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Tue, 03 Oct 2023 10:23:45 -0700 (PDT) Date: Tue, 03 Oct 2023 10:23:45 -0700 In-Reply-To: <0000000000005f05820606a0838a@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000003179510606d327e5@google.com> Subject: Re: [syzbot] [mm?] WARNING in copy_hugetlb_page_range From: syzbot To: akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, llvm@lists.linux.dev, mike.kravetz@oracle.com, muchun.song@linux.dev, nathan@kernel.org, ndesaulniers@google.com, syzkaller-bugs@googlegroups.com, trix@redhat.com Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org syzbot has found a reproducer for the following issue on: HEAD commit: c9f2baaa18b5 Add linux-next specific files for 20231003 git tree: linux-next console+strace: https://syzkaller.appspot.com/x/log.txt?x=154df992680000 kernel config: https://syzkaller.appspot.com/x/.config?x=3fe9c462fee1649f dashboard link: https://syzkaller.appspot.com/bug?extid=ec78016e3d67860eec28 compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=11e4b011680000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=11772062680000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/5361e41384fe/disk-c9f2baaa.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/7028b209124d/vmlinux-c9f2baaa.xz kernel image: https://storage.googleapis.com/syzbot-assets/a167dc667ee5/bzImage-c9f2baaa.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+ec78016e3d67860eec28@syzkaller.appspotmail.com ------------[ cut here ]------------ WARNING: CPU: 0 PID: 5054 at include/linux/hugetlb.h:1289 hugetlb_walk include/linux/hugetlb.h:1289 [inline] WARNING: CPU: 0 PID: 5054 at include/linux/hugetlb.h:1289 copy_hugetlb_page_range+0x675/0x3520 mm/hugetlb.c:4940 Modules linked in: CPU: 0 PID: 5054 Comm: syz-executor329 Not tainted 6.6.0-rc4-next-20231003-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023 RIP: 0010:hugetlb_walk include/linux/hugetlb.h:1289 [inline] RIP: 0010:copy_hugetlb_page_range+0x675/0x3520 mm/hugetlb.c:4940 Code: 00 be ff ff ff ff 48 81 c7 a0 01 00 00 e8 b3 2f 6c 08 31 ff 89 c5 89 c6 e8 68 77 ae ff 85 ed 0f 85 dd fd ff ff e8 eb 7b ae ff <0f> 0b e9 d1 fd ff ff e8 df 7b ae ff 49 89 ec 31 ff 41 81 e4 ff 0f RSP: 0018:ffffc90003a2f4a0 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000020000000 RCX: ffffffff81d9dcf8 RDX: ffff8880675d0000 RSI: ffffffff81d9dd05 RDI: 0000000000000005 RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000000 R11: ffffffff910df9a8 R12: ffff88807905b900 R13: ffff88801efab500 R14: 0000000020000000 R15: dffffc0000000000 FS: 0000555557543380(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fcd71918140 CR3: 000000007b828000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: copy_page_range+0x1dc2/0x3c70 mm/memory.c:1293 dup_mmap+0x13f3/0x1d80 kernel/fork.c:758 dup_mm kernel/fork.c:1684 [inline] copy_mm kernel/fork.c:1733 [inline] copy_process+0x6cc9/0x74b0 kernel/fork.c:2495 kernel_clone+0xfd/0x920 kernel/fork.c:2900 __do_sys_clone3+0x1f1/0x260 kernel/fork.c:3201 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fcd71930ab9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 c1 17 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffc79f4f9b8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b3 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fcd71930ab9 RDX: 00007ffc79f4f9c0 RSI: 0000000000000058 RDI: 00007ffc79f4f9c0 RBP: 00007fcd719a35f0 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000000001 R13: 431bde82d7b634db R14: 0000000000000001 R15: 0000000000000001 --- If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing.