Description of problem:
The mount.cifs utility generates a kernel stack dump and fails.

Version-Release number of selected component (if applicable):
kernel-3.13.4-200.fc20.i686
It also failed under kernel-3.13.3.  However, it works when I boot using kernel-3.12.10-300.fc20.i686.

How reproducible:  Always

Steps to Reproduce:
1.  # mount.cifs //cifs-server/sharename /mnt/cifs -o username=guest,guest

Actual results:
[   75.891735] FS-Cache: Loaded
[   75.897425] Key type dns_resolver registered
[   75.918821] FS-Cache: Netfs 'cifs' registered for caching
[   75.919092] Key type cifs.spnego registered
[   75.919171] Key type cifs.idmap registered
[   75.936375] ------------[ cut here ]------------
[   75.936470] WARNING: CPU: 0 PID: 1337 at fs/cifs/transport.c:313 smb_send_rqst+0x201/0x260 [cifs]()
[   75.936612] Send length mismatch(send_length=72 smb_buf_length=2164260932)
[   75.936721] Modules linked in: nls_utf8 cifs dns_resolver fscache coretemp kvm_intel kvm tg3 gpio_ich iTCO_wdt iTCO_vendor_support ptp ppdev pps_core serio_raw microcode i2c_i801 lpc_ich i5000_edac edac_core i5k_amb parport_pc parport raid1 radeon i2c_algo_bit drm_kms_helper ttm drm ata_generic i2c_core pata_acpi
[   75.937106] CPU: 0 PID: 1337 Comm: mount.cifs Tainted: G          I  3.13.4-200.fc20.i686 #1
[   75.937107] Hardware name: IBM IBM eServer x3400-[7973AC1]-/M97IP, BIOS IBM BIOS Version 1.62-[SPE162AUS-1.62]- 11/09/2007
[   75.937108]  00000000 00000000 eeec9d54 c09a6208 eeec9d94 eeec9d84 c0448dde f86d5c58
[   75.937113]  eeec9db0 00000539 f86c83c2 00000139 f86a7c31 f86a7c31 eeec9e10 81000044
[   75.937117]  eeec9dec eeec9d9c c0448e33 00000009 eeec9d94 f86d5c58 eeec9db0 eeec9de4
[   75.937121] Call Trace:
[   75.937122]  [<c09a6208>] dump_stack+0x41/0x52
[   75.937128]  [<c0448dde>] warn_slowpath_common+0x7e/0xa0
[   75.937132]  [<f86a7c31>] ? smb_send_rqst+0x201/0x260 [cifs]
[   75.937141]  [<f86a7c31>] ? smb_send_rqst+0x201/0x260 [cifs]
[   75.937149]  [<c0448e33>] warn_slowpath_fmt+0x33/0x40
[   75.937151]  [<f86a7c31>] smb_send_rqst+0x201/0x260 [cifs]
[   75.937160]  [<f86a7cbc>] smb_sendv+0x2c/0x40 [cifs]
[   75.937168]  [<f86a7cf1>] smb_send+0x21/0x30 [cifs]
[   75.937176]  [<f8693e54>] generic_ip_connect+0x2e4/0x3d0 [cifs]
[   75.937182]  [<f86976ea>] ? cifs_mount+0x10a/0x960 [cifs]
[   75.937189]  [<f8697c5f>] cifs_mount+0x67f/0x960 [cifs]
[   75.937195]  [<f8687ed6>] cifs_do_mount+0x86/0x480 [cifs]
[   75.937200]  [<c06347c1>] ? selinux_sb_copy_data+0x121/0x1d0
[   75.937204]  [<c055b771>] mount_fs+0x31/0x170
[   75.937207]  [<c05726c5>] vfs_kern_mount+0x45/0xc0
[   75.937210]  [<c05746a0>] do_mount+0x1e0/0x8d0
[   75.937212]  [<c05743af>] ? copy_mount_options+0x2f/0x100
[   75.937215]  [<c057502c>] SyS_mount+0x7c/0xb0
[   75.937218]  [<c09b354d>] sysenter_do_call+0x12/0x28
[   75.937221] ---[ end trace 569cec8a6e4bdfe1 ]---
[   75.939019] CIFS VFS: Error connecting to socket. Aborting operation.
[   75.973027] CIFS VFS: cifs_mount failed w/return code = -5
mount error(5): Input/output error
Refer to the mount.cifs(8) manual page (e.g. man mount.cifs)


Expected results:  The command should mount the CIFS volume.