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Tue, 22 Apr 2025 05:18:59 -0700 (PDT) Received: from blackdock.suse.cz ([193.86.92.181]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-acb6eefc6f3sm655834266b.106.2025.04.22.05.18.58 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 22 Apr 2025 05:18:58 -0700 (PDT) Date: Tue, 22 Apr 2025 14:18:40 +0200 From: Michal =?utf-8?Q?Koutn=C3=BD?= To: Penglei Jiang Cc: tj@kernel.org, cgroups@vger.kernel.org, hannes@cmpxchg.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, xnxc22xnxc22@qq.com Subject: Re: KASAN: slab-use-after-free Read in cgroup_rstat_flush Message-ID: <2eatfmps723vwbvqgqppswny73axxgbmmkaseqjkg2hxojpwvr@3fn36fsfed6x> References: <20250419153843.5035-1-superman.xpt@gmail.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="hiej3wsm4kzjo3ca" Content-Disposition: inline In-Reply-To: <20250419153843.5035-1-superman.xpt@gmail.com> X-Stat-Signature: y8ut1fd8d5rqrp9yrfxbmeg5inrc9r5s X-Rspamd-Queue-Id: 2B9A1A0003 X-Rspam-User: X-Rspamd-Server: rspam05 X-HE-Tag: 1745324340-645423 X-HE-Meta: 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 7JuR9+P/ 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: --hiej3wsm4kzjo3ca Content-Type: text/plain; protected-headers=v1; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Subject: Re: KASAN: slab-use-after-free Read in cgroup_rstat_flush MIME-Version: 1.0 On Sat, Apr 19, 2025 at 08:38:43AM -0700, Penglei Jiang wrote: > On Mon, 14 Apr 2025 07:42:30 -1000, tj wrote: >=20 > > Maybe another casualty of the bug fixed by a22b3d54de94 ("cgroup/cpuset= : Fix > > race between newly created partition and dying one")? >=20 > This issue was maybe caused by commit 093c8812de2d3, and was later fixed > by commit 7d6c63c319142. Ah, I overlooked that the original report is not for v6.14 but f6e0150b2003 actually (correct?), so this is sensible in that context. Does it mean you cannot attain the KASAN report post 7d6c63c319142? Thanks, Michal --hiej3wsm4kzjo3ca Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iHUEABYKAB0WIQTd6mfF2PbEZnpdoAkt3Wney77BSQUCaAeJHgAKCRAt3Wney77B SVALAQCxpvY+YXDCaGceP86Ps37TAi1fztt+MjmyKf9IWzf4VQD+LGcIjiluUvvf 3CDAaVURoOL8D/lTu6M3RIITuf41bQU= =V4iz -----END PGP SIGNATURE----- --hiej3wsm4kzjo3ca--