The patch titled
fork.c: fix NULL pointer dereference when nr_threads == threads-max
has been removed from the -mm tree. Its filename was
forkc-fix-null-pointer-dereference-when-nr_threads-==-threads-max.patch
This patch was dropped because it was merged into mainline or a subsystem tree
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: fork.c: fix NULL pointer dereference when nr_threads == threads-max
From: Li Zefan <lizf@xxxxxxxxxxxxxx>
I happened to forked lots of processes, and hit NULL pointer dereference.
It is because in copy_process() after checking max_threads, 0 is returned
but not -EAGAIN.
The bug is introduced by this patch:
| commit f1752eec6145c97163dbce62d17cf5d928e28a27
| Author: David Howells <dhowells@xxxxxxxxxx>
| Date: Fri Nov 14 10:39:17 2008 +1100
|
| CRED: Detach the credentials from task_struct
Signed-off-by: Li Zefan <lizf@xxxxxxxxxxxxxx>
Cc: David Howells <dhowells@xxxxxxxxxx>
Cc: James Morris <jmorris@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/fork.c | 1 +
1 file changed, 1 insertion(+)
diff -puN kernel/fork.c~forkc-fix-null-pointer-dereference-when-nr_threads-==-threads-max kernel/fork.c
--- a/kernel/fork.c~forkc-fix-null-pointer-dereference-when-nr_threads-==-threads-max
+++ a/kernel/fork.c
@@ -1010,6 +1010,7 @@ static struct task_struct *copy_process(
* triggers too late. This doesn't hurt, the check is only there
* to stop root fork bombs.
*/
+ retval = -EAGAIN;
if (nr_threads >= max_threads)
goto bad_fork_cleanup_count;
_
Patches currently in -mm which might be from lizf@xxxxxxxxxxxxxx are
linux-next.patch
cgroups-fix-lockdep-subclasses-overflow.patch
relax-ns_can_attach-checks-to-allow-attaching-to-grandchild-cgroups.patch
cgroup-css-id-support.patch
cgroup-fix-frequent-ebusy-at-rmdir.patch
memcg-use-css-id.patch
memcg-hierarchical-stat.patch
memcg-fix-shrinking-memory-to-return-ebusy-by-fixing-retry-algorithm.patch
memcg-fix-oom-killer-under-memcg.patch
memcg-fix-oom-killer-under-memcg-fix2.patch
memcg-fix-oom-killer-under-memcg-fix.patch
memcg-show-memcg-information-during-oom.patch
memcg-show-memcg-information-during-oom-fix2.patch
memcg-show-memcg-information-during-oom-fix.patch
memcg-show-memcg-information-during-oom-fix-fix.patch
memcg-show-memcg-information-during-oom-fix-fix-checkpatch-fixes.patch
cpuset-fix-possible-races-in-cpu-memory-hotplug.patch
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