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Sat, 25 Jun 2022 10:36:14 -0700 (PDT) Date: Sat, 25 Jun 2022 10:36:14 -0700 In-Reply-To: <0000000000003189f305e19f5d3e@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000a4531805e2491f77@google.com> Subject: Re: [syzbot] KASAN: null-ptr-deref Read in hugepage_vma_check From: syzbot To: akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, shy828301@gmail.com, syzkaller-bugs@googlegroups.com, willy@infradead.org, zokeefe@google.com Content-Type: text/plain; charset="UTF-8" ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1656178575; a=rsa-sha256; cv=none; b=BfFYRq5K5E2AzjutMdxNsG1vXxR0p4LI0I9mXwEGFSOrd1qHBH0yEHj0gl6Po83yZOyyFl XEF8SlTatw5S0P2LeTIEHeupPDVWOo8vsZhbKqmAe3xhzHew6ePnWe6vgJ2UHVGlsbzIuB G3p1Ebdjoyh3sMcLDTQBQixmDOPJhFM= ARC-Authentication-Results: i=1; imf01.hostedemail.com; dkim=none; dmarc=fail reason="SPF not aligned (relaxed), No valid DKIM" header.from=appspotmail.com (policy=none); 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dkim=none; dmarc=fail reason="SPF not aligned (relaxed), No valid DKIM" header.from=appspotmail.com (policy=none); spf=pass (imf01.hostedemail.com: domain of 3jke3YgkbABcFLM7x881ExCC50.3BB381HF1EzBAG1AG.zB9@M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com designates 209.85.166.69 as permitted sender) smtp.mailfrom=3jke3YgkbABcFLM7x881ExCC50.3BB381HF1EzBAG1AG.zB9@M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com X-HE-Tag: 1656178575-505651 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: syzbot has bisected this issue to: commit 0a44ebaaa3f3ecfacd2744467957882eabd92cec Author: Yang Shi Date: Thu Jun 16 17:48:37 2022 +0000 mm: thp: kill transparent_hugepage_active() bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=166ba760080000 start commit: 34d1d36073ea Add linux-next specific files for 20220621 git tree: linux-next final oops: https://syzkaller.appspot.com/x/report.txt?x=156ba760080000 console output: https://syzkaller.appspot.com/x/log.txt?x=116ba760080000 kernel config: https://syzkaller.appspot.com/x/.config?x=b24b62d1c051cfc8 dashboard link: https://syzkaller.appspot.com/bug?extid=4d875b4d2e2b60bae9b4 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14097a3ff00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1466c63ff00000 Reported-by: syzbot+4d875b4d2e2b60bae9b4@syzkaller.appspotmail.com Fixes: 0a44ebaaa3f3 ("mm: thp: kill transparent_hugepage_active()") For information about bisection process see: https://goo.gl/tpsmEJ#bisection