Bug 453990

Description of problem:
A bug in inotify_user.c

Following comment is at fs/inotify_user.c:287
/* coalescing: drop this event if it is a dupe of the previous */

I think the previous event in the comment should be the last event in the
link list.  But inotify_dev_get_event return the first event in the list.
In addition, it doesn't check whether the list is empty

http://kerneltrap.org/mailarchive/git-commits-head/2008/2/6/748474

Version-Release number of selected component (if applicable):
2.6.18-92.el5

How reproducible:
 Always

Steps to Reproduce:
1. Boot 5.2 GA
2. Install Latest version of LTP and run the inotify02 testcase from the
syscalls tests.
  
Actual results:
------ Log Snippet: -------

<<<test_start>>>
tag=inotify02 stime=1215036015
cmdline="inotify02"
contacts=""
analysis=exit
initiation_status="ok"
<<<test_output>>>
inotify02    1  PASS  :  get event: wd=1 mask=40000004 cookie=0 len=0 name=""
inotify02    2  PASS  :  get event: wd=1 mask=100 cookie=0 len=16 name="test_file1"
inotify02    3  PASS  :  get event: wd=1 mask=20 cookie=0 len=16 name="test_file1"
inotify02    4  PASS  :  get event: wd=1 mask=8 cookie=0 len=16 name="test_file1"
inotify02    5  PASS  :  get event: wd=1 mask=40 cookie=173 len=16 name="test_file1"
inotify02    6  PASS  :  get event: wd=1 mask=80 cookie=173 len=16 name="test_file2"
inotify02    7  PASS  :  get event: wd=1 mask=800 cookie=0 len=0 name=""
inotify02    8  PASS  :  get event: wd=1 mask=200 cookie=0 len=16 name="test_file2"
inotify02    9  PASS  :  get event: wd=1 mask=800 cookie=0 len=0 name=""
inotify02   10  FAIL  :  get unnecessary event: wd=1 mask=800 cookie=0 len=0name=""
<<<execution_status>>>
duration=0 termination_type=exited termination_id=1 corefile=no
cutime=0 cstime=1
<<<test_end>>>

Expected results:
 This test shuold pass

Additional info:
 This was also found upstream and reported to LTP list

- http://www.mail-archive.com/ltp-list@lists.sourceforge.net/msg02636.html

- Patch was added to v2.6.25-rc1~775