Public bug reported:
Issue found on s390x zVM "kernel04" with Focal 5.4.0-105-generic
With the stress-ng V0.13.12 in tip-testing branch [1], the sigchld failed with:
10:01:55 DEBUG| [stdout] sigabrt STARTING
10:02:26 DEBUG| [stdout] sigabrt RETURNED 0
10:03:55 DEBUG| [stdout] sigabrt PASSED
10:03:55 DEBUG| [stdout] sigchld STARTING
10:31:00 INFO | Timer expired (2100 sec.), nuking pid 18392
Error message from syslog:
Mar 9 10:01:55 kernel04 stress-ng: info: [155208] dispatching hogs: 4 sigabrt
Mar 9 10:02:11 kernel04 stress-ng: info: [155208] successful run completed in
15.98s
Mar 9 10:03:19 kernel04 kernel: [45704.373116] ------------[ cut here
]------------
Mar 9 10:03:19 kernel04 kernel: [45704.373119] kernel BUG at mm/zswap.c:896!
Mar 9 10:03:19 kernel04 kernel: [45725.378594] rcu: INFO: rcu_sched detected
stalls on CPUs/tasks:
Mar 9 10:03:19 kernel04 kernel: [45739.497899] rcu: 1-....: (1 ticks this
GP) idle=426/1/0x4000000000000002 softirq=113158/113161 fqs=1050
Mar 9 10:03:19 kernel04 kernel: [45739.497930] (detected by 6, t=2102
jiffies, g=246925, q=780)
Mar 9 10:03:19 kernel04 kernel: [45739.497932] Task dump for CPU 1:
Mar 9 10:03:19 kernel04 kernel: [45739.497935] apport R running task
0 155527 2 0x00000004
Mar 9 10:03:19 kernel04 kernel: [45739.497938] Call Trace:
Mar 9 10:03:19 kernel04 kernel: [45739.497944] ([<0000000042a1e600>]
0x42a1e600)
Mar 9 10:03:19 kernel04 kernel: [45739.498148] illegal operation: 0001 ilc:1
[#1] SMP
Mar 9 10:03:19 kernel04 kernel: [45739.498153] Modules linked in: sctp
vhost_net tap vhost_vsock vmw_vsock_virtio_transport_common vhost vsock
dccp_ipv4 dccp tgr192 streebog_generic sm3_generic sha3_generic rmd320 rmd256
rmd160 rmd128 nhpoly1305 poly1305_generic michael_mic md4 cmac ccm algif_rng
twofish_generic twofish_common tea sm4_generic serpent_generic seed khazad
fcrypt des_generic cast6_generic cast5_generic cast_common camellia_generic
blowfish_generic blowfish_common anubis algif_skcipher algif_hash aegis128
algif_aead af_alg nf_conntrack_netlink xfrm_user xfrm_algo xt_addrtype
br_netfilter overlay xt_conntrack ipt_REJECT nf_reject_ipv4 ip6table_mangle
ip6table_nat aufs nf_tables nfnetlink ip6table_filter ip6_tables iptable_mangle
xt_CHECKSUM iptable_nat xt_MASQUERADE xt_tcpudp bridge stp llc iptable_filter
bpfilter openvswitch nsh nf_conncount nf_nat nf_conntrack nf_defrag_ipv6
nf_defrag_ipv4 binfmt_misc zfs(PO) zunicode(PO) zlua(PO) zcommon(PO)
znvpair(PO) zavl(PO) icp(PO) dm_multipath scsi_dh_rdac spl(O)
Mar 9 10:03:19 kernel04 kernel: [45739.498240] scsi_dh_emc scsi_dh_alua vmur
vfio_ccw vfio_mdev mdev vfio_iommu_type1 vfio sch_fq_codel nfsd drm auth_rpcgss
drm_panel_orientation_quirks nfs_acl lockd i2c_core grace sunrpc ip_tables
x_tables btrfs zstd_compress zlib_deflate raid10 raid456 async_raid6_recov
async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid1 raid0
