Comment # 15
on bug 1202727
from Petr Tesa������������k
For reference, this is how the kexec attempt fails:
[ 9.625911][ T119] Unable to handle kernel pointer dereference in virtual
kernel address space
[ 9.626024][ T119] Failing address: 6f2abf8710e68000 TEID: 6f2abf8710e68803
[ 9.626075][ T119] Fault in home space mode while using kernel ASCE.
[ 9.626294][ T119] AS:0000000001828007 R3:0000000000000024
[ 9.626617][ T119] Oops: 0038 ilc:3 [#1] SMP
[ 9.626770][ T119] Modules linked in:
[ 9.626968][ T119] CPU: 0 PID: 119 Comm: systemd-gpt-aut Not tainted
6.0.0-rc6-1.g2132e28-default #1 openSUSE Tumbleweed (unreleased)
23ff4c3ab0b429314c21910f4f8cb21b0ff3e788
[ 9.627130][ T119] Hardware name: QEMU 2964 QEMU (KVM/Linux)
[ 9.627244][ T119] Krnl PSW : 0404e00180000000 000000000040e320
(__mod_memcg_lruvec_state+0x30/0xe0)
[ 9.627583][ T119] 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
[ 9.627805][ T119] Krnl GPRS: 0000000000000001 0000000000000130
0000000002ec5a40 0000000000000130
[ 9.627862][ T119] 0000000000000001 6f2abf8710e67235
0000000000000000 0000000008100073
[ 9.627913][ T119] 0700000002f3a200 000000000038d360
00000372000ba6c0 0000000000000001
[ 9.627963][ T119] 0000000002f3a200 0000000000000000
00000380001836e8 00000380001836b8
[ 9.628697][ T119] Krnl Code: 000000000040e312: b90400b4 lgr
%r11,%r4
[ 9.628697][ T119] 000000000040e316: eb330003000d sllg
%r3,%r3,3
[ 9.628697][ T119] #000000000040e31c: b9040013 lgr
%r1,%r3
[ 9.628697][ T119] >000000000040e320: e31050100108 ag
%r1,4112(%r5)
[ 9.628697][ T119] 000000000040e326: e31003b80008 ag
%r1,952
[ 9.628697][ T119] 000000000040e32c: e34010000008 ag
%r4,0(%r1)
[ 9.628697][ T119] 000000000040e332: e34010000024 stg
%r4,0(%r1)
[ 9.628697][ T119] 000000000040e338: e33020900008 ag
%r3,144(%r2)
[ 9.629286][ T119] Call Trace:
[ 9.629710][ T119] [<000000000040e320>] __mod_memcg_lruvec_state+0x30/0xe0
[ 9.629940][ T119] [<000000000040f4c2>] __mod_lruvec_page_state+0xa2/0xe0
[ 9.629997][ T119] [<000000000012fcaa>] page_table_alloc+0x16a/0x290
[ 9.630051][ T119] [<000000000038d360>] __do_fault+0x80/0xf0
[ 9.630099][ T119] [<000000000039369c>] __handle_mm_fault+0xcfc/0x1240
[ 9.630157][ T119] [<0000000000393cae>] handle_mm_fault+0xce/0x220
[ 9.630199][ T119] [<0000000000129508>] do_exception+0x1d8/0x4d0
[ 9.630549][ T119] [<0000000000129e2a>] do_dat_exception+0x2a/0x50
[ 9.630672][ T119] [<0000000000a5ab54>] __do_pgm_check+0xf4/0x1b0
[ 9.630805][ T119] [<0000000000a6b64c>] pgm_check_handler+0x11c/0x170
[ 9.630868][ T119] [<00000000006faee4>] __clear_user+0x24/0x70
[ 9.630953][ T119] ([<00000000004b85c8>] load_elf_binary+0xc18/0x1a10)
[ 9.631022][ T119] [<00000000004341b0>] bprm_execve+0x2a0/0x640
[ 9.631074][ T119] [<000000000043474e>]
do_execveat_common.isra.0+0x1fe/0x270
[ 9.631125][ T119] [<0000000000434a7e>] __s390x_sys_execve+0x5e/0x70
[ 9.631175][ T119] [<0000000000a5ade4>] __do_syscall+0x1d4/0x200
[ 9.631224][ T119] [<0000000000a6b4c2>] system_call+0x82/0xb0
[ 9.631303][ T119] Last Breaking-Event-Address:
[ 9.631343][ T119] [<000000000040f40c>] __mod_lruvec_state+0x4c/0x60
[ 9.632144][ T119] ---[ end trace 0000000000000000 ]---
[ 9.736079][ T116] Unable to handle kernel pointer dereference in virtual
kernel address space
[ 9.736181][ T116] Failing address: 0000000000000000 TEID: 0000000000000483
[ 9.736218][ T116] Fault in home space mode while using kernel ASCE.
