perf-lock(1)
============

NAME
----
perf-lock - Analyze lock events

SYNOPSIS
--------
[verse]
'perf lock' {record|report|script|info}

DESCRIPTION
-----------
You can analyze various lock behaviours
and statistics with this 'perf lock' command.

  'perf lock record <command>' records lock events
  between start and end <command>. And this command
  produces the file "perf.data" which contains tracing
  results of lock events.

  'perf lock report' reports statistical data.

  'perf lock script' shows raw lock events.

  'perf lock info' shows metadata like threads or addresses
  of lock instances.

COMMON OPTIONS
--------------

-i::
--input=<file>::
        Input file name. (default: perf.data unless stdin is a fifo)

-v::
--verbose::
        Be more verbose (show symbol address, etc).

-D::
--dump-raw-trace::
        Dump raw trace in ASCII.

REPORT OPTIONS
--------------

-k::
--key=<value>::
        Sorting key. Possible values: acquired (default), contended,
	avg_wait, wait_total, wait_max, wait_min.

INFO OPTIONS
------------

-t::
--threads::
	dump thread list in perf.data

-m::
--map::
	dump map of lock instances (address:name table)

SEE ALSO
--------
linkperf:perf[1]
option value='packet-loop-back'>packet-loop-back</option>
<option value='packet-rx-pump-back'>packet-rx-pump-back</option>
</select> <input type='submit' value='switch'/></form></td></tr>
<tr><td class='sub'>net-next plumbings</td><td class='sub right'>Tobias Klauser</td></tr></table>
<table class='tabs'><tr><td>
<a href='/cgit.cgi/linux/net-next.git/'>summary</a><a href='/cgit.cgi/linux/net-next.git/refs/?id=61aad724ec0a685bc83b02b059a3ca0ad3bde6b0'>refs</a><a class='active' href='/cgit.cgi/linux/net-next.git/log/net/ipv4/igmp.c?showmsg=1'>log</a><a href='/cgit.cgi/linux/net-next.git/tree/net/ipv4/igmp.c?id=61aad724ec0a685bc83b02b059a3ca0ad3bde6b0'>tree</a><a href='/cgit.cgi/linux/net-next.git/commit/net/ipv4/igmp.c?id=61aad724ec0a685bc83b02b059a3ca0ad3bde6b0'>commit</a><a href='/cgit.cgi/linux/net-next.git/diff/net/ipv4/igmp.c?id=61aad724ec0a685bc83b02b059a3ca0ad3bde6b0'>diff</a></td><td class='form'><form class='right' method='get' action='/cgit.cgi/linux/net-next.git/log/net/ipv4/igmp.c'>
<input type='hidden' name='id' value='61aad724ec0a685bc83b02b059a3ca0ad3bde6b0'/><input type='hidden' name='showmsg' value='1'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/log/?id=61aad724ec0a685bc83b02b059a3ca0ad3bde6b0&amp;showmsg=1'>root</a>/<a href='/cgit.cgi/linux/net-next.git/log/net?id=61aad724ec0a685bc83b02b059a3ca0ad3bde6b0&amp;showmsg=1'>net</a>/<a href='/cgit.cgi/linux/net-next.git/log/net/ipv4?id=61aad724ec0a685bc83b02b059a3ca0ad3bde6b0&amp;showmsg=1'>ipv4</a>/<a href='/cgit.cgi/linux/net-next.git/log/net/ipv4/igmp.c?id=61aad724ec0a685bc83b02b059a3ca0ad3bde6b0&amp;showmsg=1'>igmp.c</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/cgit.cgi/linux/net-next.git/log/net/ipv4/igmp.c?id=61aad724ec0a685bc83b02b059a3ca0ad3bde6b0'>Collapse</a>)</th><th class='left'>Author</th><th class='left'>Files</th><th class='left'>Lines</th></tr>
<tr class='logheader'><td><span title='2017-02-09 16:43:45 -0500'>2017-02-09</span></td><td class='logsubject'><a href='/cgit.cgi/linux/net-next.git/commit/net/ipv4/igmp.c?id=9c8bb163ae784be4f79ae504e78c862806087c54'>igmp, mld: Fix memory leak in igmpv3/mld_del_delrec()</a></td><td>Hangbin Liu</td><td>1</td><td><span class='deletions'>-0</span>/<span class='insertions'>+1</span></td></tr>
<tr class='nohover-highlight'><td/><td colspan='5' class='logmsg'>
In function igmpv3/mld_add_delrec() we allocate pmc and put it in
idev-&gt;mc_tomb, so we should free it when we don't need it in del_delrec().
But I removed kfree(pmc) incorrectly in latest two patches. Now fix it.

Fixes: 24803f38a5c0 ("igmp: do not remove igmp souce list info when ...")
Fixes: 1666d49e1d41 ("mld: do not remove mld souce list info when ...")
Reported-by: Daniel Borkmann &lt;daniel@iogearbox.net&gt;
Signed-off-by: Hangbin Liu &lt;liuhangbin@gmail.com&gt;
Signed-off-by: David S. Miller &lt;davem@davemloft.net&gt;


</td></tr>