suspicious RCU usage at arch/x86/kvm/x86.c:LINE (2)

[syzbot]

Hello,

syzkaller hit the following crash on
720bbe532b7c8f5613b48dea627fc58ed9ace707
git://git.cmpxchg.org/linux-mmots.git/master
compiler: gcc (GCC) 7.1.1 20170620
.config is attached
Raw console output is attached.


CC: [h...@zytor.com k...@vger.kernel.org linux-...@vger.kernel.org
mi...@redhat.com pbon...@redhat.com rkr...@redhat.com tg...@linutronix.de
x...@kernel.org]

WARNING: suspicious RCU usage
4.13.0-mm1+ #7 Not tainted
-----------------------------
*** Guest State ***
CR0: actual=0x0000000080000031, shadow=0x0000000060000010,
gh_mask=fffffffffffffff7
CR4: actual=0x0000000000002051, shadow=0x0000000000000000,
gh_mask=ffffffffffffe871
CR3 = 0x00000000fffbc000
RSP = 0x000000000000fffa RIP = 0x0000000000000000
RFLAGS=0x00023000 DR7 = 0x0000000000000400
Sysenter RSP=0000000000000000 CS:RIP=0000:0000000000000000
CS: sel=0x0000, attr=0x000f3, limit=0x0000ffff, base=0x0000000000000000
DS: sel=0x0000, attr=0x000f3, limit=0x0000ffff, base=0x0000000000000000
SS: sel=0x0000, attr=0x000f3, limit=0x0000ffff, base=0x0000000000000000
ES: sel=0x0000, attr=0x000f3, limit=0x0000ffff, base=0x0000000000000000
FS: sel=0x0000, attr=0x000f3, limit=0x0000ffff, base=0x0000000000000000
GS: sel=0x0000, attr=0x000f3, limit=0x0000ffff, base=0x0000000000000000
GDTR: limit=0x0000ffff, base=0x0000000000000000
LDTR: sel=0x0000, attr=0x00082, limit=0x0000ffff, base=0x0000000000000000
IDTR: limit=0x0000ffff, base=0x0000000000000000
TR: sel=0x0000, attr=0x0008b, limit=0x00002088, base=0x0000000000000000
EFER = 0x0000000000000000 PAT = 0x0007040600070406
DebugCtl = 0x0000000000000000 DebugExceptions = 0x0000000000000000
Interruptibility = 00000000 ActivityState = 00000000
*** Host State ***
RIP = 0xffffffff811b8bff RSP = 0xffff8801d8b7f4c8
CS=0010 SS=0018 DS=0000 ES=0000 FS=0000 GS=0000 TR=0040
FSBase=00007fb7f3a8f700 GSBase=ffff8801db300000 TRBase=ffff8801db323100
GDTBase=ffffffffff576000 IDTBase=ffffffffff57b000
CR0=0000000080050033 CR3=00000001c1881000 CR4=00000000001426e0
Sysenter RSP=0000000000000000 CS:RIP=0010:ffffffff84d450b0
EFER = 0x0000000000000d01 PAT = 0x0000000000000000
*** Control State ***
PinBased=0000003f CPUBased=b699edfa SecondaryExec=00000042
EntryControls=0000d1ff ExitControls=0023efff
ExceptionBitmap=ffffbfff PFECmask=00000000 PFECmatch=00000000
VMEntry: intr_info=00000000 errcode=00000000 ilen=00000000
VMExit: intr_info=00000000 errcode=00000000 ilen=00000005
reason=80000021 qualification=0000000000000000
IDTVectoring: info=00000000 errcode=00000000
TSC Offset = 0xffffffb20e313c87
EPT pointer = 0x00000001c564e01e
------------[ cut here ]------------
WARNING: CPU: 0 PID: 16668 at arch/x86/kvm/x86.c:7256
kvm_arch_vcpu_ioctl_run+0x213/0x5a30 arch/x86/kvm/x86.c:7256


---
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[Dmitry Vyukov]

That's all corrupted reports:

#syz invalid

On Tue, Oct 31, 2017 at 12:39 PM, syzbot
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