[ 9.736296][ T116] AS:0000000001828007 R3:000000007ffec007
S:000000007fff1800 P:000000000000003d
[ 9.736473][ T116] Oops: 0004 ilc:3 [#2] SMP
[ 9.736539][ T116] Modules linked in:
[ 9.736632][ T116] CPU: 0 PID: 116 Comm: dracut-rootfs-g Tainted: G D
6.0.0-rc6-1.g2132e28-default #1 openSUSE Tumbleweed (unreleased)
23ff4c3ab0b429314c21910f4f8cb21b0ff3e788
[ 9.736696][ T116] Hardware name: QEMU 2964 QEMU (KVM/Linux)
[ 9.736726][ T116] Krnl PSW : 0404d00180000000 000000000040f4f2
(__mod_lruvec_page_state+0xd2/0xe0)
[ 9.736809][ T116] R:0 T:1 IO:0 EX:0 Key:0 M:1 W:0 P:0 AS:3 CC:1
PM:0 RI:0 EA:3
[ 9.736870][ T116] Krnl GPRS: ffffffffffffffff 00000000042d5b00
0000000000000000 0000000000000026
[ 9.736908][ T116] 0000000000000001 00000372000b9f40
00000000044b1e00 0000000008000075
[ 9.736945][ T116] 0700000008100073 00000000003939d8
00000372000b9f40 000000007fffe1c0
[ 9.736981][ T116] 0000000002d62200 0000000000000000
0000038000443c40 0000038000443c10
[ 9.737104][ T116] Krnl Code: 000000000040f4e2: c0f4fffb0927 brcl
15,0000000000370730
[ 9.737104][ T116] 000000000040f4e8: ec51ffff00d9 aghik
%r5,%r1,-1
[ 9.737104][ T116] #000000000040f4ee: a7f4ffc6 brc
15,000000000040f47a
[ 9.737104][ T116] >000000000040f4f2: e3b020880024 stg
%r11,136(%r2)
[ 9.737104][ T116] 000000000040f4f8: a7f4ffe2 brc
15,000000000040f4bc
[ 9.737104][ T116] 000000000040f4fc: 0707 bcr
0,%r7
[ 9.737104][ T116] 000000000040f4fe: 0707 bcr
0,%r7
[ 9.737104][ T116] 000000000040f500: c00400349b40 brcl
0,0000000000aa2b80
[ 9.737371][ T116] Call Trace:
[ 9.737422][ T116] [<000000000040f4f2>] __mod_lruvec_page_state+0xd2/0xe0
[ 9.737490][ T116] [<000000000012fcaa>] page_table_alloc+0x16a/0x290
[ 9.737542][ T116] [<00000000003939d8>] __handle_mm_fault+0x1038/0x1240
[ 9.737589][ T116] [<0000000000393cae>] handle_mm_fault+0xce/0x220
[ 9.737632][ T116] [<0000000000129508>] do_exception+0x1d8/0x4d0
[ 9.737676][ T116] [<0000000000129e2a>] do_dat_exception+0x2a/0x50
[ 9.737719][ T116] [<0000000000a5ab54>] __do_pgm_check+0xf4/0x1b0
[ 9.737768][ T116] [<0000000000a6b64c>] pgm_check_handler+0x11c/0x170
[ 9.737816][ T116] Last Breaking-Event-Address:
[ 9.737878][ T116] [<000000000040f4b8>] __mod_lruvec_page_state+0x98/0xe0
[ 9.737930][ T116] ---[ end trace 0000000000000000 ]---
[ 9.829692][ T118] Unable to handle kernel pointer dereference in virtual
kernel address space
[ 9.829814][ T118] Failing address: 0000000000000000 TEID: 0000000000000483
[ 9.829861][ T118] Fault in home space mode while using kernel ASCE.
