Ran into the same thing probably. More info here: https://bugzilla.redhat.com/show_bug.cgi?id=1965809 The oops: May 31 10:57:20 home07.rolf-en-monique.lan [ 40.085344] kernel BUG at block/bio.c:52! May 31 10:57:20 home07.rolf-en-monique.lan [ 40.085352] invalid opcode: 0000 [#1] SMP PTI May 31 10:57:20 home07.rolf-en-monique.lan [ 40.085355] CPU: 3 PID: 2829 Comm: Xorg Tainted: P OE 5.12.7-200.fc33.x86_64 #1 May 31 10:57:20 home07.rolf-en-monique.lan [ 40.085358] Hardware name: System manufacturer System Product Name/PRIME B250M-A, BIOS 0614 04/18/2017 May 31 10:57:20 home07.rolf-en-monique.lan [ 40.085360] RIP: 0010:biovec_slab.part.0+0x5/0x10 May 31 10:57:20 home07.rolf-en-monique.lan [ 40.085364] Code: b1 3a 04 00 48 83 3b 00 74 08 48 89 df e8 f3 fe ff ff 48 c7 03 00 00 00 00 5b c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 <0f> 0b 66 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 83 7f 40 00 75 May 31 10:57:20 home07.rolf-en-monique.lan [ 40.085366] RSP: 0000:ffffc0cc82a33780 EFLAGS: 00010212 May 31 10:57:20 home07.rolf-en-monique.lan [ 40.085369] RAX: 0000000000000081 RBX: ffffc0cc82a337b4 RCX: 00000000000000e8 May 31 10:57:20 home07.rolf-en-monique.lan [ 40.085370] RDX: 0000000000000800 RSI: ffffc0cc82a337b4 RDI: ffff9e060c300118 May 31 10:57:20 home07.rolf-en-monique.lan [ 40.085372] RBP: 0000000000000800 R08: ffff9e060c300118 R09: ffff9e060e5334d8 May 31 10:57:20 home07.rolf-en-monique.lan [ 40.085373] R10: ffff9e060e228570 R11: 0000000000000001 R12: ffff9e060c300118 May 31 10:57:20 home07.rolf-en-monique.lan [ 40.085375] R13: 0000000000000800 R14: 0000000000000800 R15: ffff9e060c3000d0 May 31 10:57:20 home07.rolf-en-monique.lan [ 40.085376] FS: 00007f7d034eaa80(0000) GS:ffff9e0926d80000(0000) knlGS:0000000000000000 May 31 10:57:20 home07.rolf-en-monique.lan [ 40.085378] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 May 31 10:57:20 home07.rolf-en-monique.lan [ 40.085380] CR2: 00007f7d0170ea4c CR3: 0000000118d5a006 CR4: 00000000003706e0 May 31 10:57:20 home07.rolf-en-monique.lan [ 40.085382] Call Trace: May 31 10:57:20 home07.rolf-en-monique.lan [ 40.085384] bvec_alloc+0x90/0xc0 May 31 10:57:20 home07.rolf-en-monique.lan [ 40.085388] bio_alloc_bioset+0x1b3/0x260 May 31 10:57:20 home07.rolf-en-monique.lan [ 40.085391] cached_dev_cache_miss+0xf6/0x2f0 [bcache] May 31 10:57:20 home07.rolf-en-monique.lan [ 40.085409] cache_lookup_fn+0xf2/0x2e0 [bcache] May 31 10:57:20 home07.rolf-en-monique.lan [ 40.085419] ? bch_btree_iter_next_filter+0x1ad/0x2e0 [bcache] May 31 10:57:20 home07.rolf-en-monique.lan [ 40.085427] ? bch_ptr_invalid+0x10/0x10 [bcache] May 31 10:57:20 home07.rolf-en-monique.lan [ 40.085435] ? bch_data_invalidate+0x160/0x160 [bcache] May 31 10:57:20 home07.rolf-en-monique.lan [ 40.085443] bch_btree_map_keys_recurse+0x70/0x170 [bcache] May 31 10:57:20 home07.rolf-en-monique.lan [ 40.085452] ? bch_btree_node_get.part.0+0x190/0x2c0 [bcache] May 31 10:57:20 home07.rolf-en-monique.lan [ 40.085460] ? rwsem_mark_wake+0x2a0/0x2a0 May 31 10:57:20 home07.rolf-en-monique.lan [ 40.085462] ? bch_data_invalidate+0x160/0x160 [bcache] May 31 10:57:20 home07.rolf-en-monique.lan [ 40.085471] bch_btree_map_keys_recurse+0xd7/0x170 [bcache] May 31 10:57:20 