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Wed, 16 Jul 2025 12:11:03 -0700 (PDT) Date: Wed, 16 Jul 2025 12:11:03 -0700 In-Reply-To: <6877e797.a00a0220.3af5df.0012.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6877f947.a70a0220.693ce.002f.GAE@google.com> Subject: Re: [syzbot] [mm?] KASAN: slab-use-after-free Read in mas_next_slot (2) From: syzbot To: Liam.Howlett@oracle.com, akpm@linux-foundation.org, jannh@google.com, liam.howlett@oracle.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, lorenzo.stoakes@oracle.com, pfalcato@suse.de, syzkaller-bugs@googlegroups.com, vbabka@suse.cz Content-Type: text/plain; charset="UTF-8" X-Rspamd-Queue-Id: 8859720009 X-Stat-Signature: 7wa3m85eq6gx1uxwbodgp15ka7offzbn X-Rspam-User: X-Rspamd-Server: rspam08 X-HE-Tag: 1752693064-143636 X-HE-Meta: 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 oV0fEuki 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 7Jo/wtp5 lYRTBO/WBauDSCu5Yz7f6Eo8QVeGegq7DaQsTGaQEjy7RqNKW1cYGNLqqpmu3ole6LfS5wxUxkPcyFlL69NsLBzHgNye0gvPR/MBuSS+1X0= 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 ef69a41567549aa8ba7deb350ab1f3f55011591d Author: Lorenzo Stoakes Date: Fri Jul 11 11:38:23 2025 +0000 mm/mremap: permit mremap() move of multiple VMAs bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=170f458c580000 start commit: 0be23810e32e Add linux-next specific files for 20250714 git tree: linux-next final oops: https://syzkaller.appspot.com/x/report.txt?x=148f458c580000 console output: https://syzkaller.appspot.com/x/log.txt?x=108f458c580000 kernel config: https://syzkaller.appspot.com/x/.config?x=adc3ea2bfe31343b dashboard link: https://syzkaller.appspot.com/bug?extid=ebfd0e44b5c11034e1eb syz repro: https://syzkaller.appspot.com/x/repro.syz?x=11d0658c580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15dd858c580000 Reported-by: syzbot+ebfd0e44b5c11034e1eb@syzkaller.appspotmail.com Fixes: ef69a4156754 ("mm/mremap: permit mremap() move of multiple VMAs") For information about bisection process see: https://goo.gl/tpsmEJ#bisection