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 BhSj03qX j3mPe59L3rUYGSQVcqnJjTQIrmBz9FJxNfLAjxtxOlufaggm0IJmxtVu4LysNfjiDBQK7lTU8RHcYb6Ia5UJ+PcvlzX39t/i9/hfANPuca0UHeWq4DTGw7HPWInN/WqPxDCkpT5LhdrcRPDElvKNLfMdbGaNpxFQz9E5PyREiaSiKCW94MMjUmVvZZL6jnvOkROW5W4jY8pJiJN3MtUXnqqFrkGhka7pQDfAhafRPp6tpjSgzJFm7+FHM4pkwdFwrrj7qIOnMNuZ9cvJblbZ9HiZDrh5drYTell9o/eiyHv/gyIt8C3LqgKotxC5h4pleriumOerUhb0Iih3aoOlrizyfN3JEVIuHNMch 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 8 Jul 2025, at 13:51, syzbot wrote: > Hello, > > syzbot found the following issue on: > > HEAD commit: d7b8f8e20813 Linux 6.16-rc5 > git tree: upstream > console output: https://syzkaller.appspot.com/x/log.txt?x=3D16ff728c580= 000 > kernel config: https://syzkaller.appspot.com/x/.config?x=3Df6cfc972451= 00778 > dashboard link: https://syzkaller.appspot.com/bug?extid=3D3a24467a54701= 94c4175 > compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6= 049-1~exp1~20250616065826.132), Debian LLD 20.1.7 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=3D132adf705= 80000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=3D11ff728c580= 000 > > Downloadable assets: > disk image (non-bootable): https://storage.googleapis.com/syzbot-assets= /d900f083ada3/non_bootable_disk-d7b8f8e2.raw.xz > vmlinux: https://storage.googleapis.com/syzbot-assets/88e0e9607487/vmli= nux-d7b8f8e2.xz > kernel image: https://storage.googleapis.com/syzbot-assets/c0e31868d902= /bzImage-d7b8f8e2.xz > mounted in repro: https://storage.googleapis.com/syzbot-assets/02a26963= f634/mount_0.gz > fsck result: OK (log: https://syzkaller.appspot.com/x/fsck.log?x=3D15= 0e5582580000) > > IMPORTANT: if you fix the issue, please add the following tag to the co= mmit: > Reported-by: syzbot+3a24467a5470194c4175@syzkaller.appspotmail.com > > ------------[ cut here ]------------ > gfs2_meta_aops does not implement migrate_folio This warning is intended to make fs (e.g., gfs2) implement migrate_folio(= ) in their aops. gfs2_meta_aops and gfs2_rgrp_aops need the change. Should we change syzbot subsystem to fs? > WARNING: CPU: 0 PID: 30 at mm/migrate.c:944 fallback_migrate_folio mm/m= igrate.c:942 [inline] > WARNING: CPU: 0 PID: 30 at mm/migrate.c:944 move_to_new_folio+0x696/0x7= a0 mm/migrate.c:996 > Modules linked in: > CPU: 0 UID: 0 PID: 30 Comm: kcompactd1 Not tainted 6.16.0-rc5-syzkaller= #0 PREEMPT(full) > Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-= 1.16.3-2~bpo12+1 04/01/2014 > RIP: 0010:fallback_migrate_folio mm/migrate.c:942 [inline] > RIP: 0010:move_to_new_folio+0x696/0x7a0 mm/migrate.c:996 > Code: 0d 01 90 42 80 7c 3d 00 00 74 0a 48 8b 7c 24 20 e8 3f 53 fe ff 48= 8b 44 24 20 48 8b 30 48 c7 c7 80 b4 97 8b e8 bb b0 5e ff 90 <0f> 0b 90 9= 0 49 bf 00 00 00 00 00 fc ff df e9 7e fd ff ff e8 62 d0 > RSP: 0018:ffffc900005171d0 EFLAGS: 00010246 > RAX: 07a7b0ed2cfb0500 RBX: ffffea0000fecc00 RCX: ffff888030f20000 > RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000002 > RBP: 1ffff1100a4b8921 R08: ffff88801fc24293 R09: 1ffff11003f84852 > R10: dffffc0000000000 R11: ffffed1003f84853 R12: ffffea00012c1a80 > R13: ffff8880525c47e8 R14: ffffea0000fecc08 R15: dffffc0000000000 > FS: 0000000000000000(0000) GS:ffff88808d21d000(0000) knlGS:00000000000= 00000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 000000c0000cc000 CR3: 000000003fab7000 CR4: 0000000000352ef0 > Call Trace: > > migrate_folio_move mm/migrate.c:1301 [inline] > migrate_folios_move mm/migrate.c:1653 [inline] > migrate_pages_batch+0x1c34/0x2830 mm/migrate.c:1900 > migrate_pages_sync mm/migrate.c:1930 [inline] > migrate_pages+0x1bcc/0x2930 mm/migrate.c:2039 > compact_zone+0x23f4/0x4ad0 mm/compaction.c:2683 > kcompactd_do_work mm/compaction.c:3134 [inline] > kcompactd+0x97d/0x1290 mm/compaction.c:3228 > kthread+0x70e/0x8a0 kernel/kthread.c:464 > ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148 > ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 > > > > --- > 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 > > 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= =2E > > If you want to overwrite report's subsystems, reply with: > #syz set subsystems: new-subsystem > (See the list of subsystem names on the web dashboard) > > If the report is a duplicate of another one, reply with: > #syz dup: exact-subject-of-another-report > > If you want to undo deduplication, reply with: > #syz undup Best Regards, Yan, Zi