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  1. 20 3月, 2014 2 次提交
    • R
      audit: rename the misleading audit_get_context() to audit_take_context() · 4a3eb726
      由 Richard Guy Briggs 提交于 
      "get" usually implies incrementing a refcount into a structure to indicate a
reference being held by another part of code.

Change this function name to indicate it is in fact being taken from it,
returning the value while clearing it in the supplying structure.
Signed-off-by: NRichard Guy Briggs <rgb@redhat.com>
      4a3eb726
    • W
      audit: Audit proc/<pid>/cmdline aka proctitle · 3f1c8250
      由 William Roberts 提交于 
      During an audit event, cache and print the value of the process's
proctitle value (proc/<pid>/cmdline). This is useful in situations
where processes are started via fork'd virtual machines where the
comm field is incorrect. Often times, setting the comm field still
is insufficient as the comm width is not very wide and most
virtual machine "package names" do not fit. Also, during execution,
many threads have their comm field set as well. By tying it back to
the global cmdline value for the process, audit records will be more
complete in systems with these properties. An example of where this
is useful and applicable is in the realm of Android. With Android,
their is no fork/exec for VM instances. The bare, preloaded Dalvik
VM listens for a fork and specialize request. When this request comes
in, the VM forks, and the loads the specific application (specializing).
This was done to take advantage of COW and to not require a load of
basic packages by the VM on very app spawn. When this spawn occurs,
the package name is set via setproctitle() and shows up in procfs.
Many of these package names are longer then 16 bytes, the historical
width of task->comm. Having the cmdline in the audit records will
couple the application back to the record directly. Also, on my
Debian development box, some audit records were more useful then
what was printed under comm.

The cached proctitle is tied to the life-cycle of the audit_context
structure and is built on demand.

Proctitle is controllable by userspace, and thus should not be trusted.
It is meant as an aid to assist in debugging. The proctitle event is
emitted during syscall audits, and can be filtered with auditctl.

Example:
type=AVC msg=audit(1391217013.924:386): avc:  denied  { getattr } for  pid=1971 comm="mkdir" name="/" dev="selinuxfs" ino=1 scontext=system_u:system_r:consolekit_t:s0-s0:c0.c255 tcontext=system_u:object_r:security_t:s0 tclass=filesystem
type=SYSCALL msg=audit(1391217013.924:386): arch=c000003e syscall=137 success=yes exit=0 a0=7f019dfc8bd7 a1=7fffa6aed2c0 a2=fffffffffff4bd25 a3=7fffa6aed050 items=0 ppid=1967 pid=1971 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=4294967295 comm="mkdir" exe="/bin/mkdir" subj=system_u:system_r:consolekit_t:s0-s0:c0.c255 key=(null)
type=UNKNOWN[1327] msg=audit(1391217013.924:386):  proctitle=6D6B646972002D70002F7661722F72756E2F636F6E736F6C65

Acked-by: Steve Grubb <sgrubb@redhat.com> (wrt record formating)
Signed-off-by: NWilliam Roberts <wroberts@tresys.com>
Signed-off-by: NEric Paris <eparis@redhat.com>
      3f1c8250
  3. 08 3月, 2014 1 次提交
  5. 14 1月, 2014 6 次提交
  7. 07 11月, 2013 1 次提交
    • E
      audit: fix type of sessionid in audit_set_loginuid() · 9175c9d2
      由 Eric Paris 提交于 
      sfr pointed out that with CONFIG_UIDGID_STRICT_TYPE_CHECKS set the audit
tree would not build.  This is because the oldsessionid in
audit_set_loginuid() was accidentally being declared as a kuid_t.  This
patch fixes that declaration mistake.

Example of problem:
kernel/auditsc.c: In function 'audit_set_loginuid':
kernel/auditsc.c:2003:15: error: incompatible types when assigning to
type 'kuid_t' from type 'int'
  oldsessionid = audit_get_sessionid(current);
Reported-by: NStephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: NEric Paris <eparis@redhat.com>
      9175c9d2
  9. 06 11月, 2013 11 次提交
  11. 10 7月, 2013 1 次提交
    • J
      audit: fix mq_open and mq_unlink to add the MQ root as a hidden parent audit_names record · 79f6530c
      由 Jeff Layton 提交于 
      The old audit PATH records for mq_open looked like this:

  type=PATH msg=audit(1366282323.982:869): item=1 name=(null) inode=6777
  dev=00:0c mode=041777 ouid=0 ogid=0 rdev=00:00
  obj=system_u:object_r:tmpfs_t:s15:c0.c1023
  type=PATH msg=audit(1366282323.982:869): item=0 name="test_mq" inode=26732
  dev=00:0c mode=0100700 ouid=0 ogid=0 rdev=00:00
  obj=staff_u:object_r:user_tmpfs_t:s15:c0.c1023

