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re: How to get guaranteed TF for openeuler.org ?
by ETTA 27 Mar '20

27 Mar '20

Here is how, Guranteed TF above 20 or 30 http://www.str8-creative.io/product/trust-flow-seo-package/ That equals immediate higher rankings TF report attached Regards ETTA Unsubscribe option is available on the footer of our website

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[PATCH] KYLIN: hns3: fix a compilation error
by Zhengyuan Liu 25 Mar '20

25 Mar '20

From: Zhengyuan Liu <liuzhengyuan(a)kylinos.cn> Make stack-protector-strong building flag depend on CONFIG_STACKPROTECTOR_STRONG, otherwise there could be a copmilation error: MODPOST 1532 modules ERROR: "__stack_chk_fail" [drivers/net/ethernet/hisilicon/hns3/hns3_cae.ko] undefined! ERROR: "__stack_chk_guard" [drivers/net/ethernet/hisilicon/hns3/hns3_cae.ko] undefined! ERROR: "__stack_chk_fail" [drivers/net/ethernet/hisilicon/hns3/hns3.ko] undefined! ERROR: "__stack_chk_guard" [drivers/net/ethernet/hisilicon/hns3/hns3.ko] undefined! ERROR: "__stack_chk_fail" [drivers/net/ethernet/hisilicon/hns3/hclgevf.ko] undefined! ERROR: "__stack_chk_guard" [drivers/net/ethernet/hisilicon/hns3/hclgevf.ko] undefined! ERROR: "__stack_chk_fail" [drivers/net/ethernet/hisilicon/hns3/hclge.ko] undefined! ERROR: "__stack_chk_guard" [drivers/net/ethernet/hisilicon/hns3/hclge.ko] undefined! make[1]: *** [scripts/Makefile.modpost:92: __modpost] Error 1 Signed-off-by: Zhengyuan Liu <liuzhengyuan(a)kylinos.cn> --- drivers/net/ethernet/hisilicon/hns3/Makefile | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/net/ethernet/hisilicon/hns3/Makefile b/drivers/net/ethernet/hisilicon/hns3/Makefile index 6653e81ede9a..f4952f46be7f 100644 --- a/drivers/net/ethernet/hisilicon/hns3/Makefile +++ b/drivers/net/ethernet/hisilicon/hns3/Makefile @@ -4,7 +4,9 @@ # # Add security options +ifdef CONFIG_STACKPROTECTOR_STRONG ccflags-y += -fstack-protector-strong +endif ccflags-y += -Wl,-z,relro,-z,now ccflags-y += -Wl,-z,noexecstack ccflags-y += -D_FORTIFY_SOURCE=2 -O2 -- 2.20.1

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[PATCH 0/2] livepatch/core: support jump_label
by Cheng Jian 24 Mar '20

24 Mar '20

livepatch/core: support jump_label Cheng Jian (2): livepatch/core: support jump_label livepatch/core: fix kabi for klp_rel_state include/linux/jump_label.h | 1 + include/linux/module.h | 43 +++++++++++++++++++++++++++++++++++++++++++ kernel/jump_label.c | 16 ++++++++++++++++ kernel/livepatch/core.c | 7 +++++++ kernel/module.c | 5 ++++- 5 files changed, 71 insertions(+), 1 deletion(-) -- 2.7.4

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Re: openEuler-1.0是否完整支持mpam功能
by Xie XiuQi 23 Mar '20

