Disco / Testing ===== * Using the linux-hwe-5.0 from "Disco" (EOL) on Bionic for the 5.0 kernel.
modified -------- $ uname -rv 5.0.0-57-generic #61~18.04.1+lp1867916.1 SMP Mon Jul 6 19:27:05 -03 2020 $ sudo make-bcache --bdev $DEV --block 8k [ 109.818171] bcache: bcache_device_init() bcache0: sb/logical block size (8192) greater than page size (4096) falling back to device logical block size (512) [ 109.822055] bcache: register_bdev() registered backing device loop0 original -------- $ uname -rv 5.0.0-57-generic #61~18.04.1-Ubuntu SMP Mon Jul 6 09:40:52 UTC 2020 $ sudo make-bcache --bdev $DEV --block 8k [ 112.148300] bcache: register_bdev() registered backing device loop0 [ 112.150575] BUG: unable to handle kernel NULL pointer dereference at 0000000000000008 [ 112.153000] #PF error: [normal kernel read fault] [ 112.154474] PGD 800000012a5df067 P4D 800000012a5df067 PUD 137558067 PMD 0 [ 112.156614] Oops: 0000 [#1] SMP PTI [ 112.157742] CPU: 1 PID: 1649 Comm: bcache-register Not tainted 5.0.0-57-generic #61~18.04.1-Ubuntu [ 112.161386] RIP: 0010:create_empty_buffers+0x29/0x110 [ 112.162321] Code: 00 0f 1f 44 00 00 55 48 89 e5 41 55 41 54 53 49 89 d5 ba 01 00 00 00 48 89 fb e8 72 fe ff ff 49 89 c4 48 89 c2 eb 03 4$ 89 ca <48> 8b 4a 08 4c 09 2a 48 85 c9 75 f1 4c 89 62 08 48 8b 43 18 48 8d [ 112.165333] RSP: 0018:ffff9fac40dd77f8 EFLAGS: 00010286 [ 112.166198] RAX: 0000000000000000 RBX: ffffc8b744a73700 RCX: ffff9051b779d000 [ 112.167430] RDX: 0000000000000000 RSI: ffff9051b779d000 RDI: ffffc8b744a73700 [ 112.168767] RBP: ffff9fac40dd7810 R08: dead0000000000ff R09: 0000000000000003 [ 112.169992] R10: 0000000000000000 R11: 00003748bb58c8ff R12: 0000000000000000 [ 112.171515] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000200 [ 112.172649] FS: 00007f4344d58700(0000) GS:ffff9051bba80000(0000) knlGS:0000000000000000 [ 112.174052] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 112.175056] CR2: 0000000000000008 CR3: 0000000129e2a000 CR4: 00000000000006e0 [ 112.176259] Call Trace: [ 112.176773] create_page_buffers+0x52/0x60 [ 112.177525] block_read_full_page+0x4e/0x3c0 [ 112.178304] ? check_disk_change+0x70/0x70 [ 112.179098] ? count_shadow_nodes+0x130/0x130 [ 112.179881] blkdev_readpage+0x18/0x20 [ 112.180571] do_read_cache_page+0x37b/0x790 [ 112.181324] ? blkdev_writepages+0x10/0x10 [ 112.182064] ? get_page_from_freelist+0x154e/0x1560 [ 112.182924] ? update_load_avg+0x8b/0x5f0 [ 112.183657] read_cache_page+0x12/0x20 [ 112.184354] read_dev_sector+0x2d/0xe0 [ 112.185041] read_lba+0x130/0x220 [ 112.185665] efi_partition+0x131/0x770 [ 112.186360] ? string+0x60/0x90 [ 112.186971] ? vsnprintf+0xfb/0x510 [ 112.187625] ? snprintf+0x45/0x70 [ 112.188252] ? is_gpt_valid.part.7+0x420/0x420 [ 112.189056] check_partition+0x13f/0x250 [ 112.189759] ? is_gpt_valid.part.7+0x420/0x420 [ 112.190542] ? check_partition+0x13f/0x250 [ 112.191292] rescan_partitions+0xaf/0x360 [ 112.192015] bdev_disk_changed+0x5a/0x60 [ 112.192723] __blkdev_get+0x354/0x560 [ 112.193440] ? inode_init_always+0x131/0x1f0 [ 112.194365] blkdev_get+0x131/0x340 [ 112.195106] ? wake_up_bit+0x42/0x50 [ 