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b=UlElNun4iTHHEvsMCSVlBBLid+PiFg8Lv7bhVhLHZAlXem46/mjHbSqjoRPsiUFVb 42fBZ2DogvVqCDJ0r+AePkAvBGw33W1J9Vt4AMW0kfBcxm5HObvahc1SxBtveRGIMr GU9VME7jI64FCBU6nZwQ8vQG0JSgk1LEGMeYE1rE= Date: Mon, 14 Oct 2024 13:13:59 -0700 From: Andrew Morton To: Jeongjun Park Cc: Kairui Song , linux-mm@kvack.org, linux-kernel@vger.kernel.org, syzbot+fa43f1b63e3aa6f66329@syzkaller.appspotmail.com Subject: Re: [PATCH v2] mm: swap: prevent possible data-race in __try_to_reclaim_swap Message-Id: <20241014131359.4a4046efc464a6ce1dc38a4d@linux-foundation.org> In-Reply-To: <8C4EFDA4-A286-40C9-8F96-BD3EE07D6C45@gmail.com> References: <8C4EFDA4-A286-40C9-8F96-BD3EE07D6C45@gmail.com> X-Mailer: Sylpheed 3.8.0beta1 (GTK+ 2.24.33; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Stat-Signature: 9k9gon7aup7sukn4hr8f63wxhmycxn3j X-Rspamd-Queue-Id: 8DD144001F X-Rspam-User: X-Rspamd-Server: rspam08 X-HE-Tag: 1728936833-970390 X-HE-Meta: U2FsdGVkX199+eNDfM4VOL+y/7LxaB+gitBbxDt6tK7gVnIYqF9Fv6u1cZBztXSkbdzzZXBSUDE4PAaBiTmth8zbfhKjojb0253FufCRxXumwjyaMXvBk+jjFRTXQ5Vlpby+lrvKOeCqsasxktDI9cEvVGA/Tqgwu6mZfneod86egCsB7oZ1s73rkedz3m0Ums8xQ0EF92y4OCc7Fbq93D2xz2Hak5vdTngW8uLbxh9MItpnsn4FhZ6mvulMSmua/kM2sc5AgcTZrwPlgSBQD+y3q40nUEdyW2KGnjuYQnAWhdhRL1iwomzQcFq/QJe9AtNOiKT55e9j9Yuro6NMiBjQkVr9rfF/tsxk3x8V3+cf69uTLGaWBOKtEicZYXgKui9I62eUAMSRw71YXYEwgbn9NbbkvUA0Fj2Wrrl3RZM5xjJturcxw1alBS+XFSj2s53vzdCIMOPVy2c04UsgIJb+8MxRGviUKVD0L310lU4OCyxAaqiHEwKqGD7PyJ7ymSmeHt3iX2oXM5bHyGwr1PPeWJ2WrBoucKurLxEx2fTl0Tm8U4k0TARL3u1mYI1EIB25ilztfpCDAjNvzgIr0ZNTKtMOd3KMffn+CUxepyKNrHcOTeFmhuPfl2S0PCHi1xXfQYJUk4+EiYCz/7vT0PX+5viseGoSb5qq4086x5fW7MIOuIcuUivIqVO2a7oseqFOWp1nHuakWD0spKYfen1SdMDL3dcw85i3tIjb2dS30W3dUx+S6y9vUf+yY4BFNGmSgStIrboo0Cj6fw30JvF8KOgoLhLHrD/pdGwQmPNnqwgU/WmIvzXGNErwq5W6JMxk7uE5+bmmTM/Sif/oh5/pMC1to+MDDRa1J8TJZGv3oebjEgUrg9KELtsAslquUguK8E+DzAHEphXLycWYQQaszMl94BKBYDynfMjpJyFExXluJWuOKXccErnOomLEga/imFiyAxcuWl2R6bV A2Q9GNLT nCfWxN52GOBOOVEE0aD3caTktEzdtxoqNDHz6Ej6O905gRxqL+kG9wV/ESjrm3ktgSAmaiiXQLxCZkUY/KLB3rqWZgdLX08tnBOkTjs4lzDf+eRCoTox34Tin5ezMJ6crXENLy592ZHQdSdlYxaZvxf8NcsCUxWpYj+btwxytpVGghUBnjC/gvqPs3mKNxrhWSHVcHg2H5ySug7JRcwkevGJ2y85ymPqB6Np0vTGcsNHHcY3xruD7sxD7JEMIxvNnmdU5wQ7ACMyAuwWvtVVnvm4IWLkFh3lnbTPGXGhwZ4ja8QAU1Abx1Vvf394+x0ONRunKQMHmOTyBC7uuv7cB3w+13vBCcyy+kSMpeDvur0tLLYGb0rNYwgnxxpLVvPpqdZcuhzdIeKdlqbBXLP6iTDLGRAaMt94XKvZ2 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: On Mon, 14 Oct 2024 13:08:29 +0900 Jeongjun Park wrote: > >> As far as I can see, commit 862590ac3708 was applied starting > >> from 6.12-rc1, so it looks like no additional commits are needed > >> for the stable version. > > > > Hi, sorry for the confusion, I meant mm-stable, not the stable branch. > > It's better to merge this in 6.12. > > I agree with you. I think this vulnerability should be fixed quickly, > so it should be applied directly to the next rc version, not the > next tree. However, this vulnerability does not affect the stable > version, so I think it is appropriate to move this patch to the > mm-hotfixes-unstable tree. > > What do you think, Andrew? I moved it into the mm-hotfixes branch for a 6.12 merge.