From: syzbot <syzbot+23786faffb695f17edaa@syzkaller.appspotmail.com>
To: bp@alien8.de, dave.hansen@linux.intel.com, hpa@zytor.com,
kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
mingo@redhat.com, pbonzini@redhat.com, seanjc@google.com,
syzkaller-bugs@googlegroups.com, tglx@linutronix.de,
x86@kernel.org
Subject: [syzbot] [kvm?] general protection fault in is_page_fault_stale
Date: Mon, 22 Jul 2024 07:53:27 -0700 [thread overview]
Message-ID: <0000000000002b84dc061dd73544@google.com> (raw)
Hello,
syzbot found the following issue on:
HEAD commit: 2c9b3512402e Merge tag 'for-linus' of git://git.kernel.org..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=17abcfe9980000
kernel config: https://syzkaller.appspot.com/x/.config?x=e322acd9c27a6b84
dashboard link: https://syzkaller.appspot.com/bug?extid=23786faffb695f17edaa
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
userspace arch: i386
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/c112a5c3b199/disk-2c9b3512.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/d0dae74e61d2/vmlinux-2c9b3512.xz
kernel image: https://storage.googleapis.com/syzbot-assets/54648874d89c/bzImage-2c9b3512.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+23786faffb695f17edaa@syzkaller.appspotmail.com
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
</TASK>
Oops: general protection fault, probably for non-canonical address 0xe000013ffffffffd: 0000 [#1] PREEMPT SMP KASAN PTI
KASAN: maybe wild-memory-access in range [0x000029ffffffffe8-0x000029ffffffffef]
CPU: 0 PID: 11829 Comm: syz.1.1799 Not tainted 6.10.0-syzkaller-11185-g2c9b3512402e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
RIP: 0010:to_shadow_page arch/x86/kvm/mmu/spte.h:245 [inline]
RIP: 0010:spte_to_child_sp arch/x86/kvm/mmu/spte.h:250 [inline]
RIP: 0010:root_to_sp arch/x86/kvm/mmu/spte.h:267 [inline]
RIP: 0010:is_page_fault_stale+0xc4/0x530 arch/x86/kvm/mmu/mmu.c:4517
Code: e9 00 01 00 00 48 b8 ff ff ff ff ff 00 00 00 48 21 c3 48 c1 e3 06 49 bc 28 00 00 00 00 ea ff ff 49 01 dc 4c 89 e0 48 c1 e8 03 <42> 80 3c 28 00 74 08 4c 89 e7 e8 6d b7 d8 00 4d 8b 2c 24 31 ff 4c
RSP: 0018:ffffc9000fc6f6f0 EFLAGS: 00010202
RAX: 0000053ffffffffd RBX: 00003fffffffffc0 RCX: ffff88806a8bda00
RDX: 0000000000000000 RSI: 000fffffffffffff RDI: 00000000000129d3
RBP: 00000000000129d3 R08: ffffffff8120c8e0 R09: 1ffff920005e6c00
R10: dffffc0000000000 R11: fffff520005e6c01 R12: 000029ffffffffe8
R13: dffffc0000000000 R14: ffffc9000fc6f800 R15: ffff88807cbed000
FS: 0000000000000000(0000) GS:ffff8880b9400000(0063) knlGS:00000000f5d46b40
CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00000000576d24c0 CR3: 000000007d930000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
kvm_tdp_mmu_page_fault arch/x86/kvm/mmu/mmu.c:4662 [inline]
kvm_tdp_page_fault+0x25c/0x320 arch/x86/kvm/mmu/mmu.c:4693
kvm_mmu_do_page_fault+0x589/0xca0 arch/x86/kvm/mmu/mmu_internal.h:323
kvm_tdp_map_page arch/x86/kvm/mmu/mmu.c:4715 [inline]
kvm_arch_vcpu_pre_fault_memory+0x2db/0x5a0 arch/x86/kvm/mmu/mmu.c:4760
kvm_vcpu_pre_fault_memory+0x24c/0x4b0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:4418
kvm_vcpu_ioctl+0xa47/0xea0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:4648
kvm_vcpu_compat_ioctl+0x242/0x450 arch/x86/kvm/../../../virt/kvm/kvm_main.c:4700