linear pkey zcrypt crc32_vx_s390 ghash_s390 prng aes_s390 des_s390 libdes
qeth_l2 dasd_eckd_mod sha512_s390 sha256_s390 qeth sha1_s390 sha_common qdio
ccwgroup dasd_mod
Mar 9 10:03:19 kernel04 kernel: [45739.498296] CPU: 1 PID: 155527 Comm: apport
Tainted: P O 5.4.0-105-generic #119-Ubuntu
Mar 9 10:03:19 kernel04 kernel: [45739.498298] Hardware name: IBM 2964 N63 400
(z/VM 6.4.0)
Mar 9 10:03:19 kernel04 kernel: [45739.498299] Krnl PSW : 0704c00180000000
000000009facabca (zswap_writeback_entry+0x32a/0x340)
Mar 9 10:03:19 kernel04 kernel: [45739.498308] R:0 T:1 IO:1 EX:1
Key:0 M:1 W:0 P:0 AS:3 CC:0 PM:0 RI:0 EA:3
Mar 9 10:03:19 kernel04 kernel: [45739.498310] Krnl GPRS: 0000000000000000
0000000042a1e600 ffffffffffffffea 0000000000001000
Mar 9 10:03:19 kernel04 kernel: [45739.498312] 00000000ad302000
00000000ad303000 000003e0ffffffea 00000000e6fe7278
Mar 9 10:03:19 kernel04 kernel: [45739.498314] 000003d082b4c080
00000000e6fe7270 000000000003689a 00000000a2ba7d58
Mar 9 10:03:19 kernel04 kernel: [45739.498315] 0000000042a1e600
000000009814ec00 000000009facaa88 000003e00f1432b8
Mar 9 10:03:19 kernel04 kernel: [45739.498324] Krnl Code: 000000009facabbc:
c0e50032bb1a brasl %r14,00000000a01221f0
Mar 9 10:03:19 kernel04 kernel: [45739.498324] 000000009facabc2:
a7f4ffaa brc 15,000000009facab16
Mar 9 10:03:19 kernel04 kernel: [45739.498324] #000000009facabc6:
a7f40001 brc 15,000000009facabc8
Mar 9 10:03:19 kernel04 kernel: [45739.498324] >000000009facabca:
ec81ffff00d9 aghik %r8,%r1,-1
Mar 9 10:03:19 kernel04 kernel: [45739.498324] 000000009facabd0:
a7f4fefe brc 15,000000009faca9cc
Mar 9 10:03:19 kernel04 kernel: [45739.498324] 000000009facabd4:
0707 bcr 0,%r7
Mar 9 10:03:19 kernel04 kernel: [45739.498324] 000000009facabd6:
0707 bcr 0,%r7
Mar 9 10:03:19 kernel04 kernel: [45739.498324] 000000009facabd8:
0707 bcr 0,%r7
Mar 9 10:03:19 kernel04 kernel: [45739.498341] Call Trace:
Mar 9 10:03:19 kernel04 kernel: [45739.498344] ([<000000009facaa88>]
zswap_writeback_entry+0x1e8/0x340)
Mar 9 10:03:19 kernel04 kernel: [45739.498348] [<000000009fb0a23c>]
zbud_reclaim_page+0x14c/0x2b0
Mar 9 10:03:19 kernel04 kernel: [45739.498350] [<000000009fb0a3e0>]
zbud_zpool_shrink+0x40/0x80
Mar 9 10:03:19 kernel04 kernel: [45739.498352] [<000000009facae72>]
zswap_frontswap_store+0x292/0x5c0
Mar 9 10:03:19 kernel04 kernel: [45739.498354] [<000000009fac91a4>]
__frontswap_store+0xb4/0x1a0
Mar 9 10:03:19 kernel04 kernel: [45739.498358] [<000000009fac05ba>]
swap_writepage+0x5a/0xc0
Mar 9 10:03:19 kernel04 kernel: [45739.498363] [<000000009fa66908>]
pageout.isra.0+0x118/0x3e0
Mar 9 10:03:19 kernel04 kernel: [45739.498366] [<000000009fa6a9fc>]
shrink_page_list+0xa3c/0xe90
Mar 9 10:03:19 kernel04 kernel: [45739.498368] [<000000009fa6ba50>]
shrink_inactive_list+0x1f0/0x4e0
Mar 9 10:03:19 kernel04 kernel: [45739.498372] [<000000009fa6c644>]
shrink_node_memcg+0x2f4/0x3f0
Mar 9 10:03:19 kernel04 kernel: [45739.498374] [<000000009fa6c804>]
