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Fri, 13 May 2022 09:43:24 -0700 (PDT) Date: Fri, 13 May 2022 09:43:24 -0700 In-Reply-To: <000000000000ef451a05dee0f2b1@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000077377c05dee75f63@google.com> Subject: Re: [syzbot] WARNING in follow_hugetlb_page From: syzbot To: akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, llvm@lists.linux.dev, mike.kravetz@oracle.com, nathan@kernel.org, ndesaulniers@google.com, syzkaller-bugs@googlegroups.com, trix@redhat.com Content-Type: text/plain; charset="UTF-8" X-Rspamd-Server: rspam02 X-Rspamd-Queue-Id: 790AF800C9 X-Stat-Signature: b5c7hp3n3f7fqog163s4p1awqpyok31o X-Rspam-User: Authentication-Results: imf02.hostedemail.com; dkim=none; spf=pass (imf02.hostedemail.com: domain of 3rIp-YgkbANUJPQB1CC5I1GG94.7FF7C5LJ5I3FEK5EK.3FD@M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com designates 209.85.166.200 as permitted sender) smtp.mailfrom=3rIp-YgkbANUJPQB1CC5I1GG94.7FF7C5LJ5I3FEK5EK.3FD@M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; dmarc=fail reason="SPF not aligned (relaxed), No valid DKIM" header.from=appspotmail.com (policy=none) X-HE-Tag: 1652460196-437277 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 found a reproducer for the following issue on: HEAD commit: 1e1b28b936ae Add linux-next specific files for 20220513 git tree: linux-next console+strace: https://syzkaller.appspot.com/x/log.txt?x=174ae715f00000 kernel config: https://syzkaller.appspot.com/x/.config?x=e4eb3c0c4b289571 dashboard link: https://syzkaller.appspot.com/bug?extid=acf65ca584991f3cc447 compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=11531766f00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16ce5a9ef00000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+acf65ca584991f3cc447@syzkaller.appspotmail.com ------------[ cut here ]------------ WARNING: CPU: 1 PID: 3611 at mm/hugetlb.c:6250 follow_hugetlb_page+0x1326/0x1c80 mm/hugetlb.c:6250 Modules linked in: CPU: 1 PID: 3611 Comm: syz-executor603 Not tainted 5.18.0-rc6-next-20220513-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:follow_hugetlb_page+0x1326/0x1c80 mm/hugetlb.c:6250 Code: 89 44 24 70 e8 2b 1d b7 ff 48 8b 44 24 70 48 85 c0 0f 84 f1 07 00 00 e8 88 1a b7 ff 48 83 ed 01 e9 09 fb ff ff e8 7a 1a b7 ff <0f> 0b 48 8b 7c 24 30 bb f4 ff ff ff e8 69 74 b8 07 4c 8b a4 24 b8 RSP: 0018:ffffc90002f6f7e0 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffff88801bdd4e00 RCX: 0000000000000000 RDX: ffff88801e4e3a80 RSI: ffffffff81c38f76 RDI: 0000000000000003 RBP: ffffea0001fe8680 R08: 0000000000000000 R09: 0000000000000003 R10: ffffffff81b128fb R11: 0000000000000008 R12: 000000000000001a R13: ffff88801bdd4e00 R14: ffff88801bdd5600 R15: 0000000000000019 FS: 0000555556ad2300(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000458 CR3: 000000001e850000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __get_user_pages+0x27a/0xfa0 mm/gup.c:1146 __get_user_pages_locked mm/gup.c:1365 [inline] __gup_longterm_locked+0x1d5/0xfe0 mm/gup.c:1985 pin_user_pages+0x8e/0xe0 mm/gup.c:3118 io_sqe_buffer_register+0x254/0x1710 fs/io_uring.c:10537 io_sqe_buffers_register.cold+0x28e/0x443 fs/io_uring.c:10664 __io_uring_register fs/io_uring.c:12682 [inline] __do_sys_io_uring_register+0xd21/0x1930 fs/io_uring.c:12816 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 RIP: 0033:0x7f5f42760cc9 Code: 28 c3 e8 2a 14 00 00 66 2e 0f 1f 84 00 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fffc3407aa8 EFLAGS: 00000246 ORIG_RAX: 00000000000001ab RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007f5f42760cc9 RDX: 0000000020000380 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 00007f5f42724e70 R08: 0000000010000000 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000246 R12: 00007f5f42724f00 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000