netdev - [PATCH 0/3] wext: fix an ancient bug

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-next>] [day] [month] [year] [list]

Message-Id: <20170614115523.16379-1-johannes@sipsolutions.net>
Date:   Wed, 14 Jun 2017 13:55:20 +0200
From:   Johannes Berg <johannes@...solutions.net>
To:     linux-wireless@...r.kernel.org, netdev@...r.kernel.org
Cc:     Robert O'Callahan <robert@...llahan.org>
Subject: [PATCH 0/3] wext: fix an ancient bug

Robert O'Callahan reported that since struct iwreq is smaller than
struct ifreq, if it happens to land at the end of a mapped section
userspace will erroneously get -EFAULT.

Bug report is https://bugzilla.kernel.org/show_bug.cgi?id=195869.

This bug is ancient, it kernel 2.1.15 was the first to contain the
bug, and was released almost exactly 20.5 years ago.

Dave, I don't know if we should even bother sending this to stable,
but if so, the third patch will apply by itself but not compile, a
smaller patch consist of only the net/core/dev_ioctl.c modifications
with a cast thrown in where the compile fails/warns due to passing
the wrong struct type.

Should I merge this through my tree?

johannes