[ 576.133892] BUG: unable to handle kernel NULL pointer dereference at 0000000000000d38 [ 576.138839] IP: search_free+0x31/0x40 [bcache] [ 576.140848] PGD 0 P4D 0 [ 576.141559] Oops: 0000 [#1] SMP [ 576.142357] Modules linked in: bcache nls_utf8 isofs nls_iso8859_1 ppdev kvm_intel kvm irqbypass joydev input_leds parport_pc parport mac_hid serio_raw sch_fq_codel ib_iser rdma_cm iw_cm ib_cm ib_core iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi virtio_rng ip_tables x_tables autofs4 btrfs zstd_compress raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid1 raid0 multipath linear psmouse pata_acpi virtio_scsi virtio_net virtio_blk i2c_piix4 floppy [ 576.150770] CPU: 2 PID: 2072 Comm: kworker/2:53 Not tainted 4.15.0-041500rc1-generic #201808161524 [ 576.152454] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Ubuntu-1.8.2-1ubuntu1 04/01/2014 [ 576.154156] Workqueue: bcache bch_data_insert_keys [bcache] [ 576.155056] task: ffff95c039825700 task.stack: ffffb4e3811ac000 [ 576.156178] RIP: 0010:search_free+0x31/0x40 [bcache] [ 576.157150] RSP: 0018:ffffb4e3811afdf8 EFLAGS: 00010282 [ 576.158123] RAX: 0000000000000000 RBX: ffff95c023062ee0 RCX: 000000018010000a [ 576.159400] RDX: 000000018010000b RSI: fffffb21c0e73a80 RDI: ffff95c023062ee0 [ 576.160700] RBP: ffffb4e3811afe00 R08: ffff95c039cea200 R09: 000000018010000a [ 576.161882] R10: ffffb4e3811afd70 R11: ffff95c03ffb4000 R12: ffff95c026150010 [ 576.162981] R13: ffff95c023063068 R14: ffff95c03fd1b6c0 R15: ffff95c0377a7540 [ 576.164070] FS: 0000000000000000(0000) GS:ffff95c03fd00000(0000) knlGS:0000000000000000 [ 576.165559] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 576.166462] CR2: 0000000000000d38 CR3: 0000000027409000 CR4: 00000000000006e0 [ 576.167716] Call Trace: [ 576.168256] cached_dev_cache_miss_done+0x38/0x80 [bcache] [ 576.169275] closure_put+0x8b/0xc0 [bcache] [ 576.170021] closure_sub+0x6f/0xc0 [bcache] [ 576.170781] bch_data_insert_keys+0xd8/0x130 [bcache] [ 576.171670] process_one_work+0x1ea/0x410 [ 576.172402] worker_thread+0x32/0x410 [ 576.173013] kthread+0x11e/0x140 [ 576.173587] ? process_one_work+0x410/0x410 [ 576.174286] ? kthread_create_worker_on_cpu+0x70/0x70 [ 576.175152] ret_from_fork+0x1f/0x30 [ 576.175781] Code: 48 89 e5 53 48 89 fb e8 0e ff ff ff 48 8b bb 68 01 00 00 48 85 ff 74 05 e8 5d 5a aa c7 48 8b 83 e8 00 00 00 48 89 df 48 8b 40 70 <48> 8b b0 38 0d 00 00 e8 23 62 83 c7 5b 5d c3 0f 1f 44 00 00 55 [ 576.178708] RIP: search_free+0x31/0x40 [bcache] RSP: ffffb4e3811afdf8 [ 576.179821] CR2: 0000000000000d38 [ 576.180405] ---[ end trace ac54ba4aea6d80e6 ]--- [ 576.181290] BUG: unable to handle kernel NULL pointer dereference at 0000000000000d38 [ 576.182969] IP: search_free+0x31/0x40 [bcache] [ 576.183823] PGD 0 P4D 0 [ 576.184298] Oops: 0000 [#2] SMP [ 576.184938] Modules linked in: bcache nls_utf8 isofs nls_iso8859_1 ppdev kvm_intel kvm irqbypass joydev input_leds parport_pc parport mac_hid serio_raw sch_fq_codel ib_iser rdma_cm iw_cm ib_cm ib_core iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi virtio_rng ip_tables x_tables autofs4 btrfs zstd_compress raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid1 raid0 multipath linear psmouse pata_acpi virtio_scsi virtio_net virtio_blk i2c_piix4 floppy [ 576.193051] CPU: 2 PID: 2050 Comm: kworker/2:31 Tainted: G D 4.15.0-041500rc1-generic #201808161524 [ 576.194981] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Ubuntu-1.8.2-1ubuntu1 04/01/2014 [ 576.197033] Workqueue: bcache