** Also affects: ubuntu-z-systems
Importance: Undecided
Status: New
** Changed in: ubuntu-z-systems
Assignee: (unassigned) => Skipper Bug Screeners (skipper-screen-team)
** Changed in: ubuntu-z-systems
Importance: Undecided => High
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https://bugs.launchpad.net/bugs/1968096
Title:
[UBUNTU 20.04] Null Pointer issue in nfs code running Ubuntu on IBM Z
Status in Ubuntu on IBM z Systems:
New
Status in linux package in Ubuntu:
New
Bug description:
State the component where the Bug is occuring:
kernel
Indicate the nature of the problem by answering the below questions:
- Is this problem reproducible? No
No, steps unknown, but we have seen these before
- Is the system sitting at a debugger (kdb, or xmon)? No
- Is the system hung? No
No, dumped and rebooted
- Are there any custom patches installed? Yes
On base system level (CloudAppliance) we are still running with the zfpc_proc
module loaded. But no recent changes in the module and is running absolutely
stable in HA (same kernel and userspace, Ubuntu 20.04 LTS)
- Is there any special hardware that may be relevant to this problem?
Yes
We are running with mlx (cloud network adapters) installed.
- Is access information for the machine the problem was found on available?
Yes
- Is the bug occuring in a userspace application? No
- Was a stack trace produced? Yes
This is what mention in first comment by @Boris Barth
- Did the system produce an Oops message on the console? Yes
[556585.270902] illegal operation: 0001 ilc:1 [#10] SMP
[556585.270905] Modules linked in: vhost_net macvtap macvlan tap
rpcsec_gss_krb5 auth_rpcgss nfsv3 nfs_acl nfs lockd grace fscache veth
xt_statistic ipt_REJECT nf_reject_ipv4 ip_vs_sh ip_vs_wrr ip_vs_rr ip_vs
iptable_mangle xt_mark sunrpc nf_log_ipv6 nf_log_ipv4 nf_log_common xt_LOG
xt_limit xt_set ip_set_hash_net ip_set_hash_ip ip_set tcp_diag inet_diag
xt_comment xt_nat cls_cgroup sch_htb act_gact sch_multiq act_mirred act_pedit
act_tunnel_key cls_flower act_police cls_u32 vxlan ip6_udp_tunnel udp_tunnel
dummy nf_tables ebtable_filter ebtables xfrm4_tunnel tunnel4 ipcomp xfrm_ipcomp
esp4 ah4 af_key sch_ingress mlx5_ib ib_uverbs ib_core mlx5_core tls mlxfw ptp
pps_core dm_integrity async_xor async_tx dm_bufio bonding xt_MASQUERADE
nf_conntrack_netlink nfnetlink xfrm_user xfrm_algo xt_addrtype iptable_nat
nf_nat br_netfilter bridge vhost_vsock vmw_vsock_virtio_transport_common vhost
vsock 8021q garp mrp stp llc xt_multiport xt_tcpudp qeth_l2 lcs ctcm fsm
dasd_fba_mod aufs overlay scsi_dh_rdac
[556585.270923] scsi_dh_emc s390_trng xt_state xt_conntrack nf_conntrack
nf_defrag_ipv6 nf_defrag_ipv4 ip6table_filter ip6_tables iptable_filter
bpfilter sch_fq_codel zFPC_proc(OE) zFPC_diag(OE) vfio_ap vfio_mdev drm
vfio_iommu_type1 drm_panel_orientation_quirks i2c_core ip_tables x_tables
scsi_dh_alua pkey zcrypt ghash_s390 prng aes_s390 des_s390 libdes sha3_512_s390
sha3_256_s390 sha512_s390 sha256_s390 sha1_s390 sha_common chsc_sch qeth