23 Mar '20

On 2020/3/23 9:56, haoxin wrote: > 非常感谢您的回复，谢谢，我还想问下，intel rdt resctrl挂载后下有很多配置文件，例如mon_data下的llc_occupancy、mbm_local_bytes、mbm_total_bytes等，这些是在后续会实现还是不再提供类似文件？ > 近期暂时还没有改动，后续支持鲲鹏930的版本可以考虑。当前如果有场景确实需要，以及有效果的话，也可以考虑提供。 > > > > > > 在 2020-03-23 09:38:58，"Xie XiuQi via Kernel" <kernel(a)openeuler.org> 写道： >> >> >>On 2020/3/23 9:15, haoxin wrote: >>> 您好： >>> 请问目前欧拉这块有关于mpam功能验证的测试方法或者手册吗？ >> >>有一个简单的操作说明，你可以针对场景做一下测试。有问题可以反馈。 >> >>----- >>1 背景 >>MPAM 特性是 ARM v8.4 引入的 Cache QoS, 和内存带宽 QoS 特性. 目前业界与之最接近的是 intel 的 RDT 特性. >>Intel RDT 在 Linux 内核中的使用接口是 resctrl。这是一个基于 kernfs 实现的操作接口。为支持 MPAM 特性, >>我们的目标也是实现类似 intel rdt 的 resctrl 用户接口。 >>社区当前还没有 ARM64 resctrl 接口的实现(arm公司在做, 还没有发开源社区). >> >>2 Quick Start >>Hi620 2P 为例, 其基本情况: >> >>2.1 linux kernel 使能 mpam 特性 >>openEuler 中 mpam 是 preview 特性, 当前版本暂没有商用, 默认没有使能. 如果想在鲲鹏920 2P 板子上验证 mpam 特性, 需要在启动参数中加 mpam 使能. >>openEuler 上使能 mpam, 需要在 /boot/grub2/grub.cfg 或 /boot/efi/EFI/euleros/grub.cfg 中添加 mpam 启动参数. >> >>2.2 挂载 resctrl >>系统启动后, 需要手动 mount resctrl 才能使用. >> >>mount -t resctrl resctrl /sys/fs/resctrl >>cd /sys/fs/resctrl >> >>2.3 配置和使用资源组 >>2.3.1 为 L3 Cache 的 PARTID 1 分配 4 个 Cache way >># 每个目录表示对于的 L3T >>cd /sys/fs/resctrl >> >># 先选择某个 PARTID, 在为其设定 mask, mask 就是对应的 cache way >># 这里选 partid=1, mask=f, 即为 partid 1 分了 0-3 计4条way (共15条way) >>mkdir p1 >>cd p1 >>echo "L3:0=f;1=f;2=f;3=f" > schemata >>cat schemata # 查看设置情况 >>cd .. # 返回上次目录 >> >># 更多的例子 >># partid = 2, N0 (way 5,6), N1 (way 5-8), N2 (way 5,6), N3 (way 5-15) >># mask 16进制 >>mkdir p2 >>cd p2 >>echo "L3:0=30;1=f0;2=30;3=f0" > schemata >>cat schemata # 查看设置情况 >>cd .. # 返回上次目录 >> >>Cache 和内存带宽的 partid 数量不同, 但是 resctrl 接口当前又是Cache和partid同时操作的, 所以当前实现时已最小的为准； >> >>2.3.2 为 Cache/memory bandwidth 设置 monitor, 并观察期使用情况 >>由于 monitor 数量较少, 所以在创建分组的时候没有默认开启, 需要手动开启. >> >># p1 分组已存在, 开启 monitor >>echo 1 > /sys/fs/resctrl/p1/ctrlmon >># 观察该组资源的使用情况 >># L3 Cache 的单位是 Bytes, 表明当前 Cache 被占用这么多; >># Memory Bandwidth 单位是MB/s (架构要求的是 MB/s, 鲲鹏920 看具体实现) >>grep . /sys/fs/resctrl/p1/mon_data/* >> >>2.3.3 为进程/线程分配分组(让进程/线程只使用某个 part 的资源) >># task 19 将使用 partid 1 限定的资源 (pmg 在监控的时候用, pmg 和 partid 都匹配, 才进行统计监控使用情况) >># 将 task 19 move 到 p1 资源组中 >># 新创建的子进程, 将继承父进程的 partid 和 pmg 信息 >># move 进程时, 已创建的子进程不影响 >>echo 19 > /sys/fs/resctrl/p1/tasks >> >># 设置当前 shell 使用那个组的Cache资源 ($$ 表示当前 shell 的 PID) >>echo $$ > /sys/fs/resctrl/p1/tasks >> >># 查看 task 的设置情况 >>cat /sys/fs/resctrl/p1/tasks >> >>2.3.4 为 cpu 分配分组(让指定的 cpu 只使用某个 part 的资源) >>即, 该 cpu 上发出的所有请求都是要改资源组限定的资源(cache, memory bandwidth) >> >># task 1 将使用 partid 2 限定的资源 (pmg 在监控的时候用, pmg 和 