From: Chuck Ebbert <[email protected]>
Date: Thu, 25 Oct 2007 14:44:52 -0400
> On 10/25/2007 10:11 AM, Rich Paul wrote:
> > In 2.6.23, there seems to be a minor bug in sys_socketpair. When the
> > calls to sock_alloc_fd fail, it aborts the routine, but it returns the
> > variable err, which is not set in this case.
> >
> > The result is a silent failure if you have too many files open and call
> > socketpair.
> >
> > Here is a simple UNTESTED patch (not even compiled) which should resolve the
> > issue.
> >
> >
> > --- net/socket.c.orig 2007-10-25 10:03:56.000000000 -0400
> > +++ net/socket.c 2007-10-25 10:04:00.000000000 -0400
> Should be "err = fd1" (spaces), otherwise looks good.
>
> Original did:
>
> err = sock_map_fd(sock1);
> if (err < 0)
> goto out_release_both;
> fd1 = err;
Thanks everyone, I'll commit the following both to 2.6.x GIT
and -stable.
>From 42f3fc7e989554e9952bdf28af137e4e4570f067 Mon Sep 17 00:00:00 2001
From: David S. Miller <[email protected]>
Date: Mon, 29 Oct 2007 21:54:02 -0700
Subject: [PATCH] [NET]: Fix error reporting in sys_socketpair().
If either of the two sock_alloc_fd() calls fail, we
forget to update 'err' and thus we'll erroneously
return zero in these cases.
Based upon a report and patch from Rich Paul, and
commentary from Chuck Ebbert.
Signed-off-by: David S. Miller <[email protected]>
---
net/socket.c | 5 ++++-
1 files changed, 4 insertions(+), 1 deletions(-)
diff --git a/net/socket.c b/net/socket.c
index 540013e..5d879fd 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -1250,11 +1250,14 @@ asmlinkage long sys_socketpair(int family, int type, int protocol,
goto out_release_both;
fd1 = sock_alloc_fd(&newfile1);
- if (unlikely(fd1 < 0))
+ if (unlikely(fd1 < 0)) {
+ err = fd1;
goto out_release_both;
+ }
fd2 = sock_alloc_fd(&newfile2);
if (unlikely(fd2 < 0)) {
+ err = fd2;
put_filp(newfile1);
put_unused_fd(fd1);
goto out_release_both;
--
1.5.2.5
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