CIFS: Attempting to mount \\127.0.0.1\test
CIFS: VFS: \\127.0.0.1 Error -104 sending data on socket to server
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WARNING: CPU: 0 PID: 4365 at fs/cifs/smb2ops.c:88 smb2_add_credits+0x8df/0x1370 fs/cifs/smb2ops.c:88
Modules linked in:
CPU: 0 PID: 4365 Comm: syz.1.18 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:smb2_add_credits+0x8df/0x1370 fs/cifs/smb2ops.c:88
Code: 02 00 00 03 2a 45 89 ef 41 29 ef 48 8b 44 24 38 42 0f b6 04 20 84 c0 0f 85 e1 02 00 00 44 89 3e e9 61 fb ff ff e8 f1 b0 02 ff <0f> 0b e9 42 f9 ff ff e8 e5 b0 02 ff c6 05 89 08 01 0b 01 48 c7 c7
RSP: 0018:ffffc900032cf3c8 EFLAGS: 00010293
RAX: ffffffff82764bbf RBX: ffff88807f72a224 RCX: ffff88807ab09dc0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 1ffff1100fee5445 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52000659e68 R12: ffff88807f72a22c
R13: 0000000000000200 R14: ffff88807f72a000 R15: 0000000000000000
FS:  00007f2b349856c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2b353727c0 CR3: 000000007961c000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 add_credits fs/cifs/cifsglob.h:745 [inline]
 compound_send_recv+0x1054/0x3290 fs/cifs/transport.c:1173
 cifs_send_recv+0x3c/0x50 fs/cifs/transport.c:1288
 SMB2_negotiate+0x1721/0x4390 fs/cifs/smb2pdu.c:930
 smb2_negotiate+0xdf/0x120 fs/cifs/smb2ops.c:395
 cifs_negotiate_protocol fs/cifs/connect.c:3811 [inline]
 cifs_get_smb_ses+0x890/0x2150 fs/cifs/connect.c:2056
 mount_get_conns+0xf8/0xe00 fs/cifs/connect.c:2996
 is_dfs_mount fs/cifs/connect.c:3354 [inline]
 cifs_mount+0x162/0x1380 fs/cifs/connect.c:3549
 cifs_smb3_do_mount+0x366/0x760 fs/cifs/cifsfs.c:895
 smb3_get_tree_common fs/cifs/fs_context.c:708 [inline]
 smb3_get_tree+0x59a/0xa80 fs/cifs/fs_context.c:726
 vfs_get_tree+0x88/0x270 fs/super.c:1530
 do_new_mount+0x247/0xa40 fs/namespace.c:3034
 do_mount fs/namespace.c:3377 [inline]
 __do_sys_mount fs/namespace.c:3585 [inline]
 __se_sys_mount+0x2e3/0x3d0 fs/namespace.c:3562
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f2b353250d9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f2b34985028 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f2b355acfa0 RCX: 00007f2b353250d9
RDX: 0000200000000240 RSI: 0000200000000200 RDI: 0000000000000000
RBP: 00007f2b353bc024 R08: 0000200000000300 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2b355ad038 R14: 00007f2b355acfa0 R15: 00007ffee5109bb8
 </TASK>