shrink_node+0xc4/0x4d0
Mar 9 10:03:19 kernel04 kernel: [45739.498376] [<000000009fa6ccee>]
do_try_to_free_pages+0xde/0x400
Mar 9 10:03:19 kernel04 kernel: [45739.498379] [<000000009fa6d0fe>]
try_to_free_pages+0xee/0x230
Mar 9 10:03:19 kernel04 kernel: [45739.498382] [<000000009fab9c8c>]
__alloc_pages_slowpath+0x31c/0xe90
Mar 9 10:03:19 kernel04 kernel: [45739.498385] [<000000009fabaab4>]
__alloc_pages_nodemask+0x2b4/0x330
Mar 9 10:03:19 kernel04 kernel: [45739.498391] [<000000009f877a62>]
page_table_alloc+0x122/0x270
Mar 9 10:03:19 kernel04 kernel: [45739.498395] [<000000009fa9345a>]
__pte_alloc+0x2a/0xe0
Mar 9 10:03:19 kernel04 kernel: [45739.498398] [<000000009fa938ea>]
do_anonymous_page+0x3da/0x5c0
Mar 9 10:03:19 kernel04 kernel: [45739.498400] [<000000009fa98052>]
__handle_mm_fault+0x7a2/0x910
Mar 9 10:03:19 kernel04 kernel: [45739.498403] [<000000009fa98286>]
handle_mm_fault+0xc6/0x180
Mar 9 10:03:19 kernel04 kernel: [45739.498408] [<000000009f871770>]
do_dat_exception+0x120/0x3d0
Mar 9 10:03:19 kernel04 kernel: [45739.498413] [<00000000a0134e9e>]
pgm_check_handler+0x1da/0x230
Mar 9 10:03:19 kernel04 kernel: [45739.498414] Last Breaking-Event-Address:
Mar 9 10:03:19 kernel04 kernel: [45739.498416] [<000000009facabc6>]
zswap_writeback_entry+0x326/0x340
Mar 9 10:03:19 kernel04 kernel: [45739.498420] ---[ end trace 224932a82b86d475
]---
Mar 9 10:03:19 kernel04 kernel: [45739.498431] ------------[ cut here
]------------
Mar 9 10:03:19 kernel04 kernel: [45739.498436] WARNING: CPU: 1 PID: 155527 at
kernel/exit.c:726 do_exit+0x40/0xb60
Mar 9 10:03:19 kernel04 kernel: [45739.498437] Modules linked in: sctp
vhost_net tap vhost_vsock vmw_vsock_virtio_transport_common vhost vsock
dccp_ipv4 dccp tgr192 streebog_generic sm3_generic sha3_generic rmd320 rmd256
rmd160 rmd128 nhpoly1305 poly1305_generic michael_mic md4 cmac ccm algif_rng
twofish_generic twofish_common tea sm4_generic serpent_generic seed khazad
fcrypt des_generic cast6_generic cast5_generic cast_common camellia_generic
blowfish_generic blowfish_common anubis algif_skcipher algif_hash aegis128
algif_aead af_alg nf_conntrack_netlink xfrm_user xfrm_algo xt_addrtype
br_netfilter overlay xt_conntrack ipt_REJECT nf_reject_ipv4 ip6table_mangle
ip6table_nat aufs nf_tables nfnetlink ip6table_filter ip6_tables iptable_mangle
xt_CHECKSUM iptable_nat xt_MASQUERADE xt_tcpudp bridge stp llc iptable_filter
bpfilter openvswitch nsh nf_conncount nf_nat nf_conntrack nf_defrag_ipv6
nf_defrag_ipv4 binfmt_misc zfs(PO) zunicode(PO) zlua(PO) zcommon(PO)
znvpair(PO) zavl(PO) icp(PO) dm_multipath scsi_dh_rdac spl(O)
Mar 9 10:03:19 kernel04 kernel: [45739.498471] scsi_dh_emc scsi_dh_alua vmur
vfio_ccw vfio_mdev mdev vfio_iommu_type1 vfio sch_fq_codel nfsd drm auth_rpcgss
drm_panel_orientation_quirks nfs_acl lockd i2c_core grace sunrpc ip_tables
x_tables btrfs zstd_compress zlib_deflate raid10 raid456 async_raid6_recov
