is because trinity destroys the UML stub code.
Please test the attached patch, it should fix the root cause of the problem.
Thanks,
//richard
If I do just apply fix2.patch
On Fri, May 2, 2014 at 8:43 AM, st...@nixia.no wrote:
Yeah, this is because trinity destroys the UML stub code.
Please test the attached patch, it should fix the root cause of the
problem.
@@ -124,6 +125,9 @@ static int add_munmap(unsigned long addr, unsigned
long len,
struct
Am 02.05.2014 16:07, schrieb Toralf Förster:
On 05/02/2014 09:46 AM, Richard Weinberger wrote:
Am 01.05.2014 23:34, schrieb Toralf Förster:
On 05/01/2014 10:57 PM, Richard Weinberger wrote:
Toralf,
Yeah, this is because trinity destroys the UML stub code.
Please test the attached patch
This fixes a long standing problem that UML crashes
or locks up if a task messes with it' stub vma.
Reported-by: toralf.foers...@gmx.de
Signed-off-by: Richard Weinberger rich...@nod.at
---
arch/um/kernel/tlb.c | 18 +++---
1 file changed, 15 insertions(+), 3 deletions(-)
diff --git
This reverts commit 0974a9cadc7886f7baaa458bb0c89f5c5f9d458e.
It was a bad idea and was only papering over the real issue.
Signed-off-by: Richard Weinberger rich...@nod.at
---
arch/um/os-Linux/skas/process.c | 9 ++---
1 file changed, 2 insertions(+), 7 deletions(-)
diff --git a/arch/um/os
On Sat, May 3, 2014 at 6:04 PM, Toralf Förster toralf.foers...@gmx.de wrote:
I could force a crash using latest kernel tree (v3.15-rc3-159-g6c6ca9c with
applied fix3.patch for the mremap syscall) and latest trinity tree
(1.1-1349-g18ebf71).
The backtrace of the core dump gives :
Am 10.05.2014 01:43, schrieb Joe Perches:
Joe Perches (4):
UserModeLinux: Convert UM_KERN_LEVEL to KERN_LEVEL
UserModeLinux: Remove unused #defines of UM_KERN_LEVEL
UserModeLinux: Use a more current logging style
UserModeLinux: Convert printks to pr_level
Am 14.05.2014 22:07, schrieb Joe Perches:
On Wed, 2014-05-14 at 21:52 +0200, Richard Weinberger wrote:
Am 10.05.2014 01:43, schrieb Joe Perches:
Joe Perches (4):
UserModeLinux: Convert UM_KERN_LEVEL to KERN_LEVEL
UserModeLinux: Remove unused #defines of UM_KERN_LEVEL
UserModeLinux: Use
There is no need to go through handle_page_fault().
If we try to access the zero page in kernel mode just panic().
Signed-off-by: Richard Weinberger rich...@nod.at
---
arch/um/kernel/trap.c | 9 +++--
1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/arch/um/kernel/trap.c b/arch
handler is not designed to fix such faults the
SIGSEGV stays and UML consumes all CPU handling SIGSEGV.
The only sane thing we can do here is calling panic().
This patch helps to detect bad memory access from the kernel side.
Signed-off-by: Richard Weinberger rich...@nod.at
---
arch/um/kernel/trap.c
On Fri, May 30, 2014 at 10:24 AM, enjoy mindful enjoymind...@gmail.com wrote:
Hi,
When I'm trace uml kernel with gdb, I found there are two mem_map
(struct page) arrays.
1) the first one created in init_maps function, and pointed by *local*
pointer struct page *map in init_maps function
On Fri, May 30, 2014 at 11:17 AM, Richard Weinberger
richard.weinber...@gmail.com wrote:
On Fri, May 30, 2014 at 10:24 AM, enjoy mindful enjoymind...@gmail.com
wrote:
Hi,
When I'm trace uml kernel with gdb, I found there are two mem_map
(struct page) arrays.
1) the first one created
Am 01.06.2014 15:08, schrieb Real Name:
From: Honggang Li enjoymind...@gmail.com
1) uml kernel bootmem managed through bootmem_data-node_bootmem_map,
not the struct page array, so the array is unnecessary.
