[19488.213488] ------------[ cut here ]------------
[19488.214427] WARNING: CPU: 3 PID: 3061788 at fs/super.c:1678 __sb_start_write+0x258/0x270
[19488.215856] Modules linked in: xfs dm_delay dm_zero ext2 dm_snapshot dm_thin_pool dm_persistent_data dm_bio_prison dm_bufio ext4 mbcache jbd2 btrfs blake2b_generic xor zstd_decompress zstd_compress lzo_compress lzo_decompress zlib_deflate raid6_pq dm_flakey libcrc32c ip6t_REJECT nf_reject_ipv6 ipt_REJECT nf_reject_ipv4 xt_REDIRECT ip_set_hash_ip ip_set_hash_net xt_tcpudp xt_set iptable_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 ip_set_hash_mac ip_set nfnetlink bfq ip6table_filter ip6_tables iptable_filter sch_fq_codel ip_tables x_tables overlay nfsv4 af_packet [last unloaded: scsi_debug]
[19488.226075] CPU: 3 PID: 3061788 Comm: fsstress Tainted: G        W         5.10.0-rc2-xfsx #rc2
[19488.228171] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.13.0-1ubuntu1 04/01/2014
[19488.231015] RIP: 0010:__sb_start_write+0x258/0x270
[19488.232231] Code: 00 00 00 45 31 c9 31 f6 b9 01 00 00 00 41 b8 01 00 00 00 ba 01 00 00 00 e8 d5 ca e2 ff 44 89 e8 59 5b 5d 41 5c 41 5d 41 5e c3 <0f> 0b 5b 44 89 e8 5d 41 5c 41 5d 41 5e c3 e8 cc 60 d5 ff e9 6a fe
[19488.237069] RSP: 0000:ffffc90001233d78 EFLAGS: 00010202
[19488.238354] RAX: 0000000080000000 RBX: ffff888056d99498 RCX: 0000000000000000
[19488.240106] RDX: 0000000000000001 RSI: ffffffff81068310 RDI: 00000000ffffffff
[19488.242766] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
[19488.244557] R10: 0000000000000200 R11: 61c8864680b583eb R12: 0000000000000001
[19488.247028] R13: 0000000000000000 R14: ffff888056d99578 R15: fff000003fffffff
[19488.248573] FS:  00007f3571890740(0000) GS:ffff88807e000000(0000) knlGS:0000000000000000
[19488.250903] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[19488.252153] CR2: 00007f5894b6a02f CR3: 000000001e252003 CR4: 00000000001706a0
[19488.254215] Call Trace:
[19488.254943]  __xfs_filemap_fault+0x14c/0x280 [xfs]
[19488.256102]  ? __xfs_filemap_fault+0x8f/0x280 [xfs]
[19488.257956]  do_page_mkwrite+0x50/0xc0
[19488.259183]  ? __do_fault+0x32/0xa0
[19488.260472]  handle_mm_fault+0xd11/0x1a50
[19488.262322]  ? lock_acquire+0x192/0x430
[19488.264320]  do_user_addr_fault+0x1cf/0x3a0
[19488.265472]  ? _copy_to_user+0x67/0x80
[19488.266467]  exc_page_fault+0x6f/0x250
[19488.267261]  ? asm_exc_page_fault+0x5/0x20
[19488.268182]  asm_exc_page_fault+0x1b/0x20
[19488.269537] RIP: 0033:0x7f3571a21ad1
[19488.270564] Code: 01 00 00 48 83 fa 40 77 77 c5 fe 7f 44 17 e0 c5 fe 7f 07 c5 f8 77 c3 66 90 f3 0f 1e fa c5 f8 77 48 89 d1 40 0f b6 c6 48 89 fa <f3> aa 48 89 d0 c3 66 0f 1f 84 00 00 00 00 00 f3 0f 1e fa 48 39 d1
[19488.273827] RSP: 002b:00007ffe63218508 EFLAGS: 00010202
[19488.274824] RAX: 0000000000000077 RBX: 0000000000019e3b RCX: 0000000000019e3b
[19488.276097] RDX: 00007f3571876000 RSI: 0000000000000077 RDI: 00007f3571876000
[19488.277374] RBP: 0000000000073000 R08: 0000000000000000 R09: 0000000000073000
[19488.278650] R10: 0000000000000008 R11: 0000000000000246 R12: 000000000000024e
[19488.279905] R13: 00007ffe63218b80 R14: 00007ffe63218c16 R15: 000055a56ee97950