ceph: device name is missing path (no : separator in /dev/loop6) watchdog: BUG: soft lockup - CPU#1 stuck for 123s! [syz-executor6:21199] Modules linked in: irq event stamp: 273576 hardirqs last enabled at (273575): [] trace_hardirqs_on_thunk+0x1a/0x1c hardirqs last disabled at (273576): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (0): [] copy_process+0x207e/0x7af0 kernel/fork.c:1813 softirqs last disabled at (0): [<0000000000000000>] (null) CPU: 1 PID: 21199 Comm: syz-executor6 Not tainted 4.19.0-rc1-next-20180831+ #53 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:csd_lock_wait kernel/smp.c:108 [inline] RIP: 0010:smp_call_function_single+0x3f5/0x5c0 kernel/smp.c:302 Code: 48 89 44 24 28 e8 eb 45 0c 00 45 85 e4 74 67 48 8b 44 24 28 48 83 c3 18 49 89 c4 e8 c5 44 0c 00 f3 90 48 89 d8 41 c6 04 24 04 <48> c1 e8 03 42 0f b6 04 28 84 c0 74 08 3c 03 0f 8e 35 01 00 00 41 RSP: 0018:ffff880191a77020 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: ffff880191a77098 RBX: ffff880191a77098 RCX: ffffc900058a9000 RDX: 0000000000040000 RSI: ffffffff8170832b RDI: 0000000000000005 RBP: ffff880191a77180 R08: ffff880190680440 R09: ffffed003b605b98 R10: ffffed003b605b98 R11: ffff8801db02dcc7 R12: ffffed003234ee20 R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000001 FS: 00007f61ee52f700(0000) GS:ffff8801db100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f61ee52edb8 CR3: 000000018a2f3000 CR4: 00000000001426e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: smp_call_function_many+0x884/0xa40 kernel/smp.c:434 native_flush_tlb_others+0xfe/0x5f0 arch/x86/mm/tlb.c:602 flush_tlb_others arch/x86/include/asm/paravirt.h:309 [inline] flush_tlb_mm_range+0x344/0x4e0 arch/x86/mm/tlb.c:651 tlb_flush_mmu_tlbonly include/asm-generic/tlb.h:147 [inline] tlb_flush_mmu mm/memory.c:257 [inline] arch_tlb_finish_mmu+0x338/0x540 mm/memory.c:273 tlb_finish_mmu+0x140/0x1f0 mm/memory.c:432 unmap_region+0x3ea/0x570 mm/mmap.c:2574 do_munmap+0x617/0xf60 mm/mmap.c:2781 mmap_region+0x78a/0x1c50 mm/mmap.c:1705 do_mmap+0xa10/0x1220 mm/mmap.c:1535 do_mmap_pgoff include/linux/mm.h:2298 [inline] do_shmat+0xe1d/0x10e0 ipc/shm.c:1534 __do_sys_shmat ipc/shm.c:1569 [inline] __se_sys_shmat ipc/shm.c:1564 [inline] __x64_sys_shmat+0xd7/0x1a0 ipc/shm.c:1564 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457099 Code: fd b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f61ee52ec78 EFLAGS: 00000246 ORIG_RAX: 000000000000001e RAX: ffffffffffffffda RBX: 00007f61ee52f6d4 RCX: 0000000000457099 RDX: 0000000000007000 RSI: 0000000020037000 RDI: 0000000000000000 RBP: 0000000000930140 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004d62d0 R14: 00000000004c9918 R15: 0000000000000001 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 21180 Comm: syz-executor6 Not tainted 4.19.0-rc1-next-20180831+ #53 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:get_current arch/x86/include/asm/current.h:15 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0xa/0x50 kernel/kcov.c:100 Code: 1b 49 83 c1 01 4a 89 7c 10 e0 4a 89 74 10 e8 4a 89 54 10 f0 4a 89 4c d8 20 4c 89 08 5d c3 66 90 55 65 48 8b 04 25 40 ee 01 00 <65> 8b 15 cf 25 85 7e 48 89 e5 81 e2 00 01 1f 00 48 8b 75 08 75 2b RSP: 0018:ffff88018ad26460 EFLAGS: 00000046 RAX: ffff880189856400 RBX: ffff880187ed0540 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff880187ed0540 RBP: ffff88018ad26508 R08: ffff880189856400 R09: fffff5200032fc47 R10: