[linux-next] [FC/EXT4] [PPC] WARNING: CPU: 33 PID: 47869 at block/blk-lib.c:50 __blkdev_issue_discard+0x250/0x280

Greetings,

linux-next kernel 5.18.0-rc5-next-20220506 WARN_ON is triggered while 
running stress test on FC disk created with the EXT4 filesystem.

Console Logs :

  md127: detected capacity change from 0 to 62879744
  EXT4-fs (dm-11): mounted filesystem with ordered data mode. Quota 
mode: none.
  md127: detected capacity change from 62879744 to 0
  md: md127 stopped.
  EXT4-fs (dm-11): mounted filesystem with ordered data mode. Quota 
mode: none.
  md127: detected capacity change from 0 to 62879744
  WARNING: CPU: 33 PID: 47869 at block/blk-lib.c:50 
__blkdev_issue_discard+0x250/0x280
  Modules linked in: raid0 rpadlpar_io rpaphp nfnetlink tcp_diag 
udp_diag inet_diag unix_diag af_packet_diag netlink_diag bonding rfkill 
sunrpc pseries_rng xts vmx_crypto gf128mul sch_fq_codel binfmt_misc 
ip_tables ext4 mbcache jbd2 dm_round_robin sd_mod t10_pi crc64_rocksoft 
crc64 sg ibmvfc scsi_transport_fc ibmveth dm_multipath dm_mirror 
dm_region_hash dm_log dm_mod fuse
  CPU: 33 PID: 47869 Comm: mkfs.ext4 Kdump: loaded Not tainted 
5.18.0-rc5-next-20220506-autotest #1
  NIP:  c00000000064beb0 LR: c00000000064bf40 CTR: 0000000000000000
  REGS: c0000000a7a2f870 TRAP: 0700   Not tainted 
(5.18.0-rc5-next-20220506-autotest)
  MSR:  8000000000029033 <SF,EE,ME,IR,DR,RI,LE>  CR: 28002282  XER: 00000000
  CFAR: c00000000064bd24 IRQMASK: 0
  GPR00: c00000000064bf40 c0000000a7a2fb10 c0000000028cbd00 
c0000000ed960000
  GPR04: 0000000000000000 0000000000008000 0000000000000cc0 
c0000000a7a2fc28
  GPR08: 0000000000000000 c0000000c70a0000 00000000ffffffff 
0000000000000000
  GPR12: 0000000000002000 c0000018ff95ee80 0000000000000000 
0000000000000000
  GPR16: 0000000000000000 0000000000000000 000000000077ef00 
000000014e1e56a0
  GPR20: 0000000000008000 00007fff988b0588 00007ffff213dfe8 
0000000000000000
  GPR24: 0000000000000003 0000000000000000 0000000001000000 
c0000000ed960000
  GPR28: 0000000001000000 0000000000000000 c0000000ed960000 
c0000000ed960000
  NIP [c00000000064beb0] __blkdev_issue_discard+0x250/0x280
  LR [c00000000064bf40] blkdev_issue_discard+0x60/0xe0
  Call Trace:
  [c0000000a7a2fb10] [c0000000a7a2fb60] 0xc0000000a7a2fb60 (unreliable)
  [c0000000a7a2fbe0] [c00000000064bf40] blkdev_issue_discard+0x60/0xe0
  [c0000000a7a2fc70] [c00000000065e840] blkdev_common_ioctl+0x1b0/0xbf0
  [c0000000a7a2fd00] [c00000000065f6a8] blkdev_ioctl+0x428/0x6e0
  [c0000000a7a2fd60] [c0000000004857c8] sys_ioctl+0xf8/0x150
  [c0000000a7a2fdb0] [c00000000002f468] system_call_exception+0x178/0x380
  [c0000000a7a2fe10] [c00000000000c64c] system_call_common+0xec/0x250
  --- interrupt: c00 at 0x7fff98524480
  NIP:  00007fff98524480 LR: 00007fff98867828 CTR: 0000000000000000
  REGS: c0000000a7a2fe80 TRAP: 0c00   Not tainted 
(5.18.0-rc5-next-20220506-autotest)
  MSR:  800000000280f033 <SF,VEC,VSX,EE,PR,FP,ME,IR,DR,RI,LE>  CR: 
24002288  XER: 00000000
  IRQMASK: 0
  GPR00: 0000000000000036 00007ffff213dec0 00007fff98617100 
0000000000000003
  GPR04: 0000000020001277 00007ffff213df48 0000000001000000 
0000000000001000
  GPR08: 0000000000000003 0000000000000000 0000000000000000 
0000000000000000
  GPR12: 0000000000000000 00007fff9895ce40 0000000000000000 
0000000000000000
  GPR16: 0000000000000000 0000000000000000 000000000077ef00 
000000014e1e56a0
  GPR20: 0000000000008000 00007fff988b0588 00007ffff213dfe8 
0000000000000000
  GPR24: 000000011b2a0890 000000011b2a08a0 000000011b2a0880 
000000011b2a00d8
  GPR28: 0000000000000000 00007fff988b0590 000000011b2a00e0 
00007ffff213e0a0
  NIP [00007fff98524480] 0x7fff98524480
  LR [00007fff98867828] 0x7fff98867828
  --- interrupt: c00
  Instruction dump:
  60000000 2fa30000 419e0018 3c62fe6e 38810068 38630da0 4bb95b21 60000000
  3b20ffa1 4bffff60 60000000 60000000 <0fe00000> 7c0802a6 fb010090 fb4100a0
  ---[ end trace 0000000000000000 ]---


-- 
Regards,
Tasmiya Nalatwad
IBM Linux Technology Center