• Robert Peterson's avatar
    [GFS2] Red Hat bz 228540: owner references · 04b933f2
    Robert Peterson authored
    In Testing the previously posted and accepted patch for
    I uncovered some gfs2 badness.  It turns out that the current
    gfs2 code saves off a process pointer when glocks is taken
    in both the glock and glock holder structures.  Those
    structures will persist in memory long after the process has
    ended; pointers to poisoned memory.
    This problem isn't caused by the 228540 fix; the new capability
    introduced by the fix just uncovered the problem.
    I wrote this patch that avoids saving process pointers
    and instead saves off the process pid.  Rather than
    referencing the bad pointers, it now does process lookups.
    There is special code that makes the output nicer for
    printing holder information for processes that have ended.
    This patch also adds a stub for the new "sprint_symbol"
    function that exists in Andrew Morton's -mm patch set, but
    won't go into the base kernel until 2.6.22, since it adds
    functionality but doesn't fix a bug.
    Signed-off-by: default avatarBob Peterson <rpeterso@redhat.com>
    Signed-off-by: default avatarSteven Whitehouse <swhiteho@redhat.com>
glock.c 48.1 KB