ccwgroup eadm_sch vfio_ccw mdev vfio btrfs libcrc32c crc32_vx_s390 xor
zstd_compress raid6_pq dm_crypt virtio_blk dm_service_time dm_multipath zfcp
scsi_transport_fc qdio dasd_eckd_mod dasd_mod zlib_deflate [last unloaded: tls]
[556585.270945] CPU: 28 PID: 217741 Comm: worker Kdump: loaded Tainted: G
D OE 5.4.0-90-generic #101-Ubuntu
[556585.270947] Hardware name: IBM 8562 GT2 A00 (LPAR)
[556585.270948] Krnl PSW : 0704d00180000000 0000000000000002 (0x2)
[556585.270951] R:0 T:1 IO:1 EX:1 Key:0 M:1 W:0 P:0 AS:3 CC:1 PM:0
RI:0 EA:3
[556585.270953] Krnl GPRS: 0000000000000000 0000000000000000 000003e010ebbcf8
00000071c45e1ec0
[556585.270954] 0000000000000000 0000002816f7b18c 00000078dd36a4a0
000000713a62f718
[556585.270955] 0000000000000000 000003e010ebbcf8 0000000000000068
00000071c45e1ec0
[556585.270957] 0000006090a12200 0000000000000c40 000003ff80d6fb54
000003e010ebbbf0
[556585.270959] Krnl Code:#0000000000000000: 0000 illegal
>0000000000000002: 0000 illegal
0000000000000004: 0000 illegal
0000000000000006: 0000 illegal
0000000000000008: 0000 illegal
000000000000000a: 0000 illegal
000000000000000c: 0000 illegal
000000000000000e: 0000 illegal
[556585.270967] Call Trace:
[556585.270982] ([<000003ff80d6fb1a>] rpcauth_lookup_credcache+0x5a/0x300
[sunrpc])
[556585.270993] [<000003ff80e1182c>] nfs_ctx_key_to_expire+0xec/0x130 [nfs]
[556585.271004] [<000003ff80e1189c>] nfs_key_timeout_notify+0x2c/0x70 [nfs]
[556585.271014] [<000003ff80dfdf7e>] nfs_file_write+0x3e/0x320 [nfs]
[556585.271016] [<00000028165944a8>] new_sync_write+0x118/0x1b0
[556585.271017] [<0000002816594ee0>] vfs_write+0xb0/0x1b0
[556585.271019] [<0000002816596a1e>] ksys_pwrite64+0x7e/0xc0
[556585.271021] [<0000002816bb26b2>] system_call+0x2a6/0x2c8
- Was a system dump produced ie kdump, netdumpmp, or LKCD? Yes
That is the kdump where the stacktrace from.
Enter data below to accurately describe the problem:
- Problem description:
Null Pointer issue in nfs code running Ubuntu Ubuntu 18.04 with HWE kernel
5.4 on IBM Z
- Enter uname -a output:
@lon1-qz1-sr4-rk101-s04> uname -a
Linux lon1-qz1-sr4-rk101-s04 5.4.0-90-generic #101-Ubuntu SMP Fri Oct 15
19:59:45 UTC 2021 s390x s390x s390x GNU/Linux
- Enter failing machine type and model (ie p520 9111-520 lpar, x336
47U-8637):
Manufacturer: IBM
Type: 8562
Model: A00 GT2
Model Capacity: A00 00000000
Capacity Adj. Ind.: 100
LPAR CPUs Total: 16
LPAR CPUs Configured: 16
LPAR CPUs Standby: 0
LPAR CPUs Reserved: 0
LPAR CPUs Dedicated: 0
LPAR CPUs Shared: 16
LPAR CPUs G-MTID: 0
LPAR CPUs S-MTID: 1
LPAR CPUs PS-MTID: 1
- Enter primary and backup contact information (name/email):
Prabhat Ranjan
pranj...@in.ibm.com
Christoph Schlameu?
schlame...@de.ibm.com
- Detail the configuration of the additonal hardware
- Enter common userspace tool name: N/A
- Enter name of userspace RPM: N/A
- If failing tool is obtained from project website vs RPM install, what is
the version/release/mod.
If from the project's CVS, what is the branch tag and date of checkout (put
"na" if not applicable)?
