lkml.org 
[lkml]   [2016]   [Nov]   [24]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: next: s390 crash due to 's390: move sys_call_table and last_break from thread_info to thread_struct'
From
Date
Martin,

On 11/15/2016 07:54 AM, Martin Schwidefsky wrote:
> On Tue, 15 Nov 2016 07:35:54 -0800
> Guenter Roeck <linux@roeck-us.net> wrote:
>
>> Hi Martin,
>>
>> my s390 qemu boot test crashes in -next as follows.
>>
>> Kernel stack overflow.
>> CPU: 0 PID: 923 Comm: modprobe Not tainted 4.9.0-rc5-next-20161115 #1
>> Hardware name: QEMU QEMU QEMU (KVM)
>> task: 000000001d805100 task.stack: 000000001d898000
>> Krnl PSW : 0404e00180000000 0000000000ac2b42 (pgm_check_handler+0xd6/0x1b4)
>> R:0 T:1 IO:0 EX:0 Key:0 M:1 W:0 P:0 AS:3 CC:2 PM:0 RI:0 EA:3
>> Krnl GPRS: 0000000000000020 0000000000000000 0000000000000004 0000000000000000
>> 0000000000400034 0000000000000000 000000007ff3b350 0000000000000001
>> 0404e00180000000 0000000000ac2b42 0000000000ac2ad0 000000007ff38178
>> 000000001d805100 0000000000ac335e 0000000000000200 000000007ff380d8
>> Krnl Code: 0000000000ac2b34: a7840005 brc 8,ac2b3e
>> 0000000000ac2b38: d2ffe0e8d000 mvc 232(256,%r14),0(%r13)
>> #0000000000ac2b3e: 41b0f0a0 la %r11,160(%r15)
>> >0000000000ac2b42: eb07b0180024 stmg %r0,%r7,24(%r11)
>> 0000000000ac2b48: d23fb0580200 mvc 88(64,%r11),512
>> 0000000000ac2b4e: eb89b0080024 stmg %r8,%r9,8(%r11)
>> 0000000000ac2b54: d203b0a0008c mvc 160(4,%r11),140
>> 0000000000ac2b5a: d207b0a800a8 mvc 168(8,%r11),168
>> Call Trace:
>> no locks held by modprobe/923.
>> Last Breaking-Event-Address:
>> [<0000000000000000>] (null)
>> Kernel panic - not syncing: Corrupt kernel stack, can't continue.
>>
>> Bisect points to commit 1914608db9 ("s390: move sys_call_table and last_break
>> from thread_info to thread_struct"). Reverting that patch fixes the problem.
>>
>> Configuration is s390:defconfig with CONFIG_MARCH_Z900=y.
>>
>> Bisect log is attached.
>> A complete log is at:
>> http://kerneltests.org/builders/qemu-s390-next/builds/252/steps/qemubuildcommand/logs/stdio
>
> Thanks for the report. Builds for Z900 and Z990 are borked. This hunk
>
> @@ -287,7 +292,13 @@ ENTRY(system_call)
> mvc __PT_INT_CODE(4,%r11),__LC_SVC_ILC
> stg %r14,__PT_FLAGS(%r11)
> .Lsysc_do_svc:
> - lg %r10,__TI_sysc_table(%r12) # address of system call table
> + # load address of system call table
> +#ifdef CONFIG_HAVE_MARCH_Z990_FEATURES
> + lg %r10,__TASK_thread+__THREAD_sysc_table(%r12)
> +#else
> + lghi %r10,__TASK_thread
> + lg %r10,__THREAD_sysc_table(%r10,%r12)
> +#endif
> llgh %r8,__PT_INT_CODE+2(%r11)
> slag %r8,%r8,2 # shift and test for svc 0
> jnz .Lsysc_nr_ok
>
> makes ill use of %r10 in the #else part. Should be fixed now and tomorrows -next
> tree will have the fix. Thanks again.
>

This is still crashing in -next with exactly the same message.

Guenter

\
 
 \ /
  Last update: 2016-11-24 21:54    [W:0.062 / U:0.896 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site