2) the bootmem struct page array has been pointed by a *local* pointer,
struct page
Am 05.06.2014 06:15, schrieb Honggang Li:
arch/x86/um/checksum_32.S had been copy paste from x86. When build
x86 uml, csum_partial_copy_generic_i386 mess up the exception table.
In fact, exception table dose not work in uml kernel.
Are you sure that exception tables do not work on UML?
I
Hi!
Am 03.06.2014 07:30, schrieb Real Name:
From: Honggang Li enjoymind...@gmail.com
The patch based on linux-next-2014-06-02.
The old init_maps function does two things:
1) allocates and initializes one struct page array for bootmem
2) count the number of total pages
After removed
Am 16.06.2014 05:28, schrieb Real Name:
On Sat, Jun 14, 2014 at 11:44:04AM +0200, Richard Weinberger wrote:
Hi!
Am 03.06.2014 07:30, schrieb Real Name:
From: Honggang Li enjoymind...@gmail.com
The patch based on linux-next-2014-06-02.
The old init_maps function does two things:
1
Am 08.07.2014 10:16, schrieb Konstantin Khlebnikov:
On Tue, Jul 8, 2014 at 12:01 PM, Richard Weinberger
richard.weinber...@gmail.com wrote:
On Tue, Jul 8, 2014 at 7:48 AM, Konstantin Khlebnikov koc...@gmail.com
wrote:
On Tue, Jul 8, 2014 at 2:05 AM, Andrew Morton a...@linux-foundation.org
Am 08.07.2014 10:47, schrieb Konstantin Khlebnikov:
On Tue, Jul 8, 2014 at 12:33 PM, Richard Weinberger rich...@nod.at wrote:
Am 08.07.2014 10:30, schrieb Konstantin Khlebnikov:
On Tue, Jul 8, 2014 at 12:20 PM, Richard Weinberger rich...@nod.at wrote:
Am 08.07.2014 10:16, schrieb Konstantin
Am 08.07.2014 11:03, schrieb Konstantin Khlebnikov:
I know. But debugging/profiling of kernel code is much easier when it
runs in userspace.
I think this is the last use case where uml might beat normal hardware
accelerated qemu/kvm.
But without SMP and with that high overhead on each syscall
Am 08.07.2014 11:09, schrieb Geert Uytterhoeven:
On Tue, Jul 8, 2014 at 11:06 AM, Richard Weinberger rich...@nod.at wrote:
Am 08.07.2014 11:03, schrieb Konstantin Khlebnikov:
I know. But debugging/profiling of kernel code is much easier when it
runs in userspace.
I think this is the last use
Am 08.07.2014 11:22, schrieb Geert Uytterhoeven:
On Tue, Jul 8, 2014 at 11:14 AM, Richard Weinberger rich...@nod.at wrote:
And that you don't need root permissions to run it.
You can use KVM also without being root.
It depends on the rights of /dev/kvm.
Which are controlled by... root
Am 12.07.2014 19:16, schrieb Toralf Förster:
On 05/02/2014 04:14 PM, Richard Weinberger wrote:
Am 02.05.2014 16:07, schrieb Toralf Förster:
On 05/02/2014 09:46 AM, Richard Weinberger wrote:
Am 01.05.2014 23:34, schrieb Toralf Förster:
On 05/01/2014 10:57 PM, Richard Weinberger wrote:
Toralf
Am 18.07.2014 01:13, schrieb Real Name:
On Sat, Jun 28, 2014 at 12:06:28PM +0800, Real Name wrote:
On Sat, Jun 21, 2014 at 03:28:52PM +0800, Real Name wrote:
On Thu, Jun 05, 2014 at 11:49:49PM +0200, Richard Weinberger wrote:
Am 05.06.2014 06:15, schrieb Honggang Li:
arch/x86/um/checksum_32.S
.
Richard Weinberger (4):
Revert um: Fix wait_stub_done() error handling
um: Ensure that a stub page cannot get unmapped
um: Fix hung task in fix_range_common()
um: segv: Save regs only in case of a kernel mode fault
From: Richard Weinberger rich...@nod.at
Use the more generic functions get_signal() signal_setup_done()
for signal delivery.
