Bug#1103418: openssh-server irregularly crashing since 10.0p1 upgrade

On Wed, Apr 30, 2025 at 02:08:47PM +0200, Michel Casabona wrote:
>Le 30/04/2025 à 13:42, Colin Watson a écrit :
>>Is that the complete output from valgrind, or did you edit it down? 
>>It's tantalizingly close to being useful, but it really feels like 
>>there should be more of it.  Could I have all of the lines matching 
>>"==4019365=="?
>
>Yes, I pasted a few line to post, sorry. The full log is attached below.

Thanks.  The leak stuff is basically all noise - I think you can drop 
--leak-check=full as it doesn't really help here.  The interesting bit 
is why sshd-session apparently needs more than the default stack.  The 
lack of a stack trace there makes it difficult to work out context, but 
I think it's probably one of the glob() calls in auth2-pubkey.c.  It 
might be innocent and just be an artifact of running under valgrind; or 
it might point to a deeper problem.

Could you drop --leak-check=full from the valgrind call, and instead add 
--main-stacksize=67108864 (i.e. eight times the current value)?  Then 
provoke the bug again and send me the new valgrind output.  Let's see if 
that tells us something different.

Could I also get your /etc/ssh/sshd_config and /etc/ssh/sshd_config.d/* 
files (of course you can edit out anything secret, but if you do then 
please at least keep the structure)?

Thanks,