bch_data_insert_keys [bcache] [ 576.198487] task: ffff95c037718000 task.stack: ffffb4e3810fc000 [ 576.199877] RIP: 0010:search_free+0x31/0x40 [bcache] [ 576.201049] RSP: 0018:ffffb4e3810ffdf8 EFLAGS: 00010282 [ 576.202379] RAX: 0000000000000000 RBX: ffff95c023061770 RCX: 0000000180100009 [ 576.205112] RDX: 000000018010000a RSI: fffffb21c0e73a80 RDI: ffff95c023061770 [ 576.206700] RBP: ffffb4e3810ffe00 R08: ffff95c039cea700 R09: 0000000180100009 [ 576.208312] R10: ffffb4e3810ffd70 R11: ffff95c03ffb4000 R12: ffff95c026150010 [ 576.210061] R13: ffff95c0230618f8 R14: ffff95c03fd1b6c0 R15: ffff95c0377a8cc0 [ 576.211602] FS: 0000000000000000(0000) GS:ffff95c03fd00000(0000) knlGS:0000000000000000 [ 576.213236] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 576.214429] CR2: 0000000000000d38 CR3: 0000000027409000 CR4: 00000000000006e0 [ 576.215239] Call Trace: [ 576.215600] cached_dev_cache_miss_done+0x38/0x80 [bcache] [ 576.216251] closure_put+0x8b/0xc0 [bcache] [ 576.216796] closure_sub+0x6f/0xc0 [bcache] [ 576.217756] bch_data_insert_keys+0xd8/0x130 [bcache] [ 576.218879] process_one_work+0x1ea/0x410 [ 576.219792] worker_thread+0x32/0x410 [ 576.220637] kthread+0x11e/0x140 [ 576.221368] ? process_one_work+0x410/0x410 [ 576.221891] ? kthread_create_worker_on_cpu+0x70/0x70 [ 576.222500] ret_from_fork+0x1f/0x30 [ 576.222964] Code: 48 89 e5 53 48 89 fb e8 0e ff ff ff 48 8b bb 68 01 00 00 48 85 ff 74 05 e8 5d 5a aa c7 48 8b 83 e8 00 00 00 48 89 df 48 8b 40 70 <48> 8b b0 38 0d 00 00 e8 23 62 83 c7 5b 5d c3 0f 1f 44 00 00 55 [ 576.225130] RIP: search_free+0x31/0x40 [bcache] RSP: ffffb4e3810ffdf8 [ 576.225889] CR2: 0000000000000d38 [ 576.226325] ---[ end trace ac54ba4aea6d80e7 ]--- [ 576.226972] BUG: unable to handle kernel NULL pointer dereference at 0000000000000d38 [ 576.229413] IP: search_free+0x31/0x40 [bcache] [ 576.230422] PGD 0 P4D 0 [ 576.231047] Oops: 0000 [#3] SMP [ 576.231787] Modules linked in: bcache nls_utf8 isofs nls_iso8859_1 ppdev kvm_intel kvm irqbypass joydev input_leds parport_pc parport mac_hid serio_raw sch_fq_codel ib_iser rdma_cm iw_cm ib_cm ib_core iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi virtio_rng ip_tables x_tables autofs4 btrfs zstd_compress raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid1 raid0 multipath linear psmouse pata_acpi virtio_scsi virtio_net virtio_blk i2c_piix4 floppy [ 576.240806] CPU: 2 PID: 2269 Comm: kworker/2:250 Tainted: G D 4.15.0-041500rc1-generic #201808161524 [ 576.242149] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Ubuntu-1.8.2-1ubuntu1 04/01/2014 [ 576.243249] Workqueue: bcache bch_data_insert_keys [bcache] [ 576.243904] task: ffff95c0388fab80 task.stack: ffffb4e3817d4000 [ 576.244595] RIP: 0010:search_free+0x31/0x40 [bcache] [ 576.245604] RSP: 0018:ffffb4e3817d7df8 EFLAGS: 00010282 [ 576.246761] RAX: 0000000000000000 RBX: ffff95c023060bb8 RCX: 0000000180100007 [ 576.248295] RDX: 0000000180100008 RSI: fffffb21c0e73a80 RDI: ffff95c023060bb8 [ 576.249833] RBP: ffffb4e3817d7e00 R08: ffff95c039ceaf00 R09: 0000000180100007 [ 576.250986] R10: ffffb4e3817d7d70 R11: ffff95c03ffb4000 R12: ffff95c026150010 [ 576.251792] R13: ffff95c023060d40 R14: ffff95c03fd1b6c0 R15: ffff95c03779e180 [ 576.252597] FS: 0000000000000000(0000) GS:ffff95c03fd00000(0000) knlGS:0000000000000000 [ 576.254300] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 576.255350] CR2: 0000000000000d38 CR3: 0000000027409000 CR4: 00000000000006e0 [ 576.256468] Call Trace: [ 576.257062] cached_dev_cache_miss_done+0x38/0x80 [bcache] [ 576.258167] closure_put+0x8b/0xc0 [bcache] [ 576.258768] closure_sub+0x6f/0xc0 [bcache] [ 576.259330] bch_data_insert_keys+0xd8/0x130 [bcache] [ 576.260185] process_one_work+0x1ea/0x410 [ 576.260755] worker_thread+0x32/0x410 [ 576.261609] kthread+0x11e/0x140 [ 576.262412] ? process_one_work+0x410/0x410 [ 576.263405] ? kthread_create_worker_on_cpu+0x70/0x70 [ 576.264580] ret_from_fork+0x1f/0x30 [ 576.265384] Code: 48 89 e5 53 48 89 fb e8 0e ff ff ff 48 8b bb 68 01 00 00 48 85 ff 74 05 e8 5d 5a aa c7 48 8b 83 e8 00 00 00 48 89 df 48 8b 40 70 <48> 8b b0 38 0d 00 00 e8 23 62 83 c7 5b 5d c3 0f 1f 44 00 00 55 [ 576.267469] RIP: search_free+0x31/0x40 [bcache] RSP: ffffb4e3817d7df8 [ 576.268208] CR2: 0000000000000d38 [ 576.268644] ---[ end trace ac54ba4aea6d80e8 ]--- [ 576.269681] BUG: unable to handle kernel NULL pointer dereference at 0000000000000d38 [ 576.271702] IP: search_free+0x31/0x40 [bcache] [ 576.272716] PGD 0 P4D 0 [ 576.273362] Oops: 0000 [#4] SMP [ 576.275500] Modules linked in: bcache nls_utf8 isofs nls_iso8859_1 ppdev kvm_intel kvm irqbypass joydev input_leds parport_pc parport mac_hid serio_raw sch_fq_codel ib_iser rdma_cm iw_cm ib_cm ib_core iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi virtio_rng ip_tables x_tables autofs4 btrfs zstd_compress raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid1 raid0 multipath linear psmouse pata_acpi virtio_scsi virtio_net virtio_blk i2c_piix4 floppy [ 576.284044] CPU: 2 PID: 2246 Comm: kworker/2:227 Tainted: G D 4.15.0-041500rc1-generic #201808161524 [ 576.286247] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Ubuntu-1.8.2-1ubuntu1 04/01/2014 [ 576.288384] Workqueue: bcache bch_data_insert_keys [bcache] [ 576.289648] task: ffff95c0383f4140 task.stack: ffffb4e38171c000 [ 576.290967] RIP: 0010:search_free+0x31/0x40 [bcache] [ 576.292074] RSP: 0018:ffffb4e38171fdf8 EFLAGS: 00010282 [ 576.293793] RAX: 0000000000000000 RBX: ffff95c023060960 RCX: 0000000180100008 [ 576.295377] RDX: 0000000180100009 RSI: fffffb21c0a53dc0 RDI: ffff95c023060960 [ 576.296926] RBP: ffffb4e38171fe00 R08: ffff95c0294f7c00 R09: 0000000180100008 [ 576.297871] R10: ffffb4e38171fd70 R11: ffff95c03ffb4000 R12: ffff95c026150010 [ 576.299365] R13: ffff95c023060ae8 R14: ffff95c03fd1b6c0 R15: ffff95c03779f840 [ 576.300883] FS: 0000000000000000(0000) GS:ffff95c03fd00000(0000) knlGS:0000000000000000 [ 576.302825] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 576.304154] CR2: 0000000000000d38 CR3: 0000000027409000 CR4: 00000000000006e0 [ 576.305774] Call Trace: [ 576.306419] cached_dev_cache_miss_done+0x38/0x80 [bcache] [ 576.307692] closure_put+0x8b/0xc0 [bcache] [ 576.308704] closure_sub+0x6f/0xc0 [bcache] [ 576.309705] bch_data_insert_keys+0xd8/0x130 [bcache] [ 576.310892] process_one_work+0x1ea/0x410 [ 576.311849] worker_thread+0x32/0x410 [ 576.312743] kthread+0x11e/0x140 [ 576.313536] ? process_one_work+0x410/0x410 [ 576.314533] ? kthread_create_worker_on_cpu+0x70/0x70 [ 576.315708] ret_from_fork+0x1f/0x30 [ 576.316551] Code: 48 89 e5 53 48 89 fb e8 0e ff ff ff 48 8b bb 68 01 00 00 48 85 ff 74 05 e8 5d 5a aa c7 48 8b 83 e8 00 00 00 48 89 df 48 8b 40 70 <48> 8b b0 38 0d 00 00 e8 23 62 83 c7 5b 5d c3 0f 1f 44 00 00 55 [ 576.318745] RIP: search_free+0x31/0x40 [bcache] RSP: ffffb4e38171fdf8 [ 576.319490] CR2: 0000000000000d38 [ 576.319928] ---[ end trace ac54ba4aea6d80e9 ]--- [ 576.328838] bcache: cache_set_free() Cache set a0a27022-96aa-4c0a-abea-160ba355459f unregistered