Bionic / Testing ====== modified --------
$ uname -rv 4.15.0-110-generic #111+lp1867916.1 SMP Mon Jul 6 19:09:14 -03 2020 $ sudo make-bcache --bdev $DEV --block 8k [ 22.066760] bcache: bcache_device_init() bcache0: sb/logical block size (8192) greater than page size (4096) falling back to device logical block size (512) [ 22.070587] bcache: register_bdev() registered backing device loop0 original -------- $ uname -rv 4.15.0-110-generic #111-Ubuntu SMP Fri Jul 3 09:14:40 UTC 2020 $ sudo make-bcache --bdev $DEV --block 8k [ 16.457709] bcache: register_bdev() registered backing device loop0 [ 16.460954] BUG: unable to handle kernel NULL pointer dereference at 0000000000000008 [ 16.463150] IP: create_empty_buffers+0x29/0xf0 [ 16.464548] PGD 800000012aa90067 P4D 800000012aa90067 PUD 12aa91067 PMD 0 [ 16.466582] Oops: 0000 [#1] SMP PTI [ 16.467702] Modules linked in: bcache isofs kvm_intel kvm irqbypass joydev input_leds serio_raw ib_iser rdma_cm iw_cm ib_cm ib_core iscsi _tcp libiscsi_tcp libiscsi scsi_transport_iscsi autofs4 btrfs xor zstd_compress raid6_pq psmouse virtio_net virtio_blk floppy [ 16.472651] CPU: 0 PID: 1467 Comm: bcache-register Not tainted 4.15.0-110-generic #111-Ubuntu [ 16.474238] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1ubuntu1 04/01/2014 [ 16.475756] RIP: 0010:create_empty_buffers+0x29/0xf0 [ 16.476715] RSP: 0018:ffffa9a740abb838 EFLAGS: 00010246 [ 16.477745] RAX: 0000000000000000 RBX: ffffebd404aa77c0 RCX: 000000000000000d [ 16.479113] RDX: 0000000000000000 RSI: 0000000000002000 RDI: ffffebd404aa77c0 [ 16.480422] RBP: ffffa9a740abb850 R08: 0000000000026d60 R09: 0000000000000687 [ 16.481742] R10: 0000000000000002 R11: ffff91e6bffd2000 R12: 0000000000000000 [ 16.482976] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000200 [ 16.484304] FS: 00007f2c87adb700(0000) GS:ffff91e6bfc00000(0000) knlGS:0000000000000000 [ 16.485929] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 16.487084] CR2: 0000000000000008 CR3: 000000012a994000 CR4: 00000000000006f0 [ 16.488488] Call Trace: [ 16.489042] create_page_buffers+0x51/0x60 [ 16.489924] block_read_full_page+0x4e/0x3a0 [ 16.490820] ? set_init_blocksize+0x80/0x80 [ 16.491680] ? pagevec_lru_move_fn+0xc3/0xe0 [ 16.492560] ? __lru_cache_add+0x58/0x70 [ 16.493418] blkdev_readpage+0x18/0x20 [ 16.494219] do_read_cache_page+0x2a3/0x580 [ 16.495090] ? blkdev_writepages+0x40/0x40 [ 16.495937] ? __switch_to_asm+0x35/0x70 [ 16.496768] ? __switch_to_asm+0x41/0x70 [ 16.497611] ? __switch_to_asm+0x35/0x70 [ 16.498455] ? __switch_to_asm+0x41/0x70 [ 16.499297] read_cache_page+0x15/0x20 [ 16.500086] read_dev_sector+0x2d/0xe0 [ 16.500858] read_lba+0x130/0x220 [ 16.501603] ? kmem_cache_alloc_trace+0x15d/0x1d0 [ 16.502557] efi_partition+0x138/0x790 [ 16.503344] ? string+0x60/0x90 [ 16.504003] ? vsnprintf+0xfb/0x510 [ 16.504729] ? snprintf+0x45/0x70 [ 16.505436] ? is_gpt_valid.part.6+0x420/0x420 [ 16.506310] check_partition+0x130/0x230 [ 16.507116] ? is_gpt_valid.part.6+0x420/0x420 [ 16.508045] ? check_partition+0x130/0x230 [ 16.508891] rescan_partitions+0xaa/0x350 [ 16.509728] bdev_disk_changed+0x53/0x60 [ 16.510524] __blkdev_get+0x34a/0x510 [ 16.511283] blkdev_get+0x129/0x320 [ 16.511998] ? wake_up_bit+0x42/0x50 [ 16.512736] ? unlock_new_inode+0x4c/0x80 [ 16.513593] ? bdget+0x108/0x120 [ 16.514280] device_add_disk+0x38b/0x490 [ 16.515106] ? vprintk_default+0x29/0x50 [ 16.515939] bch_cached_dev_run.part.28+0x42/0x1a0 [bcache] [ 16.517033] register_bcache+0x8ab/0x1110 [bcache] [ 16.518012] ? __handle_mm_fault+0xf43/0x1290 [ 16.518869] kobj_attr_store+0x12/0x20 [ 16.519661] ? kobj_attr_store+0x12/0x20 [ 16.520449] sysfs_kf_write+0x3c/0x50 [ 16.521204] kernfs_fop_write+0x125/0x1a0 [ 16.522036] __vfs_write+0x1b/0x40 [ 16.522754] vfs_write+0xb1/0x1a0 [ 16.523458] SyS_write+0x5c/0xe0 [ 16.524176] do_syscall_64+0x73/0x130 [ 16.524933] entry_SYSCALL_64_after_hwframe+0x41/0xa6 [ 16.525919] RIP: 0033:0x7f2c875eb2c0 [ 16.526636] RSP: 002b:00007ffe51b11878 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 16.528107] RAX: ffffffffffffffda RBX: 000000000000000b RCX: 00007f2c875eb2c0 [ 16.529490] RDX: 000000000000000b RSI: 0000000000cdd010 RDI: 0000000000000003 [ 16.530829] RBP: 0000000000cdd010 R08: 0000000000000000 R09: 000000000000000b [ 16.532156] R10: 000000000000000a R11: 0000000000000246 R12: 000000000000000b [ 16.533487] R13: 0000000000000001 R14: 00007ffe51b118f0 R15: 0000000000000000 [ 16.534841] Code: 00 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 22 ff 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 08 48 [ 16.538311] RIP: create_empty_buffers+0x29/0xf0 RSP: ffffa9a740abb838 [ 16.539545] CR2: 0000000000000008 [ 16.540247] ---[ end trace 88ea84610b23a19a ]--- -- 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
