search for: inject

Xen/MCE: vMCE injection In our test for win8 guest mce, we find a bug that no matter what SRAO/SRAR error xen inject to win8 guest, it always reboot. The root cause is, current Xen vMCE logic inject vMCE# only to vcpu0, this is not correct for Intel MCE (Under Intel arch, h/w generate MCE# to all CPUs). This patch f...

...enabled > > > > > there). > > > > > > > > Are you telling me that you are shaping a debugging functionality basing > > > > on what RHEL has enabled? And you call me evil. This is just rediculous. > > > > > > > > > Fail-injection framework is if off by default and it must be explicitly > > > > > enabled and configured by the user - and most users won't enable it. > > > > > > > > It can be enabled easily. And if you care enough for your debugging > > > > kernel then...

...-) Index: linux-2.6/lib/Kconfig.debug =================================================================== --- linux-2.6.orig/lib/Kconfig.debug 2018-04-16 21:08:36.000000000 +0200 +++ linux-2.6/lib/Kconfig.debug 2018-04-25 15:56:16.000000000 +0200 @@ -1503,6 +1503,10 @@ config NETDEV_NOTIFIER_ERROR_INJECT If unsure, say N. +config FUNCTION_ERROR_INJECTION + def_bool y + depends on HAVE_FUNCTION_ERROR_INJECTION && KPROBES + config FAULT_INJECTION bool "Fault-injection framework" depends on DEBUG_KERNEL @@ -1510,10 +1514,6 @@ config FAULT_INJECTION Provide fault-inje...

On 04/25/2018 01:02 PM, Mikulas Patocka wrote: > > > From: Mikulas Patocka <mpatocka at redhat.com> > Subject: [PATCH v4] fault-injection: introduce kvmalloc fallback options > > This patch introduces a fault-injection option "kvmalloc_fallback". This > option makes kvmalloc randomly fall back to vmalloc. > > Unfortunatelly, some kernel code has bugs - it uses kvmalloc and then Unfortunately, > us...

On 04/25/2018 01:02 PM, Mikulas Patocka wrote: > > > From: Mikulas Patocka <mpatocka at redhat.com> > Subject: [PATCH v4] fault-injection: introduce kvmalloc fallback options > > This patch introduces a fault-injection option "kvmalloc_fallback". This > option makes kvmalloc randomly fall back to vmalloc. > > Unfortunatelly, some kernel code has bugs - it uses kvmalloc and then Unfortunately, > us...

On Tue, 24 Apr 2018, Michal Hocko wrote: > > > Wouldn't it be equally trivial to simply enable the fault injection? You > > > would get additional failure paths testing as a bonus. > > > > The RHEL and Fedora debugging kernels are compiled with fault injection. > > But the fault-injection framework will do nothing unless it is enabled by > > a kernel parameter or debugfs w...

This adds a customize option: virt-customize --ssh-inject USER[=KEY] virt-builder --ssh-inject USER[=KEY] virt-sysprep --ssh-inject USER[=KEY] In each case this either injects the current (host) user's ssh pubkey into the guest user USER (adding it to ~USER/.ssh/authorized_keys in the guest), or you can specify a particular key. For example:...

On Wed, 25 Apr 2018, Randy Dunlap wrote: > On 04/25/2018 01:02 PM, Mikulas Patocka wrote: > > > > > > From: Mikulas Patocka <mpatocka at redhat.com> > > Subject: [PATCH v4] fault-injection: introduce kvmalloc fallback options > > > > This patch introduces a fault-injection option "kvmalloc_fallback". This > > option makes kvmalloc randomly fall back to vmalloc. > > > > Unfortunatelly, some kernel code has bugs - it uses kvmalloc and then &...

Version 1.34.6 (on Debian Stretch) Using virt-builder I tried to create a user and inject my ssh key: virt-builder -v -x centos-7.4 --output testimage --format qcow2 --selinux-relabel --hostname testimage --firstboot-command 'useradd -m -p "" dummy' --firstboot-command 'chage -d 0 dummy' --ssh-inject dummy ... [ 16.1] Installing firstboot command: useradd...

