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AJvYcCVtMaKiS8XawxRa3FskarZ5sFXLL6S3gWAka2mcZmw3g+Md4YWzdyiiQu4StYM515EMPrL1@lists.linux.dev X-Gm-Message-State: AOJu0YwP7eal0AGFuOBcGhUqvsSo/trdcKyav06gbf+N9nyZQFJrurOI D9G4EVCBNNZu25Rzjjzen6wTMMS8/cv8a4yfDCySZNUU6g7Xm3t8N81Av1w7sq2OdYWsyQUVO2C 6cBJpus7Ipg/cwhAMttN/O8YD/GQH9UDOeeUU5Z3ppDWG+5P2o+m1AUdR9h4= X-Google-Smtp-Source: AGHT+IHG73OdBF8cmM6aXt94Cd4FWPR95gSFPx77XZ8alCdtiFen2vBUAmbwXvHXI9npZrrfSgJe+M5+0XZewM5kAnBnrI4TMyU2 Precedence: bulk X-Mailing-List: gfs2@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6602:1555:b0:879:4aee:a88a with SMTP id ca18e2360f4ac-87977e9a6f7mr1821780439f.0.1752583503113; Tue, 15 Jul 2025 05:45:03 -0700 (PDT) Date: Tue, 15 Jul 2025 05:45:03 -0700 In-Reply-To: <76704579-e2a1-4000-8d0c-b3ccd429870d@redhat.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <68764d4f.a70a0220.693ce.000a.GAE@google.com> Subject: Re: [syzbot] [gfs2?] UBSAN: shift-out-of-bounds in gfs2_dir_read (2) From: syzbot To: agruenba@redhat.com, anprice@redhat.com, gfs2@lists.linux.dev, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: WARNING in move_to_new_folio ------------[ cut here ]------------ gfs2_meta_aops does not implement migrate_folio WARNING: CPU: 0 PID: 30 at mm/migrate.c:944 fallback_migrate_folio mm/migrate.c:942 [inline] WARNING: CPU: 0 PID: 30 at mm/migrate.c:944 move_to_new_folio+0x696/0x7a0 mm/migrate.c:996 Modules linked in: CPU: 0 UID: 0 PID: 30 Comm: kcompactd1 Not tainted 6.16.0-rc6-syzkaller-g155a3c003e55-dirty #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 2f 53 fe ff 48 8b 44 24 20 48 8b 30 48 c7 c7 20 bb 97 8b e8 cb b5 5e ff 90 <0f> 0b 90 90 49 bf 00 00 00 00 00 fc ff df e9 7e fd ff ff e8 e2 d2 RSP: 0018:ffffc90000516fd0 EFLAGS: 00010246 RAX: 0ac1efce833f5700 RBX: ffffea0000d5d100 RCX: ffff888030f20000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000002 RBP: 1ffff1100aaeabc5 R08: ffff88801fc24293 R09: 1ffff11003f84852 R10: dffffc0000000000 R11: ffffed1003f84853 R12: ffffea00015c8e00 R13: ffff888055755d08 R14: ffffea0000d5d108 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff88808d21b000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fffb6eacfe8 CR3: 0000000054de7000 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 compact_node+0x1d2/0x280 mm/compaction.c:2952 kcompactd+0xbc8/0x1290 mm/compaction.c:3250 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 Tested on: commit: 155a3c00 Merge tag 'for-6.16/dm-fixes-2' of git://git... git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=11eb8382580000 kernel config: https://syzkaller.appspot.com/x/.config?x=f62a2ef17395702a dashboard link: https://syzkaller.appspot.com/bug?extid=4708579bb230a0582a57 compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7 patch: https://syzkaller.appspot.com/x/patch.diff?x=150808f0580000