Signed-off-by: Richard Weinberger rich...@nod.at
---
arch/um/include/shared/frame_kern.h | 12 --
arch/um/kernel/signal.c | 27
Himangi,
Am 19.07.2014 13:34, schrieb Himangi Saraogi:
alloc_bootmem and related functions never return NULL. Thus a NULL
test or memset after calls to these functions is unnecessary.
The following Coccinelle semantic patch was used for making the change:
@@
expression E;
statement S;
Hi Vivek,
Daniel Walter reported that UML is currently broken.
The offending commit is:
commit 8c86e70acead629aacb4afcd818add66bf6844d9
Author: Vivek Goyal vgo...@redhat.com
Date: Fri Aug 8 14:25:50 2014 -0700
resource: provide new functions to walk through resources
It dies in
Hi Vivek,
Am 11.08.2014 14:22, schrieb Vivek Goyal:
On Sun, Aug 10, 2014 at 06:56:14PM +0200, Richard Weinberger wrote:
Hi Vivek,
Daniel Walter reported that UML is currently broken.
The offending commit is:
Hi Richard,
Thanks for pointing it out. I will look into it.
Would you
Am 11.08.2014 20:44, schrieb Vivek Goyal:
On Mon, Aug 11, 2014 at 02:25:56PM +0200, Richard Weinberger wrote:
Hi Vivek,
Am 11.08.2014 14:22, schrieb Vivek Goyal:
On Sun, Aug 10, 2014 at 06:56:14PM +0200, Richard Weinberger wrote:
Hi Vivek,
Daniel Walter reported that UML is currently
Am 12.08.2014 16:46, schrieb Vivek Goyal:
Richard and Daniel reported that UML is broken due to changes to resource
traversal functions. Problem is that iomem_resource.child can be null
and new code does not consider that possibility. Old code used a for loop
and that loop will not even
Am 12.08.2014 17:04, schrieb Vivek Goyal:
On Tue, Aug 12, 2014 at 04:49:35PM +0200, Richard Weinberger wrote:
Am 12.08.2014 16:46, schrieb Vivek Goyal:
Richard and Daniel reported that UML is broken due to changes to resource
traversal functions. Problem is that iomem_resource.child can
On Wed, Aug 13, 2014 at 9:11 PM, Toralf Förster toralf.foers...@gmx.de wrote:
The long story is below.
As of now UML has no CONFIG_STACKTRACE_SUPPORT.
But Daniel (CC'd) is working on it.
Forwarded Message
Subject: Re: trinity seems not to reap all childs
Date: Wed, 13 Aug
On Thu, Sep 4, 2014 at 9:00 PM, anton.iva...@kot-begemot.co.uk wrote:
Patch dependencies:
[PATCH v3 01/10] Epoll based interrupt controller
Full redesign of the existing UML poll based controller. The old
poll controller incurs huge penalties for IRQ sharing and many devices
setup due to
On Sun, Sep 14, 2014 at 12:42 PM, Thomas Meyer tho...@m3y3r.de wrote:
Call machined's CreateMachine to create a scope unit for the
current uml instance.
Can you please describe in detail why we need this feature?
In general I'm fine with adding such functionality but please make it optional.
Rob,
Am 23.09.2014 16:58, schrieb Rob Landley:
As long as somebody's paying attention to UML again: what would be
involved in adding support for arm/mips/sh4/sparc...
I've mostly wandered off to use qemu these days, and I package system
images with native compilers you can boot up and
Am 26.09.2014 13:49, schrieb anton.iva...@kot-begemot.co.uk:
From: Anton Ivanov antiv...@cisco.com
This is a fix for a very old UML bug which can be triggered with stock
UML. It takes a lot of effort to trigger it there because the
lseek()/read() | write() mechanics of the UBD driver
On Mon, Sep 29, 2014 at 7:36 PM, Thomas Meyer tho...@m3y3r.de wrote:
Hi,
I tried to install the latest Fedora 21 from the Network Install Image
DVD (
https://fedoraproject.org/get-prerelease#server
On Mon, Sep 29, 2014 at 8:29 PM, Thomas Meyer tho...@m3y3r.de wrote:
Hi,
I get a timeout in the Fedora 21 alpha:
[ TIME ] Timed out waiting for device
dev-disk-by\x2duuid-008af19d\x2d2562\x2d49bd\x2d8907\x2d721ea08f3e14.device.
