invalid opcode in kvm_mmu_load
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syzbot
Jun 28, 2020, 7:21:14 AM6/28/20
to syzkaller-upst...@googlegroups.com
Hello,
syzbot found the following crash on:
HEAD commit: e7b08814 Add linux-next specific files for 20200529
git tree: linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=103c54f9100000
kernel config: https://syzkaller.appspot.com/x/.config?x=1e62421a5de6da96
dashboard link: https://syzkaller.appspot.com/bug?extid=d27f20d0eae3b00975a8
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
CC: [b...@alien8.de h...@zytor.com jmat...@google.com jo...@8bytes.org k...@vger.kernel.org linux-...@vger.kernel.org mi...@redhat.com pbon...@redhat.com sean.j.chr...@intel.com tg...@linutronix.de vkuz...@redhat.com wanp...@tencent.com x...@kernel.org]
Unfortunately, I don't have any reproducer for this crash yet.
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+d27f20...@syzkaller.appspotmail.com
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 9729 Comm: syz-executor.2 Not tainted 5.7.0-rc7-next-20200529-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:mmu_alloc_direct_roots arch/x86/kvm/mmu/mmu.c:3719 [inline]
RIP: 0010:mmu_alloc_roots arch/x86/kvm/mmu/mmu.c:3819 [inline]
RIP: 0010:kvm_mmu_load+0xbfa/0xe00 arch/x86/kvm/mmu/mmu.c:5152
Code: ac 23 99 00 48 8b 44 24 08 e9 cf f5 ff ff e8 6d 23 99 00 e9 b7 f4 ff ff 4c 89 f7 e8 90 23 99 00 e9 78 f4 ff ff e8 56 1a 5a 00 <0f> 0b 48 89 df e8 7c 23 99 00 e9 7e f8 ff ff e8 72 23 99 00 e9 c4
RSP: 0018:ffffc90016447b30 EFLAGS: 00010212
RAX: 0000000000040000 RBX: 0000000000000000 RCX: ffffc9000d94b000
RDX: 0000000000009cc5 RSI: ffffffff8118e14a RDI: 0000000000000001
RBP: ffff888088a70240 R08: ffff8880616d4380 R09: ffffed1015ce719c
R10: ffff8880ae738cdb R11: ffffed1015ce719b R12: 0000000000000000
R13: 0000000000000001 R14: ffff888088a70658 R15: 0000000000000000
FS: 00007f24b06a2700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2f025000 CR3: 000000009443d000 CR4: 00000000001426e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
kvm_mmu_reload arch/x86/kvm/mmu.h:81 [inline]
vcpu_enter_guest arch/x86/kvm/x86.c:8389 [inline]
vcpu_run arch/x86/kvm/x86.c:8600 [inline]
kvm_arch_vcpu_ioctl_run+0x4016/0x68d0 arch/x86/kvm/x86.c:8823
kvm_vcpu_ioctl+0x467/0xe10 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3147
vfs_ioctl fs/ioctl.c:48 [inline]
ksys_ioctl+0x11a/0x180 fs/ioctl.c:753
__do_sys_ioctl fs/ioctl.c:762 [inline]
__se_sys_ioctl fs/ioctl.c:760 [inline]
__x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:760
do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:359
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45ca59
Code: 0d b7 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 db b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f24b06a1c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00000000004e8780 RCX: 000000000045ca59
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005
RBP: 000000000078bfa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000000003d0 R14: 00000000004c67d2 R15: 00007f24b06a26d4
Modules linked in:
---[ end trace b4358393b05727a7 ]---
RIP: 0010:mmu_alloc_direct_roots arch/x86/kvm/mmu/mmu.c:3719 [inline]
RIP: 0010:mmu_alloc_roots arch/x86/kvm/mmu/mmu.c:3819 [inline]
RIP: 0010:kvm_mmu_load+0xbfa/0xe00 arch/x86/kvm/mmu/mmu.c:5152
Code: ac 23 99 00 48 8b 44 24 08 e9 cf f5 ff ff e8 6d 23 99 00 e9 b7 f4 ff ff 4c 89 f7 e8 90 23 99 00 e9 78 f4 ff ff e8 56 1a 5a 00 <0f> 0b 48 89 df e8 7c 23 99 00 e9 7e f8 ff ff e8 72 23 99 00 e9 c4
RSP: 0018:ffffc90016447b30 EFLAGS: 00010212
RAX: 0000000000040000 RBX: 0000000000000000 RCX: ffffc9000d94b000
RDX: 0000000000009cc5 RSI: ffffffff8118e14a RDI: 0000000000000001
RBP: ffff888088a70240 R08: ffff8880616d4380 R09: ffffed1015ce719c
R10: ffff8880ae738cdb R11: ffffed1015ce719b R12: 0000000000000000
R13: 0000000000000001 R14: ffff888088a70658 R15: 0000000000000000
FS: 00007f24b06a2700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000078c000 CR3: 000000009443d000 CR4: 00000000001426e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
---
This bug is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this bug report. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot found the following crash on:
HEAD commit: e7b08814 Add linux-next specific files for 20200529
git tree: linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=103c54f9100000
kernel config: https://syzkaller.appspot.com/x/.config?x=1e62421a5de6da96
dashboard link: https://syzkaller.appspot.com/bug?extid=d27f20d0eae3b00975a8
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
CC: [b...@alien8.de h...@zytor.com jmat...@google.com jo...@8bytes.org k...@vger.kernel.org linux-...@vger.kernel.org mi...@redhat.com pbon...@redhat.com sean.j.chr...@intel.com tg...@linutronix.de vkuz...@redhat.com wanp...@tencent.com x...@kernel.org]
Unfortunately, I don't have any reproducer for this crash yet.
