System panic in bcanput() from the `strmfs_mod` module

Issue

• System panic in bcanput()

  <1>BUG: unable to handle kernel NULL pointer dereference at 0000000000000018
  <4>(c7m3uart @ Q 0x326110000) [C7a.L3RT @ 17708028] close
  <1>IP: [<ffffffffa0348d7e>] bcanput+0x2e/0xc0 [strmfs_mod]
  <4>PGD e815ec067 PUD e81657067 PMD 0
  <4>Oops: 0000 [#1] SMP
  <4>last sysfs file: /sys/devices/pci0000:00/0000:00:02.0/0000:02:00.0/host0/target0:0:0/0:0:0:2/block/sdc/uevent
  <4>CPU 1
  <4>Modules linked in: bluetooth rfkill vfat fat usb_storage iptable_mangle iptable_nat nf_nat nf_conntrack_ipv4 nf_conntrack nf_defrag_ipv4 ip_tables bridge mptctl   mptbase ulcm_kmem(P)(U) strmfs_mod(U) autofs4 target_core_iblock target_core_file target_core_pscsi target_core_mod configfs bnx2fc cnic uio fcoe libfcoe libfc scsi_transport_fc scsi_tgt sunrpc cpufreq_ondemand freq_table pcc_cpufreq cachefiles fscache(T) bonding 8021q garp stp llc ipv6 uinput microcode power_meter iTCO_wdt iTCO_vendor_support serio_raw sg lpc_ich mfd_core hpilo hpwdt tg3 ptp pps_core ext4 jbd2 mbcache sd_mod crc_t10dif hpsa wmi dm_mirror dm_region_hash dm_log dm_mod [last unloaded: scsi_wait_scan]
  <4>
  <4>Pid: 27682, comm: usam_daemon Tainted: P           ---------------  T 2.6.32-431.el6.x86_64 #1 HP ProLiant DL580 Gen8
  <4>RIP: 0010:[<ffffffffa0348d7e>]  [<ffffffffa0348d7e>] bcanput+0x2e/0xc0 [strmfs_mod]
  <4>RSP: 0018:ffff880eaa605ba8  EFLAGS: 00010092
  <4>RAX: 0000000000000286 RBX: ffff88069de81280 RCX: 0000000000000333
  <4>RDX: 0000000000000286 RSI: 0000000000000000 RDI: 0000000000000000
  <4>RBP: ffff880eaa605bc8 R08: 0000000000000246 R09: 0000006131637561
  <4>R10: 0000000000000040 R11: 0000000000000206 R12: 0000000000000000
  <4>R13: 0000000000000000 R14: ffff8806a5a8e180 R15: 0000000000012172
  <4>FS:  00007fe582328720(0000) GS:ffff880045820000(0000) knlGS:0000000000000000
  <4>CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  <4>CR2: 0000000000000018 CR3: 0000000ea48c8000 CR4: 00000000001407e0
  <4>DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
  <4>DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
  <4>Process usam_daemon (pid: 27682, threadinfo ffff880eaa604000, task ffff880e81420ae0)
  <4>Stack:
  <4> ffff880eaa605bd8 ffff88069de81280 ffffc90017afdcb8 ffff88069316b890
  <4><d> ffff880eaa605bd8 ffffffffa0348e20 ffff8808716dde80 ffffffffa037a23e
  <4><d> 0000000000000286 ffff8808716dde80 ffff88069316b890 ffff88069de81280
  <4>Call Trace:
  <4> [<ffffffffa0348e20>] canput+0x10/0x20 [strmfs_mod]
  <4> [<ffffffffa037a23e>] momMuxIoctlMsgType_f+0xe5/0x16d [strmfs_mod]
  <4> [<ffffffffa037d93a>] ? momUWPut+0x2f6/0x4de [strmfs_mod]
  <4> [<ffffffffa0349158>] ? putnext+0x38/0x40 [strmfs_mod]
  <4> [<ffffffffa034ae35>] ? strmhd_wsrv+0x45/0x90 [strmfs_mod]
  <4> [<ffffffffa0351243>] ? stream_scheduler_function+0x1c3/0x390 [strmfs_mod]
  <4> [<ffffffffa0349958>] ? putq+0x1e8/0x2d0 [strmfs_mod]
  <4> [<ffffffffa0349bb5>] ? put+0x175/0x190 [strmfs_mod]
  <4> [<ffffffffa034c4bc>] ? internal_istrProcessing+0x19c/0x430 [strmfs_mod]
  <4> [<ffffffff8114b28a>] ? handle_mm_fault+0x22a/0x300
  <4> [<ffffffffa034c791>] ? istrProcessing+0x41/0x50 [strmfs_mod]
  <4> [<ffffffffa03504be>] ? strm_ioctl+0x37e/0x3e0 [strmfs_mod]
  <4> [<ffffffff8119db42>] ? vfs_ioctl+0x22/0xa0
  <4> [<ffffffff8119dce4>] ? do_vfs_ioctl+0x84/0x580
  <4> [<ffffffff81019f19>] ? ftrace_raw_event_sys_enter+0xd9/0x130
  <4> [<ffffffff8119e261>] ? sys_ioctl+0x81/0xa0
  <4> [<ffffffff8100b288>] ? tracesys+0xd9/0xde
  <4>Code: e5 41 55 41 54 53 48 83 ec 08 0f 1f 44 00 00 41 89 f5 49 89 fc eb 14 66 0f 1f 44 00 00 49 8b 14 24 48 83 7a 08 00 75 0d 49 89 c4 <49> 8b 44 24 18 48 85 c0 75 e8 49 8d 9c 24 68 38 00 00 48 89 df
  <1>RIP  [<ffffffffa0348d7e>] bcanput+0x2e/0xc0 [strmfs_mod] <<-----PANICKED HERE
  <4> RSP <ffff880eaa605ba8>
  <4>CR2: 0000000000000018