But all devices are available from early kernel start:
# ls
On Fri, Oct 3, 2014 at 1:21 AM, Thomas Meyer tho...@m3y3r.de wrote:
Hi,
When you pass an initrd to UML and the size of the initrd is too big for
the current kernel memory, a panic() call is done with the message(Out
of memory).
But this message never hits the stdout as the following stack
Am 07.10.2014 07:28, schrieb Guenter Roeck:
arch/um/kernel/reboot.c| 2 --
Acked-by: Richard Weinberger rich...@nod.at
Thanks,
//richard
--
Meet PCI DSS 3.0 Compliance Requirements with EventLog Analyzer
Am 11.10.2014 um 13:29 schrieb Nicolas Iooss:
syscall_stub_start is declared with different types in C files:
arch/um/kernel/physmem.c: extern int __syscall_stub_start;
arch/um/kernel/skas/mmu.c: extern int __syscall_stub_start;
arch/um/os-Linux/skas/mem.c: extern unsigned long
Am 11.10.2014 um 14:15 schrieb Nicolas Iooss:
2014-10-11 13:42 GMT+02:00 Richard Weinberger:
Am 11.10.2014 um 13:29 schrieb Nicolas Iooss:
syscall_stub_start is declared with different types in C files:
arch/um/kernel/physmem.c: extern int __syscall_stub_start;
arch/um/kernel/skas/mmu.c
Linus,
The following changes since commit c798360cd1438090d51eeaa8e67985da11362eba:
Merge branch 'for-3.18' of
git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu (2014-10-10 07:26:02
-0400)
are available in the git repository at:
Am 18.10.2014 um 16:23 schrieb Manfred Schlaegl:
The pointer to bp stack-frame is no longer used. Removed it.
Good catch!
This also removes a corresponding compiler-warning.
Which warning exactly?
Thanks,
//richard
Am 18.10.2014 um 17:12 schrieb Manfred Schlaegl:
On 2014-10-18 16:42, Richard Weinberger wrote:
Am 18.10.2014 um 16:23 schrieb Manfred Schlaegl:
The pointer to bp stack-frame is no longer used. Removed it.
Good catch!
Thank you.
This also removes a corresponding compiler-warning.
Which
Am 18.10.2014 um 17:24 schrieb Manfred Schlaegl:
On 2014-10-18 17:19, Richard Weinberger wrote:
Am 18.10.2014 um 17:12 schrieb Manfred Schlaegl:
On 2014-10-18 16:42, Richard Weinberger wrote:
Am 18.10.2014 um 16:23 schrieb Manfred Schlaegl:
The pointer to bp stack-frame is no longer used
On Mon, Oct 20, 2014 at 1:18 PM, Thomas Meyer tho...@m3y3r.de wrote:
Am 20.10.2014 11:28 schrieb Daniel Walter sa...@0x90.at:
- Original Message -
From: Thomas Meyer tho...@m3y3r.de
To: user-mode-linux-devel user-mode-linux-devel@lists.sourceforge.net
Sent: Sunday, October 19,
Anton,
Am 23.10.2014 um 09:34 schrieb Anton Ivanov:
Hi Richard,
I have had a question in my mind on this for quite a while around this bug
(and a quite a few others).
Fell free to ask, I'll try hand to find time to answer.
UML by the nature of being UP includes the generic spinlock
Geert,
On Wed, Nov 12, 2014 at 10:48 AM, Geert Uytterhoeven
ge...@linux-m68k.org wrote:
On Wed, Nov 12, 2014 at 10:46 AM, Geert Uytterhoeven
ge...@linux-m68k.org wrote:
JFYI, when comparing v3.18-rc4[1] to v3.18-rc3[3], the summaries are:
- build errors: +5/-6
+
Am 12.11.2014 um 11:22 schrieb Geert Uytterhoeven:
On Wed, Nov 12, 2014 at 11:19 AM, Richard Weinberger
richard.weinber...@gmail.com wrote:
+ /home/kisskb/slave/src/fs/hostfs/hostfs_user.c: error: 'AT_FDCWD'
undeclared (first use in this function): = 378
+ /home/kisskb/slave/src/fs
On Wed, Nov 19, 2014 at 6:06 PM, Toralf Förster toralf.foers...@gmx.de wrote:
console [mc-1] enabled
Failed to initialize ubd device 0 :Couldn't determine size of device's file
This is ubd_file_size(). Can you find out where exactly it is failing?
