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AJvYcCWNElAfgTtlslQrmVn7XqgVAQ1OKGWEtJ6hvVxfYrK5VsIKq1t9F2Exvj/ryJ9EoDay44t+@lists.linux.dev X-Gm-Message-State: AOJu0YzNYaHeKBfrGSDutk8wHnkESBiDxOkbnBbTHTkPPLQIALAxNwzp BViwar1nTRCpoCtw4nVFazV+RTchvwNe+mmJoMC7K8DjSdQdpAPlJUWhEPaeUqlVdxOThobbGla 5BMl10AO4g8SqWajxPZb5MD4nBsKQZPsLjKrbVSwTcLaM0lJgsI+lmRTY0kQ= X-Google-Smtp-Source: AGHT+IGaaJMxXme2sTcpZbIFu0BKFYMoVUrXJ5eurk6w/mAhehGptwgqJxhLB+qU8I3c+YoZenSYX8hIckkkzoe8WoPQW/jUql/x Precedence: bulk X-Mailing-List: gfs2@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:2302:b0:3e2:91bb:c075 with SMTP id e9e14a558f8ab-3e4161990d4mr76743745ab.22.1754173168358; Sat, 02 Aug 2025 15:19:28 -0700 (PDT) Date: Sat, 02 Aug 2025 15:19:28 -0700 In-Reply-To: <683e2b6d.a00a0220.d8eae.005b.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <688e8ef0.050a0220.f0410.0144.GAE@google.com> Subject: Re: [syzbot] [gfs2?] kernel BUG in do_qc From: syzbot To: agruenba@redhat.com, gfs2@lists.linux.dev, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" syzbot has found a reproducer for the following issue on: HEAD commit: eacf91b0c78a Merge tag 'fbdev-for-6.17-rc1' of git://git.k.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=162a3834580000 kernel config: https://syzkaller.appspot.com/x/.config?x=bbdefbf39cb79f7e dashboard link: https://syzkaller.appspot.com/bug?extid=bad65435361712796381 compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10c03cf0580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=112a3834580000 Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-eacf91b0.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/51416a3bb992/vmlinux-eacf91b0.xz kernel image: https://storage.googleapis.com/syzbot-assets/aa2684a00ab0/bzImage-eacf91b0.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/d4ede27f2613/mount_1.gz fsck result: failed (log: https://syzkaller.appspot.com/x/fsck.log?x=151c7f82580000) IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+bad65435361712796381@syzkaller.appspotmail.com gfs2: fsid=syz:syz.0: first mount done, others may mount gfs2: fsid=syz:syz.0: found 1 quota changes gfs2: fsid=syz:syz.0: fatal assertion failed ------------[ cut here ]------------ kernel BUG at fs/gfs2/quota.c:320! Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI CPU: 0 UID: 0 PID: 5780 Comm: syz.0.38 Not tainted 6.16.0-syzkaller-11129-geacf91b0c78a #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:__qd_hold fs/gfs2/quota.c:320 [inline] RIP: 0010:do_qc+0x5c1/0x5e0 fs/gfs2/quota.c:705 Code: 00 00 00 00 00 fc ff df 48 8b 0c 24 80 3c 01 00 74 0a 48 8b 7c 24 10 e8 bd fd 28 fe 48 8b 44 24 10 48 8b 38 e8 70 e2 2e fd 90 <0f> 0b e8 f8 2b c4 fd 48 8b 7c 24 10 e8 5e e2 2e fd 90 0f 0b 66 66 RSP: 0018:ffffc9000d68f348 EFLAGS: 00010246 RAX: 000000000000002c RBX: 1ffff1100860680e RCX: 05e99f5eed550400 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: 0000000000000001 R08: ffffc9000d68f067 R09: 1ffff92001ad1e0c R10: dffffc0000000000 R11: fffff52001ad1e0d R12: ffff888043034000 R13: ffff888043034070 R14: ffff888043034090 R15: 0000000000000000 FS: 00007faa59d406c0(0000) GS:ffff88808d21f000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb33a2f7000 CR3: 000000003f713000 CR4: 0000000000352ef0 Call Trace: gfs2_quota_change+0x394/0x800 fs/gfs2/quota.c:1304 gfs2_alloc_blocks+0x18bc/0x2080 fs/gfs2/rgrp.c:2494 alloc_dinode+0x258/0x550 fs/gfs2/inode.c:422 gfs2_create_inode+0xbbc/0x1560 fs/gfs2/inode.c:807 gfs2_atomic_open+0xd2/0x220 fs/gfs2/inode.c:1395 atomic_open fs/namei.c:3568 [inline] lookup_open fs/namei.c:3679 [inline] open_last_lookups fs/namei.c:3807 [inline] path_openat+0xf63/0x3830 fs/namei.c:4043 do_filp_open+0x1fa/0x410 fs/namei.c:4073 do_sys_openat2+0x121/0x1c0 fs/open.c:1435 do_sys_open fs/open.c:1450 [inline] __do_sys_openat fs/open.c:1466 [inline] __se_sys_openat fs/open.c:1461 [inline] __x64_sys_openat+0x138/0x170 fs/open.c:1461 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7faa58f8eb69 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007faa59d40038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007faa591b5fa0 RCX: 00007faa58f8eb69 RDX: 0000000000105042 RSI: 0000200000000080 RDI: ffffffffffffff9c RBP: 00007faa59011df1 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000000001ff R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007faa591b5fa0 R15: 00007ffdf5ca1658 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__qd_hold fs/gfs2/quota.c:320 [inline] RIP: 0010:do_qc+0x5c1/0x5e0 fs/gfs2/quota.c:705 Code: 00 00 00 00 00 fc ff df 48 8b 0c 24 80 3c 01 00 74 0a 48 8b 7c 24 10 e8 bd fd 28 fe 48 8b 44 24 10 48 8b 38 e8 70 e2 2e fd 90 <0f> 0b e8 f8 2b c4 fd 48 8b 7c 24 10 e8 5e e2 2e fd 90 0f 0b 66 66 RSP: 0018:ffffc9000d68f348 EFLAGS: 00010246 RAX: 000000000000002c RBX: 1ffff1100860680e RCX: 05e99f5eed550400 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: 0000000000000001 R08: ffffc9000d68f067 R09: 1ffff92001ad1e0c R10: dffffc0000000000 R11: fffff52001ad1e0d R12: ffff888043034000 R13: ffff888043034070 R14: ffff888043034090 R15: 0000000000000000 FS: 00007faa59d406c0(0000) GS:ffff88808d21f000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb33a2f7000 CR3: 000000003f713000 CR4: 0000000000352ef0 --- 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.