[Bug 1882039] Re: The thread level parallelism would be a bottleneck when searching for the shared pmd by using hugetlbfs

2020-08-25 Thread Gavin Guo
** Tags removed: verification-needed-bionic verification-needed-focal ** Tags added: verification-done-bionic verification-done-focal -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1882039 Title: The

[Bug 1882039] Re: The thread level parallelism would be a bottleneck when searching for the shared pmd by using hugetlbfs

2020-07-07 Thread Gavin Guo
** Tags removed: verification-needed-eoan ** Tags added: verification-done-eoan -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1882039 Title: The thread level parallelism would be a bottleneck when s

[Bug 1882039] Re: The thread level parallelism would be a bottleneck when searching for the shared pmd by using hugetlbfs

2020-06-04 Thread Gavin Guo
** Also affects: linux (Ubuntu Eoan) Importance: Undecided Status: New ** Also affects: linux (Ubuntu Focal) Importance: Undecided Status: New ** Also affects: linux (Ubuntu Bionic) Importance: Undecided Status: New -- You received this bug notification because you

[Bug 1882039] [NEW] The thread level parallelism would be a bottleneck when searching for the shared pmd by using hugetlbfs

2020-06-04 Thread Gavin Guo
ification is only in replacing the write lock to a read one. And there is no modification inside the loop. The regression probability is low. ** Affects: linux (Ubuntu) Importance: Undecided Assignee: Gavin Guo (mimi0213kimo) Status: New ** Tags: sts -- You received this bug noti

[Bug 1802021] Re: [Hyper-V] srcu: Lock srcu_data structure in srcu_gp_start()

2018-12-12 Thread Gavin Guo
Hi Joshua, I just reviewed the commit Joseph provided in the launchpad. It's the same as the two patches I backported. eb4c2382272a srcu: Lock srcu_data structure in srcu_gp_start() d633198088bd srcu: Prohibit call_srcu() use under raw spinlocks The commit id eb4c2382272a is the latest linux-nex

[Bug 1764956] Re: Guests using IBRS incur a large performance penalty

2018-11-29 Thread Gavin Guo
** Changed in: linux (Ubuntu Xenial) Assignee: Guilherme G. Piccoli (gpiccoli) => Gavin Guo (mimi0213kimo) ** Changed in: linux (Ubuntu) Assignee: Guilherme G. Piccoli (gpiccoli) => Gavin Guo (mimi0213kimo) -- You received this bug notification because you are a member of Ubunt

[Bug 1801878] Re: NULL pointer dereference at 0000000000000020 when access dst_orig->ops->family in function xfrm_lookup_with_ifid()

2018-11-26 Thread Gavin Guo
** Tags removed: verification-needed-bionic verification-needed-cosmic verification-needed-xenial ** Tags added: verification-done-bionic verification-done-cosmic verification-done-xenial -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubunt

[Bug 1801878] Re: NULL pointer dereference at 0000000000000020 when access dst_orig->ops->family in function xfrm_lookup_with_ifid()

2018-11-06 Thread Gavin Guo
** Description changed: - [267265.140511] BUG: unable to handle kernel NULL pointer dereference at 0020 - [267265.144406] IP: xfrm_lookup+0x31/0x870 - [267265.146224] PGD 0 P4D 0 - [267265.147469] Oops: [#1] SMP PTI - [267265.149141] Modules linked in: xt_iprange xt_nat ipt_M

[Bug 1801878] [NEW] NULL pointer dereference at 0000000000000020 when access dst_orig->ops->family in function xfrm_lookup_with_ifid()

2018-11-06 Thread Gavin Guo
Assignee: Gavin Guo (mimi0213kimo) Status: Incomplete ** Tags: bionic -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1801878 Title: NULL pointer dereference at 0020 when

[Bug 1791286] Re: The VM hang happens because of pending interrupts not reinjected when migrating the VM several times

2018-10-09 Thread Gavin Guo
** Tags removed: verification-needed-trusty ** Tags added: verification-done-trusty -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1791286 Title: The VM hang happens because of pending interrupts not

[Bug 1791286] Re: The VM hang happens because of pending interrupts not reinjected when migrating the VM several times

2018-09-07 Thread Gavin Guo
** Description changed: - VM hang because of pening interrups not reinjected. + [Impact] + + After the VM(Guest OS is Windows Server 2012R2) has been live-migrated + several times, the screen is blacked out or freeze when the VM is + connected via VNC. + + The Windows Guest OS Server has been in

[Bug 1791286] [NEW] The VM hang happens because of pending interrupts not reinjected when migrating the VM several times

2018-09-07 Thread Gavin Guo
Public bug reported: VM hang because of pening interrups not reinjected. ** Affects: linux (Ubuntu) Importance: Undecided Assignee: Gavin Guo (mimi0213kimo) Status: Incomplete ** Tags: sts -- You received this bug notification because you are a member of Ubuntu Bugs, which