...with the audit related changes that went into 3.7, they now look like this:

  type=PATH msg=audit(1366282236.776:3606): item=2 name=(null) inode=66655
  dev=00:0c mode=0100700 ouid=0 ogid=0 rdev=00:00
  obj=staff_u:object_r:user_tmpfs_t:s15:c0.c1023
  type=PATH msg=audit(1366282236.776:3606): item=1 name=(null) inode=6926
  dev=00:0c mode=041777 ouid=0 ogid=0 rdev=00:00
  obj=system_u:object_r:tmpfs_t:s15:c0.c1023
  type=PATH msg=audit(1366282236.776:3606): item=0 name="test_mq"

Both of these look wrong to me.  As Steve Grubb pointed out:

 "What we need is 1 PATH record that identifies the MQ.  The other PATH
  records probably should not be there."

Fix it to record the mq root as a parent, and flag it such that it
should be hidden from view when the names are logged, since the root of
the mq filesystem isn't terribly interesting.  With this change, we get
a single PATH record that looks more like this:

  type=PATH msg=audit(1368021604.836:484): item=0 name="test_mq" inode=16914
  dev=00:0c mode=0100644 ouid=0 ogid=0 rdev=00:00
  obj=unconfined_u:object_r:user_tmpfs_t:s0

In order to do this, a new audit_inode_parent_hidden() function is
added.  If we do it this way, then we avoid having the existing callers
of audit_inode needing to do any sort of flag conversion if auditing is
inactive.
Signed-off-by: NJeff Layton <jlayton@redhat.com>
Reported-by: NJiri Jaburek <jjaburek@redhat.com>
Cc: Steve Grubb <sgrubb@redhat.com>
Cc: Eric Paris <eparis@redhat.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      79f6530c
  13. 08 5月, 2013 1 次提交
  15. 01 5月, 2013 2 次提交
  17. 30 4月, 2013 1 次提交
  19. 16 4月, 2013 1 次提交
  21. 12 4月, 2013 1 次提交
    • E
      Audit: do not print error when LSMs disabled · ad395abe
      由 Eric Paris 提交于 
      RHBZ: 785936

If the audit system collects a record about one process sending a signal
to another process it includes in that collection the 'secid' or 'an int
used to represet an LSM label.'  If there is no LSM enabled it will
collect a 0.  The problem is that when we attempt to print that record
we ask the LSM to convert the secid back to a string.  Since there is no
LSM it returns EOPNOTSUPP.

Most code in the audit system checks if the secid is 0 and does not
print LSM info in that case.  The signal information code however forgot
that check.  Thus users will see a message in syslog indicating that
converting the sid to string failed.  Add the right check.
Signed-off-by: NEric Paris <eparis@redhat.com>
      ad395abe
  23. 11 4月, 2013 4 次提交
  25. 09 4月, 2013 1 次提交
  27. 12 1月, 2013 2 次提交
  29. 29 11月, 2012 1 次提交
  31. 25 10月, 2012 1 次提交
  33. 13 10月, 2012 3 次提交
    • J
      audit: make audit_inode take struct filename · adb5c247
      由 Jeff Layton 提交于 
      Keep a pointer to the audit_names "slot" in struct filename.

Have all of the audit_inode callers pass a struct filename ponter to
audit_inode instead of a string pointer. If the aname field is already
populated, then we can skip walking the list altogether and just use it
directly.
Signed-off-by: NJeff Layton <jlayton@redhat.com>
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
      adb5c247
    • J
      audit: allow audit code to satisfy getname requests from its names_list · 7ac86265
      由 Jeff Layton 提交于 
      Currently, if we call getname() on a userland string more than once,
we'll get multiple copies of the string and multiple audit_names
records.

Add a function that will allow the audit_names code to satisfy getname
requests using info from the audit_names list, avoiding a new allocation
and audit_names records.
Signed-off-by: NJeff Layton <jlayton@redhat.com>
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
      7ac86265
    • J
      vfs: define struct filename and have getname() return it · 91a27b2a
      由 Jeff Layton 提交于 
      getname() is intended to copy pathname strings from userspace into a
kernel buffer. The result is just a string in kernel space. It would
however be quite helpful to be able to attach some ancillary info to
the string.

For instance, we could attach some audit-related info to reduce the
amount of audit-related processing needed. When auditing is enabled,
we could also call getname() on the string more than once and not
need to recopy it from userspace.

This patchset converts the getname()/putname() interfaces to return
a struct instead of a string. For now, the struct just tracks the
string in kernel space and the original userland pointer for it.

Later, we'll add other information to the struct as it becomes
convenient.
Signed-off-by: NJeff Layton <jlayton@redhat.com>
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
      91a27b2a