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+d27f20...@syzkaller.appspotmail.com
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 9729 Comm: syz-executor.2 Not tainted 5.7.0-rc7-next-20200529-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:mmu_alloc_direct_roots arch/x86/kvm/mmu/mmu.c:3719 [inline]
RIP: 0010:mmu_alloc_roots arch/x86/kvm/mmu/mmu.c:3819 [inline]
RIP: 0010:kvm_mmu_load+0xbfa/0xe00 arch/x86/kvm/mmu/mmu.c:5152
Code: ac 23 99 00 48 8b 44 24 08 e9 cf f5 ff ff e8 6d 23 99 00 e9 b7 f4 ff ff 4c 89 f7 e8 90 23 99 00 e9 78 f4 ff ff e8 56 1a 5a 00 <0f> 0b 48 89 df e8 7c 23 99 00 e9 7e f8 ff ff e8 72 23 99 00 e9 c4
RSP: 0018:ffffc90016447b30 EFLAGS: 00010212
RAX: 0000000000040000 RBX: 0000000000000000 RCX: ffffc9000d94b000
RDX: 0000000000009cc5 RSI: ffffffff8118e14a RDI: 0000000000000001
RBP: ffff888088a70240 R08: ffff8880616d4380 R09: ffffed1015ce719c
R10: ffff8880ae738cdb R11: ffffed1015ce719b R12: 0000000000000000
R13: 0000000000000001 R14: ffff888088a70658 R15: 0000000000000000
FS: 00007f24b06a2700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2f025000 CR3: 000000009443d000 CR4: 00000000001426e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
kvm_mmu_reload arch/x86/kvm/mmu.h:81 [inline]
vcpu_enter_guest arch/x86/kvm/x86.c:8389 [inline]
vcpu_run arch/x86/kvm/x86.c:8600 [inline]
kvm_arch_vcpu_ioctl_run+0x4016/0x68d0 arch/x86/kvm/x86.c:8823
kvm_vcpu_ioctl+0x467/0xe10 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3147
vfs_ioctl fs/ioctl.c:48 [inline]
ksys_ioctl+0x11a/0x180 fs/ioctl.c:753
__do_sys_ioctl fs/ioctl.c:762 [inline]
__se_sys_ioctl fs/ioctl.c:760 [inline]
__x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:760
do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:359
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45ca59
Code: 0d b7 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 db b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f24b06a1c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00000000004e8780 RCX: 000000000045ca59
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005
RBP: 000000000078bfa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000000003d0 R14: 00000000004c67d2 R15: 00007f24b06a26d4
Modules linked in:
---[ end trace b4358393b05727a7 ]---
RIP: 0010:mmu_alloc_direct_roots arch/x86/kvm/mmu/mmu.c:3719 [inline]
RIP: 0010:mmu_alloc_roots arch/x86/kvm/mmu/mmu.c:3819 [inline]
RIP: 0010:kvm_mmu_load+0xbfa/0xe00 arch/x86/kvm/mmu/mmu.c:5152
Code: ac 23 99 00 48 8b 44 24 08 e9 cf f5 ff ff e8 6d 23 99 00 e9 b7 f4 ff ff 4c 89 f7 e8 90 23 99 00 e9 78 f4 ff ff e8 56 1a 5a 00 <0f> 0b 48 89 df e8 7c 23 99 00 e9 7e f8 ff ff e8 72 23 99 00 e9 c4
RSP: 0018:ffffc90016447b30 EFLAGS: 00010212
RAX: 0000000000040000 RBX: 0000000000000000 RCX: ffffc9000d94b000
RDX: 0000000000009cc5 RSI: ffffffff8118e14a RDI: 0000000000000001
RBP: ffff888088a70240 R08: ffff8880616d4380 R09: ffffed1015ce719c
R10: ffff8880ae738cdb R11: ffffed1015ce719b R12: 0000000000000000
R13: 0000000000000001 R14: ffff888088a70658 R15: 0000000000000000
FS: 00007f24b06a2700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000078c000 CR3: 000000009443d000 CR4: 00000000001426e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
---
This bug is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this bug report. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot
Aug 23, 2020, 7:45:10 AM8/23/20
to syzkaller-upst...@googlegroups.com
Auto-closing this bug as obsolete.
Crashes did not happen for a while, no reproducer and no activity.
Crashes did not happen for a while, no reproducer and no activity.
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