[Bug 1775326] Re: The kernel NULL pointer dereference happens when accessing the task_struct by task_cpu() in function cpuacct_charge()

2018-06-21 Thread Gavin Guo
** Tags removed: verification-needed-xenial ** Tags added: verification-done-xenial -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1775326 Title: The kernel NULL pointer dereference happens when acce

[Bug 1775326] Re: The kernel NULL pointer dereference happens when accessing the task_struct by task_cpu() in function cpuacct_charge()

2018-06-05 Thread Gavin Guo
** Summary changed: - The kernel NULL pointer dereference happens when accessing the task by task_cpu() in function cpuacct_charge() + The kernel NULL pointer dereference happens when accessing the task_struct by task_cpu() in function cpuacct_charge() -- You received this bug notification bec

[Bug 1775326] [NEW] The kernel NULL pointer dereference happens when accessing the task_struct by task_cpu() in function cpuacct_charge()

2018-06-05 Thread Gavin Guo
d by the Qemu and cannot be reproduced. ** Affects: linux (Ubuntu) Importance: Undecided Assignee: Gavin Guo (mimi0213kimo) Status: Incomplete ** Tags: sts xenial -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed

[Bug 1771480] Re: WARNING: CPU: 28 PID: 34085 at /build/linux-90Gc2C/linux-3.13.0/net/core/dev.c:1433 dev_disable_lro+0x87/0x90()

2018-05-15 Thread Gavin Guo
** Attachment added: "kern.log" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1771480/+attachment/5140100/+files/kern.log -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1771480 Title: WARN

[Bug 1771480] Re: WARNING: CPU: 28 PID: 34085 at /build/linux-90Gc2C/linux-3.13.0/net/core/dev.c:1433 dev_disable_lro+0x87/0x90()

2018-05-15 Thread Gavin Guo
This occurred during the deployment of the DPDK compute. The DPDK was not deployed. The bond0 and bond1 configuration appears to have failed. ---8<--- Preliminary analysis: the LRO appears to be off after the kernel traces, despite the message. I am inquiring as to the nature of t

[Bug 1771480] [NEW] WARNING: CPU: 28 PID: 34085 at /build/linux-90Gc2C/linux-3.13.0/net/core/dev.c:1433 dev_disable_lro+0x87/0x90()

2018-05-15 Thread Gavin Guo
Public bug reported: I have multiple instances of this dev_disable_lro error in kern.log. Also seeing this: systemd-udevd[1452]: timeout: killing 'bridge-network-interface' [2765] <4>May 1 22:56:42 xxx kernel: [ 404.520990] bonding: bond0: Warning: No 802.3ad response from the link partner for

[Bug 1747896] Re: OOM and High CPU utilization in update_blocked_averages because of too many cfs_rqs in rq->leaf_cfs_rq_list

2018-03-23 Thread Gavin Guo
** Tags removed: verification-needed-xenial ** Tags added: verification-done-xenial -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1747896 Title: OOM and High CPU utilization in update_blocked_averag

[Bug 1747896] [NEW] OOM and High CPU utilization in update_blocked_averages because of too many cfs_rqs in rq->leaf_cfs_rq_list

2018-02-07 Thread Gavin Guo
Importance: Undecided Assignee: Gavin Guo (mimi0213kimo) Status: Incomplete ** Tags: sts ** Attachment added: "flamegraph of the high CPU utilization symptom" https://bugs.launchpad.net/bugs/1747896/+attachment/5050575/+files/2018-01-31_07-38-45.perf.data.svg -- Y

[Bug 1730852] Re: Device hotplugging with MPT SAS cannot work for VMWare ESXi

2017-12-03 Thread Gavin Guo
** Tags removed: verification-needed-artful verification-needed-zesty ** Tags added: verification-done-artful verification-done-zesty -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1730852 Title: Dev

[Bug 1730852] Re: Device hotplugging with MPT SAS cannot work for VMWare ESXi

2017-12-03 Thread Gavin Guo
** Tags removed: verification-needed-xenial ** Tags added: verification-done-xenial -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1730852 Title: Device hotplugging with MPT SAS cannot work for VMWar

[Bug 1728489] Re: tar -x sometimes fails on overlayfs

2017-11-29 Thread Gavin Guo
** Tags removed: verification-needed-xenial verification-needed-zesty ** Tags added: verification-done-xenial verification-done-zesty -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1728489 Title: tar

[Bug 1729256] Re: Invalid btree pointer causes the kernel NULL pointer dereference

2017-11-29 Thread Gavin Guo
** Tags removed: verification-needed-xenial verification-needed-zesty ** Tags added: verification-done-xenial verification-done-zesty -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1729256 Title: Inv