Just add a few printk()s into it.
--
Thanks,
On Thu, Nov 20, 2014 at 8:01 PM, Toralf Förster toralf.foers...@gmx.de wrote:
A recent question at trinity's mailing list
(http://news.gmane.org/gmane.comp.security.fuzzing.trinity) points probably
to a hostfs issue - therefore I'd like to forward the answer f Dave Jones
here.
ANd /me
Hi!
Am 10.12.2014 um 11:46 schrieb Miklos Szeredi:
The guilty commit is:
00f634bc522d asm-generic: add generic futex for !CONFIG_SMP
Thanks a lot Miklos!
Your bisecting faster than I do.
Let's dig into the issue!
Thanks,
//richard
And the backtrace:
#0 0x77866457 in kill ()
Am 10.12.2014 um 12:03 schrieb Arnd Bergmann:
On Wednesday 10 December 2014 11:49:23 Richard Weinberger wrote:
Hi!
Am 10.12.2014 um 11:46 schrieb Miklos Szeredi:
The guilty commit is:
00f634bc522d asm-generic: add generic futex for !CONFIG_SMP
Thanks a lot Miklos!
Your bisecting faster
Am 10.12.2014 um 12:59 schrieb Geert Uytterhoeven:
On Wed, Dec 10, 2014 at 11:49 AM, Richard Weinberger rich...@nod.at wrote:
Am 10.12.2014 um 11:46 schrieb Miklos Szeredi:
The guilty commit is:
00f634bc522d asm-generic: add generic futex for !CONFIG_SMP
Thanks a lot Miklos!
Your
...@szeredi.hu
Suggested-by: Geert Uytterhoeven ge...@linux-m68k.org
Signed-off-by: Richard Weinberger rich...@nod.at
---
arch/um/Kconfig.common | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/um/Kconfig.common b/arch/um/Kconfig.common
index 87bc868..d195a87 100644
--- a/arch/um/Kconfig.common
On Sun, Jan 18, 2015 at 1:27 PM, Thomas Meyer tho...@m3y3r.de wrote:
Hi,
Any news. On this?
http://sourceforge.net/p/user-mode-linux/mailman/message/32947218/
http://sourceforge.net/p/user-mode-linux/mailman/message/32947219/
Since commit 9af2452a1839 (um: Include generic barrier.h)
UML uses the generic barrier.h, remove this orphaned file.
Reported-by: Borislav Petkov b...@suse.de
Signed-off-by: Richard Weinberger rich...@nod.at
---
arch/x86/um/asm/barrier.h | 71 ---
1
On Tue, Jun 24, 2014 at 10:52 PM, Toralf Förster toralf.foers...@gmx.de wrote:
IIRC in former times I could assign an UML instance 2047M, but nowadays
even 2044M is too big.
This depends on the host side. UML heavily depends on the host memory layout.
Now with ASLR and such stuff the layout
Am 10.01.2015 um 17:08 schrieb Toralf Förster:
yes, it never worked with values above 2026M (tested at an old ThinkPad T420,
running a 32 bit Gentoo Linux with host kernel 3.17.4 )
The theoretical max. was always 2GiB due to the limited address space on ia32.
2GiB - UML binary - ASLR
Am 10.01.2015 um 19:11 schrieb Toralf Förster:
On 01/10/2015 06:45 PM, Richard Weinberger wrote:
Am 10.01.2015 um 18:37 schrieb Toralf Förster:
On 01/10/2015 06:25 PM, Richard Weinberger wrote:
Am 10.01.2015 um 17:08 schrieb Toralf Förster:
yes, it never worked with values above 2026M (tested
.