On Wed, 25 Apr 2018, David Rientjes wrote: > On Wed, 25 Apr 2018, Mikulas Patocka wrote: > > > From: Mikulas Patocka <mpatocka at redhat.com> > > Subject: [PATCH] fault-injection: introduce kvmalloc fallback options > > > > This patch introduces a fault-injection option "kvmalloc_fallback". This > > option makes kvmalloc randomly fall back to vmalloc. > > > > Unfortunately, some kernel code has bugs - it uses kvmalloc and then &g...

Hi, I'm a PhD student at UIUC and I am using LLVM to add fault-tolerance capabilities to applications. I would like to evaluate my framework by performing fault-injections (fault-insertions) in the application. Essentially, I want to corrupt an LLVM value at the time of its definition and study the behavior of the program under this condition. I would like to be able to do this in a generic way without recompiling the program between injections (I will not know w...

Patch 2/2 - Add flag to indicate that an exception event needs injecting, and to delay the ext interrupt injection. Remove unnecessary check of RFLAGS.IF for ExtInt injection. Applies cleanly to xen-unstable c/s 11831. Please apply to xen-unstable.hg. We would also want this patch to be in a 3.0.3-1 base whenever that is branched. Signed-off-by: Travis Betak <t...

def webs @webs ||= Web.find(:all).inject({}) { |webs, web| webs.merge(web.address => web) } end -- Posted via http://www.ruby-forum.com/.

Currently, Xen does not support injecting an NMI to HVM guest OS. Adding this feature is necessary for those softwares which depend on NMI to function correctly, such as KDB and oprofile. The attached patch allows NMI to be injected to guest OS in NMIP capable platforms. It also enables to queue an NMI and then inject it as soon as po...

This adds a customize option: virt-customize --ssh-inject USER virt-customize --ssh-inject USER:string:KEY_STRING virt-customize --ssh-inject USER:file:FILENAME (ditto for virt-builder and virt-sysprep) In each case this injects into the guest user USER a) the current (host) user's ssh pubkey b) the key specified as KEY_STRING c) the key in FILE...

Hi Keir, Ian, Today if we stop the guest for debugging using the gdbserver and then continue with the guest execution the PIT finds that the time has gone ahead and it missed to inject so many timer ticks, and it tries to inject all of those one by one. So after the gdb continue command the guest just handles the timer interrupts for a long time before it can do anything else. This patch changes this PIT behavior, if it finds that the guest is being debugged then it does not...

...my programming language. In order to do this, I need to be able to check for overflow of a stack frame. The methods of doing this are outlined in the link above, but my intention is to pass the current stack limit as the first argument to the function. What I'm hoping to do is to be able to inject the following code (in x86 asm, c calling convention) on entry to each function: _foo: lea -frame_size(%esp), %eax cmpl %eax, 4(%esp) jb function_entry // handle overflow function_entry: function prolog ... The problem I'm encountering is how to force this before the prolog. I'...

Hi, My results are getting out of order after I do the following command: count = result.inject({}) { |hsh, row| hsh[row[''name'']] = row[''count''].to_i; hsh } Why? Here are more specifics: My complete method is this (based off of acts_as_taggable code - not'' DHHs, but the original one): def self.sql_to_count_plays(lookback) sql = ["S...

On 4/1/20 5:12 AM, Richard W.M. Jones wrote: > On Tue, Mar 31, 2020 at 04:00:22PM -0500, Eric Blake wrote: >> The retry filter defaults to 5 retries, but when run with verbose >> details produces some confusing output: >> >> $ rm -f /tmp/inject; (sleep 5s; touch /tmp/inject)& ./nbdkit -f -v -U - \ >> null 1G --filter=retry --filter=noextents --filter=error error-rate=100% \ >> error-file=/tmp/inject --filter=delay rdelay=1 \ >> --run 'qemu-img convert $nbd out.img' >> ... >> nbdkit: null[...

Hi everyone, Some Intel processors have a newly disclosed vulnerability named Load Value Injection. One pager on Load Value Injection: https://software.intel.com/security-software-guidance/software-guidance/load-value-injection Deep dive on Load Value Injection: https://software.intel.com/security-software-guidance/insights/deep-dive-load-value-injection I wrote this compiler pass that c...