[Bugs] [Bug 1215161] rpc: Memory corruption because rpcsvc_register_notify interprets opaque mydata argument as xlator pointer

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1215161



--- Comment #1 from Kotresh HR <khiremat at redhat.com> ---
Following core is seen with geo-rep using changelog.

(gdb) 
#0  0x00007f2c79b373a0 in pthread_mutex_lock () from /lib64/libpthread.so.0
#1  0x00007f2c5fdf70d1 in gf_changelog_process (data=0x7f2c6405c520)
    at
/home/jenkins/root/workspace/smoke/xlators/features/changelog/lib/src/gf-changelog-journal-handler.c:592
#2  0x00007f2c79b359d1 in start_thread () from /lib64/libpthread.so.0
#3  0x00007f2c791f78fd in clone () from /lib64/libc.so.6

(gdb) p *((gf_changelog_journal_t *)0x7f2c6405c520)->jnl_proc
$6 = {lock = {__data = {__lock = 0, __count = 0, __owner = 0, __nusers = 0,
__kind = 0, __spins = 0, __list = {__prev = 0x0, __next = 0x0}}, 
    __size = '\000' <repeats 39 times>, __align = 0}, cond = {__data = {__lock
= 0, __futex = 0, __total_seq = 0, __wakeup_seq = 0, __woken_seq = 0, __mutex =
0x0, 
      __nwaiters = 0, __broadcast_seq = 0}, __size = '\000' <repeats 47 times>,
__align = 0}, waiting = _gf_false, processor = 139828389721856, entries = {
    next = 0x7f2c64076b08, prev = 0x7f2c64076b08}}
(gdb)

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