tree e8ba6014c442cf72d587948733f8c29e0d330925
parent 5e11637e2c929e34dcc0fbbfb48bdb638937701a
author Chris Wright <chrisw@sous-sol.org> 1284075299 -0700
committer Steven Rostedt <rostedt@goodmis.org> 1284086629 -0400

tracing: t_start: reset FTRACE_ITER_HASH in case of seek/pread

Be sure to avoid entering t_show() with FTRACE_ITER_HASH set without
having properly started the iterator to iterate the hash.  This case is
degenerate and, as discovered by Robert Swiecki, can cause t_hash_show()
to misuse a pointer.  This causes a NULL ptr deref with possible security
implications.  Tracked as CVE-2010-3079.

Cc: Robert Swiecki <swiecki@google.com>
Cc: Eugene Teo <eugene@redhat.com>
Cc: <stable@kernel.org>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>