partid 都匹配, 才进行统计监控使用情况) >># 将 cpu 1 move 到 p2 资源组中 >>echo 1 > /sys/fs/resctrl/p2/cpus_list >> >># 查看 task 的设置情况 >>cat /sys/fs/resctrl/p2/cpus # 掩码方式显示 >>cat /sys/fs/resctrl/p2/cpus_list # 列表方式显示 >> >>2.4 内存带宽资源划分 >> >>2.4.1 为 PART 1 设置内存带宽的上限 >># PART 1, 最多使用约 50% 的带宽; >># 0,1,2,3 分别表示 4 个 numa node >># 带宽按照百分比进行设置, 最小粒度是 5% 对齐. >> >>echo "MB:0=50;1=50;2=50;3=50" > /sys/fs/resctrl/p1/schemata >> >>2.4.3 分配进程(pid)到资源分组 >>挂载 resctrl >>cache 资源划分 >>设置 monitor >>起测试程序 (假设 lat_mem_rd 程序在 /root 目录下面, 其他随便什么程序都一样) >># 挂载 mpamctrl >>mount -t resctrl resctrl /sys/fs/resctrl >>cd /sys/fs/resctrl >> >># 使用 part 1, 为其分配 4 个way (4 个 node 采用相同的设置) >># partid=1, mask=f >>mkdir p1 >>echo "L3:0=f;1=f;2=f;3=f" > schemata >> >># 使用 monitor 1 来监控 part 1 的 cache 使用情况 >># monitor=1, pmg=1, partid=1 >>echo 1 > p1/ctrlmon >> >># 设置当前 shell 进程使用 partid 1 (task 使用哪个 part, 在子进程创建时会继承父进程的) >># 两个 $$ 代表当前 shell 的pid >>echo $$ > p1/tasks >> >># 在后台跑测试程序, 测试结果记录到 result.log 中 >>cd /root >>/root/lat_mem_rd -P 1 -N 1 512M 64 > result.log 2 > &1 & >> >># lat_mem_rd 测试完成后查看结果. >>如果想再测 8 way 的情况, 则只需改 CPBM 的 mask 即可: >> >>echo "L3:0=ff;1=ff;2=ff;3=ff" > schemata >>测试过程中如果想观察 Cache 的使用情况 >> >>grep . /sys/fs/resctrl/p1/mon_data/L3* >> >>3.2 限制内存带宽的例子 >>步骤: >> >>挂载 resctrl >>限制资源划分 >>设置 monitor >>起测试程序 >>mount -t resctrl resctrl /sys/fs/resctrl >>cd /sys/fs/resctrl >> >># 0/100 表示不限制 >># 其他数值表示最大带宽设置的百分比(硬件限制的粒度是 1/64, 软件上近似对应成百分比, 最小按5%对齐). >>mkdir p1 >>echo "MB:0=30;1=30;2=30;3=30" > p1/schemata >>echo 1 > p1/ctrlmon >> >># 设置当前 shell 进程使用 partid 1 (task 使用哪个 part, 在子进程创建时会继承父进程的) >># 两个 $$ 代表当前 shell 的pid >>echo $$ > /sys/fs/resctrl/p1/tasks >># 在后台跑测试程序, 测试结果记录到 result.log 中 >>cd /root >>/root/bw_mem -P 1 -N 1 512M rd > result.log 2 > &1 & >> >># 观察monitor情况 >>cd /sys/fs/resctrl >># monitor=1 >>grep . /sys/fs/resctrl/p1/mon_data/MB* >> >> >>> >>> 此外目前resctrl挂载后和intel rdt进行了对比，发现很多文件都不存在，例如请问是代码还未完成还是做了简化？ >>> >>> 例如我在info目录下有L3_MON目录，按照intel rdt的处理，应该有下面一些子文件：但是在mpam下面就没有 >>> >>> “num_rmids”: >>> The number of RMIDs available. This is the upper bound for how many “CTRL_MON” + “MON” groups can be created. >>> “mon_features”: >>> Lists the monitoring events if monitoring is enabled for the resource. >>> “max_threshold_occupancy”: >>> Read/write file provides the largest value (in bytes) at which a previously used LLC_occupancy counter can be considered for re-use. >>> >>> >>> >>> >>> >>_______________________________________________ >>Kernel mailing list -- kernel(a)openeuler.org >>To unsubscribe send an email to kernel-leave(a)openeuler.org > > > > >

