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[0/3] arm64: kprobes: Fix bugs in kprobes for arm64

Message ID 166990553243.253128.13594802750635478633.stgit@devnote3 (mailing list archive)
Headers show
Series arm64: kprobes: Fix bugs in kprobes for arm64 | expand

Message

Masami Hiramatsu (Google) Dec. 1, 2022, 2:38 p.m. UTC 
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@kernel.org>