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AJvYcCWmlSvJKyl+ShGfrEo4rz6aaOFtOZ1XmGzmlSUtpQjJicIAGYa66f7ruCuqlvjYuQIE260hv0USX/+GwXI=@vger.kernel.org X-Gm-Message-State: AOJu0YzXRCMTX/yV9Jx9peSfW2hsdKiEbPQZx87PscjnzJLm57HpMmfz DIDJLjOi3RUy/0u0yuaJuH9OkTlrDg0Xh6iZ5mcoYSwuo7GRW1+VeKeKpzCntr3SQDRZo32by5J oXYCfZ7Om4SQI8VFSNxDc9368rUNVILZQ7Gn2JO4LnxOZ8QZsXirgj0I= X-Google-Smtp-Source: AGHT+IG4QAU2EqJ9IMvDB5KzRm+HHz1djsWGOEFznYlWvlJs2DPIEiNmQgC9qG0l++bJY/K9/YYnJjZ17Eq5LEa1dIJtZp/g+zQ/ Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:1f0e:b0:3d0:4e57:bbda with SMTP id e9e14a558f8ab-3d7ec1dc6d5mr85971475ab.1.1744525479665; Sat, 12 Apr 2025 23:24:39 -0700 (PDT) Date: Sat, 12 Apr 2025 23:24:39 -0700 In-Reply-To: <67faff52.050a0220.379d84.001b.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <67fb58a7.050a0220.379d84.001d.GAE@google.com> Subject: Re: [syzbot] [mm?] WARNING in move_to_new_folio From: syzbot To: akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" syzbot has found a reproducer for the following issue on: HEAD commit: 01c6df60d5d4 Add linux-next specific files for 20250411 git tree: linux-next console+strace: https://syzkaller.appspot.com/x/log.txt?x=111db870580000 kernel config: https://syzkaller.appspot.com/x/.config?x=db03cefa26ecf825 dashboard link: https://syzkaller.appspot.com/bug?extid=8bb6fd945af4e0ad9299 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10afca3f980000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=116f5c04580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/928246b3f3d5/disk-01c6df60.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/79a68c4e1134/vmlinux-01c6df60.xz kernel image: https://storage.googleapis.com/syzbot-assets/9caf8c293819/bzImage-01c6df60.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/9e5bb76a4272/mount_3.gz fsck result: failed (log: https://syzkaller.appspot.com/x/fsck.log?x=14ebd398580000) IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+8bb6fd945af4e0ad9299@syzkaller.appspotmail.com ------------[ cut here ]------------ jfs_metapage_aops does not implement migrate_folio WARNING: CPU: 1 PID: 5861 at mm/migrate.c:955 fallback_migrate_folio mm/migrate.c:953 [inline] WARNING: CPU: 1 PID: 5861 at mm/migrate.c:955 move_to_new_folio+0x70e/0x840 mm/migrate.c:1007 Modules linked in: CPU: 1 UID: 0 PID: 5861 Comm: syz-executor280 Not tainted 6.15.0-rc1-next-20250411-syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 RIP: 0010:fallback_migrate_folio mm/migrate.c:953 [inline] RIP: 0010:move_to_new_folio+0x70e/0x840 mm/migrate.c:1007 Code: b8 00 00 00 00 00 fc ff df 41 80 7c 05 00 00 74 08 4c 89 e7 e8 73 2d fe ff 49 8b 34 24 48 c7 c7 00 8b 57 8c e8 d3 0b 53 ff 90 <0f> 0b 90 90 e9 0a fd ff ff e8 74 f6 93 ff 90 0f 0b 90 eb a7 e8 69 RSP: 0018:ffffc90003f16b30 EFLAGS: 00010246 RAX: b07441ff5c2b4f00 RBX: 0000000000000000 RCX: ffff88803508bc00 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffea00008cc8c0 R08: ffffffff81829232 R09: fffffbfff1d7ab08 R10: dffffc0000000000 R11: fffffbfff1d7ab08 R12: ffff888075b9d130 R13: 1ffff1100eb73a26 R14: ffffffff8c839248 R15: ffff888075b9d010 FS: 0000555581ea4380(0000) GS:ffff888125080000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb8bd341e36 CR3: 000000003002a000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: migrate_folio_move mm/migrate.c:1312 [inline] migrate_folios_move mm/migrate.c:1664 [inline] migrate_pages_batch+0x1e86/0x30b0 mm/migrate.c:1911 migrate_pages_sync mm/migrate.c:1941 [inline] migrate_pages+0x1e13/0x3470 mm/migrate.c:2050 compact_zone+0x365d/0x4dd0 mm/compaction.c:2689 compact_node mm/compaction.c:2958 [inline] compact_nodes mm/compaction.c:2980 [inline] sysctl_compaction_handler+0x498/0x9a0 mm/compaction.c:3031 proc_sys_call_handler+0x54b/0x820 fs/proc/proc_sysctl.c:601 iter_file_splice_write+0xbdf/0x1530 fs/splice.c:738 do_splice_from fs/splice.c:935 [inline] direct_splice_actor+0x11b/0x220 fs/splice.c:1158 splice_direct_to_actor+0x595/0xc90 fs/splice.c:1102 do_splice_direct_actor fs/splice.c:1201 [inline] do_splice_direct+0x281/0x3d0 fs/splice.c:1227 do_sendfile+0x582/0x8d0 fs/read_write.c:1368 __do_sys_sendfile64 fs/read_write.c:1423 [inline] __se_sys_sendfile64+0x102/0x1e0 fs/read_write.c:1415 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f0011f6cc49 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 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:00007ffeb8797248 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f0011f6cc49 RDX: 0000200000000180 RSI: 0000000000000003 RDI: 0000000000000004 RBP: 00000000000f4240 R08: 0000555581ea5378 R09: 0000555581ea5378 R10: 000000000000000a R11: 0000000000000246 R12: 00000000000161d0 R13: 00007ffeb8797280 R14: 00007ffeb879726c R15: 00007f0011fb503b --- 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.