[PATCH 0/3] arm64: kprobes: Fix bugs in kprobes for arm64
From: Masami Hiramatsu (Google)
Date: Thu Dec 01 2022 - 09:39:04 EST
Hi,
I found some bugs in kprobes for arm64. One is a critical issue, which
will cause a kernel crach easily with lockdep[1/3]. Others are minor
issues and rare cases. [2/3] let do_page_fault() fixup the page fault
in kprobes user handler, and [3/3] is more like code cleanup and
returns DBG_HOOK_ERROR if it can not handle kprobe's BRK (but that
should not happen.)
Thank you,
---
Masami Hiramatsu (Google) (3):
arm64: Prohibit probing on arch_stack_walk()
arm64: kprobes: Let arch do_page_fault() fix up page fault in user handler
arm64: kprobes: Return DBG_HOOK_ERROR if kprobes can not handle a BRK
arch/arm64/kernel/probes/kprobes.c | 87 +++++++++++++++---------------------
arch/arm64/kernel/stacktrace.c | 7 ++-
2 files changed, 41 insertions(+), 53 deletions(-)
--
Masami Hiramatsu (Google) <mhiramat@xxxxxxxxxx>