[Bug 1730852] [NEW] Device hotplugging with MPT SAS cannot work for VMWare ESXi

2017-11-07 Thread Gavin Guo
failed to detect new drives from within a VMWare ESXi environment. [Test] The patch has been verified based on the Ubuntu kernel v4.4.0-97.120. ** Affects: linux (Ubuntu) Importance: Undecided Assignee: Gavin Guo (mimi0213kimo) Status: New ** Tags: sts -- You received this

[Bug 1729256] Re: Invalid btree pointer causes the kernel NULL pointer dereference

2017-11-02 Thread Gavin Guo
** Description changed: [Impact] The frequent kernel errors can be see inside the XFS based OSD processes and it causes to crash and restart. BUG: unable to handle kernel NULL pointer dereference at 00a0 IP: [] xfs_da3_node_read+0x30/0xb0 [xfs] CPU: 8 PID: 2855031 Comm:

[Bug 1729256] [NEW] Invalid btree pointer causes the kernel NULL pointer dereference

2017-11-01 Thread Gavin Guo
to proceed. [Test] The patch has been tested. ** Affects: linux (Ubuntu) Importance: Undecided Assignee: Gavin Guo (mimi0213kimo) Status: New ** Tags: sts -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubu

[Bug 1680513] Re: Migrating KSM page causes the VM lock up as the KSM page merging list is too large

2017-09-06 Thread Gavin Guo
** Tags removed: verification-needed-xenial ** Tags added: verification-done-xenial -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1680513 Title: Migrating KSM page causes the VM lock up as the KSM p

[Bug 1680513] Re: Migrating KSM page causes the VM lock up as the KSM page merging list is too large

2017-08-18 Thread Gavin Guo
** Tags removed: verification-needed-zesty ** Tags added: verification-done-zesty -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1680513 Title: Migrating KSM page causes the VM lock up as the KSM pag

[Bug 1683982] Re: net/ipv4: original ingress device index set as the loopback interface.

2017-04-19 Thread Gavin Guo
@Joseph Salisbury, Yes, Jorge has identified the bug and will send out the SRU patches. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1683982 Title: net/ipv4: original ingress device index set as t

[Bug 1680513] Re: Migrating KSM page causes the VM lock up as the KSM page merging list is too large

2017-04-18 Thread Gavin Guo
** Description changed: [Impact] After numad is enabled and there are several VMs running on the same host machine(host kernel version: 4.4.0-72-generic #93), the softlockup messages can be observed inside the VMs' dmesg. First, the crashdump was captured when the symptom was observed

[Bug 1680513] Re: Migrating KSM page causes the VM lock up as the KSM page merging list is too large

2017-04-14 Thread Gavin Guo
** Description changed: [Impact] After numad is enabled and there are several VMs running on the same host machine(host kernel version: 4.4.0-72-generic #93), the softlockup messages can be observed inside the VMs' dmesg. First, the crashdump was captured when the symptom was observed

[Bug 1680513] Re: Migrating KSM page causes the VM lock up as the KSM page merging list is too large

2017-04-13 Thread Gavin Guo
** Description changed: + [Impact] After numad is enabled and there are several VMs running on the same host machine(host kernel version: 4.4.0-72-generic #93), the softlockup messages can be observed inside the VMs' dmesg. First, the crashdump was captured when the symptom was observed

[Bug 1680513] Re: Migrating KSM page causes the VM lock up as the KSM page merging list is too large

2017-04-06 Thread Gavin Guo
** Changed in: linux (Ubuntu) Assignee: (unassigned) => Gavin Guo (mimi0213kimo) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1680513 Title: Migrating KSM page causes the VM lock up as

[Bug 1680513] Re: Migrating KSM page causes the VM lock up as the KSM page merging list is too large

2017-04-06 Thread Gavin Guo
** Description changed: After numad is enabled and there are several VMs running on the same - host machine, the softlockup messages can be observed inside the VMs' - dmesg. + host machine(host kernel version: 4.4.0-72-generic #93), the + softlockup messages can be observed inside the VMs' dmesg

[Bug 1680513] [NEW] Migrating KSM page causes the VM lock up as the KSM page merging list is too large

2017-04-06 Thread Gavin Guo
Public bug reported: After numad is enabled and there are several VMs running on the same host machine(host kernel version: 4.4.0-72-generic #93), the softlockup messages can be observed inside the VMs' dmesg. First, the crashdump was captured when the symptom was observed. At the first glance, i

[Bug 1654542] [NEW] Memory overwritten in qemuProcessReadLog triggers SIGABRT to termiante libvirtd

