Kernel panic on xfs_bmap_extents_to_btree() function

Issue

• Kernel panics on xfs_bmap_extents_to_btree() function

• Kernel ring buffer:

---[ end trace b369e44ad2458932 ]---
BUG: unable to handle kernel NULL pointer dereference at 0000000000000168
IP: [<ffffffffc05c4bfa>] xfs_bmap_extents_to_btree+0x21a/0x5c0 [xfs]
PGD 0 
Oops: 0002 [#1] SMP 
Modules linked in: nfsv3 binfmt_misc veth rpcsec_gss_krb5 nfsv4 nfs fscache nf_conntrack_netlink nfnetlink xt_statistic xt_nat xt_recent xt_mark xt_comment br_netfilter bridge stp llc rbd libceph dns_resolver ipt_REJECT nf_reject_ipv4 xt_conntrack iptable_filter ipt_MASQUERADE nf_nat_masquerade_ipv4 xt_addrtype iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack dm_thin_pool dm_persistent_data dm_bio_prison dm_bufio ppdev iosf_mbi crc32_pclmul ghash_clmulni_intel aesni_intel lrw gf128mul glue_helper ablk_helper cryptd joydev parport_pc virtio_balloon parport i2c_piix4 pcspkr nfsd auth_rpcgss nfs_acl lockd grace sunrpc ip_tables xfs libcrc32c virtio_net virtio_blk ata_generic pata_acpi cirrus drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops ttm drm
 ata_piix libata crct10dif_pclmul crct10dif_common crc32c_intel virtio_pci virtio_ring serio_raw i2c_core virtio floppy dm_mirror dm_region_hash dm_log dm_mod
CPU: 4 PID: 50240 Comm: redis-server Kdump: loaded Tainted: G        W      ------------   3.10.0-862.29.1.el7.x86_64 #1
Hardware name: Red Hat OpenStack Compute, BIOS 1.9.1-5.el7_3.3 04/01/2014
task: ffff9e3735dd8000 ti: ffff9e368f5a4000 task.ti: ffff9e368f5a4000
RIP: 0010:[<ffffffffc05c4bfa>]  [<ffffffffc05c4bfa>] xfs_bmap_extents_to_btree+0x21a/0x5c0 [xfs]
RSP: 0018:ffff9e368f5a7768  EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff9e61d02dd000 RCX: 0000000007309317
RDX: 0000000007309316 RSI: 0000000000000000 RDI: ffff9e343fd44d00
RBP: ffff9e368f5a7870 R08: 000000000001c2f0 R09: ffffffffc05fa7b7
R10: ffff9e913ef1c2f0 R11: fffffeb54a8a9300 R12: ffff9e589154d680
R13: ffff9e589154d640 R14: ffff9e368f5a7b40 R15: ffff9e5477fc56a8
FS:  00007f8415090f00(0000) GS:ffff9e913ef00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000168 CR3: 00000015e0eac000 CR4: 00000000003606e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 [<ffffffffc05ca0fe>] xfs_bmap_add_extent_delay_real+0x199e/0x1b80 [xfs]
 [<ffffffffc05cdde8>] xfs_bmapi_write+0x748/0xaa0 [xfs]
 [<ffffffffc060a2d5>] xfs_iomap_write_allocate+0x185/0x3a0 [xfs]
 [<ffffffffc05f45a6>] xfs_map_blocks+0x1a6/0x220 [xfs]
 [<ffffffffc05f59bc>] xfs_do_writepage+0x16c/0x510 [xfs]
 [<ffffffffa45a2b14>] write_cache_pages+0x254/0x4e0
 [<ffffffffc05f5850>] ? xfs_aops_discard_page+0x150/0x150 [xfs]
 [<ffffffffc05f565d>] xfs_vm_writepages+0xbd/0xe0 [xfs]
 [<ffffffffa45a3e91>] do_writepages+0x21/0x50
 [<ffffffffa4598705>] __filemap_fdatawrite_range+0x65/0x80
 [<ffffffffa4598851>] filemap_write_and_wait_range+0x41/0x90
 [<ffffffffc05ffaf6>] xfs_file_fsync+0x66/0x1e0 [xfs]
 [<ffffffffa46539e7>] do_fsync+0x67/0xb0
 [<ffffffffa4653cd0>] SyS_fsync+0x10/0x20
 [<ffffffffa4b2679b>] system_call_fastpath+0x22/0x27
Code: 01 00 00 01 e8 88 ac 06 00 48 8b 9d 48 ff ff ff 48 8b 95 78 ff ff ff 31 c9 4c 89 fe 48 89 df e8 8d cf 00 00 48 89 85 10 ff ff ff <48> c7 80 68 01 00 00 00 f3 63 c0 48 8b 80 a0 00 00 00 48 89 85 
RIP  [<ffffffffc05c4bfa>] xfs_bmap_extents_to_btree+0x21a/0x5c0 [xfs]
 RSP <ffff9e368f5a7768>