System crash in mempool_alloc() while running parted on ASM (oracleadvm) device

Issue

• System crash in mempool_alloc() while running parted on asm device:

[17391.627789]  sdgz: sdgz3 sdgz8
[17391.634802]  sdhp: sdhp3 sdhp8
[17391.640578]  sdhq: sdhq3 sdhq8
[17391.643490] BUG: unable to handle kernel NULL pointer dereference at 0000000000000018
[17391.643861] IP: [<ffffffff9fbc163e>] mempool_alloc+0x5e/0x170
[17391.644056] PGD 800000284c4dd067 PUD 286c3f8067 PMD 0 
[17391.644272] Oops: 0000 [#1] SMP 
[17391.648628] CPU: 11 PID: 177225 Comm: parted Kdump: loaded Tainted: P        W  OE  ------------   3.10.0-1127.13.1.el7.x86_64 #1
[17391.649023] Hardware name: HP ProLiant DL380p Gen8, BIOS P70 05/24/2019
[17391.649219] task: ffff8ad96c521070 ti: ffff8ad91c67c000 task.ti: ffff8ad91c67c000
[17391.649602] RIP: 0010:[<ffffffff9fbc163e>]  [<ffffffff9fbc163e>] mempool_alloc+0x5e/0x170
[17391.650000] RSP: 0018:ffff8ad91c67f8d8  EFLAGS: 00010206
[17391.650185] RAX: ffff8ad91c67f8f0 RBX: 0000000000000030 RCX: ffff8ad91c67ffd8
[17391.650414] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
[17391.650599] RBP: ffff8ad91c67f948 R08: 0000000000000000 R09: 000000000001fd70
[17391.650798] R10: ffff8af8fffd9000 R11: 0000000000000000 R12: ffff8ad91c67f908
[17391.651003] R13: 0000000000011200 R14: 0000000000000000 R15: ffff8ad96c521070
[17391.651198] FS:  00007fb67084a880(0000) GS:ffff8af89ee40000(0000) knlGS:0000000000000000
[17391.651603] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[17391.651799] CR2: 0000000000000018 CR3: 000000284ccae000 CR4: 00000000001607e0
[17391.652018] Call Trace:
[17391.652223]  [<ffffffff9fc8b855>] ? bio_alloc_bioset+0x115/0x310
[17391.652433]  [<ffffffff9fc8a266>] ? __bio_clone+0x26/0x70
[17391.652618]  [<ffffffff9fc087f2>] blk_queue_bounce+0x1d2/0x2c0
[17391.652804]  [<ffffffff9fd560fe>] blk_queue_bio+0x3e/0x400
[17391.653022]  [<ffffffff9fd543f7>] generic_make_request+0x147/0x380
[17391.653218]  [<ffffffff9fc8d0b0>] ? set_init_blocksize+0x90/0x90
[17391.653415]  [<ffffffff9fd546a0>] submit_bio+0x70/0x150
[17391.653621]  [<ffffffff9fbbf037>] ? __add_to_page_cache_locked+0xc7/0x1a0
[17391.653806]  [<ffffffff9fc92a7a>] mpage_bio_submit+0x2a/0x40
[17391.654015]  [<ffffffff9fc93c1f>] mpage_readpages+0x13f/0x170
[17391.654220]  [<ffffffff9fc8d0b0>] ? set_init_blocksize+0x90/0x90
[17391.654439]  [<ffffffff9fc8d0b0>] ? set_init_blocksize+0x90/0x90
[17391.654624]  [<ffffffff9fc8d8ad>] blkdev_readpages+0x1d/0x20
[17391.654822]  [<ffffffff9fbcb67f>] __do_page_cache_readahead+0x1cf/0x260
[17391.655041]  [<ffffffff9fbcb82f>] ondemand_readahead+0x11f/0x240
[17391.655239]  [<ffffffff9fbcbc54>] page_cache_sync_readahead+0x44/0xb0
[17391.655437]  [<ffffffff9fbc0092>] generic_file_aio_read+0x2c2/0x790
[17391.655632]  [<ffffffff9fc8dcbc>] blkdev_aio_read+0x4c/0x70
[17391.655839]  [<ffffffff9fc8e58f>] ? __sync_blockdev+0x1f/0x40
[17391.656061]  [<ffffffff9fc4c5e3>] do_sync_read+0x93/0xe0
[17391.656268]  [<ffffffff9fc4d01f>] vfs_read+0x9f/0x170
[17391.656472]  [<ffffffff9fc4de8f>] SyS_read+0x7f/0xf0
[17391.656660]  [<ffffffffa0192ed2>] system_call_fastpath+0x25/0x2a
....
[17391.657719] RIP  [<ffffffff9fbc163e>] mempool_alloc+0x5e/0x170
....