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Commit [df0916] Maximize Restore History

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>

Chris Wright Chris Wright 2010-09-09

Steven Rostedt Steven Rostedt 2010-09-10

changed kernel
changed kernel/trace
changed kernel/trace/ftrace.c
kernel/trace/ftrace.c Diff Switch to side-by-side view