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Re: openEuler-1.0是否完整支持mpam功能
by Xie XiuQi 23 Mar '20

23 Mar '20

On 2020/3/23 9:15, haoxin wrote: > 您好： > 请问目前欧拉这块有关于mpam功能验证的测试方法或者手册吗？有一个简单的操作说明，你可以针对场景做一下测试。有问题可以反馈。 ----- 1 背景 MPAM 特性是 ARM v8.4 引入的 Cache QoS, 和内存带宽 QoS 特性. 目前业界与之最接近的是 intel 的 RDT 特性. Intel RDT 在 Linux 内核中的使用接口是 resctrl。这是一个基于 kernfs 实现的操作接口。为支持 MPAM 特性, 我们的目标也是实现类似 intel rdt 的 resctrl 用户接口。社区当前还没有 ARM64 resctrl 接口的实现(arm公司在做, 还没有发开源社区). 2 Quick Start Hi620 2P 为例, 其基本情况: 2.1 linux kernel 使能 mpam 特性 openEuler 中 mpam 是 preview 特性, 当前版本暂没有商用, 默认没有使能. 如果想在鲲鹏920 2P 板子上验证 mpam 特性, 需要在启动参数中加 mpam 使能. openEuler 上使能 mpam, 需要在 /boot/grub2/grub.cfg 或 /boot/efi/EFI/euleros/grub.cfg 中添加 mpam 启动参数. 2.2 挂载 resctrl 系统启动后, 需要手动 mount resctrl 才能使用. mount -t resctrl resctrl /sys/fs/resctrl cd /sys/fs/resctrl 2.3 配置和使用资源组 2.3.1 为 L3 Cache 的 PARTID 1 分配 4 个 Cache way # 每个目录表示对于的 L3T cd /sys/fs/resctrl # 先选择某个 PARTID, 在为其设定 mask, mask 就是对应的 cache way # 这里选 partid=1, mask=f, 即为 partid 1 分了 0-3 计4条way (共15条way) mkdir p1 cd p1 echo "L3:0=f;1=f;2=f;3=f" > schemata cat schemata # 查看设置情况 cd .. # 返回上次目录 # 更多的例子 # partid = 2, N0 (way 5,6), N1 (way 5-8), N2 (way 5,6), N3 (way 5-15) # mask 16进制 mkdir p2 cd p2 echo "L3:0=30;1=f0;2=30;3=f0" > schemata cat schemata # 查看设置情况 cd .. # 返回上次目录 Cache 和内存带宽的 partid 数量不同, 但是 resctrl 接口当前又是Cache和partid同时操作的, 所以当前实现时已最小的为准； 2.3.2 为 Cache/memory bandwidth 设置 monitor, 并观察期使用情况由于 monitor 数量较少, 所以在创建分组的时候没有默认开启, 需要手动开启. # p1 分组已存在, 开启 monitor echo 1 > /sys/fs/resctrl/p1/ctrlmon # 观察该组资源的使用情况 # L3 Cache 的单位是 Bytes, 表明当前 Cache 被占用这么多; # Memory Bandwidth 单位是MB/s (架构要求的是 MB/s, 鲲鹏920 看具体实现) grep . /sys/fs/resctrl/p1/mon_data/* 2.3.3 为进程/线程分配分组(让进程/线程只使用某个 part 的资源) # task 19 将使用 partid 1 限定的资源 (pmg 在监控的时候用, pmg 和 partid 都匹配, 才进行统计监控使用情况) # 将 task 19 move 到 p1 资源组中 # 新创建的子进程, 将继承父进程的 partid 和 pmg 信息 # move 进程时, 已创建的子进程不影响 echo 19 > /sys/fs/resctrl/p1/tasks # 设置当前 shell 使用那个组的Cache资源 ($$ 表示当前 shell 的 PID) echo $$ > /sys/fs/resctrl/p1/tasks # 查看 task 的设置情况 cat /sys/fs/resctrl/p1/tasks 2.3.4 为 cpu 分配分组(让指定的 cpu 只使用某个 part 的资源) 即, 该 cpu 上发出的所有请求都是要改资源组限定的资源(cache, memory bandwidth) # task 1 将使用 partid 2 限定的资源 (pmg 在监控的时候用, pmg 和 partid 都匹配, 才进行统计监控使用情况) # 将 cpu 1 move 到 p2 资源组中 echo 1 > /sys/fs/resctrl/p2/cpus_list # 查看 task 的设置情况 cat /sys/fs/resctrl/p2/cpus # 掩码方式显示 cat /sys/fs/resctrl/p2/cpus_list # 列表方式显示 2.4 内存带宽资源划分 2.4.1 为 PART 1 设置内存带宽的上限 # PART 1, 最多使用约 50% 的带宽; # 0,1,2,3 分别表示 4 个 numa node # 带宽按照百分比进行设置, 最小粒度是 5% 对齐. echo "MB:0=50;1=50;2=50;3=50" > /sys/fs/resctrl/p1/schemata 2.4.3 分配进程(pid)到资源分组挂载 resctrl cache 资源划分设置 monitor 起测试程序 (假设 lat_mem_rd 程序在 /root 目录下面, 其他随便什么程序都一样) # 挂载 mpamctrl mount -t resctrl resctrl /sys/fs/resctrl cd /sys/fs/resctrl # 使用 part 1, 为其分配 4 个way (4 个 node 采用相同的设置) # partid=1, mask=f mkdir p1 echo "L3:0=f;1=f;2=f;3=f" > schemata # 使用 monitor 1 来监控 part 1 的 cache 使用情况 # monitor=1, pmg=1, partid=1 echo 1 > p1/ctrlmon # 设置当前 shell 进程使用 partid 1 (task 使用哪个 part, 在子进程创建时会继承父进程的) # 两个 $$ 代表当前 shell 的pid echo $$ > p1/tasks # 在后台跑测试程序, 测试结果记录到 result.log 中 cd /root /root/lat_mem_rd -P 1 -N 1 512M 64 > result.log 2 > &1 & # lat_mem_rd 测试完成后查看结果. 如果想再测 8 way 的情况, 则只需改 CPBM 的 mask 即可: echo "L3:0=ff;1=ff;2=ff;3=ff" > schemata 测试过程中如果想观察 Cache 的使用情况 grep . /sys/fs/resctrl/p1/mon_data/L3* 3.2 限制内存带宽的例子步骤: 挂载 resctrl 限制资源划分设置 monitor 起测试程序 mount -t resctrl resctrl /sys/fs/resctrl cd /sys/fs/resctrl # 0/100 表示不限制 # 其他数值表示最大带宽设置的百分比(硬件限制的粒度是 1/64, 软件上近似对应成百分比, 最小按5%对齐). mkdir p1 echo "MB:0=30;1=30;2=30;3=30" > p1/schemata echo 1 > p1/ctrlmon # 设置当前 shell 进程使用 partid 1 (task 使用哪个 part, 在子进程创建时会继承父进程的) # 两个 $$ 代表当前 shell 的pid echo $$ > /sys/fs/resctrl/p1/tasks # 在后台跑测试程序, 测试结果记录到 result.log 中 cd /root /root/bw_mem -P 1 -N 1 512M rd > result.log 2 > &1 & # 观察monitor情况 cd /sys/fs/resctrl # monitor=1 grep . /sys/fs/resctrl/p1/mon_data/MB* > > 此外目前resctrl挂载后和intel rdt进行了对比，发现很多文件都不存在，例如请问是代码还未完成还是做了简化？ > > 例如我在info目录下有L3_MON目录，按照intel rdt的处理，应该有下面一些子文件：但是在mpam下面就没有 > > “num_rmids”: > The number of RMIDs available. This is the upper bound for how many “CTRL_MON” + “MON” groups can be created. > “mon_features”: > Lists the monitoring events if monitoring is enabled for the resource. > “max_threshold_occupancy”: > Read/write file provides the largest value (in bytes) at which a previously used LLC_occupancy counter can be considered for re-use. > > > > >

