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Tue, 01 Oct 2024 21:48:02 -0700 (PDT) Date: Tue, 01 Oct 2024 21:48:02 -0700 In-Reply-To: <66f8846e.050a0220.aab67.000b.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <66fcd082.050a0220.f28ec.04f1.GAE@google.com> Subject: Re: [syzbot] [mm?] possible deadlock in upgrade_mmap_lock_carefully From: syzbot To: akpm@linux-foundation.org, ebpqwerty472123@gmail.com, hughd@google.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, paul@paul-moore.com, stephen.smalley.work@gmail.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" X-Stat-Signature: mtn9aznz9k7tjwjpxnoo3i1bw39jsb3w X-Rspamd-Queue-Id: 9D16FC0004 X-Rspam-User: X-Rspamd-Server: rspam10 X-HE-Tag: 1727844483-638206 X-HE-Meta: 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 PJg6xemm 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 jSRKXWbc 7s6W3M62Fwrn1EZ3Ddrl4pQ3uHuyb6xXrqpsWZS1dPGBJ3uJW+YHoYeHJyAYTttuX9RuGTfkaJHwjiAfaHZiRmnP/cL7KEQG7Bg6U05pmFNybbplJHE6hwr54lp5HhVo2bTQs7pAcPqgJHr9lfi7J1iFT/OeauyJNDkJxpIHPz/ZsOUlNlqcOsFp8Ckt8mxMPX+8erFa+Evx8UjJMnkiwg== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000036, 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 ea7e2d5e49c05e5db1922387b09ca74aa40f46e2 Author: Shu Han Date: Tue Sep 17 09:41:04 2024 +0000 mm: call the security_mmap_file() LSM hook in remap_file_pages() bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=1530539f980000 start commit: e32cde8d2bd7 Merge tag 'sched_ext-for-6.12-rc1-fixes-1' of.. git tree: upstream final oops: https://syzkaller.appspot.com/x/report.txt?x=1730539f980000 console output: https://syzkaller.appspot.com/x/log.txt?x=1330539f980000 kernel config: https://syzkaller.appspot.com/x/.config?x=286b31f2cf1c36b5 dashboard link: https://syzkaller.appspot.com/bug?extid=a6456f6334aa19425886 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=154e8927980000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1244bdd0580000 Reported-by: syzbot+a6456f6334aa19425886@syzkaller.appspotmail.com Fixes: ea7e2d5e49c0 ("mm: call the security_mmap_file() LSM hook in remap_file_pages()") For information about bisection process see: https://goo.gl/tpsmEJ#bisection