__do_compat_sys_ioctl fs/ioctl.c:1007 [inline]
__se_compat_sys_ioctl+0x51c/0xca0 fs/ioctl.c:950
do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
__do_fast_syscall_32+0xb4/0x110 arch/x86/entry/common.c:386
do_fast_syscall_32+0x34/0x80 arch/x86/entry/common.c:411
entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf7f92579
Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 002b:00000000f5d4656c EFLAGS: 00000206 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 00000000c040aed5
RDX: 0000000020000040 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:to_shadow_page arch/x86/kvm/mmu/spte.h:245 [inline]
RIP: 0010:spte_to_child_sp arch/x86/kvm/mmu/spte.h:250 [inline]
RIP: 0010:root_to_sp arch/x86/kvm/mmu/spte.h:267 [inline]
RIP: 0010:is_page_fault_stale+0xc4/0x530 arch/x86/kvm/mmu/mmu.c:4517
Code: e9 00 01 00 00 48 b8 ff ff ff ff ff 00 00 00 48 21 c3 48 c1 e3 06 49 bc 28 00 00 00 00 ea ff ff 49 01 dc 4c 89 e0 48 c1 e8 03 <42> 80 3c 28 00 74 08 4c 89 e7 e8 6d b7 d8 00 4d 8b 2c 24 31 ff 4c
RSP: 0018:ffffc9000fc6f6f0 EFLAGS: 00010202
RAX: 0000053ffffffffd RBX: 00003fffffffffc0 RCX: ffff88806a8bda00
RDX: 0000000000000000 RSI: 000fffffffffffff RDI: 00000000000129d3
RBP: 00000000000129d3 R08: ffffffff8120c8e0 R09: 1ffff920005e6c00
R10: dffffc0000000000 R11: fffff520005e6c01 R12: 000029ffffffffe8
R13: dffffc0000000000 R14: ffffc9000fc6f800 R15: ffff88807cbed000
FS: 0000000000000000(0000) GS:ffff8880b9400000(0063) knlGS:00000000f5d46b40
CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00000000576d24c0 CR3: 000000007d930000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: e9 00 01 00 00 jmp 0x105
5: 48 b8 ff ff ff ff ff movabs $0xffffffffff,%rax
c: 00 00 00
f: 48 21 c3 and %rax,%rbx
12: 48 c1 e3 06 shl $0x6,%rbx
16: 49 bc 28 00 00 00 00 movabs $0xffffea0000000028,%r12
1d: ea ff ff
20: 49 01 dc add %rbx,%r12
23: 4c 89 e0 mov %r12,%rax
26: 48 c1 e8 03 shr $0x3,%rax
* 2a: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1) <-- trapping instruction
2f: 74 08 je 0x39
31: 4c 89 e7 mov %r12,%rdi
34: e8 6d b7 d8 00 call 0xd8b7a6
39: 4d 8b 2c 24 mov (%r12),%r13
3d: 31 ff xor %edi,%edi
3f: 4c rex.WR
---
This report 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 syzkaller@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title
If you want to overwrite report's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)
If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
next reply other threads:[~2024-07-22 14:53 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-07-22 14:53 syzbot [this message]
2024-07-22 16:08 ` [syzbot] [kvm?] general protection fault in is_page_fault_stale Sean Christopherson
[not found] <CABOYnLz5YygWV-k4GZ3rqs10ipx__sc8WSHz7TDXAeM360vq1w@mail.gmail.com>
2024-08-11 5:35 ` lee bruce
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=0000000000002b84dc061dd73544@google.com \
--to=syzbot+23786faffb695f17edaa@syzkaller.appspotmail.com \
--cc=bp@alien8.de \
--cc=dave.hansen@linux.intel.com \
--cc=hpa@zytor.com \
--cc=kvm@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@redhat.com \
--cc=pbonzini@redhat.com \
--cc=seanjc@google.com \
--cc=syzkaller-bugs@googlegroups.com \
--cc=tglx@linutronix.de \
--cc=x86@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.