bisecting cause commit starting from 66745863ecdec7abbfc3325c2d917eecb739c069 building syzkaller on 6972b10616d785401dea17cec890cca8916424a7 testing commit 66745863ecdec7abbfc3325c2d917eecb739c069 compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.1 kernel signature: 147fa43e0267ab0de68ef58f4a9b5b7d801d384ca7a64a6cca76257c3f597dbf all runs: crashed: possible deadlock in dquot_commit testing release v5.13 testing commit 62fb9874f5da54fdb243003b386128037319b219 compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.1 kernel signature: eaab50170f966c8b3eb39852b91e95d9bc7e454d96827a490e5a435720d1ffbe all runs: crashed: possible deadlock in dquot_commit testing release v5.12 testing commit 9f4ad9e425a1d3b6a34617b8ea226d56a119a717 compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.1 kernel signature: a2c67d0aa4cd9031fb2dccc0e9429d13c38be324308c26aa1ef6b084265ddb79 all runs: crashed: possible deadlock in dquot_commit testing release v5.11 testing commit f40ddce88593482919761f74910f42f4b84c004b compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.1 kernel signature: 760afc9eb3d03287b34ea942b7a411382f5645571be3e022de43df2d69784b74 all runs: crashed: possible deadlock in dquot_commit testing release v5.10 testing commit 2c85ebc57b3e1817b6ce1a6b703928e113a90442 compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.1 kernel signature: ed87a01106570e960457a093defc61da2463f8df499a22d92a19e05b34bca040 all runs: crashed: possible deadlock in dquot_commit testing release v5.9 testing commit bbf5c979011a099af5dc76498918ed7df445635b compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.1 kernel signature: a6ff38e82dd9e7b72f8594f21d4456e9f130fed2d0baffe8f9a1ac831a8846b8 all runs: crashed: possible deadlock in dquot_commit testing release v5.8 testing commit bcf876870b95592b52519ed4aafcf9d95999bc9c compiler: gcc (GCC) 8.4.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.1 kernel signature: 148af9454d2419d8c534f359dc0ada77e2a0b73e26499bd1d569517b33bb77e1 all runs: crashed: possible deadlock in dquot_commit testing release v5.7 testing commit 3d77e6a8804abcc0504c904bd6e5cdf3a5cf8162 compiler: gcc version 8.4.1 20210217 (GCC), GNU ld (GNU Binutils for Debian) 2.35.1 kernel signature: c39813ac1b4cf9ee17cd9581d29834c9312d7a9e2d37c5149682cd29e326d445 all runs: crashed: possible deadlock in dquot_commit testing release v5.6 testing commit 7111951b8d4973bda27ff663f2cf18b663d15b48 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 65e9f41c1707ffe281e68adea77024db743fc3aec52e15a3092851b775aa1091 all runs: crashed: possible deadlock in dquot_commit testing release v5.5 testing commit d5226fa6dbae0569ee43ecfc08bdcd6770fc4755 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: df229a265ef77d7ea04c00e82025c3f1c0476396510a270bc6ec4e905f5dd17e all runs: crashed: possible deadlock in dquot_commit testing release v5.4 testing commit 219d54332a09e8d8741c1e1982f5eae56099de85 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 4db262e20e001154554aacba8ee069cf005e1d0d472bd35a6ff08601ed7ef2f2 all runs: crashed: possible deadlock in dquot_commit testing release v5.3 