home07.rolf-en-monique.lan [ 40.085479] ? mempool_alloc+0x5b/0x150 May 31 10:57:20 home07.rolf-en-monique.lan [ 40.085540] bch_btree_map_keys+0x163/0x1b0 [bcache] May 31 10:57:20 home07.rolf-en-monique.lan [ 40.085548] ? bch_data_invalidate+0x160/0x160 [bcache] May 31 10:57:20 home07.rolf-en-monique.lan [ 40.085557] cache_lookup+0x93/0x140 [bcache] May 31 10:57:20 home07.rolf-en-monique.lan [ 40.085565] cached_dev_submit_bio+0x9f3/0xd60 [bcache] May 31 10:57:20 home07.rolf-en-monique.lan [ 40.085574] ? dm_submit_bio+0x187/0x3d0 May 31 10:57:20 home07.rolf-en-monique.lan [ 40.085577] ? blk_queue_enter+0x181/0x230 May 31 10:57:20 home07.rolf-en-monique.lan [ 40.085580] submit_bio_noacct+0x112/0x4d0 May 31 10:57:20 home07.rolf-en-monique.lan [ 40.085584] ext4_mpage_readpages+0x33f/0xb00 May 31 10:57:20 home07.rolf-en-monique.lan [ 40.085588] ? __mod_memcg_lruvec_state+0x22/0xe0 May 31 10:57:20 home07.rolf-en-monique.lan [ 40.085591] ? __add_to_page_cache_locked+0x1da/0x430 May 31 10:57:20 home07.rolf-en-monique.lan [ 40.085594] read_pages+0x5d/0x2c0 May 31 10:57:20 home07.rolf-en-monique.lan [ 40.085596] page_cache_ra_unbounded+0x1ab/0x230 May 31 10:57:20 home07.rolf-en-monique.lan [ 40.085599] filemap_fault+0x694/0xa60 May 31 10:57:20 home07.rolf-en-monique.lan [ 40.085602] ? __alloc_pages_nodemask+0x16c/0x340 May 31 10:57:20 home07.rolf-en-monique.lan [ 40.085606] ext4_filemap_fault+0x2d/0x40 May 31 10:57:20 home07.rolf-en-monique.lan [ 40.085608] __do_fault+0x36/0x100 May 31 10:57:20 home07.rolf-en-monique.lan [ 40.085611] __handle_mm_fault+0x6ca/0x15d0 May 31 10:57:20 home07.rolf-en-monique.lan [ 40.085614] handle_mm_fault+0xd5/0x2b0 May 31 10:57:20 home07.rolf-en-monique.lan [ 40.085616] do_user_addr_fault+0x1ba/0x690 May 31 10:57:20 home07.rolf-en-monique.lan [ 40.085619] ? ksys_mmap_pgoff+0x102/0x220 May 31 10:57:20 home07.rolf-en-monique.lan [ 40.085622] exc_page_fault+0x67/0x150 May 31 10:57:20 home07.rolf-en-monique.lan [ 40.085625] ? asm_exc_page_fault+0x8/0x30 May 31 10:57:20 home07.rolf-en-monique.lan [ 40.085642] asm_exc_page_fault+0x1e/0x30 May 31 10:57:20 home07.rolf-en-monique.lan [ 40.085644] RIP: 0033:0x7f7d04306ea3 May 31 10:57:20 home07.rolf-en-monique.lan [ 40.085646] Code: 0f 7f 44 17 f0 f3 0f 7f 07 c3 48 83 fa 40 77 16 f3 0f 7f 07 f3 0f 7f 47 10 f3 0f 7f 44 17 f0 f3 0f 7f 44 17 e0 c3 48 8d 4f 40 <f3> 0f 7f 07 48 83 e1 c0 f3 0f 7f 44 17 f0 f3 0f 7f 47 10 f3 0f 7f May 31 10:57:20 home07.rolf-en-monique.lan [ 40.085648] RSP: 002b:00007ffd525db8a8 EFLAGS: 00010206 May 31 10:57:20 home07.rolf-en-monique.lan [ 40.085650] RAX: 00007f7d0170ea4c RBX: 0000000000000002 RCX: 00007f7d0170ea8c May 31 10:57:20 home07.rolf-en-monique.lan [ 40.085652] RDX: 00000000000005b4 RSI: 0000000000000000 RDI: 00007f7d0170ea4c May 31 10:57:20 home07.rolf-en-monique.lan [ 40.085667] RBP: 00007ffd525dbb60 R08: 00007f7d0170ea4c R09: 00000000016f9000 May 31 10:57:20 home07.rolf-en-monique.lan [ 40.085669] R10: 0000000000000003 R11: 0000000000000206 R12: 0000559d50818840 May 31 10:57:20 home07.rolf-en-monique.lan [ 40.085670] R13: 00007ffd525db8e0 R14: 00007f7d0170f000 R15: 0000000000000000 May 31 10:57:20 home07.rolf-en-monique.lan [ 40.085673] Modules linked in: xt_CHECKSUM xt_MASQUERADE nf_nat_tftp