2017-01-06 Thread Gavin Guo
Public bug reported: The call trace can be observed by bt in the gdb with the coredump of libvirtd: $ gdb /usr/sbin/libvirtd core.compute-0-1.domain.tld.1480020436.libvirtd.26138 (gdb) bt #0 0x7f856dddec37 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56 #1 0x00

[Bug 1598197] Re: deadlock on balloon deflation

2016-07-25 Thread Gavin Guo
@Denis V.Lunev Really sorry for the inconvenience. The patch has already been sent to the mailing list. http://comments.gmane.org/gmane.linux.ubuntu.devel.kernel.general/78486 The fix will be included in the Ubuntu-3.13.0-93.140. -- You received this bug notification because you are a member o

[Bug 1605243] [NEW] iscsi initiator related configs and logs are not recorded

2016-07-21 Thread Gavin Guo
Public bug reported: iscsi useful initiator information such as: 1). etc/iscsi/* 2). iscsiadm -m session -P3 These 2 are useful for debugging the iscsi initiator side bug. However, it's not included by default in the sosreport. ** Affects: sosreport (Ubuntu) Importance: Undecided S

[Bug 1598197] Re: deadlock on balloon deflation

2016-07-10 Thread Gavin Guo
** Changed in: linux (Ubuntu Trusty) Assignee: (unassigned) => Gavin Guo (mimi0213kimo) ** Changed in: linux (Ubuntu) Assignee: (unassigned) => Gavin Guo (mimi0213kimo) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu.

[Bug 1572562] Re: KASan: out of bounds access in isolate_migratepages_range

2016-06-17 Thread Gavin Guo
stress test on the v3.13.0-89.136 with KASan backported. ** Attachment added: "kern.log" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1572562/+attachment/4685474/+files/kern.log -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubun

[Bug 1572562] Re: KASan: out of bounds access in isolate_migratepages_range

2016-06-17 Thread Gavin Guo
I tried to reproduce the bug with the following commands: "./parallel-73670.sh -r 2 -k 40" [1] The error messages cannot be found in the dmesg with the proposed kernel 3.13.0-89.136 with KASan backported[2]. Reference: [1]. http://kernel.ubuntu.com/git/gavinguo/stress-test.git/ [2]. http://ke

[Bug 1572562] Re: KASan: out of bounds access in isolate_migratepages_range

2016-05-15 Thread Gavin Guo
** Description changed: [Impact] In the v3.13.0-76 kernel with KASan backported. The following error message could be observed during the kernel building stress test of the command[1]: "./parallel-73670.sh -r 2 -k 40" That means building 40 kernels in the same time with 2 rounds. Ba

[Bug 1572562] Re: KASan: out of bounds access in isolate_migratepages_range

2016-05-15 Thread Gavin Guo
** Description changed: [Impact] In the v3.13.0-76 kernel with KASan backported. The following error message could be observed during the kernel building stress test of the command[1]: "./parallel-73670.sh -r 2 -k 40" That means building 40 kernels in the same time with 2 rounds. Ba

[Bug 1572562] Re: KASan: out of bounds access in isolate_migratepages_range

2016-05-15 Thread Gavin Guo
** Description changed: + [Impact] In the v3.13.0-76 kernel with KASan backported. The following error message could be observed during the kernel building stress test of the command[1]: "./parallel-73670.sh -r 2 -k 40" That means building 40 kernels in the same time with 2 rounds. Ba

[Bug 1572562] Re: KASan: out of bounds access in isolate_migratepages_range

2016-04-20 Thread Gavin Guo
11 { 312 return ((1UL << (nr & (BITS_PER_LONG-1))) & 313 (addr[nr >> _BITOPS_LONG_SHIFT])) != 0; 314 } + + Reference: + [1]. http://kernel.ubuntu.com/git/gavinguo/stress-test.git/ ** Changed in: linux (Ubuntu) Assignee: (unassigned) => Gav

[Bug 1572562] Re: KASan: out of bounds access in isolate_migratepages_range

2016-04-20 Thread Gavin Guo
The following 2 patches are the solution to the bug: 4d88e6f7d5ff mm/balloon_compaction: fix deflation when compaction is disabled d6d86c0a7f8d mm/balloon_compaction: redesign ballooned pages management Related upstream mailing list discussion: - mm: compaction: buffer overflow in isolate_migrate

[Bug 1572562] [NEW] KASan: out of bounds access in isolate_migratepages_range

2016-04-20 Thread Gavin Guo
Public bug reported: In the v3.13.0-76 kernel with KASan backported. The following error message could be observed during the kernel building stress test of the command: "./parallel-73670.sh -r 2 -k 40" That means building 40 kernels in the same time with 2 rounds. Bad access happens when we read

[Bug 1527643] Re: use after free of task_struct->numa_faults in task_numa_find_cpu

