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Wed, 14 May 2025 06:58:03 -0700 (PDT) Date: Wed, 14 May 2025 06:58:03 -0700 In-Reply-To: <67f1c7df.050a0220.0a13.0256.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6824a16b.a70a0220.3e9d8.0015.GAE@google.com> Subject: Re: [syzbot] [mm?] general protection fault in mremap From: syzbot To: Liam.Howlett@oracle.com, akpm@linux-foundation.org, eadavis@qq.com, jannh@google.com, liam.howlett@oracle.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, lorenzo.stoakes@oracle.com, nogikh@google.com, pfalcato@suse.de, syzkaller-bugs@googlegroups.com, syzkaller@googlegroups.com, vbabka@suse.cz Content-Type: text/plain; charset="UTF-8" X-Rspamd-Queue-Id: 8E6A3C0003 X-Rspam-User: X-Rspamd-Server: rspam11 X-Stat-Signature: i55b8xyjasoyrommjkhyd7npuri7ccxr X-HE-Tag: 1747231084-745263 X-HE-Meta: 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 +iGuzhFv 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 yTFbuonI Jcj+g1r5P4wrYGKiqpExEXL7MGwJ9cz+cDsLp4iYmkJcZ5+Y3BYzMCyPyjQBkey1P2c0KoApCXVRVQXGr/CFA+EFhCC71D5E 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 suspects this issue was fixed by commit: commit 36eed5400805b294f1df39b0e3ebc5b7971b3c16 Author: Lorenzo Stoakes Date: Sun Mar 30 16:20:48 2025 +0000 mm/mremap: do not set vrm->vma NULL immediately prior to checking it bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=118356f4580000 start commit: a2cc6ff5ec8f Merge tag 'firewire-updates-6.15' of git://gi.. git tree: upstream kernel config: https://syzkaller.appspot.com/x/.config?x=adffebefc9feb9d6 dashboard link: https://syzkaller.appspot.com/bug?extid=5250c4727db03e3436cc syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1693d404580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=178ac94c580000 If the result looks correct, please mark the issue as fixed by replying with: #syz fix: mm/mremap: do not set vrm->vma NULL immediately prior to checking it For information about bisection process see: https://goo.gl/tpsmEJ#bisection