Backtrace

WARNING: CPU: 3 PID: 79665 at block/bfq-iosched.c:606 bfqq_request_over_limit+0x31f/0x380
Modules linked in: xt_nat veth nf_conntrack_netlink xt_addrtype br_netfilter overlay ppp_deflate bsd_comp ppp_async ppp_generic slhc rfcomm snd_seq_dummy snd_hrtimer xt_CHECKSUM xt_MASQUERADE xt_conntrack ipt_REJECT nf_nat_tftp nf_conntrack_tftp 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 nfnetlink ip6table_filter ip6_tables iptable_filter vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) bnep sunrpc vfat fat squashfs loop ee1004 mei_hdcp mei_pxp iTCO_wdt intel_pmc_bxt iTCO_vendor_support ath9k intel_rapl_msr ath9k_common ath3k ath9k_hw btusb btrtl intel_tcc_cooling btbcm btintel x86_pkg_temp_thermal intel_powerclamp uvcvideo btmtk coretemp snd_soc_skl
 videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 kvm_intel videobuf2_common snd_soc_hdac_hda bluetooth mac80211 videodev snd_hda_ext_core mc snd_soc_sst_ipc snd_soc_sst_dsp snd_hda_codec_hdmi snd_soc_acpi_intel_match kvm snd_soc_acpi snd_soc_core snd_hda_codec_realtek snd_hda_codec_generic ledtrig_audio snd_compress ac97_bus snd_pcm_dmaengine irqbypass libarc4 rapl snd_hda_intel ath intel_cstate snd_intel_dspcfg intel_uncore snd_intel_sdw_acpi ecdh_generic snd_hda_codec asus_nb_wmi asus_wmi snd_hda_core sparse_keymap snd_hwdep platform_profile cfg80211 wmi_bmof snd_seq snd_seq_device snd_pcm snd_timer snd pcspkr joydev i2c_i801 rfkill soundcore spi_pxa2xx_platform processor_thermal_device_pci_legacy i2c_smbus processor_thermal_device dw_dmac processor_thermal_rfim processor_thermal_mbox mei_me processor_thermal_rapl intel_rapl_common idma64 mei intel_xhci_usb_role_switch intel_soc_dts_iosf intel_pch_thermal int3403_thermal int340x_thermal_zone int3400_thermal asus_wireless
 acpi_thermal_rel acpi_pad zram ip_tables i915 i2c_algo_bit drm_kms_helper cec crct10dif_pclmul hid_multitouch ttm crc32_pclmul crc32c_intel drm ghash_clmulni_intel serio_raw i2c_hid_acpi wmi i2c_hid video pinctrl_sunrisepoint ipmi_devintf ipmi_msghandler fuse
CPU: 3 PID: 79665 Comm: ib_pg_flush_co Tainted: G        W  OE     5.17.4-100.fc34.x86_64 #1
Hardware name: ASUSTeK COMPUTER INC. VivoBook 14_ASUS Laptop X407UA/X407UA, BIOS X407UA.302 08/07/2018
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:ffffb0224668b9e0 EFLAGS: 00010006
RAX: 0000000000000003 RBX: 0000000000000018 RCX: ffffb0224668ba08
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000
RBP: ffff8f11893b4d80 R08: ffff8f1286fe8b60 R09: 0000000000000a00
R10: 0000000000001000 R11: 0000000000000801 R12: 0000000000000006
R13: 0000000000000002 R14: ffff8f132d19e098 R15: 0000000000000001
FS:  00007f0986d2c700(0000) GS:ffff8f13d6d80000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000292003b7018 CR3: 000000013438e003 CR4: 00000000003706e0
Call Trace:
 <TASK>
 ? _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
 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: 0033:0x7f09ab3f3a97
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:00007f0986d2b300 EFLAGS: 00000293 ORIG_RAX: 000000000000004a
RAX: ffffffffffffffda RBX: 000000000000000a RCX: 00007f09ab3f3a97
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000000000a
RBP: 00007f0986d2b540 R08: 0000000000000003 R09: 000055bf10f5f300
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 00007f0986d2b3e8 R14: 00007f0986d2b560 R15: 000000000000000a
 </TASK>