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Wed, 09 Feb 2022 22:08:07 -0800 (PST) Date: Wed, 09 Feb 2022 22:08:07 -0800 In-Reply-To: <000000000000a3571605d27817b5@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000001f60ef05d7a3c6ad@google.com> Subject: Re: [syzbot] WARNING: kmalloc bug in xdp_umem_create (2) From: syzbot To: akpm@linux-foundation.org, andrii@kernel.org, ast@kernel.org, bjorn.topel@gmail.com, bjorn.topel@intel.com, bjorn@kernel.org, bpf@vger.kernel.org, daniel@iogearbox.net, davem@davemloft.net, fgheet255t@gmail.com, hawk@kernel.org, john.fastabend@gmail.com, jonathan.lemon@gmail.com, kafai@fb.com, kpsingh@kernel.org, kuba@kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, magnus.karlsson@intel.com, mudongliangabcd@gmail.com, netdev@vger.kernel.org, songliubraving@fb.com, syzkaller-bugs@googlegroups.com, torvalds@linux-foundation.org, w@1wt.eu, yhs@fb.com Content-Type: text/plain; charset="UTF-8" X-Rspamd-Queue-Id: B60A4A0002 Authentication-Results: imf25.hostedemail.com; dkim=none; dmarc=fail reason="SPF not aligned (relaxed), No valid DKIM" header.from=appspotmail.com (policy=none); spf=pass (imf25.hostedemail.com: domain of 3x6sEYgkbAEg289ukvvo1kzzsn.qyyqvo42o1myx3ox3.myw@M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com designates 209.85.166.199 as permitted sender) smtp.mailfrom=3x6sEYgkbAEg289ukvvo1kzzsn.qyyqvo42o1myx3ox3.myw@M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com X-Stat-Signature: hatdgoo68rgdn1jc6x431sam4pqputoh X-Rspam-User: X-Rspamd-Server: rspam10 X-HE-Tag: 1644473287-821222 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 7661809d493b426e979f39ab512e3adf41fbcc69 Author: Linus Torvalds Date: Wed Jul 14 16:45:49 2021 +0000 mm: don't allow oversized kvmalloc() calls bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=13bc74c2700000 start commit: f4bc5bbb5fef Merge tag 'nfsd-5.17-2' of git://git.kernel.o.. git tree: upstream final oops: https://syzkaller.appspot.com/x/report.txt?x=107c74c2700000 console output: https://syzkaller.appspot.com/x/log.txt?x=17bc74c2700000 kernel config: https://syzkaller.appspot.com/x/.config?x=5707221760c00a20 dashboard link: https://syzkaller.appspot.com/bug?extid=11421fbbff99b989670e syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12e514a4700000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15fcdf8a700000 Reported-by: syzbot+11421fbbff99b989670e@syzkaller.appspotmail.com Fixes: 7661809d493b ("mm: don't allow oversized kvmalloc() calls") For information about bisection process see: https://goo.gl/tpsmEJ#bisection