The patch titled
     Clone flag CLONE_PARENT_TIDPTR leaves invalid results in memory
has been removed from the -mm tree.  Its filename was
     clone-flag-clone_parent_tidptr-leaves-invalid-results-in-memory.patch

This patch was dropped because it is obsolete

------------------------------------------------------
Subject: Clone flag CLONE_PARENT_TIDPTR leaves invalid results in memory
From: Daniel Jacobowitz <[EMAIL PROTECTED]>

Fix http://bugzilla.kernel.org/show_bug.cgi?id=7210

Do not implement CLONE_PARENT_SETTID until we know that clone will succeed. 
If we do it too early NPTL's data structures temporarily reference a
non-existant TID.

Signed-off-by: Daniel Jacobowitz <[EMAIL PROTECTED]>
Cc: "Eric W. Biederman" <[EMAIL PROTECTED]>
Acked-by: Roland McGrath <[EMAIL PROTECTED]>
Cc: Oleg Nesterov <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
---

 kernel/fork.c |   14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff -puN 
kernel/fork.c~clone-flag-clone_parent_tidptr-leaves-invalid-results-in-memory 
kernel/fork.c
--- 
a/kernel/fork.c~clone-flag-clone_parent_tidptr-leaves-invalid-results-in-memory
+++ a/kernel/fork.c
@@ -1041,11 +1041,6 @@ static struct task_struct *copy_process(
        delayacct_tsk_init(p);  /* Must remain after dup_task_struct() */
        copy_flags(clone_flags, p);
        p->pid = pid_nr(pid);
-       retval = -EFAULT;
-       if (clone_flags & CLONE_PARENT_SETTID)
-               if (put_user(p->pid, parent_tidptr))
-                       goto bad_fork_cleanup_delays_binfmt;
-
        INIT_LIST_HEAD(&p->children);
        INIT_LIST_HEAD(&p->sibling);
        p->vfork_done = NULL;
@@ -1286,6 +1281,14 @@ static struct task_struct *copy_process(
        total_forks++;
        spin_unlock(&current->sighand->siglock);
        write_unlock_irq(&tasklist_lock);
+
+       /*
+        * Now that we know the fork has succeeded, record the new
+        * TID.  It's too late to back out if this fails.
+        */
+       if (clone_flags & CLONE_PARENT_SETTID)
+               put_user(p->pid, parent_tidptr);
+
        proc_fork_connector(p);
        return p;
 
@@ -1316,7 +1319,6 @@ bad_fork_cleanup_policy:
 bad_fork_cleanup_cpuset:
 #endif
        cpuset_exit(p);
-bad_fork_cleanup_delays_binfmt:
        delayacct_tsk_free(p);
        if (p->binfmt)
                module_put(p->binfmt->module);
_

Patches currently in -mm which might be from [EMAIL PROTECTED] are

clone-flag-clone_parent_tidptr-leaves-invalid-results-in-memory.patch

-
To unsubscribe from this list: send the line "unsubscribe mm-commits" in
the body of a message to [EMAIL PROTECTED]
More majordomo info at  http://vger.kernel.org/majordomo-info.html

Reply via email to