2016-03-25 Thread Gavin Guo
** Tags removed: verification-needed-trusty verification-needed-vivid verification-needed-wily ** Tags added: verification-done-trusty verification-done-vivid verification-done-wily -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. htt

[Bug 1527643] Re: use after free of task_struct->numa_faults in task_numa_find_cpu

2016-03-11 Thread Gavin Guo
** Description changed: [Impact] - The use-after-free invalid read bug, which happens in really tricky case, - would use the numa_faults data already freed for the NUMA balance to make a - decision to migrate the exiting process. + The use-after-free invalid read bug, which happens in really

[Bug 1527643] Re: use after free of task_struct->numa_faults in task_numa_find_cpu

2016-03-11 Thread Gavin Guo
** Description changed: + [Impact] + + The use-after-free invalid read bug, which happens in really tricky case, + would use the numa_faults data already freed for the NUMA balance to make a + decision to migrate the exiting process. + + The bug was found by the Ubuntu-3.13.0-65 with KASan backp

[Bug 1527643] Re: use after free of task_struct->numa_faults in task_numa_find_cpu

2016-03-11 Thread Gavin Guo
Reproducer for the bug. ** Attachment added: "kernel_panic_test.sh" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1527643/+attachment/4595998/+files/kernel_panic_test.sh -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https

[Bug 1534054] Re: use-after-free found by KASAN in blk_mq_register_disk

2016-01-14 Thread Gavin Guo
** Description changed: We are trying to debug the kernel using KASAN and we found that when a VM is booting in our cloud, on the virtualised kernel, there is a use- after-free access that should not be there. The failing VM was running on a host with kernel 3.13.0-66-generic (trusty)

[Bug 1534054] Re: use-after-free found by KASAN in blk_mq_register_disk

2016-01-14 Thread Gavin Guo
** Changed in: linux (Ubuntu) Assignee: (unassigned) => Gavin Guo (mimi0213kimo) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1534054 Title: use-after-free found by KASAN

[Bug 1534054] [NEW] use-after-free found by KASAN in blk_mq_register_disk

2016-01-14 Thread Gavin Guo
Public bug reported: The error message can be observed in the dmesg when the guest VM booted with v3.13.0-65 with KASAN enabled. == BUG: KASan: use after free in blk_mq_register_disk+0x193/0x260 at addr 8801ec247400 Read of size

[Bug 1403282] Re: General protection fault on c->freelist broken with Trusty Tahr

2015-12-18 Thread Gavin Guo
** Tags removed: cts ** Tags added: sts -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1403282 Title: General protection fault on c->freelist broken with Trusty Tahr To manage notifications about th

[Bug 1527643] Re: use after free of task_struct->numa_faults in task_numa_find_cpu

2015-12-18 Thread Gavin Guo
** Description changed: == BUG: KASan: use after free in task_numa_find_cpu+0x64c/0x890 at addr 880dd393ecd8 Read of size 8 by task qemu-system-x86/3998900 =

[Bug 1527643] Re: use after free of task_struct->numa_faults in task_numa_find_cpu

2015-12-18 Thread Gavin Guo
** Description changed: == BUG: KASan: use after free in task_numa_find_cpu+0x64c/0x890 at addr 880dd393ecd8 Read of size 8 by task qemu-system-x86/3998900 =

[Bug 1527643] Re: use after free of task_struct->numa_faults in task_numa_find_cpu

2015-12-18 Thread Gavin Guo
** Description changed: - kernel: [284190.877125] == - kernel: [284190.898773] BUG: KASan: use after free in task_numa_find_cpu+0x64c/0x890 at addr 880dd393ecd8 - kernel: [284190.920765] Read of size 8 by task qemu-system-x86/39

[Bug 1527643] Re: use after free of task_struct->numa_faults in task_numa_find_cpu

2015-12-18 Thread Gavin Guo
** Attachment added: "numa_faults_use_after_free.kern.log" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1527643/+attachment/4536904/+files/numa_faults_use_after_free.kern.log -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu.

[Bug 1527643] [NEW] use after free of task_struct->numa_faults in task_numa_find_cpu

2015-12-18 Thread Gavin Guo
Public bug reported: == BUG: KASan: use after free in task_numa_find_cpu+0x64c/0x890 at addr 880dd393ecd8 Read of size 8 by task qemu-system-x86/3998900

[Bug 1403282] Re: General protection fault on c->freelist broken with Trusty Tahr

2015-10-29 Thread Gavin Guo
Currently, the bug cannot be reproduced in the original platform. However, there is another platform has similar symptom. And the bug can be captured by Kasan(Kernel Address Sanitizer) backported on the v3.13.0-52.86. The source code: http://kernel.ubuntu.com/git/gavinguo/ubuntu-trusty-amd64.git/l

[Bug 1403282] Re: General protection fault on c->freelist broken with Trusty Tahr

2015-10-29 Thread Gavin Guo
** Attachment added: "awk.kern.log" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1403282/+attachment/4508426/+files/awk.kern.log -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1403282 Title

[Bug 1488035] Re: OSDs Linked list corruption causes kernel BUG at /build/buildd/linux-3.13.0/net/ceph/osd_client.c:892!

