CIFS: Attempting to mount //127.0.0.1/share
------------[ 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#1: syz.5.4605/20287
Modules linked in:
CPU: 1 UID: 0 PID: 20287 Comm: syz.5.4605 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/05/2026
RIP: 0010:smb2_add_credits+0x1213/0x1790 fs/smb/client/smb2ops.c:104
Code: c6 e8 b1 67 b1 fe 84 db 0f 85 0a fb ff ff e8 94 6d b1 fe 48 8d 3d ed 14 f2 0d 67 48 0f b9 3a e9 f4 fa ff ff e8 7e 6d b1 fe 90 <0f> 0b 90 0f b6 05 29 8f d2 0d 31 ff 89 c6 88 44 24 28 e8 76 67 b1
RSP: 0018:ffffc90003147208 EFLAGS: 00010287
RAX: 0000000000003c72 RBX: ffff88802a762300 RCX: ffffc90019ac2000
RDX: 0000000000080000 RSI: ffffffff835a9e72 RDI: ffff8880372cbe80
RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffc90003147448
R13: 0000000000000200 R14: 0000000000000001 R15: ffff88802a762000
FS:  00007fa82a6b36c0(0000) GS:ffff888123c56000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007efff0cbae9c CR3: 000000006603a000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 add_credits fs/smb/client/cifsglob.h:894 [inline]
 compound_send_recv+0x1030/0x2a10 fs/smb/client/transport.c:978
 cifs_send_recv+0x43/0x60 fs/smb/client/transport.c:1105
 SMB2_negotiate+0x15c4/0x5380 fs/smb/client/smb2pdu.c:1188
 cifs_negotiate_protocol fs/smb/client/connect.c:4040 [inline]
 cifs_negotiate_protocol+0x268/0x4c0 fs/smb/client/connect.c:4011
 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+0x2c0/0x1b10 fs/smb/client/cifsfs.c:1026
 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:1947
 fc_mount fs/namespace.c:1198 [inline]
 do_new_mount_fc fs/namespace.c:3772 [inline]
 do_new_mount fs/namespace.c:3848 [inline]
 path_mount+0x7d0/0x24c0 fs/namespace.c:4168
 do_mount fs/namespace.c:4181 [inline]
 __do_sys_mount fs/namespace.c:4397 [inline]
 __se_sys_mount fs/namespace.c:4374 [inline]
 __x64_sys_mount+0x293/0x310 fs/namespace.c:4374
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x123/0x790 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa82979e159
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:00007fa82a6b3028 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fa829a25fa0 RCX: 00007fa82979e159
RDX: 0000200000000200 RSI: 0000200000000100 RDI: 0000200000000500
RBP: 00007fa82983503b R08: 0000200000000300 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa829a26038 R14: 00007fa829a25fa0 R15: 00007ffc258f7508
 </TASK>