RHEL 6/7 server crashes due to third party module 'fileaccess_mod'

Solution Verified - Updated -

Issue

  • System crashing due to null pointer in netlink_workQueue_msg() in fileaccess_mod third party kernel module per the kernel buffer logs :

    BUG: unable to handle kernel NULL pointer dereference at 0000000000000010
    IP: [<ffffffffa04b57c7>] netlink_workQueue_msg_send+0x127/0x780 [fileaccess_mod]
    PGD 0 
    Oops: 0000 [#1] SMP 
    last sysfs file: /sys/devices/system/cpu/online
    CPU 0 
    Modules linked in:  <snip>
    Pid: 3498, comm: nl_queue/0 Not tainted 2.6.32-642.6.2.el6.x86_64 #1 VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform
    RIP: 0010:[<ffffffffa04b57c7>]  [<ffffffffa04b57c7>] netlink_workQueue_msg_send+0x127/0x780 [fileaccess_mod]
    
  • System crashing due to null pointer in setAddrRW_sysCall() in fileaccess_mod third party kernel module per the kernel buffer logs :

    BUG: unable to handle kernel NULL pointer dereference at            (null)
    IP: [<ffffffffc0d24155>] setAddrRW_sysCall+0x25/0x60 [fileaccess_mod]
    PGD 0 
    Oops: 0000 [#1] SMP 
    Modules linked in:  <snip>
    CPU 0 PID: 4026 Comm: MA / LPC Client Kdump: loaded Tainted: G      OE ------------ 3.10.0-862.el7.x86_64 #1
    Hardware name: <snip>
    task: ffff9e3ee3ad2f70 ti:ffff89e3eca674000 task.ti: ffff9e2eca674000
    RIP: 0010:[<ffffffffc0d24155>] ti: [<ffffffffc0d24155>] setAddrRW_sysCall+0x25/0x60 [fileaccess_mod]
    
  • Server is crashing with NULL pointer dereference at 0000000000000090 in panic function doScan () of unsigned kernel module fileaccess_mod.

     BUG: unable to handle kernel NULL pointer dereference at 0000000000000090
     IP: [<ffffffffa03c2878>] doScan+0x2f8/0x860 [fileaccess_mod]
     PGD 10438e067 PUD 10111d067 PMD 0 
     Oops: 0000 [#1] SMP 
     last sysfs file: /sys/devices/pci0000:00/0000:00:16.0/0000:0b:00.0/net/eth1/address
     CPU 1 
     Modules linked in: fileaccess_mod(U) nls_utf8 vsock(U) vmci(U) autofs4 ipv6 sg microcode serio_raw e1000 vmware_balloon i2c_piix4 shpchp ext4 jbd2          mbcache sd_mod crc_t10dif sr_mod cdrom vmxnet3 vmw_pvscsi pata_acpi ata_generic ata_piix vmwgfx ttm drm_kms_helper drm i2c_core dm_mirror dm_region_hash dm_log dm_mod [last unloaded: fileaccess_mod]
    
     Pid: 23880, comm: filebeat Tainted: G           --L------------    2.6.32-642.6.2.el6.x86_64 #1 VMware, Inc. VMware Virtual Platform/440BX Desktop Reference        Platform
     RIP: 0010:[<ffffffffa03c2878>]  [<ffffffffa03c2878>] doScan+0x2f8/0x860 [fileaccess_mod]                ---->>>> Panic function
     RSP: 0018:ffff880102b47e88  EFLAGS: 00010282
     RAX: 0000000000000000 RBX: ffff88023479b880 RCX: 0000000000000000
    

Environment

  • Red Hat Enterprise Linux

  • Installed third party module 'fileaccess_mod'

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