linux-kernel - Re: s390 && user_enable_single_step() (Was: odd utrace testing results on s390x)

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Thu,  7 Jan 2010 13:46:42 -0800 (PST)
From:	Roland McGrath <roland@...hat.com>
To:	Martin Schwidefsky <schwidefsky@...ibm.com>
Cc:	Oleg Nesterov <oleg@...hat.com>, caiqian@...hat.com,
	Heiko Carstens <heiko.carstens@...ibm.com>,
	Jan Kratochvil <jkratoch@...hat.com>,
	linux-kernel@...r.kernel.org, linux-s390@...r.kernel.org,
	utrace-devel@...hat.com
Subject: Re: s390 && user_enable_single_step() (Was: odd utrace testing
 results on s390x)

> Clear the TIF_SINGLE_STEP bit in copy_thread. If the new process is
> not auto-attached by the tracer it is wrong to delivere SIGTRAP to
> the new process.

The change is right, but this log entry is confusing.  "auto-attached" has
nothing to do with it, nor does anything about tracing the new process or
not.  The new process has not experienced a PER trap of its own, so it is
wrong to deliver a SIGTRAP that is meant for its creator.


Thanks,
Roland
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/