bisecting fixing commit since c9fda4f22428e09728b611ec9100157199039bfe
building syzkaller on f39aff9e4a422297d30f25d0b53f0258a445fbee
testing commit c9fda4f22428e09728b611ec9100157199039bfe with gcc (GCC) 8.1.0
kernel signature: 81fb31e7604582762e9676bb4ee634706f8a9e8515792d9da4e61a4209846579
all runs: crashed: kernel BUG at arch/x86/kvm/mmu.c:LINE!
testing current HEAD a41ba30d9df20fe141c92aacbb56b6b077f19716
testing commit a41ba30d9df20fe141c92aacbb56b6b077f19716 with gcc (GCC) 8.1.0
kernel signature: 717942ea6cba318bcfb72b594608c48705c83c790d48878312fa8dffc95c5084
all runs: crashed: kernel BUG at arch/x86/kvm/mmu.c:LINE!
revisions tested: 2, total time: 23m2.74635697s (build: 16m13.699601676s, test: 6m15.006196516s)
the crash still happens on HEAD
commit msg: Linux 4.14.181
crash: kernel BUG at arch/x86/kvm/mmu.c:LINE!
L1TF CPU bug present and SMT on, data leak possible. See CVE-2018-3646 and https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/l1tf.html for details.
IPv6: ADDRCONF(NETDEV_UP): veth1_to_hsr: link is not ready
IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready
------------[ cut here ]------------
IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready
kernel BUG at arch/x86/kvm/mmu.c:3195!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 1 PID: 7134 Comm: syz-executor.0 Not tainted 4.14.181-syzkaller #0
IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff888090cae040 task.stack: ffff888083238000
IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready
RIP: 0010:transparent_hugepage_adjust+0x2db/0x3d0 arch/x86/kvm/mmu.c:3195
RSP: 0018:ffff88808323f738 EFLAGS: 00010202
RAX: 0000000000000003 RBX: ffff88808323f8d0 RCX: 0000000000000009
RDX: 0000000000000004 RSI: 0000000000000002 RDI: ffff888082100ad0
RBP: ffff88808323f778 R08: dffffc0000000000 R09: 1ffff11010420155
R10: 0000000000000050 R11: ffff888090cae040 R12: 0000000000088be1
R13: ffff88808323f890 R14: 0000000000088be3 R15: ffff8880831e0040
FS:  00007f11d3d7f700(0000) GS:ffff8880aef00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 00000000832ca000 CR4: 00000000001426e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
bridge0: port 1(bridge_slave_0) entered blocking state
 tdp_page_fault+0x359/0x510 arch/x86/kvm/mmu.c:4057
bridge0: port 1(bridge_slave_0) entered forwarding state
 kvm_mmu_page_fault+0xf8/0x2b0 arch/x86/kvm/mmu.c:5063
 handle_ept_violation+0x125/0x390 arch/x86/kvm/vmx.c:6912
 vmx_handle_exit+0x1b5/0x1160 arch/x86/kvm/vmx.c:9181
IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready
 vcpu_enter_guest+0xdef/0x4db0 arch/x86/kvm/x86.c:7316
 vcpu_run arch/x86/kvm/x86.c:7379 [inline]
 kvm_arch_vcpu_ioctl_run+0x257/0xeb0 arch/x86/kvm/x86.c:7546
IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready
 kvm_vcpu_ioctl+0x45e/0xb60 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2661
IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready
8021q: adding VLAN 0 to HW filter on device team0
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:500 [inline]
 do_vfs_ioctl+0x180/0xfb0 fs/ioctl.c:684
IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready
IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready
 SYSC_ioctl fs/ioctl.c:701 [inline]
 SyS_ioctl+0x74/0x80 fs/ioctl.c:692
IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready
 do_syscall_64+0x1c7/0x5b0 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x45a219
IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready
RSP: 002b:00007f11d3d7ec78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045a219
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000006
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f11d3d7f6d4
IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready
R13: 00000000004c38b2 R14: 00000000004d7b70 R15: 00000000ffffffff
Code: ea 03 0f b6 04 02 84 c0 74 08 3c 03 0f 8e ed 00 00 00 41 8b 
IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready
40 
IPv6: ADDRCONF(NETDEV_UP): veth0_to_hsr: link is not ready
18 c1 e8 1f e9 1a ff ff ff 48 89 df e8 5a c9 76 00 e9 5a fd ff ff <0f> 0b 
IPv6: ADDRCONF(NETDEV_UP): veth1_to_hsr: link is not ready
48 89 d7 4c 89 45 d0 e8 47 c9 76 00 4c 8b 45 d0 e9 84 fe 
RIP: transparent_hugepage_adjust+0x2db/0x3d0 arch/x86/kvm/mmu.c:3195 RSP: ffff88808323f738
---[ end trace 2253972ffed56a28 ]---
hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network