testing commit 4d856f72c10ecb060868ed10ff1b1453943fc6c8 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 8a03cb69477372e7c3f6c0fee23e5ea1b68880d5ca37439f59113cf3c4eda96e all runs: OK # git bisect start 219d54332a09e8d8741c1e1982f5eae56099de85 4d856f72c10ecb060868ed10ff1b1453943fc6c8 Bisecting: 7882 revisions left to test after this (roughly 13 steps) [a9f8b38a071b468276a243ea3ea5a0636e848cf2] Merge tag 'for-linus-5.4-1' of git://github.com/cminyard/linux-ipmi testing commit a9f8b38a071b468276a243ea3ea5a0636e848cf2 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: ceeaa8b0cfd529302ba500b7667f68e052337f4d182c21133fad9a5ec409b8b0 all runs: crashed: possible deadlock in dquot_commit # git bisect bad a9f8b38a071b468276a243ea3ea5a0636e848cf2 Bisecting: 3920 revisions left to test after this (roughly 12 steps) [fe38bd6862074c0a2b9be7f31f043aaa70b2af5f] Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm testing commit fe38bd6862074c0a2b9be7f31f043aaa70b2af5f compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 3d0d4a9da4bc7c928f19ca21482e2c6d6e64a677674bf2710088819cd7d655b2 run #0: crashed: WARNING: ODEBUG bug in netdev_freemem run #1: OK run #2: OK run #3: OK run #4: OK run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK reproducer seems to be flaky # git bisect bad fe38bd6862074c0a2b9be7f31f043aaa70b2af5f Bisecting: 1970 revisions left to test after this (roughly 11 steps) [fc6fd1392a8f3d5f3d722ad9c92314477c1a2a35] Merge branch 'x86-build-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip testing commit fc6fd1392a8f3d5f3d722ad9c92314477c1a2a35 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: e373d806f28bfbb66cbcdfb29000ac6c191d7d29a1e277419a3a9a9ca03df288 all runs: OK # git bisect good fc6fd1392a8f3d5f3d722ad9c92314477c1a2a35 Bisecting: 1254 revisions left to test after this (roughly 10 steps) [ea982ba7f79141d86eb7a440fcba6796ed718b9b] Merge tag 'mmc-v5.4' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc testing commit ea982ba7f79141d86eb7a440fcba6796ed718b9b compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 7a52bc2ba4602b2af1de67bba8e9d78dee0a42af97a1c2d88a4a64731cbd32bd all runs: OK # git bisect good ea982ba7f79141d86eb7a440fcba6796ed718b9b Bisecting: 713 revisions left to test after this (roughly 9 steps) [6ab8ad31601f29470eb895fd95e5c963e125aa1b] Merge tag 'sound-5.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound testing commit 6ab8ad31601f29470eb895fd95e5c963e125aa1b compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 2c0f9c1d604b40207f72313572ac5f517ece4e2bef7cfde45e5594074c16b379 all runs: OK # git bisect good 6ab8ad31601f29470eb895fd95e5c963e125aa1b Bisecting: 388 revisions left to test after this (roughly 9 steps) [e7345f92c27af003f219ad026d0e629a50b41e5c] Merge tag 'media/v5.4-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media testing commit e7345f92c27af003f219ad026d0e629a50b41e5c compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 9436580ee8e9849051578411df944fc0bf2849339fa0eb44d589457ff876f317 all runs: OK # git bisect good e7345f92c27af003f219ad026d0e629a50b41e5c Bisecting: 247 