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Sun, 02 Feb 2025 09:27:05 -0800 (PST) Date: Sun, 02 Feb 2025 09:27:04 -0800 In-Reply-To: <677928b5.050a0220.3b53b0.004d.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <679faae8.050a0220.d7c5a.0073.GAE@google.com> Subject: Re: [syzbot] [mm?] kernel BUG in alloc_hugetlb_folio_reserve From: syzbot To: airlied@redhat.com, akpm@linux-foundation.org, david@redhat.com, dri-devel@lists.freedesktop.org, kraxel@redhat.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, muchun.song@linux.dev, steven.sistare@oracle.com, syzkaller-bugs@googlegroups.com, vivek.kasireddy@intel.com Content-Type: text/plain; charset="UTF-8" X-Rspamd-Queue-Id: D3101C0007 X-Rspam-User: X-Rspamd-Server: rspam11 X-Stat-Signature: uxujnhyoy5y3gdjenk33u6adw6thtqn9 X-HE-Tag: 1738517225-35501 X-HE-Meta: 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 O1tdW1lZ 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 tVUHfCth XL0RDN6ClQiRKIWpN4BFNjReNYgQeJlfaeBZ50RtJTGird4EdlmdjMCDS5Nge2t+zVfL1oaYhwLaBgQOVexbd+ZCxLWLVKDtlP9IobMOgkn60dnowCL6PrVhn/LLN/pP+zfa+pHM+fM= X-Bogosity: Ham, tests=bogofilter, spamicity=0.011228, 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 c6a3194c05e7e6fd0e8fbfb1720084ae2503c4ac Author: Vivek Kasireddy Date: Mon Jun 24 06:36:16 2024 +0000 udmabuf: pin the pages using memfd_pin_folios() API bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=12c71724580000 start commit: 69e858e0b8b2 Merge tag 'uml-for-linus-6.14-rc1' of git://g.. git tree: upstream final oops: https://syzkaller.appspot.com/x/report.txt?x=11c71724580000 console output: https://syzkaller.appspot.com/x/log.txt?x=16c71724580000 kernel config: https://syzkaller.appspot.com/x/.config?x=d033b14aeef39158 dashboard link: https://syzkaller.appspot.com/bug?extid=a504cb5bae4fe117ba94 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1324fddf980000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=128b55f8580000 Reported-by: syzbot+a504cb5bae4fe117ba94@syzkaller.appspotmail.com Fixes: c6a3194c05e7 ("udmabuf: pin the pages using memfd_pin_folios() API") For information about bisection process see: https://goo.gl/tpsmEJ#bisection