bad rip value; linux 5.4/ubuntu w/ tape drive

[stevecs]

Have a machine running ubuntu 20.04
#uname -a
Linux loki 5.4.0-54-generic #60-Ubuntu SMP Fri Nov 6 10:37:59 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux

mt-st --version

mt-st v. 1.3

commands being sent:
mt-st -f /dev/st0 rewind
mt-st -f /dev/st0 setblk 0
mt-st -f /dev/st0 defblksize 0
mt-st -f /dev/st0 defcompression 1
mt-st -f /dev/st0 compression 1
# dmesg happens with the weof command
mt-st -f /dev/st0 weof
mt-st -f /dev/st0 rewind

sending tape commands to external LTO6 tape drive; when writing eof to tape am getting bad rip values reported:

[145607.017412] INFO: task mt-st:1854856 blocked for more than 120 seconds.
[145607.017440] Tainted: P O 5.4.0-54-generic #60-Ubuntu
[145607.017460] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[145607.017483] mt-st D 0 1854856 1761783 0x00000000
[145607.017486] Call Trace:
[145607.017496] __schedule+0x2e3/0x740
[145607.017498] schedule+0x42/0xb0
[145607.017499] schedule_timeout+0x10e/0x160
[145607.017505] ? blk_mq_run_hw_queue+0x92/0x120
[145607.017506] wait_for_completion+0xb1/0x120
[145607.017510] ? wake_up_q+0x70/0x70
[145607.017515] st_do_scsi.constprop.0+0x37a/0x3f0 [st]
[145607.017517] st_int_ioctl+0x6ff/0xf70 [st]
[145607.017519] st_ioctl+0x37a/0xba0 [st]
[145607.017522] do_vfs_ioctl+0x407/0x670
[145607.017525] ? putname+0x4a/0x50
[145607.017526] ksys_ioctl+0x67/0x90
[145607.017527] __x64_sys_ioctl+0x1a/0x20
[145607.017530] do_syscall_64+0x57/0x190
[145607.017532] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[145607.017534] RIP: 0033:0x7f4714e7750b
[145607.017539] Code: Bad RIP value.
[145607.017540] RSP: 002b:00007ffcb0ee9758 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[145607.017541] RAX: ffffffffffffffda RBX: 0000556ccc5fb020 RCX: 00007f4714e7750b
[145607.017542] RDX: 00007ffcb0ee9770 RSI: 0000000040086d01 RDI: 0000000000000003
[145607.017543] RBP: 0000000000000003 R08: 0000000000000000 R09: 00007f4714f76d50
[145607.017543] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003
[145607.017544] R13: 0000000000000004 R14: 00007ffcb0ee99b8 R15: 0000000000000004

---

the EOF appears to be written and commands appear to complete however the above is being dumped to dmesg.

[digidax]

Same here:
hoste node

uname -a

Linux node234.domain.com 5.4.106-1-pve #1 SMP PVE 5.4.106-1 (Fri, 19 Mar 2021 11:08:47 +0100) x86_64 x86_64 x86_64 GNU/Linux (Proxmox Kernel, Debian 10)

Container (LXC): CentOS Linux release 8.3.2011

mt --version

mt-st v. 1.1

Tape drive: Quantum LTO-7 HH
Used Tape: Ultrium 7
SAS HBA: Microsemi 1100-4i, latest firmware

Task: mt -f /dev/st0 erase

[ 1451.195489] INFO: task mt:5821 blocked for more than 1208 seconds.
[ 1451.196881] Tainted: P O 5.4.106-1-pve #1
[ 1451.197671] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 1451.198454] mt D 0 5821 4093 0x00000324
[ 1451.199247] Call Trace:
[ 1451.200015] __schedule+0x2e6/0x700
[ 1451.200770] schedule+0x33/0xa0
[ 1451.201475] schedule_timeout+0x205/0x330
[ 1451.202114] ? __blk_mq_delay_run_hw_queue+0x14a/0x160
[ 1451.202766] ? blk_mq_run_hw_queue+0x90/0x120
[ 1451.203337] wait_for_completion+0xb7/0x140
[ 1451.203905] ? wake_up_q+0x80/0x80
[ 1451.204468] st_do_scsi.constprop.31+0x371/0x410 [st]
[ 1451.205036] ? page_add_file_rmap+0x131/0x190
[ 1451.205603] ? alloc_set_pte+0x104/0x5c0
[ 1451.206167] st_int_ioctl+0x5f8/0xf80 [st]
[ 1451.206730] st_ioctl+0x371/0x1810 [st]
[ 1451.207295] ? __seccomp_filter+0x31/0x6b0
[ 1451.207858] do_vfs_ioctl+0xa9/0x640
[ 1451.208421] ? __secure_computing+0x3e/0xd0
[ 1451.208983] ksys_ioctl+0x67/0x90
[ 1451.209544] __x64_sys_ioctl+0x1a/0x20
[ 1451.210105] do_syscall_64+0x57/0x190
[ 1451.210665] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 1451.211234] RIP: 0033:0x7f06e7b3188b
[ 1451.211805] Code: Bad RIP value.
[ 1451.212366] RSP: 002b:00007ffd7f8cd1f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[ 1451.212942] RAX: ffffffffffffffda RBX: 00005634116a3368 RCX: 00007f06e7b3188b
[ 1451.213524] RDX: 00007ffd7f8cd210 RSI: 0000000040086d01 RDI: 0000000000000003
[ 1451.214101] RBP: 00007ffd7f8cd3d8 R08: 00007ffd7f8ce841 R09: 0000000000000000
[ 1451.214672] R10: 00007f06e7bac9a0 R11: 0000000000000246 R12: 0000000000000003
[ 1451.215249] R13: 00007ffd7f8ce83a R14: 00007ffd7f8cd3b8 R15: 0000000000000005