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Wed, 24 Jul 2024 18:01:01 -0700 (PDT) Date: Wed, 24 Jul 2024 18:01:01 -0700 In-Reply-To: <0000000000006bca48061692b790@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000ae7466061e07ed39@google.com> Subject: Re: [syzbot] [mm?] possible deadlock in gup_fast_fallback From: syzbot To: akpm@linux-foundation.org, almaz.alexandrovich@paragon-software.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" X-Rspam-User: X-Rspamd-Server: rspam01 X-Rspamd-Queue-Id: 7D72C160006 X-Stat-Signature: ybdwtu5fuf86serhukndnaqj4ogdbsw1 X-HE-Tag: 1721869262-528668 X-HE-Meta: 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 n9hVFh6W OPmUfxIsq+gNtxOao1l9UoINwb5ETTsbGgbSSP0KjyElAP+Mh4CpbF88+ixWkViIsLNZmrtRpLyuGkrn/fZtf0rgpv4oJPIT3FFOCNvm/WwIEIRH4e9OOttfJWJ2wSkL1RGjuzF5hjf5yX+/cmi6AWkR5xj+H+x9hU7Y8Ocza1ZbbwNI1J1ymcPh19kModIj0K8lX1CQrCw2d79ZikOvhStSHxQX2DTEDMQFHENs+Rjm/Jesigu9+A7SmnTVnmm7bYFaMXoqpK9H1MWcXxm3ygqsbSLmRCxLOErABbodjWDPBljhvM8r1TQcropG72njbWtJrAqNvqxhW5BDP0W2uq9k2fy5MiG0pNypkVTqmJVxRr8gDgRZG7U1h4fPpvwtHEgJ8fyA+tR+nLhl/VhVxFOWrvOOy+MAWzXPAZAQXBPQgiUtbjJsvXCMTsHRquy2a/8+UjzcWCDKPgGv0yzu+/5NdzugmuGPKwAVYNi3Ss7XQWtAlx+S5nblosY9E/OtlOZ36DO3eM03S8cuH+sdLXyRSb6oUYTiz3XGT0kH1QCY33xPo/XFgtBJtD60+AIsaUCTIJ1k6lT6UPP0o4L8zTOgKBxlLXqkM01YFy5NnIxpvJGcjakZEqYmn9xQnldNHX/ZCDInkXHgsiu5hyWDbsIa1ENigAcNRmP1OYz9LOQ9IW5dkzYHxRwEjuhwoDB/Tm08mYnPkv8kKgRIVo8W4JTx9Qqqmpfz9Og7pjXBbeiHMnSOcBVEtoqmz+eAYXW9HwFlbJevvhMKyD1yBfWqN3uKxtTwnuN8h+xEBNeE3CPd2pI/OXxy1+OOY1rD0ypYcBO61CBlRfNXjHgC2W6FlO6IKv1CYyX0w6/HFE7/ZlS2PFjHAwmoqefkV4DN4ik65MFp25suA2yUXubtCyAcb89T3r42ItMaRgQRSGrbJzkgpMUB33glGMvycunSs4l+RsZ1YzZ86UhVqNJImvQth8TkoJV6g qrWVoG16 XlrT6Hpf1jGINNz0fDecxMYUbYe+I326Q0kq3WYFGJO024ANoSWTjkkk3nQ01OsoSZmI5sKvFyyvlJ8cRN8+CgbG33Xk3ivPPX6l2at995EMVYDvRm+rNHoCHZHwovmuEPay9qW3jtw= 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: syzbot has bisected this issue to: commit 69505fe98f198ee813898cbcaf6770949636430b Author: Konstantin Komarov Date: Thu May 30 07:54:07 2024 +0000 fs/ntfs3: Replace inode_trylock with inode_lock bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=157ffac9980000 start commit: 786c8248dbd3 Merge tag 'perf-tools-fixes-for-v6.11-2024-07.. git tree: upstream final oops: https://syzkaller.appspot.com/x/report.txt?x=177ffac9980000 console output: https://syzkaller.appspot.com/x/log.txt?x=137ffac9980000 kernel config: https://syzkaller.appspot.com/x/.config?x=d732ba79a3d0331b dashboard link: https://syzkaller.appspot.com/bug?extid=63ba90b81c16b86379bd syz repro: https://syzkaller.appspot.com/x/repro.syz?x=162862e3980000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10d14ce3980000 Reported-by: syzbot+63ba90b81c16b86379bd@syzkaller.appspotmail.com Fixes: 69505fe98f19 ("fs/ntfs3: Replace inode_trylock with inode_lock") For information about bisection process see: https://goo.gl/tpsmEJ#bisection