From: Andy Lutomirski <luto@kernel.org>
To: Eiichi Tsukata <devel@etsukata.com>
Cc: Vegard Nossum <vegard.nossum@oracle.com>,
Peter Zijlstra <peterz@infradead.org>,
Thomas Gleixner <tglx@linutronix.de>,
Borislav Petkov <bp@alien8.de>, Ingo Molnar <mingo@kernel.org>,
Steven Rostedt <rostedt@goodmis.org>,
Andrew Lutomirski <luto@kernel.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
linux_lkml_grp@oracle.com, "H. Peter Anvin" <hpa@zytor.com>,
Dave Hansen <dave.hansen@linux.intel.com>,
Juergen Gross <jgross@suse.com>,
LKML <linux-kernel@vger.kernel.org>,
He Zhe <zhe.he@windriver.com>,
Joel Fernandes <joel@joelfernandes.org>
Subject: Re: [PATCH v3 0/6] Tracing vs CR2
Date: Thu, 18 Jul 2019 13:27:23 -0700 [thread overview]
Message-ID: <CALCETrVH_F-OVQOsJ=KRGtNLQfM5QpSzP4UNn2RbLjP4ueeq-g@mail.gmail.com> (raw)
In-Reply-To: <d82854b2-d2a4-5b83-b4a4-796db0fd401b@etsukata.com>
Hi all-
I suspect that a bunch of the bugs you're all finding boil down to:
- Nested debug exceptions could corrupt the outer exception's DR6.
- Nested debug exceptions in which *both* exceptions came from the
kernel were probably all kinds of buggy
- Data breakpoints in bad places in the kernel were bad news
Could you give this not-quite-finished series a try?
https://git.kernel.org/pub/scm/linux/kernel/git/luto/linux.git/
next prev parent reply other threads:[~2019-07-18 20:27 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-11 11:40 [PATCH v3 0/6] Tracing vs CR2 Peter Zijlstra
2019-07-11 11:40 ` [PATCH v3 1/6] x86/paravirt: Make read_cr2() CALLEE_SAVE Peter Zijlstra
2019-07-17 21:22 ` [tip:x86/urgent] " tip-bot for Peter Zijlstra
2019-07-11 11:40 ` [PATCH v3 2/6] x86/entry/32: Simplify common_exception Peter Zijlstra
2019-07-17 21:23 ` [tip:x86/urgent] " tip-bot for Peter Zijlstra
2019-07-11 11:40 ` [PATCH v3 3/6] x86/entry/64: Simplify idtentry a little Peter Zijlstra
2019-07-17 21:24 ` [tip:x86/urgent] " tip-bot for Peter Zijlstra
2019-07-11 11:40 ` [PATCH v3 4/6] x86/entry/64: Update comments and sanity tests for create_gap Peter Zijlstra
2019-07-17 21:25 ` [tip:x86/urgent] " tip-bot for Peter Zijlstra
2019-07-11 11:40 ` [PATCH v3 5/6] x86/mm, tracing: Fix CR2 corruption Peter Zijlstra
2019-07-17 21:25 ` [tip:x86/urgent] " tip-bot for Peter Zijlstra
2019-07-11 11:41 ` [PATCH v3 6/6] x86/entry/64: Remove TRACE_IRQS_*_DEBUG Peter Zijlstra
2019-07-11 14:45 ` Andy Lutomirski
2019-07-11 18:28 ` Peter Zijlstra
2019-07-16 19:33 ` [PATCH v3 0/6] Tracing vs CR2 Vegard Nossum
2019-07-16 21:51 ` Vegard Nossum
2019-07-17 1:02 ` Andy Lutomirski
2019-07-17 7:46 ` Vegard Nossum
2019-07-17 7:47 ` Peter Zijlstra
2019-07-17 9:37 ` Eiichi Tsukata
2019-07-18 20:27 ` Andy Lutomirski [this message]
2019-07-20 3:59 ` Eiichi Tsukata
2019-07-20 12:49 ` Andy Lutomirski
2019-07-20 14:23 ` Eiichi Tsukata
2019-07-17 8:07 ` Peter Zijlstra
2019-07-17 8:09 ` Vegard Nossum
2019-07-18 8:57 ` [PATCH] stacktrace: Force USER_DS for stack_trace_save_user() Peter Zijlstra
2019-07-18 13:21 ` Joel Fernandes
2019-07-18 14:52 ` [tip:core/urgent] " tip-bot for Peter Zijlstra
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