This is the mail archive of the
systemtap@sourceware.org
mailing list for the systemtap project.
[PATCH -tip v4 0/6] kprobes: introduce NOKPROBE_SYMBOL() and fixes crash bugs
- From: Masami Hiramatsu <masami dot hiramatsu dot pt at hitachi dot com>
- To: Ingo Molnar <mingo at kernel dot org>
- Cc: Ananth N Mavinakayanahalli <ananth at in dot ibm dot com>, Sandeepa Prabhu <sandeepa dot prabhu at linaro dot org>, x86 at kernel dot org, lkml <linux-kernel at vger dot kernel dot org>, "Steven Rostedt (Red Hat)" <rostedt at goodmis dot org>, systemtap at sourceware dot org, "David S. Miller" <davem at davemloft dot net>
- Date: Wed, 04 Dec 2013 01:28:41 +0000
- Subject: [PATCH -tip v4 0/6] kprobes: introduce NOKPROBE_SYMBOL() and fixes crash bugs
- Authentication-results: sourceware.org; auth=none
Hi,
Here is the version 4 of NOKPORBE_SYMBOL series.
In this version, I removed the cleanup patches and
add bugfixes I've found, since those bugs will be
critical.
Rest of the cleanup and visible blacklists will be
proposed later in another series.
Oh, just one new thing, I added a new RFC patch which
removes the dependency of notify_die() from kprobes
miss-hit/recovery path. Since the notify_die() involves
locking and lockdep code which invokes a lot of heavy
printk functions etc. This helped me to minimize the
blacklist and provides more stability for kprobes.
Actually, most of int3 handlers are already called
from do_int3 directly, I think this change is acceptable
too.
Here is the updates about NOKPROBE_SYMBOL().
- Now _ASM_NOKPROBE() macro is introduced for assembly
symbols on x86.
- Rename kprobe_blackpoint to kprobe_blacklist_entry
and simplify it. Also NOKPROBE_SYMBOL() macro just
saves the address of non-probe-able symbols.
---
Masami Hiramatsu (6):
kprobes: Prohibit probing on .entry.text code
kprobes: Introduce NOKPROBE_SYMBOL() macro for blacklist
[BUGFIX] kprobes/x86: Prohibit probing on debug_stack_*
[BUGFIX] x86: Prohibit probing on native_set_debugreg
[BUGFIX] x86: Prohibit probing on thunk functions and restore
[RFC] kprobes/x86: Call exception handlers directly from do_int3/do_debug
Documentation/kprobes.txt | 16 +++++
arch/x86/include/asm/asm.h | 7 ++
arch/x86/include/asm/kprobes.h | 2 +
arch/x86/kernel/cpu/common.c | 4 +
arch/x86/kernel/entry_32.S | 33 -----------
arch/x86/kernel/entry_64.S | 20 -------
arch/x86/kernel/kprobes/core.c | 32 ++++------
arch/x86/kernel/paravirt.c | 5 ++
arch/x86/kernel/traps.c | 10 +++
arch/x86/lib/thunk_32.S | 3 +
arch/x86/lib/thunk_64.S | 3 +
include/asm-generic/vmlinux.lds.h | 9 +++
include/linux/kprobes.h | 21 ++++++-
kernel/kprobes.c | 113 ++++++++++++++++++++-----------------
kernel/sched/core.c | 1
15 files changed, 147 insertions(+), 132 deletions(-)
--
Masami HIRAMATSU
IT Management Research Dept. Linux Technology Center
Hitachi, Ltd., Yokohama Research Laboratory
E-mail: masami.hiramatsu.pt@hitachi.com