Daniel Borkmann (1):
x86, um: actually mark system call tables readonly
Richard Weinberger (1):
um: Skip futex_atomic_cmpxchg_inatomic() test
arch/um/Kconfig.common | 1 +
arch/x86/um/sys_call_table_32.c | 2 +-
arch/x86/um
Am 15.03.2015 um 13:07 schrieb Toralf Förster:
On 03/15/2015 12:27 PM, Richard Weinberger wrote:
found the culprit :
CONFIG_MPENTIUMM=y works where CONFIG_MCORE2=y do not work
I do have an i5:
I have to double check this. Maybe you hint an UML bug.
processor : 3
vendor_id
Am 15.03.2015 um 13:07 schrieb Toralf Förster:
On 03/15/2015 12:27 PM, Richard Weinberger wrote:
found the culprit :
CONFIG_MPENTIUMM=y works where CONFIG_MCORE2=y do not work
BTW: Just ran a x86 UML with CONFIG_MCORE2=y. Works perfectly fine.
But I have a different CPU.
Thanks,
//richard
Am 15.03.2015 um 11:54 schrieb Toralf Förster:
On 03/13/2015 03:31 PM, Richard Weinberger wrote:
And what about a regular unhardened host?
Does it work if you boot a random x86_64 livecd?
tested with GRML - failed too.
BTW: In GRML you need to remount /dev/shm with exec. Did you?
Thanks
Am 15.03.2015 um 11:54 schrieb Toralf Förster:
On 03/13/2015 03:31 PM, Richard Weinberger wrote:
And what about a regular unhardened host?
Does it work if you boot a random x86_64 livecd?
tested with GRML - failed too.
(And I switched the compiler to gcc-4.8.3-vanilla before and compiled
Am 16.03.2015 um 13:03 schrieb Geert Uytterhoeven:
On Mon, Mar 16, 2015 at 12:41 PM, Richard Weinberger rich...@nod.at wrote:
--- a/fs/hostfs/hostfs_kern.c
+++ b/fs/hostfs/hostfs_kern.c
@@ -105,11 +105,10 @@ static char *__dentry_name(struct dentry *dentry, char
*name)
This code looks
There is really no point in having a function with 10
arguments.
Reported-by: Daniel Walter d.wal...@0x90.at
Signed-off-by: Richard Weinberger rich...@nod.at
---
fs/hostfs/hostfs.h | 3 +--
fs/hostfs/hostfs_kern.c | 5 +
fs/hostfs/hostfs_user.c | 17 +++--
3 files changed
Only initialize what we really need.
Signed-off-by: Richard Weinberger rich...@nod.at
---
fs/hostfs/hostfs_kern.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/fs/hostfs/hostfs_kern.c b/fs/hostfs/hostfs_kern.c
index 80ced3d..cf80a30 100644
--- a/fs/hostfs/hostfs_kern.c
...otherwise we might end up with an incorrect mode mode.
Signed-off-by: Richard Weinberger rich...@nod.at
---
fs/hostfs/hostfs_kern.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/fs/hostfs/hostfs_kern.c b/fs/hostfs/hostfs_kern.c
index 8bbceae..80ced3d 100644
--- a/fs/hostfs
hostfs' __dentry_name() relies on the fact that dentry_path_raw() will place
the path name at the end of the provided buffer.
While this is okay, add a BUG_ON() to detect behavior changes as soon
as possible.
Signed-off-by: Richard Weinberger rich...@nod.at
---
fs/hostfs/hostfs_kern.c | 7
speaking correct common userspace
like dpkg(1) stumbles over that and makes it impossible to use
hostfs as root filesystem.
The fix is easy, wire up the existing host open/fsync functions
to the directory file operations.
Reported-by: Daniel Gröber d...@darkboxed.org
Signed-off-by: Richard Weinberger
The kernel offers a helper function for that, use it.
Signed-off-by: Richard Weinberger rich...@nod.at
---
fs/hostfs/hostfs_kern.c | 6 ++
1 file changed, 2 insertions(+), 4 deletions(-)
diff --git a/fs/hostfs/hostfs_kern.c b/fs/hostfs/hostfs_kern.c
index f154747..f82f98a5 100644
--- a/fs
Signed-off-by: Richard Weinberger rich...@nod.at
---
fs/hostfs/hostfs_kern.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/fs/hostfs/hostfs_kern.c b/fs/hostfs/hostfs_kern.c
index 06b3e3f..8bbceae 100644
--- a/fs/hostfs/hostfs_kern.c
+++ b/fs/hostfs/hostfs_kern.c
@@ -318,9
...to make life easier for future readers of that code.
