| commit | 2a4efa42450762cbfa5c5712aa4cc9f06924c9fd | |
| author | Zhaolei <zhaolei@cn.fujitsu.com> | |
| Wed, 25 Mar 2009 04:06:05 +0000 (25 12:06 +0800) | ||
| committer | Steven Rostedt <srostedt@redhat.com> | |
| Wed, 25 Mar 2009 21:45:36 +0000 (25 17:45 -0400) | ||
| tree | 70af0a079541af99dec634fc89ce317dee2f1a33 | treesnapshot (tar.gz zip) |
| parent | 759ee0915dd713361e72facb78b66600b5712d65 | commitdiff |
ftrace: Using FTRACE_WARN_ON() to check "freed record" in ftrace_release()
"Because when we call ftrace_free_rec we change the rec->ip to point to the
next record in the chain. Something is very wrong if rec->ip >= s &&
rec->ip < e and the record is already free."
"Note, use FTRACE_WARN_ON() macro. This way it shuts down ftrace if it is
hit and helps to avoid further damage later."
-- Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
"Because when we call ftrace_free_rec we change the rec->ip to point to the
next record in the chain. Something is very wrong if rec->ip >= s &&
rec->ip < e and the record is already free."
"Note, use FTRACE_WARN_ON() macro. This way it shuts down ftrace if it is
hit and helps to avoid further damage later."
-- Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
| kernel/trace/ftrace.c | diffblobblamehistory |