[ 9.829993][ T118] AS:0000000001828007 R3:000000007ffec007
S:000000007fff1800 P:000000000000003d
[ 9.830118][ T118] Oops: 0004 ilc:3 [#3] SMP
[ 9.830214][ T118] Modules linked in:
[ 9.830265][ T118] CPU: 0 PID: 118 Comm: systemd-fstab-g Tainted: G D
6.0.0-rc6-1.g2132e28-default #1 openSUSE Tumbleweed (unreleased)
23ff4c3ab0b429314c21910f4f8cb21b0ff3e788
[ 9.830340][ T118] Hardware name: QEMU 2964 QEMU (KVM/Linux)
[ 9.830373][ T118] Krnl PSW : 0404d00180000000 000000000040f4f2
(__mod_lruvec_page_state+0xd2/0xe0)
[ 9.830458][ T118] R:0 T:1 IO:0 EX:0 Key:0 M:1 W:0 P:0 AS:3 CC:1
PM:0 RI:0 EA:3
[ 9.830521][ T118] Krnl GPRS: ffffffffffffffff 0000000002eb9e40
0000000000000000 0000000000000026
[ 9.830562][ T118] 0000000000000001 00000372000b9c40
00000000044b3700 0000000008100073
[ 9.830599][ T118] 070003ff861e0000 00000000003939d8
00000372000b9c40 000000007fffe1c0
[ 9.830635][ T118] 0000000002f38000 0000000000000000
0000038000133c40 0000038000133c10
[ 9.830723][ T118] Krnl Code: 000000000040f4e2: c0f4fffb0927 brcl
15,0000000000370730
[ 9.830723][ T118] 000000000040f4e8: ec51ffff00d9 aghik
%r5,%r1,-1
[ 9.830723][ T118] #000000000040f4ee: a7f4ffc6 brc
15,000000000040f47a
[ 9.830723][ T118] >000000000040f4f2: e3b020880024 stg
%r11,136(%r2)
[ 9.830723][ T118] 000000000040f4f8: a7f4ffe2 brc
15,000000000040f4bc
[ 9.830723][ T118] 000000000040f4fc: 0707 bcr
0,%r7
[ 9.830723][ T118] 000000000040f4fe: 0707 bcr
0,%r7
[ 9.830723][ T118] 000000000040f500: c00400349b40 brcl
0,0000000000aa2b80
[ 9.830999][ T118] Call Trace:
[ 9.831035][ T118] [<000000000040f4f2>] __mod_lruvec_page_state+0xd2/0xe0
[ 9.831088][ T118] [<000000000012fcaa>] page_table_alloc+0x16a/0x290
[ 9.831136][ T118] [<00000000003939d8>] __handle_mm_fault+0x1038/0x1240
[ 9.831194][ T118] [<0000000000393cae>] handle_mm_fault+0xce/0x220
[ 9.831235][ T118] [<0000000000129508>] do_exception+0x1d8/0x4d0
[ 9.831276][ T118] [<0000000000129e2a>] do_dat_exception+0x2a/0x50
[ 9.831317][ T118] [<0000000000a5ab54>] __do_pgm_check+0xf4/0x1b0
[ 9.831362][ T118] [<0000000000a6b64c>] pgm_check_handler+0x11c/0x170
[ 9.831406][ T118] Last Breaking-Event-Address:
[ 9.831431][ T118] [<000000000040f4b8>] __mod_lruvec_page_state+0x98/0xe0
[ 9.831757][ T118] ---[ end trace 0000000000000000 ]---
[ 99.908357][ T1] Unable to handle kernel pointer dereference in virtual
kernel address space
[ 99.908447][ T1] Failing address: 0000000000000000 TEID: 0000000000000483
[ 99.908488][ T1] Fault in home space mode while using kernel ASCE.
