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Bug#908570: marked as done (linux 4.18: dmesg readable as normal user)



Your message dated Tue, 11 Sep 2018 14:55:50 +0200
with message-id <d096b3351988f29d482bcd9c0bd4ef1c@debian.org>
and subject line Re: Bug#908570: linux 4.18: dmesg readable as normal user
has caused the Debian Bug report #908570,
regarding linux 4.18: dmesg readable as normal user
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

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-- 
908570: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=908570
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems
--- Begin Message ---
Source: linux
Version: 4.18.6-1

Unfortunately I have experienced this on a rebuilt package and cannot easily test with the one actually in Debian unstable, but for me dmesg seems to work as a normal user again. "cat /dev/kmsg" just works:

[...]
open("/dev/kmsg", O_RDONLY|O_NONBLOCK)  = 3
lseek(3, 0, SEEK_DATA)                  = 0
read(3, "5,0,0,-;Linux version 4.18.0-1ro"..., 8191) = 157
[...]

% grep DMESG /boot/config-4.18.0-1rodete1-amd64
CONFIG_SECURITY_DMESG_RESTRICT=y

(We do very, very minimal patching to the kernel to make it work for us, hence the different ABI version. And it'd really help us if the ABI version were to be bumped with every upload.)

Kind regards and thanks
Philipp Kern

--- End Message ---
--- Begin Message ---
On 2018-09-11 13:03, Yves-Alexis Perez wrote:
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

On Tue, 2018-09-11 at 12:01 +0200, Philipp Kern wrote:
Source: linux
Version: 4.18.6-1

Unfortunately I have experienced this on a rebuilt package and cannot
easily test with the one actually in Debian unstable, but for me dmesg
seems to work as a normal user again. "cat /dev/kmsg" just works:

[...]
open("/dev/kmsg", O_RDONLY|O_NONBLOCK)  = 3
lseek(3, 0, SEEK_DATA)                  = 0
read(3, "5,0,0,-;Linux version 4.18.0-1ro"..., 8191) = 157
[...]

% grep DMESG /boot/config-4.18.0-1rodete1-amd64
CONFIG_SECURITY_DMESG_RESTRICT=y

(We do very, very minimal patching to the kernel to make it work for us,
hence the different ABI version. And it'd really help us if the ABI
version were to be bumped with every upload.)
what's the content of kernel.dmesg_restrict sysctl?

Thanks Yves, for pointing out the obvious. Looks like I got confused between machines and we indeed set that to 0. Sorry for the noise and thanks a lot for the help.

Kind regards
Philipp Kern

--- End Message ---

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