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[PATCH 0/2] update openeuler_defconfig
by Yang Yingliang 21 Mar '20

21 Mar '20

Xie XiuQi (1): x86/config: enable CONFIG_CFQ_GROUP_IOSCHED Xiongfeng Wang (1): x86/openeuler_config: disable CONFIG_EFI_VARS arch/x86/configs/openeuler_defconfig | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) -- 1.8.3

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[PATCH] btrfs: don't use WARN_ON when ret is -ENOTENT in __btrfs_free_extent()
by Yang Yingliang 20 Mar '20

20 Mar '20

hulk inclusion category: bugfix bugzilla: 13690 CVE: CVE-2019-19039 ------------------------------------------------- Avoid register messages when ret is -ENOTENT. Signed-off-by: Yang Yingliang <yangyingliang(a)huawei.com> --- fs/btrfs/extent-tree.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index 47ca1eb..4bf9318 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -6793,7 +6793,7 @@ static int __btrfs_free_extent(struct btrfs_trans_handle *trans, } extent_slot = path->slots[0]; } - } else if (WARN_ON(ret == -ENOENT)) { + } else if (ret == -ENOENT) { btrfs_print_leaf(path->nodes[0]); btrfs_err(info, "unable to find ref byte nr %llu parent %llu root %llu owner %llu offset %llu", -- 1.8.3

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[PATCH v2] cifs: fix panic in smb2_reconnect
by Yang Yingliang 20 Mar '20

