Gentoo Archives: gentoo-hardened

From: Grant <emailgrant@×××××.com>
To: gentoo-hardened@l.g.o
Subject: Re: [gentoo-hardened] google-chrome crashes unless softmode
Date: Wed, 23 Jan 2013 03:44:54
Message-Id: CAN0CFw0iKUpwiOgW1tWNH3hsH792-e1xP1zvHQB8g=DiE6tYEA@mail.gmail.com
In Reply to: Re: [gentoo-hardened] google-chrome crashes unless softmode by PaX Team
1 >> google-chrome suffers intermittent crashes on x86 unless I enable
2 >> softmode. Is there any other option to keep it running?
3 >
4 > can you get some details on the nature of crashes? any logs perhaps?
5 > if softmode fixes it then it's probably MPROTECT related, did you
6 > already disable it on the binary?
7
8 MPROTECT is actually already disabled:
9
10 # paxctl -v /opt/google/chrome/chrome
11 PaX control v0.7
12 Copyright 2004,2005,2006,2007,2009,2010,2011,2012 PaX Team
13 <pageexec@××××××××.hu>
14 - PaX flags: -----m-x-e-- [/opt/google/chrome/chrome]
15 MPROTECT is disabled
16 RANDEXEC is disabled
17 EMUTRAMP is disabled
18
19 Here's the segfault from dmesg:
20
21 chrome[13338]: segfault at bbadbeef ip 14d81f2b sp 5ec2e1b0 error 6 in
22 chrome[136f4000+4203000]
23 grsec: Segmentation fault occurred at bbadbeef in
24 /opt/google/chrome/chrome[chrome:13338] uid/euid:1009/1009
25 gid/egid:1009/1009, parent /opt/google/chrome/chrome[chrome:12981]
26 uid/euid:1009/1009 gid/egid:1009/1009
27
28 - Grant

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Re: [gentoo-hardened] google-chrome crashes unless softmode PaX Team <pageexec@××××××××.hu>