netdev - Re: [PATCH] sctp: fix -ENOMEM result with invalid user space pointer in sendto() syscall

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] [day] [month] [year] [list]

Message-Id: <20121128.111214.940932171814395302.davem@davemloft.net>
Date:	Wed, 28 Nov 2012 11:12:14 -0500 (EST)
From:	David Miller <davem@...emloft.net>
To:	tt.rantala@...il.com
Cc:	linux-sctp@...r.kernel.org, netdev@...r.kernel.org,
	nhorman@...driver.com, vyasevich@...il.com, sri@...ibm.com,
	davej@...hat.com
Subject: Re: [PATCH] sctp: fix -ENOMEM result with invalid user space
 pointer in sendto() syscall

From: Tommi Rantala <tt.rantala@...il.com>
Date: Thu, 22 Nov 2012 15:23:16 +0200

> Consider the following program, that sets the second argument to the
> sendto() syscall incorrectly:
 ...
> We get -ENOMEM:
> 
>  $ strace -e sendto ./demo
>  sendto(3, NULL, 1, 0, {sa_family=AF_INET, sin_port=htons(11111), sin_addr=inet_addr("127.0.0.1")}, 16) = -1 ENOMEM (Cannot allocate memory)
> 
> Propagate the error code from sctp_user_addto_chunk(), so that we will
> tell user space what actually went wrong:
> 
>  $ strace -e sendto ./demo
>  sendto(3, NULL, 1, 0, {sa_family=AF_INET, sin_port=htons(11111), sin_addr=inet_addr("127.0.0.1")}, 16) = -1 EFAULT (Bad address)
> 
> Noticed while running Trinity (the syscall fuzzer).
> 
> Signed-off-by: Tommi Rantala <tt.rantala@...il.com>

Applied.
--
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