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[2003:cb:c738:b400:6a82:1eac:2b5:8fca]) by smtp.gmail.com with ESMTPSA id dw1-20020a0560000dc100b0033e3cb02cefsm9160367wrb.86.2024.03.25.03.16.26 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 25 Mar 2024 03:16:26 -0700 (PDT) Message-ID: Date: Mon, 25 Mar 2024 11:16:25 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [syzbot] [mm?] kernel BUG in PageHuge To: syzbot , akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, muchun.song@linux.dev, syzkaller-bugs@googlegroups.com References: <00000000000026e662061475a373@google.com> From: David Hildenbrand Cc: Matthew Wilcox Autocrypt: addr=david@redhat.com; keydata= xsFNBFXLn5EBEAC+zYvAFJxCBY9Tr1xZgcESmxVNI/0ffzE/ZQOiHJl6mGkmA1R7/uUpiCjJ dBrn+lhhOYjjNefFQou6478faXE6o2AhmebqT4KiQoUQFV4R7y1KMEKoSyy8hQaK1umALTdL QZLQMzNE74ap+GDK0wnacPQFpcG1AE9RMq3aeErY5tujekBS32jfC/7AnH7I0v1v1TbbK3Gp XNeiN4QroO+5qaSr0ID2sz5jtBLRb15RMre27E1ImpaIv2Jw8NJgW0k/D1RyKCwaTsgRdwuK 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Zp2gXKaI6gbY2yrht3Z8IkG3OZnTSEwOjF+15h6YX3OlNbjo1QIvZ7RbccTcpuC44himyp4vKXcjOZPuzRdepwasq22LDm8OK0eME85SxV1IcTw0KxECNulL9HKrrah8YuzEq2maCcqSBTsm5z1v0t43l3pqD5Ws/FNRzpEQg8gCEKt8nGo10RGbiQ+2MiYKaXobfz2Fysbt6MPzQpqr6GZeQY40ZXRLLioWjw198k8= 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: On 25.03.24 06:42, syzbot wrote: > Hello, > > syzbot found the following issue on: > > HEAD commit: 707081b61156 Merge branch 'for-next/core', remote-tracking.. > git tree: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci > console output: https://syzkaller.appspot.com/x/log.txt?x=155105be180000 > kernel config: https://syzkaller.appspot.com/x/.config?x=caeac3f3565b057a > dashboard link: https://syzkaller.appspot.com/bug?extid=adb570fc6161d33edb01 > compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 > userspace arch: arm64 > > Unfortunately, I don't have any reproducer for this issue yet. > > Downloadable assets: > disk image: https://storage.googleapis.com/syzbot-assets/6cad68bf7532/disk-707081b6.raw.xz > vmlinux: https://storage.googleapis.com/syzbot-assets/1a27e5400778/vmlinux-707081b6.xz > kernel image: https://storage.googleapis.com/syzbot-assets/67dfc53755d0/Image-707081b6.gz.xz > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > Reported-by: syzbot+adb570fc6161d33edb01@syzkaller.appspotmail.com > > ------------[ cut here ]------------ > kernel BUG at include/linux/page-flags.h:314! > Internal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP > Modules linked in: > CPU: 0 PID: 12282 Comm: syz-executor.2 Not tainted 6.8.0-rc7-syzkaller-g707081b61156 #0 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024 > pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) > pc : folio_flags include/linux/page-flags.h:314 [inline] > pc : folio_test_hugetlb include/linux/page-flags.h:849 [inline] > pc : PageHuge+0x1f8/0x1fc mm/hugetlb.c:2173 > lr : folio_flags include/linux/page-flags.h:314 [inline] > lr : folio_test_hugetlb include/linux/page-flags.h:849 [inline] > lr : PageHuge+0x1f8/0x1fc mm/hugetlb.c:2173 > sp : ffff800097ca6d00 > x29: ffff800097ca6d00 x28: dfff800000000000 x27: fffffdffc318ac00 > x26: 00000000000000b0 x25: fffffdffc3188000 x24: 05ffc00000000840 > x23: 1fffffbff8631580 x22: 1fffffbff8631581 x21: dfff800000000000 > x20: 05ffc00000000000 x19: fffffdffc318ac00 x18: 1fffe000367fff96 > x17: ffff80008ec9d000 x16: ffff80008ad6b09c x15: 0000000000000001 > x14: 1ffff00012f94ce4 x13: 0000000000000000 x12: 0000000000000000 > x11: 0000000000040000 x10: 000000000003ffff x9 : ffff80009a5da000 > x8 : 0000000000040000 x7 : ffff800080297c0c x6 : 0000000000000000 > x5 : 0000000000000001 x4 : 0000000000000001 x3 : ffff800082f248d0 > x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000166 > Call trace: > folio_flags include/linux/page-flags.h:314 [inline] > folio_test_hugetlb include/linux/page-flags.h:849 [inline] > PageHuge+0x1f8/0x1fc mm/hugetlb.c:2173 > isolate_migratepages_block+0x7d8/0x2f9c mm/compaction.c:950 > isolate_migratepages mm/compaction.c:2074 [inline] > compact_zone+0x26a8/0x4120 mm/compaction.c:2530 > compact_node+0x234/0x3c0 mm/compaction.c:2851 > compact_nodes mm/compaction.c:2864 [inline] > sysctl_compaction_handler+0x110/0x1d4 mm/compaction.c:2910 > proc_sys_call_handler+0x4cc/0x7cc fs/proc/proc_sysctl.c:595 > proc_sys_write+0x2c/0x3c fs/proc/proc_sysctl.c:621 > call_write_iter include/linux/fs.h:2087 [inline] > iter_file_splice_write+0x894/0xfc0 fs/splice.c:743 > do_splice_from fs/splice.c:941 [inline] > direct_splice_actor+0xec/0x1d8 fs/splice.c:1164 > splice_direct_to_actor+0x438/0xa0c fs/splice.c:1108 > do_splice_direct_actor fs/splice.c:1207 [inline] > do_splice_direct+0x1e4/0x304 fs/splice.c:1233 > do_sendfile+0x460/0xb3c fs/read_write.c:1295 > __do_sys_sendfile64 fs/read_write.c:1356 [inline] > __se_sys_sendfile64 fs/read_write.c:1348 [inline] > __arm64_sys_sendfile64+0x23c/0x3b4 fs/read_write.c:1348 > __invoke_syscall arch/arm64/kernel/syscall.c:34 [inline] > invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:48 > el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:133 > do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:152 > el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:712 > el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730 > el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598 > Code: f0052f01 912c0021 aa1303e0 97fbce80 (d4210000) > ---[ end trace 0000000000000000 ]--- > > > --- > This report is generated by a bot. It may contain errors. > See https://goo.gl/tpsmEJ for more information about syzbot. > syzbot engineers can be reached at syzkaller@googlegroups.com. > > syzbot will keep track of this issue. See: > https://goo.gl/tpsmEJ#status for how to communicate with syzbot. > > If the report is already addressed, let syzbot know by replying with: > #syz fix: exact-commit-title #syz fix: mm: turn folio_test_hugetlb into a PageType -- Cheers, David / dhildenb