revisions left to test after this (roughly 8 steps) [fc6763a2d7e0a7f49ccec97a46e92e9fb1f3f9dd] Merge branches 'pm-opp', 'pm-qos', 'acpi-pm', 'pm-domains' and 'pm-tools' testing commit fc6763a2d7e0a7f49ccec97a46e92e9fb1f3f9dd compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 0193cd55e35c0aae8b9b40905b50256aa493471404263de17f7f335c2894d31d all runs: OK # git bisect good fc6763a2d7e0a7f49ccec97a46e92e9fb1f3f9dd Bisecting: 117 revisions left to test after this (roughly 7 steps) [04cbfba6208592999d7bfe6609ec01dc3fde73f5] Merge tag 'dmaengine-5.4-rc1' of git://git.infradead.org/users/vkoul/slave-dma testing commit 04cbfba6208592999d7bfe6609ec01dc3fde73f5 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 6baef3a1303acbe1bae37651e72c016df11c7bac1fa8178b15a7cec493edd872 all runs: OK # git bisect good 04cbfba6208592999d7bfe6609ec01dc3fde73f5 Bisecting: 58 revisions left to test after this (roughly 6 steps) [7396d337cfadc7c0b32dfd46581e9daff6666e84] KVM: x86: Return to userspace with internal error on unexpected exit reason testing commit 7396d337cfadc7c0b32dfd46581e9daff6666e84 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 72a3443b2df46a2f3383eb6b0cffbb69a4713fd21a2e14f568cc5f129be2d859 all runs: OK # git bisect good 7396d337cfadc7c0b32dfd46581e9daff6666e84 Bisecting: 30 revisions left to test after this (roughly 5 steps) [d2aaa49e281959828370667edbc1cdcc7fc4026a] Merge tag 'acpi-5.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm testing commit d2aaa49e281959828370667edbc1cdcc7fc4026a compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 530c80b272e8ed1c197116283a135cef5828d1ccea0de1fdab1304d6e4dcf1a3 all runs: OK # git bisect good d2aaa49e281959828370667edbc1cdcc7fc4026a Bisecting: 13 revisions left to test after this (roughly 4 steps) [17a81bdb4ee441bcbf09ec76f530197c3788d610] Merge tag 'kvm-s390-next-5.4-1' of git://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux into HEAD testing commit 17a81bdb4ee441bcbf09ec76f530197c3788d610 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 870d5310b2e97c3ff9979ef70da27a90677bd07298bb51feaa56c0981b01c868 all runs: OK # git bisect good 17a81bdb4ee441bcbf09ec76f530197c3788d610 Bisecting: 6 revisions left to test after this (roughly 3 steps) [016049a816774edc9c3cd81afa7724d7ab001585] software node: Initialize the return value in software_node_find_by_name() testing commit 016049a816774edc9c3cd81afa7724d7ab001585 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 9337f5710659da54f5614d622773cce9b5214ddde440e7fe1aa391d05e47551e all runs: OK # git bisect good 016049a816774edc9c3cd81afa7724d7ab001585 Bisecting: 3 revisions left to test after this (roughly 2 steps) [404e634fdb96a3c99c7517353bfafbd88e04ab41] Merge tag 'for-linus-urgent' of git://git.kernel.org/pub/scm/virt/kvm/kvm testing commit 404e634fdb96a3c99c7517353bfafbd88e04ab41 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 81ec281eaf9ef781e372c849f6455ad0730b2d27c375daf76e8dd83272094c11 all runs: OK # git bisect good 404e634fdb96a3c99c7517353bfafbd88e04ab41 Bisecting: 1 revision left to test after this (roughly 1 