N/A
- Is the failing userspace tool 32-bit, 64-bit, or both? N/A
- Describe how unresponsive the system is. What steps have you taken to
reclaim the system:
kernel oops was detected and automatically dumped and restarted
- Is a debugger configured (xmon or kdb enabled)? No
- Enter Oops message from console:
[556585.270902] illegal operation: 0001 ilc:1 [#10] SMP
[556585.270905] Modules linked in: vhost_net macvtap macvlan tap
rpcsec_gss_krb5 auth_rpcgss nfsv3 nfs_acl nfs lockd grace fscache veth
xt_statistic ipt_REJECT nf_reject_ipv4 ip_vs_sh ip_vs_wrr ip_vs_rr ip_vs
iptable_mangle xt_mark sunrpc nf_log_ipv6 nf_log_ipv4 nf_log_common xt_LOG
xt_limit xt_set ip_set_hash_net ip_set_hash_ip ip_set tcp_diag inet_diag
xt_comment xt_nat cls_cgroup sch_htb act_gact sch_multiq act_mirred act_pedit
act_tunnel_key cls_flower act_police cls_u32 vxlan ip6_udp_tunnel udp_tunnel
dummy nf_tables ebtable_filter ebtables xfrm4_tunnel tunnel4 ipcomp xfrm_ipcomp
esp4 ah4 af_key sch_ingress mlx5_ib ib_uverbs ib_core mlx5_core tls mlxfw ptp
pps_core dm_integrity async_xor async_tx dm_bufio bonding xt_MASQUERADE
nf_conntrack_netlink nfnetlink xfrm_user xfrm_algo xt_addrtype iptable_nat
nf_nat br_netfilter bridge vhost_vsock vmw_vsock_virtio_transport_common vhost
vsock 8021q garp mrp stp llc xt_multiport xt_tcpudp qeth_l2 lcs ctcm fsm
dasd_fba_mod aufs overlay scsi_dh_rdac
[556585.270923] scsi_dh_emc s390_trng xt_state xt_conntrack nf_conntrack
nf_defrag_ipv6 nf_defrag_ipv4 ip6table_filter ip6_tables iptable_filter
bpfilter sch_fq_codel zFPC_proc(OE) zFPC_diag(OE) vfio_ap vfio_mdev drm
vfio_iommu_type1 drm_panel_orientation_quirks i2c_core ip_tables x_tables
scsi_dh_alua pkey zcrypt ghash_s390 prng aes_s390 des_s390 libdes sha3_512_s390
sha3_256_s390 sha512_s390 sha256_s390 sha1_s390 sha_common chsc_sch qeth
ccwgroup eadm_sch vfio_ccw mdev vfio btrfs libcrc32c crc32_vx_s390 xor
zstd_compress raid6_pq dm_crypt virtio_blk dm_service_time dm_multipath zfcp
scsi_transport_fc qdio dasd_eckd_mod dasd_mod zlib_deflate [last unloaded: tls]
[556585.270945] CPU: 28 PID: 217741 Comm: worker Kdump: loaded Tainted: G
D OE 5.4.0-90-generic #101-Ubuntu
[556585.270947] Hardware name: IBM 8562 GT2 A00 (LPAR)
[556585.270948] Krnl PSW : 0704d00180000000 0000000000000002 (0x2)
[556585.270951] R:0 T:1 IO:1 EX:1 Key:0 M:1 W:0 P:0 AS:3 CC:1 PM:0
RI:0 EA:3
[556585.270953] Krnl GPRS: 0000000000000000 0000000000000000 000003e010ebbcf8
00000071c45e1ec0
[556585.270954] 0000000000000000 0000002816f7b18c 00000078dd36a4a0
000000713a62f718
[556585.270955] 0000000000000000 000003e010ebbcf8 0000000000000068
00000071c45e1ec0
[556585.270957] 0000006090a12200 0000000000000c40 000003ff80d6fb54
000003e010ebbbf0
[556585.270959] Krnl Code:#0000000000000000: 0000 illegal
>0000000000000002: 0000 illegal
0000000000000004: 0000 illegal
0000000000000006: 0000 illegal
0000000000000008: 0000 illegal
000000000000000a: 0000 illegal
000000000000000c: 0000 illegal
000000000000000e: 0000 illegal
[556585.270967] Call Trace:
[556585.270982] ([<000003ff80d6fb1a>] rpcauth_lookup_credcache+0x5a/0x300
[sunrpc])
[556585.270993] [<000003ff80e1182c>] nfs_ctx_key_to_expire+0xec/0x130 [nfs]
[556585.271004] [<000003ff80e1189c>] nfs_key_timeout_notify+0x2c/0x70 [nfs]
[556585.271014] [<000003ff80dfdf7e>] nfs_file_write+0x3e/0x320 [nfs]
[556585.271016] [<00000028165944a8>] new_sync_write+0x118/0x1b0
[556585.271017] [<0000002816594ee0>] vfs_write+0xb0/0x1b0
[556585.271019] [<0000002816596a1e>] ksys_pwrite64+0x7e/0xc0
[556585.271021] [<0000002816bb26b2>] system_call+0x2a6/0x2c8
- Detail the steps to reproduce this problem: unknown
- Was the system configured to capture a system dump? Yes
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