netdev - Re: [PATCH 1/2][INET] (resend) Fix potential kfree on vmalloc-ed area of request_sock

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20071115102101.c1b928b7.dada1@cosmosbay.com>
Date:	Thu, 15 Nov 2007 10:21:01 +0100
From:	Eric Dumazet <dada1@...mosbay.com>
To:	Pavel Emelyanov <xemul@...nvz.org>
Cc:	David Miller <davem@...emloft.net>,
	Linux Netdev List <netdev@...r.kernel.org>, devel@...nvz.org
Subject: Re: [PATCH 1/2][INET] (resend) Fix potential kfree on vmalloc-ed
 area of request_sock_queue

On Thu, 15 Nov 2007 11:41:37 +0300
Pavel Emelyanov <xemul@...nvz.org> wrote:

> The request_sock_queue's listen_opt is either vmalloc-ed or
> kmalloc-ed depending on the number of table entries. Thus it 
> is expected to be handled properly on free, which is done in 
> the reqsk_queue_destroy().
> 
> However the error path in inet_csk_listen_start() calls 
> the lite version of reqsk_queue_destroy, called 
> __reqsk_queue_destroy, which calls the kfree unconditionally. 
> 
> Fix this and move the __reqsk_queue_destroy into a .c file as 
> it looks too big to be inline.
> 
> As David also noticed, this is an error recovery path only,
> so no locking is required and the lopt is known to be not NULL.
> 
> Signed-off-by: Pavel Emelyanov <xemul@...nvz.org>
> 

Acked-by: Eric Dumazet <dada1@...mosbay.com>

Thank you for finding this bug Pavel

-
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html