step) [4b9852f4f38909a9ca74e71afb35aafba0871aa1] KVM: x86: Fix INIT signal handling in various CPU states testing commit 4b9852f4f38909a9ca74e71afb35aafba0871aa1 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 6bf9d662b152527383035b7340968c7d3b00cf868a05bb4c899fecaa5d2c706e all runs: OK # git bisect good 4b9852f4f38909a9ca74e71afb35aafba0871aa1 Bisecting: 0 revisions left to test after this (roughly 0 steps) [fb3925d06c285e1acb248addc5d80b33ea771b0f] KVM: X86: Use IPI shorthands in kvm guest when support testing commit fb3925d06c285e1acb248addc5d80b33ea771b0f compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 9e169127462c3e058654bfd275722508743c84d5a037f96e78d7377464af45a3 all runs: OK # git bisect good fb3925d06c285e1acb248addc5d80b33ea771b0f fe38bd6862074c0a2b9be7f31f043aaa70b2af5f is the first bad commit commit fe38bd6862074c0a2b9be7f31f043aaa70b2af5f Merge: 404e634fdb96 fb3925d06c28 Author: Linus Torvalds Date: Wed Sep 18 09:49:13 2019 -0700 Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm Pull KVM updates from Paolo Bonzini: "s390: - ioctl hardening - selftests ARM: - ITS translation cache - support for 512 vCPUs - various cleanups and bugfixes PPC: - various minor fixes and preparation x86: - bugfixes all over the place (posted interrupts, SVM, emulation corner cases, blocked INIT) - some IPI optimizations" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (75 commits) KVM: X86: Use IPI shorthands in kvm guest when support KVM: x86: Fix INIT signal handling in various CPU states KVM: VMX: Introduce exit reason for receiving INIT signal on guest-mode KVM: VMX: Stop the preemption timer during vCPU reset KVM: LAPIC: Micro optimize IPI latency kvm: Nested KVM MMUs need PAE root too KVM: x86: set ctxt->have_exception in x86_decode_insn() KVM: x86: always stop emulation on page fault KVM: nVMX: trace nested VM-Enter failures detected by H/W KVM: nVMX: add tracepoint for failed nested VM-Enter x86: KVM: svm: Fix a check in nested_svm_vmrun() KVM: x86: Return to userspace with internal error on unexpected exit reason KVM: x86: Add kvm_emulate_{rd,wr}msr() to consolidate VXM/SVM code KVM: x86: Refactor up kvm_{g,s}et_msr() to simplify callers doc: kvm: Fix return description of KVM_SET_MSRS KVM: X86: Tune PLE Window tracepoint KVM: VMX: Change ple_window type to unsigned int KVM: X86: Remove tailing newline for tracepoints KVM: X86: Trace vcpu_id for vmexit KVM: x86: Manually calculate reserved bits when loading PDPTRS ... Documentation/virt/kvm/api.txt | 33 ++- Documentation/virt/kvm/mmu.txt | 4 +- arch/arm/include/uapi/asm/kvm.h | 4 +- arch/arm64/include/asm/pgtable-prot.h | 2 +- arch/arm64/include/uapi/asm/kvm.h | 4 +- arch/arm64/kvm/hyp/tlb.c | 14 +- arch/powerpc/include/asm/kvm_host.h | 22 +- arch/powerpc/include/asm/kvm_ppc.h | 1 + arch/powerpc/include/asm/xive.h | 9 + arch/powerpc/kvm/book3s.c | 8 +- arch/powerpc/kvm/book3s_hv.c | 24 +- arch/powerpc/kvm/book3s_hv_rm_mmu.c | 2 +- arch/powerpc/kvm/book3s_hv_rmhandlers.S | 38 ++- arch/powerpc/kvm/book3s_xive.c | 60 +++- arch/powerpc/kvm/book3s_xive.h | 2 + arch/powerpc/kvm/book3s_xive_native.c | 23 +- arch/powerpc/kvm/e500.c | 3 + arch/powerpc/kvm/emulate.c | 1 + arch/powerpc/kvm/emulate_loadstore.c | 6 - arch/powerpc/kvm/powerpc.c | 3 +- arch/powerpc/sysdev/xive/common.c | 87 ++++-- arch/powerpc/sysdev/xive/native.c | 7 + arch/s390/include/uapi/asm/kvm.h | 6 + arch/s390/kvm/kvm-s390.c | 6 +- arch/x86/include/asm/kvm_emulate.h | 3 +- arch/x86/include/asm/kvm_host.h | 19 +- arch/x86/include/asm/vmx.h | 14 + arch/x86/include/uapi/asm/vmx.h | 2 + arch/x86/kernel/kvm.c | 12 - arch/x86/kvm/cpuid.c | 27 +- arch/x86/kvm/emulate.c | 27 +- arch/x86/kvm/lapic.c | 20 +- arch/x86/kvm/mmu.c | 61 +++-- arch/x86/kvm/mmu.h | 2 +- arch/x86/kvm/svm.c | 198 +++++++------ arch/x86/kvm/trace.h | 74 +++-- arch/x86/kvm/vmx/nested.c | 305 +++++++++++---------- arch/x86/kvm/vmx/vmenter.S | 4 +- arch/x86/kvm/vmx/vmx.c | 94 +++---- arch/x86/kvm/vmx/vmx.h | 2 +- arch/x86/kvm/x86.c | 197 ++++++++----- arch/x86/kvm/x86.h | 2 +- include/kvm/arm_vgic.h | 4 +- include/uapi/linux/kvm.h | 3 + tools/testing/selftests/kvm/Makefile | 10 +- tools/testing/selftests/kvm/dirty_log_test.c | 61 ++++- tools/testing/selftests/kvm/include/kvm_util.h | 8 +- tools/testing/selftests/kvm/lib/aarch64/ucall.c | 112 ++++++++ tools/testing/selftests/kvm/lib/s390x/ucall.c | 56 ++++ tools/testing/selftests/kvm/lib/ucall.c | 157 ----------- tools/testing/selftests/kvm/lib/x86_64/ucall.c | 56 ++++ tools/testing/selftests/kvm/s390x/memop.c | 166 +++++++++++ tools/testing/selftests/kvm/s390x/sync_regs_test.c | 36 ++- virt/kvm/arm/arm.c | 2 + virt/kvm/arm/vgic/vgic-init.c | 8 +- virt/kvm/arm/vgic/vgic-irqfd.c | 36 ++- virt/kvm/arm/vgic/vgic-its.c | 207 ++++++++++++++ virt/kvm/arm/vgic/vgic-mmio-v3.c | 85 ++---- virt/kvm/arm/vgic/vgic-v2.c | 7 +- virt/kvm/arm/vgic/vgic-v3.c | 7 +- virt/kvm/arm/vgic/vgic.c | 26 +- virt/kvm/arm/vgic/vgic.h | 5 + virt/kvm/kvm_main.c | 7 +- 63 files changed, 1694 insertions(+), 797 deletions(-) create mode 100644 tools/testing/selftests/kvm/lib/aarch64/ucall.c create mode 100644 tools/testing/selftests/kvm/lib/s390x/ucall.c delete mode 100644 tools/testing/selftests/kvm/lib/ucall.c create mode 100644 tools/testing/selftests/kvm/lib/x86_64/ucall.c create mode 100644 tools/testing/selftests/kvm/s390x/memop.c Reproducer flagged being flaky revisions tested: 27, total time: 7h33m58.49274457s (build: 2h49m44.737710189s, test: 4h40m14.945468541s) first bad commit: fe38bd6862074c0a2b9be7f31f043aaa70b2af5f Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm recipients (to): ["linux-kernel@vger.kernel.org" "torvalds@linux-foundation.org"] recipients (cc): ["bp@alien8.de" "hpa@zytor.com" "jmattson@google.com" "joro@8bytes.org" "kvm@vger.kernel.org" "mingo@redhat.com" "pbonzini@redhat.com" "rkrcmar@redhat.com" "sean.j.christopherson@intel.com" "tglx@linutronix.de" "vkuznets@redhat.com" "wanpengli@tencent.com" "x86@kernel.org"] crash: WARNING: ODEBUG bug in netdev_freemem bond0 (unregistering): (slave bond_slave_0): Releasing backup interface bond0 (unregistering): Released all slaves ------------[ cut here ]------------ ODEBUG: free active (active state 0) object type: timer_list hint: delayed_work_timer_fn+0x0/0x90 kernel/workqueue.c:1595 WARNING: CPU: 0 PID: 3553 at lib/debugobjects.c:484 debug_print_object+0x19f/0x2a0 lib/debugobjects.c:481 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 3553 Comm: kworker/u4:5 Not tainted 5.3.