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Wed, 03 Sep 2025 20:36:03 -0700 (PDT) Date: Wed, 03 Sep 2025 20:36:03 -0700 In-Reply-To: <000000000000939d0a0621818f1e@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <68b90923.050a0220.3db4df.020e.GAE@google.com> Subject: Re: [syzbot] [mm?] INFO: task hung in hugetlb_fault From: syzbot To: akpm@linux-foundation.org, david@redhat.com, dvyukov@google.com, elver@google.com, glider@google.com, kasan-dev@googlegroups.com, keescook@chromium.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, mcgrof@kernel.org, mhiramat@kernel.org, mhocko@suse.com, mike.kravetz@oracle.com, muchun.song@linux.dev, osalvador@suse.de, syzkaller-bugs@googlegroups.com, torvalds@linux-foundation.org, vbabka@suse.cz Content-Type: text/plain; charset="UTF-8" X-Rspamd-Queue-Id: D032C10000F X-Stat-Signature: ofy7zdedjme6b5oem11rksc95niab3yb X-Rspam-User: X-Rspamd-Server: rspam06 X-HE-Tag: 1756956964-732298 X-HE-Meta: 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 e7yX9mQV 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 bmA7TByK CVZzWdolppxeavU3kgP84V1CASrB0lNlDNlCuJnlax+0jihDozYJW/FYEia23L38TT/ip8LoPYZ++M05eMXlhw== 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 2ae1ab9934c785b855583e3eabd208d6f3ac91e1 Author: Oscar Salvador Date: Mon Jun 30 14:42:08 2025 +0000 mm,hugetlb: change mechanism to detect a COW on private mapping bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=1289ea42580000 start commit: 87d6aab2389e Merge tag 'for_linus' of git://git.kernel.org.. git tree: upstream kernel config: https://syzkaller.appspot.com/x/.config?x=fb6ea01107fa96bd dashboard link: https://syzkaller.appspot.com/bug?extid=7bb5e48f6ead66c72906 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17dd6327980000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16d24f9f980000 If the result looks correct, please mark the issue as fixed by replying with: #syz fix: mm,hugetlb: change mechanism to detect a COW on private mapping For information about bisection process see: https://goo.gl/tpsmEJ#bisection