lkml.org 
[lkml]   [2019]   [Feb]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Subject[PATCH v3 0/4] arm64: kprobes: Update blacklist checking on arm64
Date
Hello,

Here is the v3 series of update of the kprobe blacklist
checking on arm64.

I found that some blacklist checking code were mis-placed in
arch_prepare_kprobe() and arch_within_kprobe_blacklist().
Since the blacklist just filters by symbol, smaller than the
symbol, like extable must be checked in arch_prepare_kprobe().
Also, all function (symbol) level check must be done by blacklist.

For arm64, it checks the extable entry address in blacklist
and exception/irqentry function in arch_prepare_kprobe().
And, RODATA check is unneeded since kernel/kprobes.c
already ensures the probe address is in kernel-text area.

In v3, I rebased on the latest arm64 kernel which includes
James' KVM/HYP fixes for kprobes, and fix a reported bugs
in [4/4].

Changes in v3:
- [4/4] Fixes to remove redundant blacklist of kprobe_text
and add blacklist on exception_text.

Thank you,

---

Masami Hiramatsu (4):
arm64: kprobes: Move extable address check into arch_prepare_kprobe()
arm64: kprobes: Remove unneeded RODATA check
arm64: kprobes: Move exception_text check in blacklist
arm64: kprobes: Use arch_populate_kprobe_blacklist()


arch/arm64/kernel/probes/kprobes.c | 52 +++++++++++++++++++-----------------
1 file changed, 27 insertions(+), 25 deletions(-)

--
Masami Hiramatsu (Linaro) <mhiramat@kernel.org>

\
 
 \ /
  Last update: 2019-02-12 16:44    [W:0.063 / U:2.468 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site