20 Mar '20

From: Ronnie Sahlberg <lsahlber(a)redhat.com> mainline inclusion from mainline-5.2-rc6 commit 0ff2b018b02f category: bugfix bugzilla: 16811 CVE: NA https://gitee.com/src-openeuler/cifs-utils/issues/I1C1QY?from=project-issue ------------------------------------------------- RH Bugzilla: 1702264 We need to protect so that the call to smb2_reconnect() in smb2_reconnect_server() does not end up freeing the session because it can lead to a use after free and crash. Reviewed-by: Aurelien Aptel <aaptel(a)suse.com> Cc: <stable(a)vger.kernel.org> Signed-off-by: Ronnie Sahlberg <lsahlber(a)redhat.com> Signed-off-by: Steve French <stfrench(a)microsoft.com> Reviewed-by: Pavel Shilovsky <pshilov(a)microsoft.com> Conflicts: fs/cifs/cifsproto.h fs/cifs/connect.c [yyl: make cifs_put_smb_ses() extern] --- fs/cifs/cifsproto.h | 2 ++ fs/cifs/connect.c | 3 +-- fs/cifs/smb2pdu.c | 10 +++++++++- 3 files changed, 12 insertions(+), 3 deletions(-) diff --git a/fs/cifs/cifsproto.h b/fs/cifs/cifsproto.h index d7ac75e..bd97f2a 100644 --- a/fs/cifs/cifsproto.h +++ b/fs/cifs/cifsproto.h @@ -526,6 +526,8 @@ extern int E_md4hash(const unsigned char *passwd, unsigned char *p16, extern int SMBencrypt(unsigned char *passwd, const unsigned char *c8, unsigned char *p24); +extern void cifs_put_smb_ses(struct cifs_ses *ses); + void cifs_readdata_release(struct kref *refcount); int cifs_async_readv(struct cifs_readdata *rdata); int cifs_readv_receive(struct TCP_Server_Info *server, struct mid_q_entry *mid); diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c index 975f800..f031420 100644 --- a/fs/cifs/connect.c +++ b/fs/cifs/connect.c @@ -2733,8 +2733,7 @@ static int match_session(struct cifs_ses *ses, struct smb_vol *vol) return NULL; } -static void -cifs_put_smb_ses(struct cifs_ses *ses) +void cifs_put_smb_ses(struct cifs_ses *ses) { unsigned int rc, xid; struct TCP_Server_Info *server = ses->server; diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c index 99efb2b..76dfb4f 100644 --- a/fs/cifs/smb2pdu.c +++ b/fs/cifs/smb2pdu.c @@ -2920,9 +2920,14 @@ void smb2_reconnect_server(struct work_struct *work) tcon_exist = true; } } + /* + * IPC has the same lifetime as its session and uses its + * refcount. + */ if (ses->tcon_ipc && ses->tcon_ipc->need_reconnect) { list_add_tail(&ses->tcon_ipc->rlist, &tmp_list); tcon_exist = true; + ses->ses_count++; } } /* @@ -2941,7 +2946,10 @@ void smb2_reconnect_server(struct work_struct *work) else resched = true; list_del_init(&tcon->rlist); - cifs_put_tcon(tcon); + if (tcon->ipc) + cifs_put_smb_ses(tcon->ses); + else + cifs_put_tcon(tcon); } cifs_dbg(FYI, "Reconnecting tcons finished\n"); -- 1.8.3

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[PATCH] fs/cifs: cifs fix panic in smb2_reconnect
by linfeilong 19 Mar '20

