Bug#960702: ethtool -m values change when output is redirected

From	Ben Hutchings <ben@decadent.org.uk>
Newsgroups	linux.debian.bugs.dist, linux.debian.kernel
Subject	Bug#960702: ethtool -m values change when output is redirected
Date	2020-05-17 18:10 +0200
Message-ID	<A7u1r-7I4-5@gated-at.bofh.it> (permalink)
References	<A6S5P-lw-1@gated-at.bofh.it> <A6KrD-4d1-3@gated-at.bofh.it> <A7sVH-6PJ-1@gated-at.bofh.it> <A6KrD-4d1-3@gated-at.bofh.it> <A7sVH-6PJ-1@gated-at.bofh.it>
Organization	linux.* mail to news gateway

Cross-posted to 2 groups.

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Control: tag -1 - moreinfo
Control: reassign -1 src:linux
Control: found -1 4.9.210-1
Control: found -1 4.19.118-2
Control: found -1 5.6.7-1
Control: tag -1 security

On Sun, 2020-05-17 at 14:41 +0000, Yannis Aribaud wrote:
> 16 mai 2020 01:29 "Ben Hutchings" <ben@decadent.org.uk> a écrit:
> 
> > Control: tag -1 moreinfo
> > 
> > [...]
> > 
> > > I am using Debian GNU/Linux 10 (buster), kernel 4.19.0-9-amd64 #1 SMP
> > > Debian 4.19.118-2 (2020-04-29) x86_64 GNU/Linux and libc6 2.28-10
> > 
> > And which network driver are you using?
> 
> root@localhost:~# ethtool -i enp10s0
> driver: mlx4_en
> version: 4.0-0
> firmware-version: 2.42.5000
> expansion-rom-version: 
> bus-info: 0000:0a:00.0
> supports-statistics: yes
> supports-test: yes
> supports-eeprom-access: no
> supports-register-dump: no
> supports-priv-flags: yes
> 
> root@localhost:~# modinfo mlx4_en 
> filename:       /lib/modules/4.19.0-9-amd64/kernel/drivers/net/ethernet/mellanox/mlx4/mlx4_en.ko
[...]

Right, this turns to have exactly the bug I suspected. :-/

Tagged security because this is leaking kernel memory.

Ben.

-- 
Ben Hutchings
Logic doesn't apply to the real world. - Marvin Minsky

Thread

Bug#960702: ethtool -m values change when output is redirected "Yannis Aribaud" <bugs@d6bell.net> - 2020-05-15 17:30 +0200
  Bug#960702: ethtool -m values change when output is redirected Bjørn Mork <bjorn@mork.no> - 2020-05-15 19:00 +0200
    Bug#960702: ethtool -m values change when output is redirected "Yannis Aribaud" <bugs@d6bell.net> - 2020-05-15 19:40 +0200
  Bug#960702: ethtool -m values change when output is redirected Ben Hutchings <ben@decadent.org.uk> - 2020-05-16 01:40 +0200
    Bug#960702: ethtool -m values change when output is redirected "Yannis Aribaud" <bugs@d6bell.net> - 2020-05-17 17:00 +0200
      Bug#960702: ethtool -m values change when output is redirected Ben Hutchings <ben@decadent.org.uk> - 2020-05-17 18:10 +0200
        Bug#960702: ethtool -m values change when output is redirected "Yannis Aribaud" <bugs@d6bell.net> - 2020-05-18 12:10 +0200
  Processed: Re: Bug#960702: ethtool -m values change when output  is redirected "Debian Bug Tracking System" <owner@bugs.debian.org> - 2020-05-16 01:40 +0200
  Processed: Re: Bug#960702: ethtool -m values change when output  is redirected "Debian Bug Tracking System" <owner@bugs.debian.org> - 2020-05-17 18:10 +0200
  Bug#960702: [PATCH net] mlx4: Fix information leak on failure to read module EEPROM Ben Hutchings <ben@decadent.org.uk> - 2020-05-17 19:30 +0200
  Bug#960702: [PATCH net] mlx4: Fix information leak on failure to read module EEPROM Ben Hutchings <ben@decadent.org.uk> - 2020-05-18 20:30 +0200

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