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AJvYcCWLO4XZvBTuuoZCLUUVtiHnJYemaD3qASAWLVWZwTvNHA/oNkyqJI/E/X8NbaIo00joosgYwu3CYeXQ@vger.kernel.org X-Gm-Message-State: AOJu0YwnvoTZvpujQ7hd7LbOyFPSrJTYYmd3JdkP1b9FcNdKoKrtmNw3 D4my+ljfQtWTc/0M3BEfSa7Mj3JcBvYRDd3tzt6KaWpoVgTNAOnnZ43beRlVG+o2HOhTisoQ8y3 zl60OYstOjwWomxKuztAmVvDUB2Wb/8lGB82UTwqJFo1NjtmEcDdSxqhtUM4= X-Google-Smtp-Source: AGHT+IHIwms0CBlclfEP762gb3HSmOTXv+nfCV7EKukKEdvS5ODM4IecXCP+5KGxqYRP+I3iJhND3FNZ2XHx/rEJ0dfHFloWlJQL Precedence: bulk X-Mailing-List: linux-ext4@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:3192:b0:3dd:d1bc:f08c with SMTP id e9e14a558f8ab-3e1670fe7f6mr68367135ab.20.1752140907815; Thu, 10 Jul 2025 02:48:27 -0700 (PDT) Date: Thu, 10 Jul 2025 02:48:27 -0700 In-Reply-To: <686a8143.a00a0220.c7b3.005b.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <686f8c6b.a00a0220.26a83e.000e.GAE@google.com> Subject: Re: [syzbot] [ext4?] WARNING in bdev_getblk From: syzbot To: adilger.kernel@dilger.ca, jfs-discussion@lists.sourceforge.net, linkinjeon@kernel.org, linux-ext4@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, shaggy@kernel.org, sj1557.seo@samsung.com, syzkaller-bugs@googlegroups.com, tytso@mit.edu Content-Type: text/plain; charset="UTF-8" syzbot has found a reproducer for the following issue on: HEAD commit: 835244aba90d Add linux-next specific files for 20250709 git tree: linux-next console+strace: https://syzkaller.appspot.com/x/log.txt?x=10535a8c580000 kernel config: https://syzkaller.appspot.com/x/.config?x=8396fd456733c122 dashboard link: https://syzkaller.appspot.com/bug?extid=01ef7a8da81a975e1ccd 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=115c40f0580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=11856a8c580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/e5c5711c47f9/disk-835244ab.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/dd2453f9f672/vmlinux-835244ab.xz kernel image: https://storage.googleapis.com/syzbot-assets/a81cc03651e7/bzImage-835244ab.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/e3888e058fbc/mount_0.gz fsck result: OK (log: https://syzkaller.appspot.com/x/fsck.log?x=12856a8c580000) IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+01ef7a8da81a975e1ccd@syzkaller.appspotmail.com ------------[ cut here ]------------ WARNING: fs/buffer.c:1125 at __getblk_slow fs/buffer.c:1125 [inline], CPU#0: syz-executor261/5880 WARNING: fs/buffer.c:1125 at bdev_getblk+0x580/0x660 fs/buffer.c:1461, CPU#0: syz-executor261/5880 Modules linked in: CPU: 0 UID: 0 PID: 5880 Comm: syz-executor261 Not tainted 6.16.0-rc5-next-20250709-syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:__getblk_slow fs/buffer.c:1125 [inline] RIP: 0010:bdev_getblk+0x580/0x660 fs/buffer.c:1461 Code: 26 fb ff ff e8 81 ee 78 ff 48 c7 c7 20 08 9a 8b 48 c7 c6 02 1b a0 8d 4c 89 fa 4c 89 e9 e8 38 d7 e0 fe eb bd e8 61 ee 78 ff 90 <0f> 0b 90 48 b8 00 00 00 00 00 fc ff df 41 80 3c 07 00 74 08 48 89 RSP: 0018:ffffc9000403f620 EFLAGS: 00010293 RAX: ffffffff8246c6ff RBX: ffff888022d0b998 RCX: ffff888078b31e00 RDX: 0000000000000000 RSI: 0000000000000400 RDI: 0000000000000000 RBP: 0000000000000400 R08: ffff888078b31e00 R09: 0000000000000003 R10: 0000000000000406 R11: 0000000000000000 R12: dffffc0000000000 R13: ffff888022d0b980 R14: 0000000000000400 R15: 1ffff110045a1733 FS: 000055558d712380(0000) GS:ffff888125bd4000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f5b0e5d6000 CR3: 00000000227ea000 CR4: 00000000003526f0 Call Trace: ext4_sb_breadahead_unmovable+0x6f/0xf0 fs/ext4/super.c:270 __ext4_get_inode_loc+0xcc9/0x1040 fs/ext4/inode.c:4879 __ext4_get_inode_loc_noinmem fs/ext4/inode.c:4909 [inline] __ext4_iget+0x450/0x4260 fs/ext4/inode.c:5168 __ext4_fill_super fs/ext4/super.c:5500 [inline] ext4_fill_super+0x4592/0x6080 fs/ext4/super.c:5724 get_tree_bdev_flags+0x40e/0x4d0 fs/super.c:1681 vfs_get_tree+0x8f/0x2b0 fs/super.c:1804 do_new_mount+0x2a2/0x9e0 fs/namespace.c:3805 do_mount fs/namespace.c:4133 [inline] __do_sys_mount fs/namespace.c:4344 [inline] __se_sys_mount+0x317/0x410 fs/namespace.c:4321 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: 0033:0x7f457044b7da Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 5e 04 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 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:00007ffd924f6f58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007ffd924f6f70 RCX: 00007f457044b7da RDX: 0000200000000040 RSI: 0000200000000000 RDI: 00007ffd924f6f70 RBP: 0000200000000000 R08: 00007ffd924f6fb0 R09: 00007ffd924f6fb0 R10: 000000000000088e R11: 0000000000000246 R12: 0000200000000040 R13: 00007ffd924f6fb0 R14: 0000000000000003 R15: 000000000000088e --- 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.