Description of problem:

Core is dumped consistently while running "/usr/sbin/dump_fts" for infiniban-diags for RDMA hosts.


Version-Release number of selected component (if applicable):

DISTRO=RHEL-8.4.0-20210309.1

+ [21-04-02 16:29:07] cat /etc/redhat-release
Red Hat Enterprise Linux release 8.4 Beta (Ootpa)

+ [21-04-02 16:29:07] uname -a
Linux rdma-virt-02.lab.bos.redhat.com 4.18.0-293.el8.x86_64 #1 SMP Mon Mar 1 10:04:09 EST 2021 x86_64 x86_64 x86_64 GNU/Linux

+ [21-04-02 16:29:07] cat /proc/cmdline
BOOT_IMAGE=(hd0,msdos1)/vmlinuz-4.18.0-293.el8.x86_64 root=UUID=34b90771-4181-41fd-88ae-42b3bbd44439 ro intel_idle.max_cstate=0 processor.max_cstate=0 intel_iommu=on iommu=on console=tty0 rd_NO_PLYMOUTH crashkernel=auto resume=UUID=d9d59ac4-2aa3-4f3c-b5e6-81b2812a7afa console=ttyS1,115200n81

+ [21-04-02 16:29:07] rpm -q rdma-core linux-firmware
rdma-core-32.0-4.el8.x86_64
linux-firmware-20201218-102.git05789708.el8.noarch

+ [21-04-02 16:29:07] tail /sys/class/infiniband/mlx5_0/fw_ver /sys/class/infiniband/mlx5_1/fw_ver /sys/class/infiniband/mlx5_bond_0/fw_ver
==> /sys/class/infiniband/mlx5_0/fw_ver <==
12.28.2006

==> /sys/class/infiniband/mlx5_1/fw_ver <==
12.28.2006

==> /sys/class/infiniband/mlx5_bond_0/fw_ver <==
14.29.2002
+ [21-04-02 16:29:07] lspci
+ [21-04-02 16:29:07] grep -i -e ethernet -e infiniband -e omni -e ConnectX
02:00.0 Ethernet controller: Broadcom Inc. and subsidiaries NetXtreme BCM5720 2-port Gigabit Ethernet PCIe
02:00.1 Ethernet controller: Broadcom Inc. and subsidiaries NetXtreme BCM5720 2-port Gigabit Ethernet PCIe
03:00.0 Ethernet controller: Broadcom Inc. and subsidiaries NetXtreme BCM5720 2-port Gigabit Ethernet PCIe
03:00.1 Ethernet controller: Broadcom Inc. and subsidiaries NetXtreme BCM5720 2-port Gigabit Ethernet PCIe
04:00.0 Infiniband controller: Mellanox Technologies MT27700 Family [ConnectX-4]
04:00.1 Infiniband controller: Mellanox Technologies MT27700 Family [ConnectX-4]
05:00.0 Ethernet controller: Mellanox Technologies MT27710 Family [ConnectX-4 Lx]
05:00.1 Ethernet controller: Mellanox Technologies MT27710 Family [ConnectX-4 Lx]

[root@rdma-virt-02 var]$ ibstatus
Infiniband device 'mlx5_0' port 1 status:
        default gid:     fe80:0000:0000:0000:e41d:2d03:00e7:0ff6
        base lid:        0x13
        sm lid:          0xd
        state:           4: ACTIVE
        phys state:      5: LinkUp
        rate:            56 Gb/sec (4X FDR)
        link_layer:      InfiniBand

Infiniband device 'mlx5_1' port 1 status:
        default gid:     fe80:0000:0000:0001:e41d:2d03:00e7:0ff7
        base lid:        0x26
        sm lid:          0x1
        state:           4: ACTIVE
        phys state:      5: LinkUp
        rate:            100 Gb/sec (4X EDR)
        link_layer:      InfiniBand

Infiniband device 'mlx5_bond_0' port 1 status:
        default gid:     fe80:0000:0000:0000:e61d:2dff:fefd:a72a
        base lid:        0x0
        sm lid:          0x0
        state:           4: ACTIVE
        phys state:      5: LinkUp
        rate:            25 Gb/sec (1X EDR)
        link_layer:      Ethernet





How reproducible:

100%

Steps to Reproduce:
1. Have RHEL8.4 is up booted, up and running in one of RDMA lab hosts - rdma-virt-02 in this case
2. run the following IB diag command

/usr/sbin/dump_fts -P 1


3.

