Backtrace

WARNING: CPU: 2 PID: 2525 at block/bfq-iosched.c:606 bfqq_request_over_limit+0x31f/0x380
Modules linked in: uinput rfcomm snd_seq_dummy snd_hrtimer xt_nat veth xt_conntrack xt_MASQUERADE nf_conntrack_netlink xt_addrtype br_netfilter bridge stp llc nft_objref nf_conntrack_netbios_ns nf_conntrack_broadcast nft_fib_inet nft_fib_ipv4 nft_fib_ipv6 nft_fib nft_reject_inet nf_reject_ipv4 nf_reject_ipv6 nft_reject nft_ct nft_chain_nat ip6table_nat ip6table_mangle ip6table_raw ip6table_security iptable_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 iptable_mangle iptable_raw iptable_security ip_set nf_tables overlay nfnetlink ip6table_filter ip6_tables iptable_filter bnep sunrpc squashfs loop intel_rapl_msr intel_rapl_common x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm at24 iTCO_wdt intel_pmc_bxt iTCO_vendor_support uvcvideo btusb btrtl btbcm irqbypass btintel videobuf2_vmalloc btmtk videobuf2_memops rapl intel_cstate videobuf2_v4l2 bluetooth intel_uncore videobuf2_common rtsx_usb_ms memstick wl(POE) snd_hda_codec_realtek videodev
 snd_hda_codec_generic snd_hda_codec_hdmi ledtrig_audio ecdh_generic snd_hda_intel mc snd_intel_dspcfg acer_wmi cfg80211 snd_intel_sdw_acpi pcspkr sparse_keymap joydev wmi_bmof snd_hda_codec snd_hda_core snd_hwdep snd_seq snd_seq_device mei_me snd_pcm i2c_i801 rfkill i2c_smbus snd_timer lpc_ich snd mei soundcore dw_dmac acpi_pad zram ip_tables i915 i2c_algo_bit drm_kms_helper cec hid_multitouch crct10dif_pclmul ttm crc32_pclmul crc32c_intel ghash_clmulni_intel drm serio_raw r8169 video wmi i2c_hid_acpi i2c_hid rtsx_usb_sdmmc mmc_core rtsx_usb ipmi_devintf ipmi_msghandler fuse
CPU: 2 PID: 2525 Comm: ib_pg_flush_co Tainted: P        W  OE     5.17.4-100.fc34.x86_64 #1
Hardware name: Acer Aspire ES1-571/Aspire ES1-571, BIOS V1.02 03/28/2016
RIP: 0010:bfqq_request_over_limit+0x31f/0x380
Code: 8b 7c 24 08 e8 52 77 bb ff 58 e8 1c 29 b2 ff 48 8d 5c 24 28 e9 ca fe ff ff 44 8b 6c 24 24 41 39 f5 0f 84 28 fe ff ff 41 89 f5 <0f> 0b e9 08 fe ff ff 4c 8d a4 24 a8 00 00 00 44 89 c1 be 10 00 00
RSP: 0018:ffffa88e04fa79e0 EFLAGS: 00010006
RAX: 0000000000000003 RBX: 0000000000000018 RCX: ffffa88e04fa7a08
RDX: 0000000000000000 RSI: 0000000000000002 RDI: ffff8c754bdbec30
RBP: ffff8c7643b84000 R08: ffff8c75473b4d00 R09: 0000000000000a00
R10: 0000000000010000 R11: ffffa88e04fa7b20 R12: 0000000000000006
R13: 0000000000000002 R14: ffff8c754bdbd898 R15: 0000000000000001
FS:  00007f0c55d2a700(0000) GS:ffff8c7696d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0c54335770 CR3: 00000001f52ec001 CR4: 00000000003706e0
Call Trace:
 <TASK>
 ? perf_trace_track_foreign_dirty+0x62/0x200
 ? _raw_spin_lock_irq+0x1a/0x40
 ? btrfs_add_ordered_sum+0x42/0x70
 ? btrfs_csum_one_bio+0x37a/0x460
 bfq_limit_depth+0x125/0x1d0
 __blk_mq_alloc_requests+0x23b/0x2a0
 blk_mq_submit_bio+0x3da/0x640
 submit_bio_noacct+0x232/0x280
 btrfs_map_bio+0x17c/0x490
 btrfs_submit_data_bio+0x10a/0x1f0
 submit_one_bio+0x44/0x70
 extent_writepages+0x9b/0x120
 do_writepages+0xbf/0x1b0
 ? fsnotify+0x5a5/0x650
 ? fsnotify+0x3bc/0x650
 filemap_fdatawrite_wbc+0x62/0x90
 filemap_fdatawrite_range+0x46/0x50
 start_ordered_ops.constprop.0+0x38/0x80
 btrfs_sync_file+0x7a/0x4b0
 __x64_sys_fsync+0x33/0x60
 do_syscall_64+0x3b/0x90
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f0c79db3a97
Code: 00 00 0f 05 48 3d 00 f0 ff ff 77 3f c3 66 0f 1f 44 00 00 53 89 fb 48 83 ec 10 e8 04 f7 ff ff 89 df 89 c2 b8 4a 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 2b 89 d7 89 44 24 0c e8 46 f7 ff ff 8b 44 24
RSP: 002b:00007f0c55d29320 EFLAGS: 00000293 ORIG_RAX: 000000000000004a
RAX: ffffffffffffffda RBX: 000000000000000a RCX: 00007f0c79db3a97
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000000000a
RBP: 00007f0c55d29560 R08: 0000000000000003 R09: 0000562da98cf400
R10: 0000000000010000 R11: 0000000000000293 R12: 0000000000000000
R13: 00007f0c55d29408 R14: 00007f0c55d29580 R15: 000000000000000a
 </TASK>