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: netns cleanup_net Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x86/0xca lib/dump_stack.c:113 panic+0x29a/0x523 kernel/panic.c:219 __warn.cold.7+0x1b/0x36 kernel/panic.c:576 report_bug+0x1a1/0x200 lib/bug.c:186 fixup_bug arch/x86/kernel/traps.c:179 [inline] fixup_bug arch/x86/kernel/traps.c:174 [inline] do_error_trap+0x125/0x1d0 arch/x86/kernel/traps.c:272 do_invalid_op+0x36/0x40 arch/x86/kernel/traps.c:291 invalid_op+0x2d/0x40 arch/x86/entry/entry_64.S:1028 RIP: 0010:debug_print_object+0x19f/0x2a0 lib/debugobjects.c:481 Code: ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 d7 00 00 00 48 8b 14 dd 60 9f f8 8a 4c 89 f6 48 c7 c7 e0 3f d7 88 e8 68 75 bb fd <0f> 0b 83 05 1c 28 ef 08 01 48 83 c4 18 5b 41 5c 41 5d 41 5e 41 5f RSP: 0018:ffff8880ab7af850 EFLAGS: 00010286 RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 RDX: 0000000000000001 RSI: ffffffff89f03f80 RDI: ffffffff8d50d1a0 RBP: ffff8880ab7af890 R08: ffffed10173c96f9 R09: ffffed10173c96f9 R10: ffffed10173c96f8 R11: ffff8880b9e4b7c7 R12: 0000000000000001 R13: ffffffff8a4e5be0 R14: ffffffff88d74640 R15: ffffffff815ac070 __debug_check_no_obj_freed lib/debugobjects.c:963 [inline] debug_check_no_obj_freed+0x2cd/0x3fb lib/debugobjects.c:994 slab_free_hook mm/slub.c:1420 [inline] slab_free_freelist_hook mm/slub.c:1474 [inline] slab_free mm/slub.c:3016 [inline] kfree+0x24b/0x3b0 mm/slub.c:3957 kvfree+0x2c/0x30 mm/util.c:488 netdev_freemem+0x47/0x60 net/core/dev.c:9095 netdev_release+0x6c/0x90 net/core/net-sysfs.c:1635 device_release+0x6a/0x1c0 drivers/base/core.c:1076 kobject_cleanup lib/kobject.c:693 [inline] kobject_release lib/kobject.c:722 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x14f/0x410 lib/kobject.c:739 netdev_run_todo+0x468/0x6f0 net/core/dev.c:9000 rtnl_unlock+0x9/0x10 net/core/rtnetlink.c:112 default_device_exit_batch+0x2e9/0x3d0 net/core/dev.c:9783 ops_exit_list+0xd9/0x130 net/core/net_namespace.c:175 cleanup_net+0x42b/0x940 net/core/net_namespace.c:594 process_one_work+0x7d4/0x1620 kernel/workqueue.c:2269 worker_thread+0x85/0xb60 kernel/workqueue.c:2415 kthread+0x331/0x3f0 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 Kernel Offset: disabled Rebooting in 86400 seconds.. ---------------- Code disassembly (best guess), 1 bytes skipped: 0: df 48 89 fisttps -0x77(%rax) 3: fa cli 4: 48 c1 ea 03 shr $0x3,%rdx 8: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) c: 0f 85 d7 00 00 00 jne 0xe9 12: 48 8b 14 dd 60 9f f8 mov -0x750760a0(,%rbx,8),%rdx 19: 8a 1a: 4c 89 f6 mov %r14,%rsi 1d: 48 c7 c7 e0 3f d7 88 mov $0xffffffff88d73fe0,%rdi 24: e8 68 75 bb fd callq 0xfdbb7591 29: 0f 0b ud2 <-- trapping instruction 2b: 83 05 1c 28 ef 08 01 addl $0x1,0x8ef281c(%rip) # 0x8ef284e 32: 48 83 c4 18 add $0x18,%rsp 36: 5b pop %rbx 37: 41 5c pop %r12 39: 41 5d pop %r13 3b: 41 5e pop %r14 3d: 41 5f pop %r15