async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid1 raid0
linear pkey zcrypt crc32_vx_s390 ghash_s390 prng aes_s390 des_s390 libdes
qeth_l2 dasd_eckd_mod sha512_s390 sha256_s390 qeth sha1_s390 sha_common qdio
ccwgroup dasd_mod
Mar 9 10:03:19 kernel04 kernel: [45739.498498] CPU: 1 PID: 155527 Comm: apport
Tainted: P D O 5.4.0-105-generic #119-Ubuntu
Mar 9 10:03:19 kernel04 kernel: [45739.498499] Hardware name: IBM 2964 N63 400
(z/VM 6.4.0)
Mar 9 10:03:19 kernel04 kernel: [45739.498501] Krnl PSW : 0704e00180000000
000000009f8ccaa0 (do_exit+0x40/0xb60)
Mar 9 10:03:19 kernel04 kernel: [45739.498505] R:0 T:1 IO:1 EX:1
Key:0 M:1 W:0 P:0 AS:3 CC:2 PM:0 RI:0 EA:3
Mar 9 10:03:19 kernel04 kernel: [45739.498508] Krnl GPRS: 000000000000000a
000003e00f1438a8 00000000e7eb0348 0000000000000007
Mar 9 10:03:19 kernel04 kernel: [45739.498510] 0000000000000007
00000000a06fe098 0000000000000001 000000000000000b
Mar 9 10:03:19 kernel04 kernel: [45739.498511] 0704c00180000000
000000009f84d200 00000000a02c4bf8 0000000042a1e600
Mar 9 10:03:19 kernel04 kernel: [45739.498514] 0000000042a1e600
0000000000000000 000003e00f143088 000003e00f143018
Mar 9 10:03:19 kernel04 kernel: [45739.498520] Krnl Code: 000000009f8cca90:
e32010000004 lg %r2,0(%r1)
Mar 9 10:03:19 kernel04 kernel: [45739.498520] 000000009f8cca96:
ec1203598064 cgrj %r1,%r2,8,000000009f8cd148
Mar 9 10:03:19 kernel04 kernel: [45739.498520] #000000009f8cca9c:
a7f40001 brc 15,000000009f8cca9e
Mar 9 10:03:19 kernel04 kernel: [45739.498520] >000000009f8ccaa0:
588003a8 l %r8,936
Mar 9 10:03:19 kernel04 kernel: [45739.498520] 000000009f8ccaa4:
ecd82bb70055 risbg %r13,%r8,43,183,0
Mar 9 10:03:19 kernel04 kernel: [45739.498520] 000000009f8ccaaa:
a774055b brc 7,000000009f8cd560
Mar 9 10:03:19 kernel04 kernel: [45739.498520] 000000009f8ccaae:
e310b6b00012 lt %r1,1712(%r11)
Mar 9 10:03:19 kernel04 kernel: [45739.498520] 000000009f8ccab4:
a7840550 brc 8,000000009f8cd554
Mar 9 10:03:19 kernel04 kernel: [45739.498542] Call Trace:
Mar 9 10:03:19 kernel04 kernel: [45739.498544] ([<224932a82b86d475>]
0x224932a82b86d475)
Mar 9 10:03:19 kernel04 kernel: [45739.498548] [<000000009f8603ea>]
die+0x14a/0x170
Mar 9 10:03:19 kernel04 kernel: [45739.498551] [<000000009f84d340>]
illegal_op+0x140/0x150
Mar 9 10:03:19 kernel04 kernel: [45739.498553] [<00000000a0134e9e>]
pgm_check_handler+0x1da/0x230
Mar 9 10:03:19 kernel04 kernel: [45739.498555] [<000000009facabca>]
zswap_writeback_entry+0x32a/0x340
Mar 9 10:03:19 kernel04 kernel: [45739.498558] ([<000000009facaa88>]
zswap_writeback_entry+0x1e8/0x340)
Mar 9 10:03:19 kernel04 kernel: [45739.498561] [<000000009fb0a23c>]
zbud_reclaim_page+0x14c/0x2b0
Mar 9 10:03:19 kernel04 kernel: [45739.498566] [<000000009fb0a3e0>]
zbud_zpool_shrink+0x40/0x80
Mar 9 10:03:19 kernel04 kernel: [45739.498569] [<000000009facae72>]
zswap_frontswap_store+0x292/0x5c0
Mar 9 10:03:19 kernel04 kernel: [45739.498571] [<000000009fac91a4>]
