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[v2,0/2] x86: kprobes: Fix CFI_CLANG related issues

Message ID 168904023542.116016.10540228903086100726.stgit@devnote2 (mailing list archive)
Headers show
Series x86: kprobes: Fix CFI_CLANG related issues | expand

Message

Masami Hiramatsu (Google) July 11, 2023, 1:50 a.m. UTC 
Hi,

Here is the 2nd version of the kprobe patches for kernel CFI.
Previous version is here;

https://lore.kernel.org/all/168899125356.80889.17967397360941194229.stgit@devnote2/

In this version "__pfx_" prefix symbols also are prohibited and that check
is done unconditionally [1/2].

- Prohibit probing on __cfi_* and __pfx_* preamble symbols, which have CFI info.
- Prohibit probing on compiler generated movl/addl which is used for
  detecting typeid on x86.

Thank you,

---

Masami Hiramatsu (Google) (2):
      kprobes: Prohibit probing on CFI preamble symbol
      x86/kprobes: Prohibit probing on compiler generated CFI checking code


 arch/x86/kernel/kprobes/core.c |   34 ++++++++++++++++++++++++++++++++++
 kernel/kprobes.c               |   14 +++++++++++++-
 2 files changed, 47 insertions(+), 1 deletion(-)

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