2015-09-17 Thread Gavin Guo
** Tags removed: verification-needed-trusty ** Tags added: verification-done-trusty -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1488035 Title: OSDs Linked list corruption causes kernel BUG at /b

[Bug 1488035] Re: OSDs Linked list corruption causes kernel BUG at /build/buildd/linux-3.13.0/net/ceph/osd_client.c:892!

2015-08-25 Thread Gavin Guo
** Description changed: [Impact] The node which mounts a ceph rbd volume causes a panic when all OSD daemons on the all ceph nodes are restarted. - [642981.871592] [ cut here ] + [642981.871592] [ cut here ] [642981.912255] kernel BUG

[Bug 1488035] Re: OSDs Linked list corruption causes kernel BUG at /build/buildd/linux-3.13.0/net/ceph/osd_client.c:892!

2015-08-24 Thread Gavin Guo
if there is panics. ** Changed in: linux (Ubuntu) Assignee: (unassigned) => Gavin Guo (mimi0213kimo) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1488035 Title: OSDs Linked list corrupt

[Bug 1488035] [NEW] OSDs Linked list corruption causes kernel BUG at /build/buildd/linux-3.13.0/net/ceph/osd_client.c:892!

2015-08-24 Thread Gavin Guo
Public bug reported: [Impact] [Fix] [Test Case] ** Affects: linux (Ubuntu) Importance: Undecided Status: Incomplete ** Tags: sts trusty -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1

[Bug 1475204] Re: Fix kmalloc slab creation sequence

2015-08-07 Thread Gavin Guo
** Tags removed: verification-needed-trusty verification-needed-vivid ** Tags added: verification-done-trusty verification-done-vivid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1475204 Title: Fix

[Bug 1475204] Re: Fix kmalloc slab creation sequence

2015-07-20 Thread Gavin Guo
[a...@linux-foundation.org: s/kmalloc_names/kmalloc_info/, tweak comment text] Signed-off-by: Gavin Guo Acked-by: Christoph Lameter Cc: Pekka Enberg Cc: David Rientjes Cc: Joonsoo Kim Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[Bug 1475204] Re: Fix kmalloc slab creation sequence

2015-07-20 Thread Gavin Guo
** Changed in: linux (Ubuntu) Assignee: (unassigned) => Gavin Guo (mimi0213kimo) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1475204 Title: Fix kmalloc slab creation sequence To man

[Bug 1475204] Re: Fix kmalloc slab creation sequence

2015-07-16 Thread Gavin Guo
[a...@linux-foundation.org: s/kmalloc_names/kmalloc_info/, tweak comment text] Signed-off-by: Gavin Guo Acked-by: Christoph Lameter Cc: Pekka Enberg Cc: David Rientjes Cc: Joonsoo Kim Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[Bug 1475204] [NEW] Fix kmalloc slab creation sequence

2015-07-16 Thread Gavin Guo
nd 64-bit x86 if you have CONFIG_SLAB enabled. When I switched to CONFIG_SLUB, the kernel boots. So it appears this commit is breaking kernel configurations with CONFIG_SLAB enabled. It bisects down to: commit 4066c33d0308f87e9a3b0c7fafb9141c0bfbfa77 Author: Gavin Guo Date: Wed Jun 24 16:55:54

[Bug 1432848] Re: ethtool -t ethX failing with Ubuntu 15.04 (3.19.0-8-generic) (Mellanox)

2015-07-10 Thread Gavin Guo
@Kamal, Thanks for your verification. I'll modify the tag verification-needed- vivid to verification-done-vivid. ** Tags removed: verification-needed-vivid ** Tags added: verification-done-vivid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed t

[Bug 1432848] Re: ethtool -t ethX failing with Ubuntu 15.04 (3.19.0-8-generic) (Mellanox)

2015-07-09 Thread Gavin Guo
Hi Clsoto, Tinoco is on vacation now, I'm his proxy. And I saw you have tested the kernel to verify the ethtool. Really thanks for your effort to do that. Except on thing that I saw the kernel version Linux powerio-le13 3.19.0-15-generic #15-Ubuntu SMP Thu Apr 16 23:32:13 UTC 2015 ppc64le ppc64le

[Bug 1456952] Re: support the slub_debug boot option on specific object size

2015-07-09 Thread Gavin Guo
** Tags removed: verification-needed-vivid ** Tags added: verification-done-vivid ** Tags removed: verification-needed-utopic ** Tags added: verification-done-utopic ** Tags removed: verification-needed-trusty ** Tags added: verification-done-trusty -- You received this bug notification because

