From: Cyril Hrubis <chrubis@suse.cz>
To: ltp@lists.linux.it
Cc: Alexandre Chartre <alexandre.chartre@oracle.com>,
Peter Zijlstra <peterz@infradead.org>,
linux-kernel@vger.kernel.org, lkp@lists.01.org,
Andy Lutomirski <luto@kernel.org>,
Thomas Gleixner <tglx@linutronix.de>
Subject: Re: [LTP] [PATCH v2] syscall/ptrace08: Simplify the test.
Date: Fri, 4 Sep 2020 17:53:51 +0200 [thread overview]
Message-ID: <20200904155351.GA13149@yuki.lan> (raw)
In-Reply-To: <20200904140931.10153-1-chrubis@suse.cz>
Hi!
> + /*
> + * The original fix for the kernel haven't rejected the kernel address
> + * right away when breakpoint was modified from userspace it was
> + * disabled and the EINVAL was returned when dr7 was written to enable
> + * it again.
> + */
> + if (tst_kvercmp(4, 17, 0) < 0)
> + deffered_check = 1;
And this should be 4.19 as the modify_user_hw_breakpoint_check() was made
uncoditional (by accident) in:
commit bd14406b78e6daa1ea3c1673bda1ffc9efdeead0
Author: Jiri Olsa <jolsa@kernel.org>
Date: Mon Aug 27 11:12:25 2018 +0200
perf/hw_breakpoint: Modify breakpoint even if the new attr has disabled set
--
Cyril Hrubis
chrubis@suse.cz
prev parent reply other threads:[~2020-09-04 15:53 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-04 14:09 [PATCH v2] syscall/ptrace08: Simplify the test Cyril Hrubis
2020-09-04 15:28 ` [LTP] " Martin Doucha
2020-09-10 15:24 ` Cyril Hrubis
2020-09-04 15:53 ` Cyril Hrubis [this message]
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