fffff5200032fc47 R11: ffffc9000197e23b R12: dffffc0000000000 R13: 1ffff100315a4c90 R14: ffff880187ed5d28 R15: ffff8801db02cc80 FS: 00007f61ee550700(0000) GS:ffff8801db000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020022000 CR3: 000000018a2f3000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: vmx_vcpu_put+0x34/0x50 arch/x86/kvm/vmx.c:3141 kvm_arch_vcpu_put+0x27c/0x420 arch/x86/kvm/x86.c:3182 kvm_sched_out+0x91/0xb0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3985 __fire_sched_out_preempt_notifiers kernel/sched/core.c:2497 [inline] fire_sched_out_preempt_notifiers kernel/sched/core.c:2505 [inline] prepare_task_switch kernel/sched/core.c:2611 [inline] context_switch kernel/sched/core.c:2790 [inline] __schedule+0xf1e/0x1df0 kernel/sched/core.c:3473 preempt_schedule_common+0x22/0x60 kernel/sched/core.c:3597 _cond_resched+0x1d/0x30 kernel/sched/core.c:4963 down_read+0x97/0x1d0 kernel/locking/rwsem.c:23 __do_page_fault+0xae1/0xe50 arch/x86/mm/fault.c:1331 do_page_fault+0xf6/0x7a4 arch/x86/mm/fault.c:1470 page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1164 RIP: 0010:raw_copy_from_user arch/x86/include/asm/uaccess_64.h:87 [inline] RIP: 0010:__copy_from_user include/linux/uaccess.h:75 [inline] RIP: 0010:paging32_walk_addr_generic+0x4e8/0x22c0 arch/x86/kvm/paging_tmpl.h:370 Code: c7 e0 b5 22 87 4c 03 a5 80 fc ff ff e8 c1 92 99 00 48 8b bd 70 fc ff ff be 04 00 00 00 e8 d0 04 a9 00 0f 1f 00 0f ae e8 31 db <41> 8b 04 24 89 85 d8 fc ff ff 0f 1f 00 31 ff 89 de e8 a2 fa 69 00 RSP: 0018:ffff88018ad26b88 EFLAGS: 00010246 RAX: 0000000000000004 RBX: 0000000000000000 RCX: ffffffff8112ce40 RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffff88018ad26c70 RBP: ffff88018ad26f98 R08: ffffed00315a4d8f R09: ffffed00315a4d8e R10: ffffed00315a4d8e R11: 0000000000000003 R12: 0000000020022000 R13: 0000000000004000 R14: ffff88018ad26fe0 R15: ffff88018ad26fd8 paging32_walk_addr arch/x86/kvm/paging_tmpl.h:483 [inline] paging32_gva_to_gpa+0xad/0x240 arch/x86/kvm/paging_tmpl.h:921 vcpu_mmio_gva_to_gpa arch/x86/kvm/x86.c:5035 [inline] emulator_read_write_onepage+0x3fa/0xf50 arch/x86/kvm/x86.c:5152 emulator_read_write+0x1b7/0x5a0 arch/x86/kvm/x86.c:5212 emulator_write_emulated+0x3c/0x50 arch/x86/kvm/x86.c:5249 segmented_write+0x119/0x190 arch/x86/kvm/emulate.c:1446 writeback+0x430/0x6d0 arch/x86/kvm/emulate.c:1808 x86_emulate_insn+0x1fc5/0x5010 arch/x86/kvm/emulate.c:5673 x86_emulate_instruction+0x67f/0x1e90 arch/x86/kvm/x86.c:6218 emulate_instruction arch/x86/include/asm/kvm_host.h:1250 [inline] complete_emulated_io arch/x86/kvm/x86.c:7737 [inline] complete_emulated_mmio+0x596/0x750 arch/x86/kvm/x86.c:7801 kvm_arch_vcpu_ioctl_run+0x12b4/0x16d0 arch/x86/kvm/x86.c:7861 kvm_vcpu_ioctl+0x7b8/0x1280 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2590 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0x1de/0x1720 fs/ioctl.c:685 ksys_ioctl+0xa9/0xd0 fs/ioctl.c:702 __do_sys_ioctl fs/ioctl.c:709 [inline] __se_sys_ioctl fs/ioctl.c:707 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:707 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457099 Code: fd b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f61ee54fc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f61ee5506d4 RCX: 0000000000457099 RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000007 RBP: 00000000009300a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004cf460 R14: 00000000004c5786 R15: 0000000000000000