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Tue, 21 Apr 2026 19:06:39 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Zw Tang Date: Wed, 22 Apr 2026 10:06:28 +0800 X-Gm-Features: AQROBzB3IdcUoNE8gY4nt8VKhmEXVV5Fnvmw6CBhzLSSLuB-JKuDXfk-zuHB0T8 Message-ID: Subject: =?UTF-8?Q?=E5=9B=9E=E5=A4=8D=3A_=5BBUG=5D_WARNING_in_workingset=5Factivation_trigg?= =?UTF-8?Q?ered_by_KVM_page_fault_path_on_Linux_7=2E0=2E0=2D08391=2Dg1d51b370a0?= =?UTF-8?Q?f8?= To: "David Hildenbrand (Arm)" , "linux-mm@kvack.org" , "akpm@linux-foundation.org" , "hannes@cmpxchg.org" Cc: "kvm@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "pbonzini@redhat.com" , "seanjc@google.com" Content-Type: multipart/alternative; boundary="000000000000752849065002fb4d" X-Rspamd-Server: rspam10 X-Stat-Signature: qbgt5pjxp6gypb7ykd1j7tqyhoc4j43y X-Rspam-User: X-Rspamd-Queue-Id: 931FB140005 X-HE-Tag: 1776823600-199151 X-HE-Meta: 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 wX/cGV9f 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 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: --000000000000752849065002fb4d Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable ------------------------------ *=E5=8F=91=E4=BB=B6=E4=BA=BA:* Tang Zw *=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4:* 2026=E5=B9=B44=E6=9C=8822=E6=97=A5 = 10:03 *=E6=94=B6=E4=BB=B6=E4=BA=BA:* David Hildenbrand (Arm) ; = linux-mm@kvack.org < linux-mm@kvack.org>; akpm@linux-foundation.org ; hannes@cmpxchg.org *=E6=8A=84=E9=80=81:* kvm@vger.kernel.org ; linux-kernel@vger.kernel.org ; pbonzini@redhat.com ; seanjc@google.com < seanjc@google.com> *=E4=B8=BB=E9=A2=98:* =E5=9B=9E=E5=A4=8D: [BUG] WARNING in workingset_activ= ation triggered by KVM page fault path on Linux 7.0.0-08391-g1d51b370a0f8 Hi David, Thanks for pointing this out. You are right. The commit id I sent was incorrect. I mistakenly used the git describe-style suffix g1d51b370a0f8, but the actual git commit is: 1d51b370a0f8f642f4fc84c795fbedac0fcdbbd2 The short commit id is: 1d51b370a0f8 Sorry for the confusion. I am also re-checking whether the kernel image was built from a clean tree and whether there were any local modifications when the crash was reproduced, so that the reported source line numbers match the exact build. Thanks. ------------------------------ *=E5=8F=91=E4=BB=B6=E4=BA=BA:* David Hildenbrand (Arm) *=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4:* 2026=E5=B9=B44=E6=9C=8821=E6=97=A5 = 22:06 *=E6=94=B6=E4=BB=B6=E4=BA=BA:* Zw Tang ; linux-mm@kvack= .org ; akpm@linux-foundation.org ; hannes@cmpxchg.org < hannes@cmpxchg.org> *=E6=8A=84=E9=80=81:* kvm@vger.kernel.org ; linux-kernel@vger.kernel.org ; pbonzini@redhat.com ; seanjc@google.com < seanjc@google.com> *=E4=B8=BB=E9=A2=98:* Re: [BUG] WARNING in workingset_activation triggered = by KVM page fault path on Linux 7.0.0-08391-g1d51b370a0f8 On 4/21/26 13:17, Zw Tang wrote: > Hi, > > I am reporting a WARNING in workingset_activation() triggered by a > syzkaller C reproducer on Linux 7.0.0-08391-g1d51b370a0f8. g1d51b370a0f8 is not a known git commit id. Do you have an upstream git commit where the line number include/linux/memcontrol.h:381 makes sense? --=20 Cheers, David --000000000000752849065002fb4d Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable

=E5=8F=91= =E4=BB=B6=E4=BA=BA: Tang Zw <shicenci@gmail.com>
=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4: 2026=E5=B9=B44=E6=9C=8822=E6= =97=A5 10:03
=E6=94=B6=E4=BB=B6=E4=BA=BA: David Hildenbrand (Arm) <david@kernel.org>; linux-mm@kvack.org &l= t;linux-mm@kvack.or= g>; a= kpm@linux-foundation.org <akpm@linux-foundation.org>; hannes@cmpxchg.org <hannes@cmpxchg.org>
=E6=8A=84=E9=80=81: kvm@vger.kernel.org <kvm@vger.kernel.org>; linux-kernel@vger.kernel.org <= ;linux-ke= rnel@vger.kernel.org>; pbonzini@redhat.com <pbonzini@redhat.com>; seanjc@google.com <seanjc@google.com>
=E4=B8=BB=E9=A2=98: =E5=9B=9E=E5=A4=8D: [BUG] WARNING in workingset_= activation triggered by KVM page fault path on Linux 7.0.0-08391-g1d51b370a= 0f8
=C2=A0
Hi David,
Thanks for pointing this out.
You are right. The commit id I sent was incorrect. I mistakenly used the git describe-style suffix g1d51b370a0f8, but the = actual git commit is:
1d51b370a0f8f642f4fc84c795fbedac0fcdbbd2
The short commit id is:
1d51b370a0f8
Sorry for the confusion.
I am also re-checking whether the kernel image was built from a clean tree<= br> and whether there were any local modifications when the crash was reproduce= d,
so that the reported source line numbers match the exact build.
Thanks.

=E5=8F= =91=E4=BB=B6=E4=BA=BA: David Hildenbrand (Arm) <david@kernel.org>
=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4: 2026=E5=B9=B44=E6=9C=8821=E6= =97=A5 22:06
=E6=94=B6=E4=BB=B6=E4=BA=BA: Zw Tang <shicenci@gmail.com>; linux-mm@kvack.org <linux-mm@kvack.org>; <= a href=3D"mailto:akpm@linux-foundation.org" target=3D"_blank">akpm@linux-fo= undation.org <akpm@linux-foundation.org>; hannes@cmpxchg.org <hannes@cmpxchg.org>
=E6=8A=84=E9=80=81: kvm@vger.kernel.org <kvm@vger.kernel.org>; linux-kernel@vger.kernel.org <= ;linux-ke= rnel@vger.kernel.org>; pbonzini@redhat.com <pbonzini@redhat.com>; seanjc@google.com <seanjc@google.com>
=E4=B8=BB=E9=A2=98: Re: [BUG] WARNING in workingset_activation trigg= ered by KVM page fault path on Linux 7.0.0-08391-g1d51b370a0f8
=C2=A0
On 4/21/26 13:17, Zw Tang wrote:
> Hi,
>
> I am reporting a WARNING in workingset_activation() triggered by a
> syzkaller C reproducer on Linux 7.0.0-08391-g1d51b370a0f8.

g1d51b370a0f8 is not a known git commit id.

Do you have an upstream git commit where the line number
include/linux/memcontrol.h:381 makes sense?


--
Cheers,

David
--000000000000752849065002fb4d--