[Bug 1456952] Re: support the slub_debug boot option on specific object size

2015-05-22 Thread Gavin Guo
** Tags added: utopic vivid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1456952 Title: support the slub_debug boot option on specific object size To manage notifications about this bug go to: htt

[Bug 1456952] Re: support the slub_debug boot option on specific object size

2015-05-20 Thread Gavin Guo
** Description changed: [Impact] slub_debug cannot work for specific kmem_cache size. e. g. slub_debug=PU,kmalloc-1024 The slub_debug is used to enable the debugging of use-after-free, poison overwritten, double free. And it also increases the up time of the server when the ab

[Bug 1456952] Re: support the slub_debug boot option on specific object size

2015-05-20 Thread Gavin Guo
[Test case] ** Changed in: linux (Ubuntu) Assignee: (unassigned) => Gavin Guo (mimi0213kimo) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1456952 Title: support the slub_debug boot option on s

[Bug 1456952] [NEW] support the slub_debug boot option on specific object size

2015-05-20 Thread Gavin Guo
Public bug reported: The slub_debug=PU,kmalloc-xx cannot work because in the create_kmalloc_caches() the s->name is created after the create_kmalloc_cache() is called. The name is NULL in the create_kmalloc_cache() so the kmem_cache_flags() would not set the slub_debug flags to the s->flags. The

[Bug 1439441] Re: Kernel provides incomplete audit information when an existing monitored file is modified

2015-04-20 Thread Gavin Guo
** Tags removed: verification-needed-utopic ** Tags added: verification-done-utopic -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1439441 Title: Kernel provides incomplete audit information when an

[Bug 1439441] Re: Kernel provides incomplete audit information when an existing monitored file is modified

2015-04-20 Thread Gavin Guo
** Tags removed: verification-needed-trusty ** Tags added: verification-done-trusty -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1439441 Title: Kernel provides incomplete audit information when an

[Bug 1439441] Re: Kernel provides incomplete audit information when an existing monitored file is modified

2015-04-02 Thread Gavin Guo
Test of the following kernel fail: linux-image-3.13.0-031300-generic_3.13.0-031300.201401192235_amd64.deb linux-image-3.13.0-24-generic linux-image-3.13.0-46-generic linux-image-3.15.0-031500-generic_3.15.0-031500.201406131105_amd64.deb linux-image-3.17.0-031700-generic_3.17.0-031700.201410060605_a

[Bug 1439441] [NEW] Kernel provides incomplete audit information when an existing monitored file is modified

2015-04-01 Thread Gavin Guo
priority_boost = 3 disp_qos = lossless dispatcher = /sbin/audispd name_format = hostname space_left = 75 space_left_action = SYSLOG action_mail_acct = root admin_space_left = 50 admin_space_left_action = SYSLOG disk_full_action = SYSLOG disk_error_action = SYSLOG - sudo su - # echo "lalal

[Bug 1403282] [NEW] CISCO UCSC-C220-M3S/UCSC-C220-M3S - general protection fault on c->freelist broken with Trusty Tahr

2014-12-16 Thread Gavin Guo
ffects: linux (Ubuntu) Importance: Undecided Assignee: Gavin Guo (mimi0213kimo) Status: In Progress ** Tags: cts trusty ** Attachment added: "dmesg.log" https://bugs.launchpad.net/bugs/1403282/+attachment/4282400/+files/dmesg.log ** Changed in: linux (Ubuntu) Assig

[Bug 1322409] Re: Usb 3.0 device is recognized as usb 2.0 device on usb 3.0 port if the port has been used by usb 3.0 device after booted

2014-09-03 Thread Gavin Guo
** Changed in: linux (Ubuntu) Status: In Progress => Fix Released ** Changed in: hwe-next Status: In Progress => Fix Released -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1322409 Title

[Bug 1345895] Re: [Dell Inspiron 3541] USB3 stick speed drop to 480M after first use

2014-09-03 Thread Gavin Guo
** Changed in: linux (Ubuntu) Status: Confirmed => Fix Released -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1345895 Title: [Dell Inspiron 3541] USB3 stick speed drop to 480M after first use

[Bug 1322409] Re: Usb 3.0 device is recognized as usb 2.0 device on usb 3.0 port if the port has been used by usb 3.0 device after booted

2014-08-19 Thread Gavin Guo
** Tags removed: verification-needed-trusty ** Tags added: verification-done-trusty ** Tags removed: verification-done-trusty ** Tags added: verification-done -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/

[Bug 1322409] Re: Usb 3.0 device is recognized as usb 2.0 device on usb 3.0 port if the port has been used by usb 3.0 device after booted

