On Tue, Oct 04, 2022 at 12:18:05PM +0530, Naresh Kamboju wrote:
On Mon, 3 Oct 2022 at 12:43, Greg Kroah-Hartman gregkh@linuxfoundation.org wrote:
This is the start of the stable review cycle for the 5.19.13 release. There are 101 patches in this series, all will be posted as a response to this one. If anyone has any issues with these being applied, please let me know.
Responses should be made by Wed, 05 Oct 2022 07:07:06 +0000. Anything received after that time might be too late.
The whole patch series can be found in one patch at: https://www.kernel.org/pub/linux/kernel/v5.x/stable-review/patch-5.19.13-rc1... or in the git tree and branch at: git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-5.19.y and the diffstat can be found below.
thanks,
greg k-h
Results from Linaro's test farm. No regressions on arm64, arm, x86_64, and i386.
Tested-by: Linux Kernel Functional Testing lkft@linaro.org
NOTE:
- Build warning
- Boot warning on qemu-arm64 with KASAN and Kunit test Suspecting one of the recently commits causing this warning and need to bisect to confirm the commit id. mm/slab_common: fix possible double free of kmem_cache
[ Upstream commit d71608a877362becdc94191f190902fac1e64d35 ]
Hi Naresh Kamboju,
Thanks for the report!
Could you try reverting the commit and re-test it to confirm?
Also could you provide the kernel dmesg of the failure and the kernel config of the test?
I locally pulled the linux-stable source and used QEMU to test it with kasan/kfence enabled, but could not reproduce it (I only have x86 HW at hand).
- Following kernel boot warning noticed on qemu-arm64 with KASAN and
KUNIT enabled [1]
[ 177.651182] ------------[ cut here ]------------ [ 177.652217] kmem_cache_destroy test: Slab cache still hasobjects when called from test_exit+0x28/0x40 [ 177.654849] WARNING: CPU: 0 PID: 1 at mm/slab_common.c:520 kmem_cache_destroy+0x1e8/0x20c [ 177.666237] Modules linked in: [ 177.667325] CPU: 0 PID: 1 Comm: swapper/0 Tainted: G B 5.19.13-rc1 #1 [ 177.668666] Hardware name: linux,dummy-virt (DT) [ 177.669783] pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) [ 177.671120] pc : kmem_cache_destroy+0x1e8/0x20c [ 177.672217] lr : kmem_cache_destroy+0x1e8/0x20c [ 177.691598] Call trace: [ 177.692165] kmem_cache_destroy+0x1e8/0x20c [ 177.693196] test_exit+0x28/0x40 [ 177.694158] kunit_catch_run_case+0x5c/0x120 [ 177.695177] kunit_try_catch_run+0x144/0x26c [ 177.696211] kunit_run_case_catch_errors+0x158/0x1e0 [ 177.697353] kunit_run_tests+0x374/0x750 [ 177.698333] __kunit_test_suites_init+0x74/0xa0 [ 177.699386] kunit_run_all_tests+0x160/0x380 [ 177.700428] kernel_init_freeable+0x32c/0x388 [ 177.701497] kernel_init+0x2c/0x150 [ 177.702347] ret_from_fork+0x10/0x20 [ 177.703308] ---[ end trace 0000000000000000 ]---
[1] https://tuxapi.tuxsuite.com/v1/groups/linaro/projects/lkft/tests/2FcCyacq1Su...
I also tried the reproduce cmmand from the above link:
tuxrun --runtime podman --device qemu-arm64 --kernel https://builds.tuxbuild.com/2FcCwzbNgR7TlQXzJ0nu32y1CpB/Image.gz --modules https://builds.tuxbuild.com/2FcCwzbNgR7TlQXzJ0nu32y1CpB/modules.tar.xz --rootfs https://storage.lkft.org/rootfs/oe-kirkstone/20220824-114729/juno/lkft-tux-i... --parameters SKIPFILE=skipfile-lkft.yaml --image docker.io/lavasoftware/lava-dispatcher:2022.06 --tests kunit --timeouts boot=30
Which also didn't reproduce it, but had some RCU stall problems (could also be related to the x86 HWs)
[ 321.006279] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: [ 321.007281] ffff0000074c2300: 00 07 fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 321.009283] rcu: 0-...0: (1 GPs behind) idle=40f/1/0x4000000000000000 softirq=436/437 fqs=5
[ 321.024995] rcu: rcu_preempt kthread timer wakeup didn't happen for 4464 jiffies! g-207 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 [ 321.026343] rcu: Possible timer handling issue on cpu=1 timer-softirq=1426 [ 321.027340] rcu: rcu_preempt kthread starved for 4465 jiffies! g-207 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=1 [ 321.028517] rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior. [ 321.029488] rcu: RCU grace-period kthread stack dump: [ 321.030251] task:rcu_preempt state:I stack: 0 pid: 16 ppid: 2 flags:0x00000008 [ 321.031434] Call trace: [ 321.031878] __switch_to+0x140/0x1e0 [ 321.032565] __schedule+0x4f4/0xc74 [ 321.033228] schedule+0x88/0x13c [ 321.033915] schedule_timeout+0x104/0x2b0 [ 321.034646] rcu_gp_fqs_loop+0x1a0/0x784 [ 321.035119] rcu_gp_kthread+0x278/0x3a0 [ 321.035608] kthread+0x160/0x170 [ 339.882465] ret_from_fork+0x10/0x20 [ 339.883898] rcu: Stack dump where RCU GP kthread last ran:
The full .xz log is attched.
Thanks, Feng