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AHgh+RpTme7feyRfj/9HBWaRHz9EohWJXD4FOZx7wwOnz0ZtlzDjZnvdpvPbSxI8SD+lmfHLXEP/We7mDkpZ@vger.kernel.org X-Gm-Message-State: AOJu0YyxIbt5OFf4YbKTNjEuYQeyzwLXhLZcmhBQbCmyf0DJxrQ8r0iV fm9fH7NAXrOTOtx6I1T0RBUqFBv86Z+F8Iu1mZnsjXkNIN7CVJg5lPAx9fyUs7XoP0o0oxD7wiF s7pozJNIfvxU1BjV0LxLyDytGXsBIMlznE0X9qW2LuQzxfXbVVElkVAp9XyA= Precedence: bulk X-Mailing-List: linux-cifs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6808:5242:b0:4ae:f5be:fe30 with SMTP id 5614622812f47-4af5e2eacc9mr3827298b6e.18.1785544535088; Fri, 31 Jul 2026 17:35:35 -0700 (PDT) Date: Fri, 31 Jul 2026 17:35:35 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a6d3f57.6ce73036.24301b.000f.GAE@google.com> Subject: [syzbot] [cifs?] WARNING in smb2_add_credits From: syzbot To: bharathsm@microsoft.com, linux-cifs@vger.kernel.org, linux-kernel@vger.kernel.org, pc@manguebit.org, ronniesahlberg@gmail.com, samba-technical@lists.samba.org, sfrench@samba.org, sprasad@microsoft.com, syzkaller-bugs@googlegroups.com, tom@talpey.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: f5098b6bae76 Linux 7.2-rc5 git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=17d5d1b9580000 kernel config: https://syzkaller.appspot.com/x/.config?x=145fa60d73086782 dashboard link: https://syzkaller.appspot.com/bug?extid=eeb58d2197d88720a228 compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12299632580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/2113dcf433f6/disk-f5098b6b.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/413e673b7de4/vmlinux-f5098b6b.xz kernel image: https://storage.googleapis.com/syzbot-assets/fc40c1b83e80/bzImage-f5098b6b.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+eeb58d2197d88720a228@syzkaller.appspotmail.com CIFS: VFS: \\127.0.0.1 Error -104 sending data on socket to server ------------[ cut here ]------------ server->in_flight == 0 WARNING: fs/smb/client/smb2ops.c:104 at smb2_add_credits+0x1213/0x1790 fs/smb/client/smb2ops.c:104, CPU#0: syz.2.443/8120 Modules linked in: CPU: 0 UID: 0 PID: 8120 Comm: syz.2.443 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026 RIP: 0010:smb2_add_credits+0x1213/0x1790 fs/smb/client/smb2ops.c:104 Code: c6 e8 21 ea b5 fe 84 db 0f 85 0a fb ff ff e8 04 f0 b5 fe 48 8d 3d ad 9f d5 0d 67 48 0f b9 3a e9 f4 fa ff ff e8 ee ef b5 fe 90 <0f> 0b 90 0f b6 05 87 d6 b5 0d 31 ff 89 c6 88 44 24 28 e8 e6 e9 b5 RSP: 0018:ffffc90005cbf2d8 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffff88805d5ee300 RCX: ffffffff835460db RDX: ffff88801c79ca80 RSI: ffffffff83547052 RDI: ffff88801c79ca80 RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffffc90005cbf518 R13: 0000000000000200 R14: 0000000000000002 R15: ffff88805d5ee000 FS: 00007f783f8496c0(0000) GS:ffff888123ddc000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000077f4543a020 CR3: 000000002b566000 CR4: 00000000003526f0 Call Trace: add_credits fs/smb/client/cifsglob.h:894 [inline] compound_send_recv+0x1030/0x2a10 fs/smb/client/transport.c:979 --- 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