[ 99.908682][ T1] AS:0000000001828007 R3:000000007ffec007
S:000000007fff1800 P:000000000000003d
[ 99.909027][ T1] Oops: 0004 ilc:3 [#4] SMP
[ 99.909229][ T1] Modules linked in:
[ 99.909316][ T1] CPU: 0 PID: 1 Comm: systemd Tainted: G D
6.0.0-rc6-1.g2132e28-default #1 openSUSE Tumbleweed (unreleased)
23ff4c3ab0b429314c21910f4f8cb21b0ff3e788
[ 99.909411][ T1] Hardware name: QEMU 2964 QEMU (KVM/Linux)
[ 99.909464][ T1] Krnl PSW : 0404d00180000000 000000000040f4f2
(__mod_lruvec_page_state+0xd2/0xe0)
[ 99.909662][ T1] R:0 T:1 IO:0 EX:0 Key:0 M:1 W:0 P:0 AS:3 CC:1
PM:0 RI:0 EA:3
[ 99.909749][ T1] Krnl GPRS: 0000000000000001 0000000003b7ba00
0000000000000020 0000000000000026
[ 99.909790][ T1] 0000000000000001 00000372000ba240
00000000044b0f00 0000000008100073
[ 99.909851][ T1] 0700000008100073 00000000003938f2
00000372000ba240 000000007fffe1c0
[ 99.909894][ T1] 0000000003a6c400 0000000000000000
000003800000bc40 000003800000bc10
[ 99.909985][ T1] Krnl Code: 000000000040f4e2: c0f4fffb0927 brcl
15,0000000000370730
[ 99.909985][ T1] 000000000040f4e8: ec51ffff00d9 aghik
%r5,%r1,-1
[ 99.909985][ T1] #000000000040f4ee: a7f4ffc6 brc
15,000000000040f47a
[ 99.909985][ T1] >000000000040f4f2: e3b020880024 stg
%r11,136(%r2)
[ 99.909985][ T1] 000000000040f4f8: a7f4ffe2 brc
15,000000000040f4bc
[ 99.909985][ T1] 000000000040f4fc: 0707 bcr
0,%r7
[ 99.909985][ T1] 000000000040f4fe: 0707 bcr
0,%r7
[ 99.909985][ T1] 000000000040f500: c00400349b40 brcl
0,0000000000aa2b80
[ 99.910420][ T1] Call Trace:
[ 99.910467][ T1] [<000000000040f4f2>] __mod_lruvec_page_state+0xd2/0xe0
[ 99.910551][ T1] [<000000000012fcaa>] page_table_alloc+0x16a/0x290
[ 99.910607][ T1] [<00000000003938f2>] __handle_mm_fault+0xf52/0x1240
[ 99.910658][ T1] [<0000000000393cae>] handle_mm_fault+0xce/0x220
[ 99.910720][ T1] [<0000000000129508>] do_exception+0x1d8/0x4d0
[ 99.910827][ T1] [<0000000000129e2a>] do_dat_exception+0x2a/0x50
[ 99.910873][ T1] [<0000000000a5ab54>] __do_pgm_check+0xf4/0x1b0
[ 99.910922][ T1] [<0000000000a6b64c>] pgm_check_handler+0x11c/0x170
[ 99.910969][ T1] Last Breaking-Event-Address:
[ 99.910995][ T1] [<000000000040f4b8>] __mod_lruvec_page_state+0x98/0xe0
[ 99.911607][ T1] ---[ end trace 0000000000000000 ]---
[ 99.912219][ T1] Kernel panic - not syncing: Attempted to kill init!
exitcode=0x0000000b