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AJvYcCV1nlFZKuIShIoMAZCqAhfy4D3n+EI3JPgC+c8uh3Bb1MJUPoqS3SfUfwaXCJloN6y2dnV2iUWxFRDKjIQ=@vger.kernel.org X-Gm-Message-State: AOJu0YxuZpaosQT73L9O9wmsvK9ySUbKHKtp7BlHyzCk/Dg7wWpM7gb4 IY6XAbcXiCcE7lXK+q44miL3+wXRFZbC7W+w2jEZm3ujly6+dqfZtIj50Nhe5PFPVONVVNQSdDh lC5OjA911YFI4YyMIEI+UR173a1xQ+9ZW3usf4mYN2YPre7/zc7uRq14= X-Google-Smtp-Source: AGHT+IGDqw7WgnYdk5D6tAW7YT74xX5xbJYKqTnlenf9RIgpgPz/CivP9CUkLawfFX8nH2LkNar3hyAuMKdtYNOPZqaa0bKIXTGr Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:12cc:b0:3a7:9736:501e with SMTP id e9e14a558f8ab-3a7c557d3afmr44988425ab.14.1732759043538; Wed, 27 Nov 2024 17:57:23 -0800 (PST) Date: Wed, 27 Nov 2024 17:57:23 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6747ce03.050a0220.253251.0066.GAE@google.com> Subject: [syzbot] [udf?] WARNING in udf_rmdir (2) From: syzbot To: jack@suse.com, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 228a1157fb9f Merge tag '6.13-rc-part1-SMB3-client-fixes' o.. git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=122c0778580000 kernel config: https://syzkaller.appspot.com/x/.config?x=402159daa216c89d dashboard link: https://syzkaller.appspot.com/bug?extid=5df2d3fa14f2d3e49305 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=14b476e8580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=162c0778580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/d32a8e8c5aae/disk-228a1157.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/28d5c070092e/vmlinux-228a1157.xz kernel image: https://storage.googleapis.com/syzbot-assets/45af4bfd9e8e/bzImage-228a1157.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/b7209c2fe94f/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+5df2d3fa14f2d3e49305@syzkaller.appspotmail.com UDF-fs: warning (device loop0): udf_rmdir: empty directory has nlink != 2 (0) UDF-fs: warning (device loop0): udf_rmdir: empty directory has nlink != 2 (0) ------------[ cut here ]------------ WARNING: CPU: 1 PID: 5834 at fs/inode.c:407 drop_nlink+0xc4/0x110 fs/inode.c:407 Modules linked in: CPU: 1 UID: 0 PID: 5834 Comm: syz-executor338 Not tainted 6.12.0-syzkaller-08446-g228a1157fb9f #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 RIP: 0010:drop_nlink+0xc4/0x110 fs/inode.c:407 Code: bb 70 07 00 00 be 08 00 00 00 e8 27 d8 e5 ff f0 48 ff 83 70 07 00 00 5b 41 5c 41 5e 41 5f 5d c3 cc cc cc cc e8 9d 40 7e ff 90 <0f> 0b 90 eb 83 44 89 e1 80 e1 07 80 c1 03 38 c1 0f 8c 5c ff ff ff RSP: 0018:ffffc90003f47ad0 EFLAGS: 00010293 RAX: ffffffff82170c43 RBX: 1ffff1100ed1c100 RCX: ffff88802d9c0000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: ffffffff82170bc3 R09: 1ffff920007e8ed8 R10: dffffc0000000000 R11: fffff520007e8ed9 R12: ffff8880768e0800 R13: ffff8880768e07b8 R14: ffff8880768e07b8 R15: dffffc0000000000 FS: 000055556e49b380(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000066c7e0 CR3: 000000003468a000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: inode_dec_link_count include/linux/fs.h:2521 [inline] udf_rmdir+0x3b8/0x6f0 fs/udf/namei.c:520 vfs_rmdir+0x3a3/0x510 fs/namei.c:4394 do_rmdir+0x3b5/0x580 fs/namei.c:4453 __do_sys_rmdir fs/namei.c:4472 [inline] __se_sys_rmdir fs/namei.c:4470 [inline] __x64_sys_rmdir+0x47/0x50 fs/namei.c:4470 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f6beb678a39 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 61 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:00007fffba3588d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 000000000000003d RCX: 00007f6beb678a39 RDX: 00007f6beb678a39 RSI: 00007f6beb678a39 RDI: 0000000020000000 RBP: 00007f6beb6ec610 R08: 00007fffba358aa8 R09: 00007fffba358aa8 R10: 00007fffba358aa8 R11: 0000000000000246 R12: 0000000000000001 R13: 00007fffba358a98 R14: 0000000000000001 R15: 0000000000000001 --- 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. 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