19 Mar '20

From: Ronnie Sahlberg <lsahlber(a)redhat.com> mainline inclusion from mainline-v5.1-rc1 commit 0ff2b018b02f89da26a616e0148582321a00fd99 category: bugfix bugzilla: 1702264 CVE: NA ------------------------------------------------- We need to protect so that the call to smb2_reconnect() in smb2_reconnect_server() does not end up freeing the session because it can lead to a use after free and crash. [ 397.787693] CIFS VFS: cifs_mount failed w/return code = -2 [ 403.671998] BUG: unable to handle kernel NULL pointer dereference at 0000000000000000 [ 403.672065] PGD 0 P4D 0 [ 403.672087] Oops: 0000 [#1] SMP PTI [ 403.672114] CPU: 3 PID: 47 Comm: kworker/3:1 Kdump: loaded Not tainted 4.19.90-2003.1.1.0033.oe1.x86_64 #1 [ 403.672173] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.10.2-0-g5f4c7b1-20181220_000000-szxrtosci10000 04/01/2014 [ 403.673038] Workqueue: cifsiod smb2_reconnect_server [cifs] [ 403.673746] RIP: 0010:__list_del_entry_valid+0x25/0x90 [ 403.674448] Code: c3 0f 1f 40 00 48 8b 07 48 b9 00 01 00 00 00 00 ad de 48 8b 57 08 48 39 c8 74 26 48 b9 00 02 00 00 00 00 ad de 48 39 ca 74 2e <48> 8b 32 48 39 fe 75 3a 48 8b 50 08 48 39 f2 75 48 b8 01 00 00 00 [ 403.675955] RSP: 0018:ffffbd48007c3e18 EFLAGS: 00010207 [ 403.676696] RAX: 0000000000000000 RBX: ffffbd48007c3e50 RCX: dead000000000200 [ 403.677447] RDX: 0000000000000000 RSI: 0000000000000206 RDI: ffff9bee27f65818 [ 403.678214] RBP: ffffbd48007c3e38 R08: ffff9bee3bba3038 R09: 00000000000002c2 [ 403.679001] R10: ffffbd48006a3d90 R11: 0000000000000000 R12: ffff9bee27f66818 [ 403.679811] R13: 0000000000000001 R14: ffff9bee27f65800 R15: ffff9bee27f65818 [ 403.680639] FS: 0000000000000000(0000) GS:ffff9bee3bb80000(0000) knlGS:0000000000000000 [ 403.681505] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 403.682391] CR2: 0000000000000000 CR3: 000000003040a005 CR4: 00000000003606e0 [ 403.683315] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 403.684247] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 403.685181] Call Trace: [ 403.686141] smb2_reconnect_server+0x17a/0x340 [cifs] [ 403.687118] process_one_work+0x195/0x3d0 [ 403.688102] worker_thread+0x30/0x390 [ 403.689096] ? process_one_work+0x3d0/0x3d0 [ 403.690111] kthread+0x113/0x130 [ 403.691132] ? kthread_create_worker_on_cpu+0x70/0x70 [ 403.692181] ret_from_fork+0x35/0x40 Reviewed-by: Aurelien Aptel <aaptel(a)suse.com> Cc: <stable(a)vger.kernel.org> Signed-off-by: Ronnie Sahlberg <lsahlber(a)redhat.com> Signed-off-by: Steve French <stfrench(a)microsoft.com> Reviewed-by: Pavel Shilovsky <pshilov(a)microsoft.com> Signed-off-by: Feilong Lin <linfeilong(a)huawei.com> --- fs/cifs/cifsproto.h | 2 ++ fs/cifs/connect.c | 3 +-- fs/cifs/smb2pdu.c | 10 +++++++++- 3 files changed, 12 insertions(+), 3 deletions(-) diff --git a/fs/cifs/cifsproto.h b/fs/cifs/cifsproto.h index d7ac75e..bd97f2a 100644 --- a/fs/cifs/cifsproto.h +++ b/fs/cifs/cifsproto.h @@ -526,6 +526,8 @@ extern int E_md4hash(const unsigned char *passwd, unsigned char *p16, extern int SMBencrypt(unsigned char *passwd, const unsigned char *c8, unsigned char *p24); +extern void cifs_put_smb_ses(struct cifs_ses *ses); + void cifs_readdata_release(struct kref *refcount); int cifs_async_readv(struct cifs_readdata *rdata); int cifs_readv_receive(struct TCP_Server_Info *server, struct mid_q_entry *mid); diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c index 7e85070..2e46a8a 100644 --- a/fs/cifs/connect.c +++ b/fs/cifs/connect.c @@ -2732,8 +2732,7 @@ cifs_find_smb_ses(struct TCP_Server_Info *server, struct smb_vol *vol) return NULL; } -static void -cifs_put_smb_ses(struct cifs_ses *ses) +void cifs_put_smb_ses(struct cifs_ses *ses) { unsigned int rc, xid; struct TCP_Server_Info *server = ses->server; diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c index 30417d4..97995b2 100644 --- a/fs/cifs/smb2pdu.c +++ b/fs/cifs/smb2pdu.c @@ -2914,9 +2914,14 @@ void smb2_reconnect_server(struct work_struct *work) tcon_exist = true; } } + /* + * IPC has the same lifetime as its session and uses its + * refcount. + */ if (ses->tcon_ipc && ses->tcon_ipc->need_reconnect) { list_add_tail(&ses->tcon_ipc->rlist, &tmp_list); tcon_exist = true; + ses->ses_count++; } } /* @@ -2935,7 +2940,10 @@ void smb2_reconnect_server(struct work_struct *work) else resched = true; list_del_init(&tcon->rlist); - cifs_put_tcon(tcon); + if (tcon->ipc) + cifs_put_smb_ses(tcon->ses); + else + cifs_put_tcon(tcon); } cifs_dbg(FYI, "Reconnecting tcons finished\n"); -- 1.8.3.1

