Re: [Kernel-packages] [Bug 1789131] Re: Probable regression with EXT3 file systems and CVE-2018-1093 patches

2018-08-28 Thread Sarah Newman
On 08/28/2018 09:49 AM, Joseph Salisbury wrote: > This is probably the fix: > 22be37acce25 ext4: fix bitmap position validation > > I built a test kernel with commit 22be37acce25. The test kernel can be > downloaded from: > http://kernel.ubuntu.com/~jsalisbury/lp1789131 > > Can you test this

Re: [Kernel-packages] [Bug 1789131] Re: Probable regression with EXT3 file systems and CVE-2018-1093 patches

2018-08-27 Thread Sarah Newman
On 08/27/2018 01:21 PM, Joseph Salisbury wrote: > Does 3.13.0-157.207 exhibit the bug and 3.13.0-156.206 does not? If > that is the case, we can perform a bisect to identify the offending > commit. That is correct. -- You received this bug notification because you are a member of Kernel

Re: [Kernel-packages] [Bug 1789131] Re: Probable regression with EXT3 file systems and CVE-2018-1093 patches

2018-08-27 Thread Sarah Newman
On 08/27/2018 11:16 AM, Joseph Salisbury wrote: > The specific version to test is 3.13.0-158. > No, that doesn't fix it. root@scratch2:~# uname -a Linux scratch2 3.13.0-158-generic #208-Ubuntu SMP Fri Aug 24 17:07:38 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux root@scratch2:~# dmesg | grep mount [

[Kernel-packages] [Bug 1789131] Re: Probable regression with EXT3 file systems and CVE-2018-1093 patches

2018-08-26 Thread Sarah Newman
This problem doesn't show up in 4.4.0-134-generic. -- 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/1789131 Title: Probable regression with EXT3 file systems and CVE-2018-1093 patches

[Kernel-packages] [Bug 1789131] Re: Probable regression with EXT3 file systems and CVE-2018-1093 patches

2018-08-26 Thread Sarah Newman
As for running apport-collect 1789131 This doesn't appear to work well in a headless system with a minimal install. I believe I've given all the necessary details for reproducing the issue. ** Changed in: linux (Ubuntu) Status: Incomplete => Confirmed -- You received this bug

[Kernel-packages] [Bug 1789131] Re: Probable regression with EXT3 file systems and CVE-2018-1093 patches

2018-08-26 Thread Sarah Newman
I believe a command sequence like this can be used to reliably reproduce the issue: umount /mnt truncate -s128m /tmp/test.img cmd="/sbin/mkfs.ext3 -E stride=128,stripe_width=512 -F /tmp/test.img" echo $cmd > /dev/kmsg $cmd mount -o loop /tmp/test.img /mnt/ while dd if=/dev/zero of=/mnt/$RANDOM

[Kernel-packages] [Bug 1789131] Re: Probable regression with EXT3 file systems and CVE-2018-1093 patches

2018-08-26 Thread Sarah Newman
I confirmed that adding "-E stride=128,stripe_width=512" to the call to mkfs results gets the following errors almost immediately at boot with 3.13.0-157.207: [5.680480] EXT4-fs error (device xvda1): ext4_validate_block_bitmap:376: comm mountall: bg 213: block 7007360: invalid block bitmap [

[Kernel-packages] [Bug 1789131] Re: Probable regression with EXT3 file systems and CVE-2018-1093 patches

2018-08-26 Thread Sarah Newman
I noticed the unusual thing here is: RAID stride: 128 RAID stripe width: 512 I'm going to do some testing around this to see if it's related. It could be this is the issue and not anything EXT3 vs. EXT4. -- You received this bug notification because you are a member of Kernel Packages, which

[Kernel-packages] [Bug 1789131] [NEW] Probable regression with EXT3 file systems and CVE-2018-1093 patches

2018-08-26 Thread Sarah Newman
Public bug reported: A customer reported on all of their ext3 and none of their ext4 systems that the file system was in read-only mode, I believe after rebooting into 3.13.0-157.207 from 3.13.0-156.206. Here is the output of tune2fs -l for one of the file systems: tune2fs 1.42.12 (29-Aug-2014)

[Kernel-packages] [Bug 1626564] Re: 4.8 regression: SLAB is being used instead of SLUB

2016-10-27 Thread Sarah Newman
Also: the 524 threads was with Xen PVM and two VCPUS. With one VCPU the problem goes away. The run on 4.8.0-22-generic also had two VCPUs. There is no problem with Xen HVM and 4.8.0-26-generic with either one or two VCPUS. -- You received this bug notification because you are a member of Kernel

[Kernel-packages] [Bug 1626564] Re: 4.8 regression: SLAB is being used instead of SLUB

2016-10-27 Thread Sarah Newman
Are you sure SLAB vs. SLUB fixed this? I have images built from October 13 and today (October 22) with 4.8.0-22-generic and 4.8.0-26-generic respectively. On a 4.8.0-22-generic boot there are 37 kworker threads, on 4.8.0-26-generic there are 524 kworker threads. It could be that with enough

[Kernel-packages] [Bug 894272] Re: ipv6 broken for bridge

2013-11-27 Thread Sarah Newman
Hi, I am using 12.04 and that particular sequence appears to be expected behavior due to duplicate address detection in ipv6 leading to the ipv6 address being tentative. I see similar behavior on an ethernet port which has never physically been connected to anything. Before attaching anything