112.195867] ? unlock_new_inode+0x4f/0x80 [ 112.196744] ? bdget+0x109/0x120 [ 112.197436] __device_add_disk+0x3d6/0x4f0 [ 112.198315] device_add_disk+0x13/0x20 [ 112.199132] bch_cached_dev_run.part.32+0x44/0x1b0 [bcache] [ 112.200248] register_bcache+0xa28/0x1120 [bcache] [ 112.201214] kobj_attr_store+0x12/0x20 [ 112.201977] ? kobj_attr_store+0x12/0x20 [ 112.202802] sysfs_kf_write+0x3c/0x50 [ 112.203584] kernfs_fop_write+0x13e/0x1c0 [ 112.204458] __vfs_write+0x1b/0x40 [ 112.205164] vfs_write+0xb1/0x1a0 [ 112.205860] ksys_write+0x5c/0xe0 [ 112.206578] __x64_sys_write+0x1a/0x20 [ 112.207388] do_syscall_64+0x5a/0x120 [ 112.208157] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 112.209206] RIP: 0033:0x7f43448682c0 [ 112.209956] Code: 73 01 c3 48 8b 0d d8 cb 2c 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 83 3d 89 24 2d 00 00 75 10 b8 01 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 fe dd 01 00 48 89 04 24 [ 112.213375] RSP: 002b:00007ffe6225fcf8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 112.214816] RAX: ffffffffffffffda RBX: 000000000000000b RCX: 00007f43448682c0 [ 112.216142] RDX: 000000000000000b RSI: 0000000000dc9010 RDI: 0000000000000003 [ 112.217477] RBP: 0000000000dc9010 R08: 0000000000000000 R09: 000000000000000b [ 112.218831] R10: 000000000000000a R11: 0000000000000246 R12: 000000000000000b [ 112.220143] R13: 0000000000000001 R14: 00007ffe6225fd70 R15: 0000000000000000 [ 112.221450] Modules linked in: bcache crc64 isofs kvm_intel kvm irqbypass input_leds joydev serio_raw ib_iser rdma_cm iw_cm ib_cm ib_core iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi autofs4 btrfs zstd_compress raid10 raid456 async_raid6_recov async_memcpy async_pq asy nc_xor async_tx xor raid6_pq libcrc32c raid1 raid0 multipath linear psmouse virtio_net net_failover virtio_blk failover floppy [ 112.227818] CR2: 0000000000000008 [ 112.228591] ---[ end trace c425c5c71d7443c3 ]--- [ 112.229535] RIP: 0010:create_empty_buffers+0x29/0x110 [ 112.230501] Code: 00 0f 1f 44 00 00 55 48 89 e5 41 55 41 54 53 49 89 d5 ba 01 00 00 00 48 89 fb e8 72 fe ff ff 49 89 c4 48 89 c2 eb 03 48 89 ca <48> 8b 4a 08 4c 09 2a 48 85 c9 75 f1 4c 89 62 08 48 8b 43 18 48 8d [ 112.233933] RSP: 0018:ffff9fac40dd77f8 EFLAGS: 00010286 [ 112.234912] RAX: 0000000000000000 RBX: ffffc8b744a73700 RCX: ffff9051b779d000 [ 112.236245] RDX: 0000000000000000 RSI: ffff9051b779d000 RDI: ffffc8b744a73700 [ 112.237589] RBP: ffff9fac40dd7810 R08: dead0000000000ff R09: 0000000000000003 [ 112.239009] R10: 0000000000000000 R11: 00003748bb58c8ff R12: 0000000000000000 [ 112.240337] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000200 [ 112.241646] FS: 00007f4344d58700(0000) GS:ffff9051bba80000(0000) knlGS:0000000000000000 [ 112.243230] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 112.244303] CR2: 0000000000000008 CR3: 0000000129e2a000 CR4: 00000000000006e0 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1867916 Title: Regression in kernel 4.15.0-91 causes kernel panic with Bcache To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1867916/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
