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### This program is free software; you can redistribute it and/or modify
## it under the terms of the GNU General Public License as published by
## the Free Software Foundation; either version 2 of the License, or
## (at your option) any later version.
## This program is distributed in the hope that it will be useful,
## but WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
## GNU General Public License for more details.
## You should have received a copy of the GNU General Public License
## along with this program; if not, write to the Free Software
## Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
import sos.plugintools
import commands, os, re
class kernel(sos.plugintools.PluginBase):
"""kernel related information
"""
optionList = [("modinfo", 'Gathers module information on all modules', 'fast', 1),
('sysrq', 'Trigger SysRq dumps', 'fast', 1)]
moduleFile = ""
taintList = [
{'regex':'mvfs*', 'description':'Clearcase module'},
{'regex':'vnode*', 'description':'Clearcase module'},
{'regex':'vxfs*', 'description':'Veritas file system module'},
{'regex':'vxportal*', 'description':'Veritas module'},
{'regex':'vxdmp*', 'description':'Veritas dynamic multipathing module'},
{'regex':'vxio*', 'description':'Veritas module'},
{'regex':'vxspec*"', 'description':'Veritas module'},
{'regex':'dcd*', 'description':'Dell OpenManage Server Administrator module'},
{'regex':'ocfs', 'description':'Oracle cluster filesystem module'},
{'regex':'oracle*', 'description':'Oracle module'},
{'regex':'vmnet*', 'description':'VMware module'},
{'regex':'vmmon*', 'description':'VMware module'},
{'regex':'egenera*', 'description':'Egenera module'},
{'regex':'emcp*', 'description':'EMC module'},
{'regex':'ocfs*', 'description':'OCFS module'},
{'regex':'nvidia', 'description':'NVidia module'},
{'regex':'ati-', 'description':'ATI module'}
]
# HP
#
#
def setup(self):
self.collectExtOutput("/bin/uname -a", root_symlink = "uname")
self.moduleFile = self.collectOutputNow("/sbin/lsmod", root_symlink = "lsmod")
if self.isOptionEnabled('modinfo'):
runcmd = ""
for kmod in commands.getoutput('/sbin/lsmod | /bin/cut -f1 -d" " 2>/dev/null | /bin/grep -v Module 2>/dev/null').split('\n'):
if '' != kmod.strip():
runcmd = runcmd + " " + kmod
if len(runcmd):
self.collectExtOutput("/sbin/modinfo " + runcmd)
self.collectExtOutput("/sbin/ksyms")
self.addCopySpec("/proc/filesystems")
self.addCopySpec("/proc/ksyms")
self.addCopySpec("/proc/slabinfo")
kver = commands.getoutput('/bin/uname -r')
depfile = "/lib/modules/%s/modules.dep" % (kver,)
self.addCopySpec(depfile)
self.addCopySpec("/etc/conf.modules")
self.addCopySpec("/etc/modules.conf")
self.addCopySpec("/etc/modprobe.conf")
self.collectExtOutput("/usr/sbin/dmidecode")
self.collectExtOutput("/usr/sbin/dkms status")
self.addCopySpec("/proc/cmdline")
self.addCopySpec("/proc/driver")
self.addCopySpec("/proc/sys/kernel/tainted")
# trigger some sysrq's. I'm not sure I like doing it this way, but
# since we end up with the sysrq dumps in syslog whether we run the
# syslog report before or after this, I suppose I can live with it.
if self.isOptionEnabled('sysrq') and os.access("/proc/sysrq-trigger", os.W_OK) and os.access("/proc/sys/kernel/sysrq", os.R_OK):
sysrq_state = commands.getoutput("/bin/cat /proc/sys/kernel/sysrq")
commands.getoutput("/bin/echo 1 > /proc/sys/kernel/sysrq")
for key in ['m', 'p', 't']:
commands.getoutput("/bin/echo %s > /proc/sysrq-trigger" % (key,))
commands.getoutput("/bin/echo %s > /proc/sys/kernel/sysrq" % (sysrq_state,))
# No need to grab syslog here if we can't trigger sysrq, so keep this
# inside the if
self.addCopySpec("/var/log/messages")
return
def analyze(self):
infd = open("/proc/modules", "r")
modules = infd.readlines()
infd.close()
for modname in modules:
modname=modname.split(" ")[0]
modinfo_srcver = commands.getoutput("/sbin/modinfo -F srcversion %s" % modname)
if not os.access("/sys/module/%s/srcversion" % modname, os.R_OK):
continue
infd = open("/sys/module/%s/srcversion" % modname, "r")
sys_srcver = infd.read().strip("\n")
infd.close()
if modinfo_srcver != sys_srcver:
self.addAlert("Loaded module %s differs from the one present on the file-system")
# this would be a good moment to check the module's signature
# but at the moment there's no easy way to do that outside of
# the kernel. i will probably need to write a C lib (derived from
# the kernel sources to do this verification.
savedtaint = os.path.join(self.cInfo['dstroot'], "/proc/sys/kernel/tainted")
infd = open(savedtaint, "r")
line = infd.read()
infd.close()
line = line.strip()
if (line != "0"):
self.addAlert("Kernel taint flag is <%s>\n" % line)
infd = open(self.moduleFile, "r")
modules = infd.readlines()
infd.close()
#print(modules)
for tainter in self.taintList:
p = re.compile(tainter['regex'])
for line in modules:
if p.match(line) != None:
# found a taint match, create an alert
moduleName = line.split()[0]
self.addAlert("Check for tainted kernel by module %s, which is %s" % (moduleName, tainter['description']))
return
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