bisecting fixing commit since fb683b5e3f53a73e761952735736180939a313df
building syzkaller on 08003f6440deafc4e193b159c4acece64f7864b1
testing commit fb683b5e3f53a73e761952735736180939a313df with gcc (GCC) 8.1.0
kernel signature: 6bbd60d760941400c60848ba86788e45f56095c0ba9a8770a108babbfc233f63
all runs: crashed: kernel BUG at arch/x86/kvm/mmu.c:LINE!
testing current HEAD 033c4ea49a4ba7a2b13aabf3ec755557924a9cda
testing commit 033c4ea49a4ba7a2b13aabf3ec755557924a9cda with gcc (GCC) 8.1.0
kernel signature: 05725b6ce248cfaee5eba7e3e54396dbf7307fcb24d346f61a00d1c3abe3b076
all runs: crashed: kernel BUG at arch/x86/kvm/mmu.c:LINE!
revisions tested: 2, total time: 25m46.978414381s (build: 18m46.213588814s, test: 5m53.744966976s)
the crash still happens on HEAD
commit msg: Linux 4.19.122
crash: kernel BUG at arch/x86/kvm/mmu.c:LINE!
IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready
bridge0: port 2(bridge_slave_1) entered blocking state
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bridge0: port 2(bridge_slave_1) entered forwarding state
kernel BUG at arch/x86/kvm/mmu.c:3279!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready
CPU: 0 PID: 7445 Comm: syz-executor.2 Not tainted 4.19.122-syzkaller #0
IPv6: ADDRCONF(NETDEV_UP): veth0_to_hsr: link is not ready
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:transparent_hugepage_adjust+0x337/0x420 arch/x86/kvm/mmu.c:3279
Code: ee 03 0f b6 04 06 84 c0 74 08 3c 03 0f 8e e4 00 00 00 8b 41 30 c1 e8 1f e9 03 ff ff ff 48 89 df e8 4e 13 84 00 e9 fe fc ff ff <0f> 0b 48 89 c7 48 89 55 c8 48 89 4d d0 e8 37 13 84 00 48 8b 55 c8
RSP: 0018:ffff8880950cf4e8 EFLAGS: 00010206
RAX: 0000000000000003 RBX: ffff8880950cf680 RCX: 0000000000000009
RDX: 0000000000000004 RSI: ffff888074f808c8 RDI: ffff888074f808f8
RBP: ffff8880950cf528 R08: ffff888074f8bcc8 R09: dffffc0000000000
R10: 1ffff1100e9f011a R11: ffff888074f8bccb R12: 0000000000095aa1
R13: 0000000000095aa3 R14: ffff888091d30040 R15: ffff8880950cf640
FS:  00007f1283747700(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 00000000922bf000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 tdp_page_fault+0x388/0x540 arch/x86/kvm/mmu.c:4196
 kvm_mmu_page_fault+0x163/0x1240 arch/x86/kvm/mmu.c:5342
 handle_ept_violation+0x16c/0x380 arch/x86/kvm/vmx.c:7683
 vmx_handle_exit+0x1b5/0x11b0 arch/x86/kvm/vmx.c:10165
IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready
IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready
IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready
 vcpu_enter_guest+0xd4b/0x50a0 arch/x86/kvm/x86.c:7854
IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready
IPv6: ADDRCONF(NETDEV_UP): veth0_to_hsr: link is not ready
IPv6: ADDRCONF(NETDEV_UP): veth1_to_hsr: link is not ready
hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network
 vcpu_run arch/x86/kvm/x86.c:7917 [inline]
 kvm_arch_vcpu_ioctl_run+0x2e9/0x1340 arch/x86/kvm/x86.c:8117
 kvm_vcpu_ioctl+0x535/0xb60 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2814
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:501 [inline]
 do_vfs_ioctl+0x196/0x10c0 fs/ioctl.c:688
 ksys_ioctl+0x62/0x90 fs/ioctl.c:705
 __do_sys_ioctl fs/ioctl.c:712 [inline]
 __se_sys_ioctl fs/ioctl.c:710 [inline]
 __x64_sys_ioctl+0x6e/0xb0 fs/ioctl.c:710
 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45a909
Code: ad b6 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 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network
RSP: 002b:00007f1283746c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045a909
IPv6: ADDRCONF(NETDEV_UP): vxcan0: link is not ready
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000006
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f12837476d4
R13: 00000000004c410f R14: 00000000004d9758 R15: 00000000ffffffff
Modules linked in:
---[ end trace 5c4bf997187d1a0d ]---
RIP: 0010:transparent_hugepage_adjust+0x337/0x420 arch/x86/kvm/mmu.c:3279
Code: ee 03 0f b6 04 06 84 c0 74 08 3c 03 0f 8e e4 00 00 00 8b 41 30 c1 e8 1f e9 03 ff ff ff 48 89 df e8 4e 13 84 00 e9 fe fc ff ff <0f> 0b 48 89 c7 48 89 55 c8 48 89 4d d0 e8 37 13 84 00 48 8b 55 c8
RSP: 0018:ffff8880950cf4e8 EFLAGS: 00010206
RAX: 0000000000000003 RBX: ffff8880950cf680 RCX: 0000000000000009
RDX: 0000000000000004 RSI: ffff888074f808c8 RDI: ffff888074f808f8
RBP: ffff8880950cf528 R08: ffff888074f8bcc8 R09: dffffc0000000000
R10: 1ffff1100e9f011a R11: ffff888074f8bccb R12: 0000000000095aa1
R13: 0000000000095aa3 R14: ffff888091d30040 R15: ffff8880950cf640
FS:  00007f1283747700(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 00000000922bf000 CR4: 00000000001426f0
IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
8021q: adding VLAN 0 to HW filter on device batadv0
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
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