Signed-off-by: Richard Weinberger rich...@nod.at
---
fs/hostfs/hostfs_kern.c | 14 --
1 file changed, 8 insertions(+), 6 deletions(-)
diff --git a/fs/hostfs/hostfs_kern.c b/fs/hostfs/hostfs_kern.c
index 8163aac..67e556c 100644
hostfs has an append mount option. Report it.
Signed-off-by: Richard Weinberger rich...@nod.at
---
fs/hostfs/hostfs_kern.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/fs/hostfs/hostfs_kern.c b/fs/hostfs/hostfs_kern.c
index c60d886..06b3e3f 100644
--- a/fs/hostfs/hostfs_kern.c
+++ b/fs
In case of a race between to callers of hostfs_file_open()
it can happen that a file describtor is leaked.
Signed-off-by: Richard Weinberger rich...@nod.at
---
fs/hostfs/hostfs_kern.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/fs/hostfs/hostfs_kern.c b/fs/hostfs/hostfs_kern.c
index
Instead of serializing hostfs_file_open() we can use
a per inode mutex to protect -mode.
Signed-off-by: Richard Weinberger rich...@nod.at
---
fs/hostfs/hostfs_kern.c | 13 +++--
1 file changed, 7 insertions(+), 6 deletions(-)
diff --git a/fs/hostfs/hostfs_kern.c b/fs/hostfs
Signed-off-by: Richard Weinberger rich...@nod.at
---
fs/hostfs/hostfs_kern.c | 9 -
1 file changed, 4 insertions(+), 5 deletions(-)
diff --git a/fs/hostfs/hostfs_kern.c b/fs/hostfs/hostfs_kern.c
index 3082a7e..7260f16 100644
--- a/fs/hostfs/hostfs_kern.c
+++ b/fs/hostfs/hostfs_kern.c
Make sure that we return EIO if one passes an invalid st.mode
into hostfs.
Signed-off-by: Richard Weinberger rich...@nod.at
---
fs/hostfs/hostfs_kern.c | 6 --
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/fs/hostfs/hostfs_kern.c b/fs/hostfs/hostfs_kern.c
index 92b008f
Be consistent with all other functions in hostfs and just
use __getname().
Signed-off-by: Richard Weinberger rich...@nod.at
---
fs/hostfs/hostfs_kern.c | 25 +++--
1 file changed, 11 insertions(+), 14 deletions(-)
diff --git a/fs/hostfs/hostfs_kern.c b/fs/hostfs
Host got a visit from the janitor.
[PATCH 01/15] hostfs: hostfs_file_open: Switch to data locking model
[PATCH 02/15] hostfs: hostfs_file_open: Fix a fd leak in
[PATCH 03/15] hostfs: Allow fsync on directories
[PATCH 04/15] hostfs: Handle bogus st.mode
[PATCH 05/15] hostfs: Make hostfs_readpage
Am 15.03.2015 um 17:51 schrieb Toralf Förster:
On 03/15/2015 03:36 PM, Richard Weinberger wrote:
BTW: Just ran a x86 UML with CONFIG_MCORE2=y. Works perfectly fine.
The picture isn't clear.
After twiddling with the kernel config I got a working .config with CORE2=y.
This runs fine
Am 20.03.2015 um 16:53 schrieb Laurent Dufour:
Some architecture would like to be triggered when a memory area is moved
through the mremap system call.
This patch is introducing a new arch_remap mm hook which is placed in the
path of mremap, and is called before the old area is unmapped (and
Am 16.03.2015 um 14:23 schrieb Toralf Förster:
On 03/15/2015 05:56 PM, Richard Weinberger wrote:
Then please move the hardened gcc to /dev/null. ;-)
yes, at least to compile the UML linux
If you can tell me what hardening feature is the root cause I can think of a
solution
On Sun, Mar 8, 2015 at 10:13 PM, Toralf Förster toralf.foers...@gmx.de wrote:
Well, in fact, since I switched from x86 to amd64 under Gentoo, I never
managed to get that chroot to be booted.
During boot of the UML guest it just hangs around devtmpfs: mounted w/o
any output
Booting a
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