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GFS2: Skip check for mandatory locks when unlocking

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gfs2_lock() will skip locks on file which have mode set to 02666. This is a problem in cases where the mode of the file is changed after a process has obtained a lock on the file. Such a lock will be skipped and will result in a BUG in locks_remove_flock().

gfs2_lock() should skip the check for mandatory locks when unlocking a file.

Signed-off-by: Sachin Prabhu <sprabhu@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
This commit is contained in:
Sachin Prabhu 2010-03-11 12:24:45 -05:00 committed by Steven Whitehouse
parent 2e95e3f668
commit 720e774927
1 changed files with 1 additions and 1 deletions
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fs/gfs2/file.c
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@ -640,7 +640,7 @@ static int gfs2_lock(struct file *file, int cmd, struct file_lock *fl)
if (!(fl->fl_flags & FL_POSIX)) if (!(fl->fl_flags & FL_POSIX))
return -ENOLCK; return -ENOLCK;
if (__mandatory_lock(&ip->i_inode)) if (__mandatory_lock(&ip->i_inode) && fl->fl_type != F_UNLCK)
return -ENOLCK; return -ENOLCK;
if (cmd == F_CANCELLK) { if (cmd == F_CANCELLK) {