Actual results:
Running python3 As root: 
TIME                            PID   UID   GID SIG COREFILE  EXE
Fri 2021-04-02 16:30:50 EDT   35026     0     0  11 present   /usr/sbin/dump_fts
total 72
-rw-r-----. 1 root root 66731 Apr  2 16:30 core.dump_fts.0.e2b000c7c8fb45baa1e1f29de0cd318f.35026.1617395450000000.lz4 <<<=======

b'Red Hat Enterprise Linux release 8.4 Beta (Ootpa)\n'

Firmware Bug, please contact your hardware vendor.
Apr 02 12:17:22 rdma-virt-02.lab.bos.redhat.com kernel: ACPI: [Firmware Bug]: BIOS _OSI(Linux) query ignored

Errors found during boot. Please check if it's a bug.
Errors found during boot. Please check if it's a bug.
Errors found during boot. Please check if it's a bug.
Errors found during boot. Please check if it's a bug.
Errors found during boot. Please check if it's a bug.
Errors found during boot. Please check if it's a bug.
Errors found during boot. Please check if it's a bug.
Errors found during boot. Please check if it's a bug.
Errors found during boot. Please check if it's a bug.
Errors found during boot. Please check if it's a bug.
Apr 02 12:17:23 rdma-virt-02.lab.bos.redhat.com kernel: ERST: Error Record Serialization Table (ERST) support is initialized.

Apr 02 16:17:33 rdma-virt-02.lab.bos.redhat.com kernel: ACPI Error: No handler for Region [SYSI] (00000000547761c4) [IPMI] (20200925/evregion-132)

Apr 02 16:17:33 rdma-virt-02.lab.bos.redhat.com kernel: ACPI Error: Region IPMI (ID=7) has no handler (20200925/exfldio-265)

Apr 02 16:17:33 rdma-virt-02.lab.bos.redhat.com kernel: ACPI Error: Aborting method \_SB.PMI0._GHL due to previous error (AE_NOT_EXIST) (20200925/psparse-531)

Apr 02 16:17:33 rdma-virt-02.lab.bos.redhat.com kernel: ACPI Error: Aborting method \_SB.PMI0._PMC due to previous error (AE_NOT_EXIST) (20200925/psparse-531)

Apr 02 16:17:33 rdma-virt-02.lab.bos.redhat.com kernel: ACPI Error: AE_NOT_EXIST, Evaluating _PMC (20200925/power_meter-756)

Apr 02 16:18:51 rdma-virt-02.lab.bos.redhat.com NetworkManager[1480]: <error> [1617394731.9644] platform-linux: sysctl: failed to set 'bonding/ad_actor_system' to '00:00:00:00:00:00': (22) Invalid argument

Apr 02 16:30:50 rdma-virt-02.lab.bos.redhat.com kernel: dump_fts[35026]: segfault at 20 ip 000055692c235b7c sp 00007ffda925a4c0 error 4 in dump_fts[55692c233000+8000] <<<=============================



Expected results:

Should have successfully run the command without any core dump


Additional info:


GDB core decode
===============

[root@rdma-virt-02 coredump]$ gdb /tmp/core.dump_fts.0.e2b000c7c8fb45baa1e1f29de0cd318f.35026.1617395450000000
GNU gdb (GDB) Red Hat Enterprise Linux 8.2-15.el8
Copyright (C) 2018 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
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There is NO WARRANTY, to the extent permitted by law.
Type "show copying" and "show warranty" for details.
This GDB was configured as "x86_64-redhat-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
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For help, type "help".
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[New LWP 35026]
Reading symbols from /usr/sbin/dump_fts...Reading symbols from /usr/lib/debug/usr/sbin/dump_fts-32.0-4.el8.x86_64.debug...done.
done.
Core was generated by `/usr/sbin/dump_fts -P 1'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  dump_lid (str_len=200, portguid=0x7ffda925a558, base_port_lid=<synthetic pointer>, 
    last_port_lid=<synthetic pointer>, fabric=0x55692cdbb720, valid=1, lid=33, 
    str=0x7ffda925a680 ": (Channel Adapter portguid 0x248a07030049d4f1: 'rdma-dev-21 mlx5_2')")
    at infiniband-diags/dump_fts.c:272
272             nodeguid = port->node->guid;
(gdb) where
#0  dump_lid (str_len=200, portguid=0x7ffda925a558, base_port_lid=<synthetic pointer>, 
    last_port_lid=<synthetic pointer>, fabric=0x55692cdbb720, valid=1, lid=33, 
    str=0x7ffda925a680 ": (Channel Adapter portguid 0x248a07030049d4f1: 'rdma-dev-21 mlx5_2')")
    at infiniband-diags/dump_fts.c:272
#1  dump_unicast_tables (node=0x55692cdc2b10, startl=0, endl=58, mad_port=0x55692cdc9ce0, 
    fabric=0x55692cdbb720) at infiniband-diags/dump_fts.c:366
#2  0x00007f7afb56abd0 in ibnd_iter_nodes_type (fabric=<optimized out>, 
    func=0x55692c236690 <process_switch>, node_type=<optimized out>, user_data=0x55692cdbb720)
    at libibnetdisc/ibnetdisc.c:930
#3  0x000055692c235577 in main (argc=<optimized out>, argv=<optimized out>)
    at infiniband-diags/dump_fts.c:481
(gdb)