nf_conntrack_tftp xt_CT tun bridge stp llc netconsole cfg80211 ip6t_REJECT nf_reject_ipv6 ip6t_rpfilter ipt_REJECT nf_reject_ipv4 xt_conntrack ebtable_nat ebtable_broute 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 nfnetlink ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter nct6775 hwmon_vid lm92 sunrpc nvidia_drm(POE) nvidia_modeset(POE) intel_rapl_msr intel_rapl_common raid1 uvcvideo x86_pkg_temp_thermal intel_powerclamp coretemp videobuf2_vmalloc ee1004 ppdev videobuf2_memops mei_hdcp videobuf2_v4l2 iTCO_wdt intel_pmc_bxt iTCO_vendor_support kvm_intel snd_usb_audio videobuf2_common kvm videodev snd_usbmidi_lib snd_hda_codec_realtek snd_hda_codec_generic snd_hda_codec_hdmi ledtrig_audio snd_rawmidi snd_hda_intel nvidia(POE) snd_intel_dspcfg snd_intel_sdw_acpi joydev mc May 31 10:57:20 home07.rolf-en-monique.lan [ 40.085710] irqbypass snd_hda_codec snd_hda_core rapl snd_hwdep intel_cstate snd_seq intel_uncore snd_seq_device eeepc_wmi asus_wmi snd_pcm sparse_keymap rfkill pcspkr wmi_bmof snd_timer i2c_i801 i2c_smbus drm_kms_helper snd cec soundcore parport_pc parport mei_me mei acpi_pad essiv authenc drm binfmt_misc ip_tables dm_crypt trusted raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx bcache crc64 mxm_wmi crct10dif_pclmul crc32_pclmul crc32c_intel ghash_clmulni_intel serio_raw nvme r8169 nvme_core wmi video fuse ecryptfs May 31 10:57:20 home07.rolf-en-monique.lan [ 40.085747] ---[ end trace 06c92d68c51b74c5 ]--- May 31 10:57:20 home07.rolf-en-monique.lan [ 40.085749] RIP: 0010:biovec_slab.part.0+0x5/0x10 May 31 10:57:20 home07.rolf-en-monique.lan [ 40.085752] Code: b1 3a 04 00 48 83 3b 00 74 08 48 89 df e8 f3 fe ff ff 48 c7 03 00 00 00 00 5b c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 <0f> 0b 66 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 83 7f 40 00 75 May 31 10:57:20 home07.rolf-en-monique.lan [ 40.085755] RSP: 0000:ffffc0cc82a33780 EFLAGS: 00010212 May 31 10:57:20 home07.rolf-en-monique.lan [ 40.085756] RAX: 0000000000000081 RBX: ffffc0cc82a337b4 RCX: 00000000000000e8 May 31 10:57:20 home07.rolf-en-monique.lan [ 40.085758] RDX: 0000000000000800 RSI: ffffc0cc82a337b4 RDI: ffff9e060c300118 May 31 10:57:20 home07.rolf-en-monique.lan [ 40.085759] RBP: 0000000000000800 R08: ffff9e060c300118 R09: ffff9e060e5334d8 May 31 10:57:20 home07.rolf-en-monique.lan [ 40.085761] R10: ffff9e060e228570 R11: 0000000000000001 R12: ffff9e060c300118 May 31 10:57:20 home07.rolf-en-monique.lan [ 40.085762] R13: 0000000000000800 R14: 0000000000000800 R15: ffff9e060c3000d0 May 31 10:57:20 home07.rolf-en-monique.lan [ 40.085764] FS: 00007f7d034eaa80(0000) GS:ffff9e0926d80000(0000) knlGS:0000000000000000 May 31 10:57:20 home07.rolf-en-monique.lan [ 40.085788] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 May 31 10:57:20 home07.rolf-en-monique.lan [ 40.085846] CR2: 00007f7d0170ea4c CR3: 0000000118d5a006 CR4: 00000000003706e0 On 5/25/21 11:04 PM, Giuseppe Della Bianca wrote: > Hi. > > On fedora 34 with 5.12.5-6 kernel version, kernel oops and panic on > booting when accessing the nvme cache device (I don't know a way to > report the many kernel messages, the system won't boot). > > Detaching the cache device from the bcache device, the system boot. > > gdb > >