1 0

[PATCH 1/2] xfs: always init fdblocks in mount
by Yang Yingliang 18 Mar '20

18 Mar '20

From: Zheng Bin <zhengbin13(a)huawei.com> hulk inclusion category: bugfix bugzilla: 31088 CVE: NA --------------------------- Use fuzz(hydra) to test XFS and automatically generate tmp.img(XFS v5 format, but some metadata is wrong) xfs_repair information(just one AG): agf_freeblks 0, counted 3224 in ag 0 agf_longest 0, counted 3224 in ag 0 sb_fdblocks 3228, counted 3224 Test as follows: mount tmp.img tmpdir cp file1M tmpdir sync In 4.19-stable, sync will stuck, while in linux-next, sync not stuck. The reason is same to commit d0c7feaf8767 ("xfs: add agf freeblocks verify in xfs_agf_verify"), cause agf_longest is 0, we can not block this in xfs_agf_verify. Make sure fdblocks is always inited in mount(also init ifree, icount). xfs_mountfs xfs_check_summary_counts xfs_initialize_perag_data Signed-off-by: Zheng Bin <zhengbin13(a)huawei.com> Reviewed-by: Hou Tao <houtao1(a)huawei.com> Signed-off-by: Yang Yingliang <yangyingliang(a)huawei.com> --- fs/xfs/libxfs/xfs_ag_resv.c | 11 +++++++---- fs/xfs/xfs_mount.c | 33 --------------------------------- 2 files changed, 7 insertions(+), 37 deletions(-) diff --git a/fs/xfs/libxfs/xfs_ag_resv.c b/fs/xfs/libxfs/xfs_ag_resv.c index e2ba2a3..4f099fc 100644 --- a/fs/xfs/libxfs/xfs_ag_resv.c +++ b/fs/xfs/libxfs/xfs_ag_resv.c @@ -309,10 +309,13 @@ } #ifdef DEBUG - /* need to read in the AGF for the ASSERT below to work */ - error = xfs_alloc_pagf_init(pag->pag_mount, tp, pag->pag_agno, 0); - if (error) - return error; + if (!pag->pagf_init) { + /* need to read in the AGF for the ASSERT below to work */ + error = xfs_alloc_pagf_init(pag->pag_mount, tp, + pag->pag_agno, 0); + if (error) + return error; + } ASSERT(xfs_perag_resv(pag, XFS_AG_RESV_METADATA)->ar_reserved + xfs_perag_resv(pag, XFS_AG_RESV_RMAPBT)->ar_reserved <= diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c index 02d1509..3af91e2 100644 --- a/fs/xfs/xfs_mount.c +++ b/fs/xfs/xfs_mount.c @@ -624,39 +624,6 @@ return -EFSCORRUPTED; } - /* - * Now the log is mounted, we know if it was an unclean shutdown or - * not. If it was, with the first phase of recovery has completed, we - * have consistent AG blocks on disk. We have not recovered EFIs yet, - * but they are recovered transactionally in the second recovery phase - * later. - * - * If the log was clean when we mounted, we can check the summary - * counters. If any of them are obviously incorrect, we can recompute - * them from the AGF headers in the next step. - */ - if (XFS_LAST_UNMOUNT_WAS_CLEAN(mp) && - (mp->m_sb.sb_fdblocks > mp->m_sb.sb_dblocks || - !xfs_verify_icount(mp, mp->m_sb.sb_icount) || - mp->m_sb.sb_ifree > mp->m_sb.sb_icount)) - mp->m_flags |= XFS_MOUNT_BAD_SUMMARY; - - /* - * We can safely re-initialise incore superblock counters from the - * per-ag data. These may not be correct if the filesystem was not - * cleanly unmounted, so we waited for recovery to finish before doing - * this. - * - * If the filesystem was cleanly unmounted or the previous check did - * not flag anything weird, then we can trust the values in the - * superblock to be correct and we don't need to do anything here. - * Otherwise, recalculate the summary counters. - */ - if ((!xfs_sb_version_haslazysbcount(&mp->m_sb) || - XFS_LAST_UNMOUNT_WAS_CLEAN(mp)) && - !(mp->m_flags & XFS_MOUNT_BAD_SUMMARY)) - return 0; - return xfs_initialize_perag_data(mp, mp->m_sb.sb_agcount); } -- 1.8.3

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