CIFS: Attempting to mount //127.0.0.1/share
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#2: syz.1.1517/11573
Modules linked in:
CPU: 2 UID: 0 PID: 11573 Comm: syz.1.1517 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:smb2_add_credits+0x1213/0x1790 fs/smb/client/smb2ops.c:104
Code: c6 e8 81 3d b7 fe 84 db 0f 85 0a fb ff ff e8 64 43 b7 fe 48 8d 3d ad e1 d7 0d 67 48 0f b9 3a e9 f4 fa ff ff e8 4e 43 b7 fe 90 <0f> 0b 90 0f b6 05 db 18 b8 0d 31 ff 89 c6 88 44 24 28 e8 46 3d b7
RSP: 0000:ffffc9000728f1e8 EFLAGS: 00010287
RAX: 0000000000004ed1 RBX: ffff88806bbe2300 RCX: ffffc9000cc94000
RDX: 0000000000080000 RSI: ffffffff83526ab2 RDI: ffff88801c7ba540
RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffc9000728f428
R13: 0000000000000200 R14: 0000000000000002 R15: ffff88806bbe2000
FS:  0000000000000000(0000) GS:ffff888096ddf000(0063) knlGS:00000000f53bdb40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 000000000c25bffd CR3: 000000007381d000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 add_credits fs/smb/client/cifsglob.h:894 [inline]
 compound_send_recv+0x1030/0x2a10 fs/smb/client/transport.c:979
 cifs_send_recv+0x43/0x60 fs/smb/client/transport.c:1106
 SMB2_negotiate+0x15c4/0x5380 fs/smb/client/smb2pdu.c:1188
 cifs_negotiate_protocol fs/smb/client/connect.c:4043 [inline]
 cifs_negotiate_protocol+0x268/0x4c0 fs/smb/client/connect.c:4014
 cifs_get_smb_ses+0xfc9/0x2170 fs/smb/client/connect.c:2492
 cifs_mount_get_session+0xf8/0x460 fs/smb/client/connect.c:3578
 get_session fs/smb/client/dfs.c:65 [inline]
 dfs_mount_share+0x200/0x1e20 fs/smb/client/dfs.c:275
 cifs_mount+0xc4/0xdb0 fs/smb/client/connect.c:3860
 cifs_smb3_do_mount+0x2c0/0x1b20 fs/smb/client/cifsfs.c:1024
 smb3_get_tree_common fs/smb/client/fs_context.c:897 [inline]
 smb3_get_tree fs/smb/client/fs_context.c:917 [inline]
 smb3_get_tree+0x1fd/0x440 fs/smb/client/fs_context.c:909
 vfs_get_tree+0x92/0x320 fs/super.c:1700
 fc_mount fs/namespace.c:1198 [inline]
 do_new_mount_fc fs/namespace.c:3765 [inline]
 do_new_mount fs/namespace.c:3841 [inline]
 path_mount+0x7d0/0x23d0 fs/namespace.c:4161
 do_mount fs/namespace.c:4174 [inline]
 __do_sys_mount fs/namespace.c:4390 [inline]
 __se_sys_mount fs/namespace.c:4367 [inline]
 __ia32_sys_mount+0x292/0x310 fs/namespace.c:4367
 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline]
 __do_fast_syscall_32+0xe7/0x970 arch/x86/entry/syscall_32.c:307
 do_fast_syscall_32+0x32/0x70 arch/x86/entry/syscall_32.c:332
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf6fcefec
Code: Unable to access opcode bytes at 0xf6fcefc2.
RSP: 002b:00000000f53bd50c EFLAGS: 00000292 ORIG_RAX: 0000000000000015
RAX: ffffffffffffffda RBX: 0000000080000200 RCX: 0000000080000300
RDX: 0000000080000400 RSI: 0000000000000000 RDI: 0000000080000500
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000292 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>