2014-07-28 Thread Gavin Guo
** Changed in: linux (Ubuntu) Status: New => In Progress -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1322409 Title: Usb 3.0 device is recognized as usb 2.0 device on usb 3.0 port if the p

[Bug 1290189] Re: Unable to hotplug ExpressCard in 12.04.4

2014-06-17 Thread Gavin Guo
orted-and-tested-by: Gavin Guo Acked-by: Bjorn Helgaas Reviewed-by: Mika Westerberg Cc: 3.15+ # 3.15+ Signed-off-by: Rafael J. Wysocki I've tried to cherry-picked the commit. But it caused a lot of conflicts. And I tried to show the difference between v3.13 to v3.16-rc1: Wed

[Bug 1290189] Re: Unable to hotplug ExpressCard in 12.04.4

2014-06-13 Thread Gavin Guo
I've tested with Rafael's cleaner patch on the Lenovo CID 201107-8258. It works fine. As it didn't work on the v3.13 generic. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1290189 Title: Unable to h

[Bug 1290189] Re: Unable to hotplug ExpressCard in 12.04.4

2014-06-09 Thread Gavin Guo
Rafael submitted a patch to the https://bugzilla.kernel.org/show_bug.cgi?id=76901. I've tested and it works fine. Now, I've provided the dmesg for him to check and am waiting for Rafael to give a official commit. -- You received this bug notification because you are a member of Ubuntu Bugs, which

[Bug 1290189] Re: Unable to hotplug ExpressCard in 12.04.4

2014-06-08 Thread Gavin Guo
The bug was reported to https://bugzilla.kernel.org/show_bug.cgi?id=76901. Currently, Mika asked for the support to apply his patch, which adds more debug messages to the suspected function, and get the dmesg log. I've submitted the dmesg for his diagnosis. ** Bug watch added: Linux Kernel Bug Tra

[Bug 1290189] Re: Unable to hotplug ExpressCard in 12.04.4

2014-06-05 Thread Gavin Guo
I've completed the bisect and found 2d8b1d566a5f4874f4d92361f5cdbb50baa396f8 is the first bad commit. The "git bisect log" is also attached. commit 2d8b1d566a5f4874f4d92361f5cdbb50baa396f8 Author: Mika Westerberg Date: Sat Jul 13 20:09:59 2013 +0300 ACPI / hotplug / PCI: Get rid of check_s

[Bug 1290189] Re: Unable to hotplug ExpressCard in 12.04.4

2014-06-03 Thread Gavin Guo
I've built the following commits and it can work so have no clue to do the bisect within this commits. Mon May 26 18:51:24 gavin@gavin-w530:~/os/linux$ git log --pretty=oneline v3.11..v3.12-rc1 drivers/acpi/pci* a9238741987386bb549d61572973c7e62b2a4145 Merge tag 'pci-v3.12-changes' of git://git.

[Bug 1290189] Re: Unable to hotplug ExpressCard in 12.04.4

2014-05-26 Thread Gavin Guo
I spent some times testing and found that the commits causing the regression is between v3.11 and v3.12-rc1. It still needs more times to do the bisect. Mon May 26 19:02:09 gavin@gavin-w530:~/os/linux$ git log --pretty=oneline v3.11..v3.12-rc1 | wc -l 10153 Since there're still 10153 commits lef

[Bug 1091125] Re: Unable to hotplug ExpressCard on 12.04.3

2014-02-13 Thread Gavin Guo
This bug can't be fixed in Raring. As the feature is also available in the 12.04.4, users can upgrade their kernel to use the feature. ** Changed in: linux-lts-raring (Ubuntu) Status: New => Won't Fix -- You received this bug notification because you are a member of Ubuntu Bugs, which is

[Bug 1229576] Re: Webcam preview have half image display and black screen in some resolutions

2013-11-26 Thread Gavin Guo
** Changed in: hwe-next Status: Confirmed => Fix Released -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1229576 Title: Webcam preview have half image display and black screen in some resolu

[Bug 1229576] Re: Webcam preview have half image display and black screen in some resolutions

2013-10-31 Thread Gavin Guo
** Tags removed: verification-needed-quantal ** Tags added: verification-done-quantal -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1229576 Title: Webcam preview have half image display and black sc

[Bug 1229576] Re: Webcam preview have half image display and black screen in some resolutions

2013-09-24 Thread Gavin Guo
** No longer affects: linux-lts-quantal (Ubuntu) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1229576 Title: Webcam preview have half image display and black screen in some resolutions To manage

[Bug 1229576] Re: Webcam preview have half image display and black screen in some resolutions

2013-09-24 Thread Gavin Guo
** Also affects: linux-lts-quantal (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1229576 Title: Webcam preview have half image display and black

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