On 6/22/19 5:32 PM, Todd Mortimer wrote:
> On Sat, Jun 22, 2019 at 12:25:30PM +0200, Stephane HUC "PengouinBSD" wrote:
> >> (...) >> >> Perhaps, for Firefox, it's a problem with pledge? >> >>
I see thoses messages in /var/log/messages - egual on 'dmesg': >> >> Jun
22 11:21:21 ptb-z /bsd: firefox[19999]: pledge "flock", syscall 92 >>
Jun 22 11:21:21 ptb-z /bsd: firefox[17962]: pledge "flock", syscall 92
>> Jun 22 11:21:22 ptb-z /bsd: firefox[47501]: pledge "flock", syscall
92 >> >> (...) >> >> firefox[68021]: pledge "flock", syscall 92 >>
firefox[22469]: pledge "flock", syscall 92 >> firefox[41244]: pledge
"flock", syscall 92 >> >> ??? > > This happens sometimes when firefox is
calling into some library that > hits these syscalls, and those syscalls
are not in the firefox pledge. > In my experience this is often some
uncommon code path through X, > usually related to which graphics driver
you are using, but it could be > anything. When I have this happen to
me, it is always on specific > websites that trigger some rendering
codepath through X that uses some > unusual way to allocate memory or
something. In your case, it could also > be some extension you have
loaded. > > You can pretty easily see what is going wrong: > > When a
firefox tab crashes you should have a firefox.core file lying > around
(usually in your $HOME, but it will be wherever you launched > firefox
from). Run gdb on /usr/local/bin/firefox, and then load up the > core
file. It will drop you into the spot where firefox was killed, and > you
can check the backtrace to see what code path took you to the system >
call that hasn't been pledged. > > In this instance, firefox is calling
fcntl, which is covered by the > "flock" pledge. You can add "flock" to
the > security.sandbox.pledge.content line in about:config and see if
that > makes it work for you. If you have at all modified the firefox
content > or main pledges from their defaults, you should check to see
if > reverting to their defaults helps ("flock" is in the main pledge by
> default, but not in the content pledge). > > Hope this helps.
Hi,
Now, Firefox tab crash; as you wrote, I try gdb:
$ gdb /usr/local/bin/firefox
GNU gdb 6.3
Copyright 2004 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain
conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB. Type "show warranty" for details.
This GDB was configured as "amd64-unknown-openbsd6.5"...(no debugging
symbols found)
(gdb) core-file firefox.core
warning: Couldn't find general-purpose registers in core file.
warning: Couldn't find general-purpose registers in core file.
#0 0x0000000000000000 in ?? ()
(gdb) backtrace
#0 0x0000000000000000 in ?? ()
Cannot access memory at address 0x0
(gdb) q
What do you want another?
--
~ " Fully Basic System Distinguish Life! " ~ " Libre as a BSD " +=<<<
----
<me>Stephane HUC as PengouinBSD or CIOTBSD</me>
<mail>b...@stephane-huc.net</mail>
