Re: 💥 PANICKED: Test report for kernel 5.7.9-rc1-c2fb28a.cki (stable)

On Wed, Jul 15, 2020 at 09:36:44AM -0400, Veronika Kabatova wrote:

----- Original Message -----

...

From: "CKI Project" cki-project@redhat.com To: "Linux Stable maillist" stable@vger.kernel.org Cc: "Xiong Zhou" xzhou@redhat.com Sent: Wednesday, July 15, 2020 3:33:45 PM Subject: 💥 PANICKED: Test report for kernel 5.7.9-rc1-c2fb28a.cki (stable)

Hello,

We ran automated tests on a recent commit from this kernel tree:

   Kernel repo:
   https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git
        Commit: c2fb28a4b6e4 - Linux 5.7.9-rc1

The results of these automated tests are provided below.

Overall result: FAILED (see details below)
         Merge: OK
       Compile: OK
         Tests: PANICKED

All kernel binaries, config files, and logs are available for download here:

https://cki-artifacts.s3.us-east-2.amazonaws.com/index.html?prefix=datawareh...

One or more kernel tests failed:

s390x:
 ❌ Boot test
 ❌ Boot test
 💥 Boot test

Hi,

we started observing boot panics with 5.7 on s390x yesterday:

[ 0.388965] Kernel panic - not syncing: Corrupted kernel text [ 0.388970] CPU: 0 PID: 5 Comm: kworker/0:0 Not tainted 5.7.8-0930ce5.cki #1 [ 0.388971] Hardware name: IBM 2964 N96 400 (z/VM 6.4.0) [ 0.388975] Workqueue: events timer_update_keys [ 0.388977] Call Trace: [ 0.388980] [<00000001378c868a>] show_stack+0x8a/0xd0 [ 0.388983] [<0000000137e0c9c2>] dump_stack+0x8a/0xb8 [ 0.388985] [<00000001378fa372>] panic+0x112/0x308 [ 0.388989] [<00000001378d20b6>] jump_label_bug+0x7e/0x80 [ 0.388990] [<00000001378d1fb8>] __jump_label_transform+0xa8/0xd8 [ 0.388992] [<00000001378d200e>] arch_jump_label_transform+0x26/0x40 [ 0.388995] [<0000000137a8d448>] __jump_label_update+0xb8/0x128 [ 0.388996] [<0000000137a8dca6>] static_key_enable_cpuslocked+0x8e/0xd0 [ 0.388998] [<0000000137a8dd18>] static_key_enable+0x30/0x40 [ 0.389000] [<000000013798a0d2>] timer_update_keys+0x3a/0x50 [ 0.389003] [<000000013791cdde>] process_one_work+0x206/0x458 [ 0.389005] [<000000013791d078>] worker_thread+0x48/0x460 [ 0.389007] [<0000000137924912>] kthread+0x12a/0x160 [ 0.389013] [<00000001381b9a70>] ret_from_fork+0x2c/0x30

I only released one of the reports to not spam too much but the panics are still happening with the most recent code.

These panics are NOT present on the current mainline. All other arches are OK.

Given the call trace, I'm guessing it is something related to

https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git/c...

Indeed, looks like we were missing d6df52e9996d ("s390/maccess: add no DAT mode to kernel_write").

I also took cb2cceaefb4c ("s390: Change s390_kernel_write() return type to match memcpy()") as a dependency.

Thank you!