linux-kernel - Re: 2.6.25-rc7-git5: Reported regressions from 2.6.24

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 for Android: free password hash cracker in your pocket

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

Message-ID: <47F123DF.10204@rtr.ca>
Date:	Mon, 31 Mar 2008 13:48:15 -0400
From:	Mark Lord <lkml@....ca>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	LKML <linux-kernel@...r.kernel.org>, Adrian Bunk <bunk@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Natalie Protasevich <protasnb@...il.com>
Subject: Re: 2.6.25-rc7-git5: Reported regressions from 2.6.24

Rafael,

Add this one to the list?

* * * * *

Subject: + driver-core-fix-uevent-action-string-regression.patch added to -mm tree
From: akpm
To: mm-commits
Date: 28/03/08 07:51 PM

The patch titled
     driver core: fix uevent action-string regression
has been added to the -mm tree.  Its filename is
     driver-core-fix-uevent-action-string-regression.patch
...

The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/

------------------------------------------------------
Subject: driver core: fix uevent action-string regression
From: Mark Lord <lkml@....ca>

On boot, syslog is flooded with "uevent: unsupported action-string;" messages.
..
Mar 28 14:43:29 shrimp kernel: tty ptyqd: uevent: unsupported
action-string; this will be ignored in a future kernel version
Mar 28 14:43:29 shrimp kernel: tty ptyqe: uevent: unsupported
action-string; this will be ignored in a future kernel version
Mar 28 14:43:29 shrimp kernel: tty ptyqf: uevent: unsupported
action-string; this will be ignored in a future kernel version
Mar 28 14:43:29 shrimp kernel: tty ptyr0: uevent: unsupported
action-string; this will be ignored in a future kernel version

These messages are a regression compared with 2.6.24, which did not flood the
syslog with them.

The actual underlying problem was introduced in 2.6.23, when somebody made the
string parsing no longer accept nul-terminated strings as a valid input to
store_uevent().

Eg.  "add\0" was valid prior to 2.6.23, where the code regressed to require
"add" without the '\0'.

This patch fixes the 2.6.23 / 2.6.24 regressions, by having the code once
again tolerate the trailing '\0', if present.

According to GregKH, this mainly affects older Ubuntu systems, such as the one
I have here that requires this fix.

Signed-off-by: Mark Lord <mlord@...ox.com>
Cc: Greg KH <greg@...ah.com>
Cc: Kay Sievers <kay.sievers@...y.org>
Cc: <stable@...nel.org>
Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
---

 lib/kobject_uevent.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff -puN lib/kobject_uevent.c~driver-core-fix-uevent-action-string-regression lib/kobject_uevent.c
--- a/lib/kobject_uevent.c~driver-core-fix-uevent-action-string-regression
+++ a/lib/kobject_uevent.c
@@ -59,7 +59,7 @@ int kobject_action_type(const char *buf,
 	enum kobject_action action;
 	int ret = -EINVAL;

-	if (count && buf[count-1] == '\n')
+	if (count && (buf[count-1] == '\n' || buf[count-1] == '\0'))
 		count--;

 	if (!count)
_

Patches currently in -mm which might be from lkml@....ca are

driver-core-fix-uevent-action-string-regression.patch
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/