__frontswap_store+0xb4/0x1a0
Mar 9 10:03:19 kernel04 kernel: [45739.498574] [<000000009fac05ba>]
swap_writepage+0x5a/0xc0
Mar 9 10:03:19 kernel04 kernel: [45739.498576] [<000000009fa66908>]
pageout.isra.0+0x118/0x3e0
Mar 9 10:03:19 kernel04 kernel: [45739.498579] [<000000009fa6a9fc>]
shrink_page_list+0xa3c/0xe90
Mar 9 10:03:19 kernel04 kernel: [45739.498582] [<000000009fa6ba50>]
shrink_inactive_list+0x1f0/0x4e0
Mar 9 10:03:19 kernel04 kernel: [45739.498584] [<000000009fa6c644>]
shrink_node_memcg+0x2f4/0x3f0
Mar 9 10:03:19 kernel04 kernel: [45739.498586] [<000000009fa6c804>]
shrink_node+0xc4/0x4d0
Mar 9 10:03:19 kernel04 kernel: [45739.498589] [<000000009fa6ccee>]
do_try_to_free_pages+0xde/0x400
Mar 9 10:03:19 kernel04 kernel: [45739.498592] [<000000009fa6d0fe>]
try_to_free_pages+0xee/0x230
Mar 9 10:03:19 kernel04 kernel: [45739.498594] [<000000009fab9c8c>]
__alloc_pages_slowpath+0x31c/0xe90
Mar 9 10:03:19 kernel04 kernel: [45739.498596] [<000000009fabaab4>]
__alloc_pages_nodemask+0x2b4/0x330
Mar 9 10:03:19 kernel04 kernel: [45739.498599] [<000000009f877a62>]
page_table_alloc+0x122/0x270
Mar 9 10:03:19 kernel04 kernel: [45739.498601] [<000000009fa9345a>]
__pte_alloc+0x2a/0xe0
Mar 9 10:03:19 kernel04 kernel: [45739.498603] [<000000009fa938ea>]
do_anonymous_page+0x3da/0x5c0
Mar 9 10:03:19 kernel04 kernel: [45739.498606] [<000000009fa98052>]
__handle_mm_fault+0x7a2/0x910
Mar 9 10:03:19 kernel04 kernel: [45739.498608] [<000000009fa98286>]
handle_mm_fault+0xc6/0x180
Mar 9 10:03:19 kernel04 kernel: [45739.498611] [<000000009f871770>]
do_dat_exception+0x120/0x3d0
Mar 9 10:03:19 kernel04 kernel: [45739.498614] [<00000000a0134e9e>]
pgm_check_handler+0x1da/0x230
Mar 9 10:03:19 kernel04 kernel: [45739.498615] Last Breaking-Event-Address:
Mar 9 10:03:19 kernel04 kernel: [45739.498618] [<000000009f8cca9c>]
do_exit+0x3c/0xb60
Mar 9 10:03:19 kernel04 kernel: [45739.498620] ---[ end trace 224932a82b86d476
]---
Please find the complete log in the attachment.
[1] https://git.launchpad.net/~canonical-kernel-team/+git/stress-
ng?h=tip-testing
** Affects: ubuntu-kernel-tests
Importance: Undecided
Status: New
** Affects: linux (Ubuntu)
Importance: Undecided
Status: Incomplete
** Affects: linux (Ubuntu Focal)
Importance: Undecided
Status: Incomplete
** Tags: 5.4 focal s390x ubuntu-stress-smoke-test
** Attachment added: "sigchld-s390x.log"
https://bugs.launchpad.net/bugs/1964336/+attachment/5567336/+files/sigchld-s390x.log
** Summary changed:
- sigchld with stress-ng V0.13.12 failed on F-5.4 s390x
+ sigchld with stress-ng V0.13.12 failed on F-5.4 s390x (kernel BUG at
mm/zswap.c:896)
** Also affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Focal)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1964336
Title:
sigchld with stress-ng V0.13.12 failed on F-5.4 s390x (kernel BUG at
mm/zswap.c:896)
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