On Wed, Jul 05, 2023 at 02:46:44PM +0800, Li Huafei wrote: > We found an issue with null pointer access due to kprobe debug exception > error handling on 5.10, and I proposed a separate fix patch for 5.10, > see [1]. But as Greg gave advice, we always choose to backport relevant > patches from upstream to fix issues with stable kernels, so I made this > patch set. > > The main one we need to backport is patch 5, which uses int3 instead of > debug trap for single-stepping, thus avoiding the problems we > encountered with kprobe debug exception error handling. Patches 1-4 are > pre-patches, and patches 6-9 are fixes for patch 5. The major > modifications are patch 2 and patch 5. Patch 2 optimizes > resume_execution() to avoid repeated instruction decoding, and patch 5 > uses int3 instead of debug trap, and as Masami said in the commit > message this patch will change some behavior of kprobe, but it has > almost no effect on the actual usage. > > Please let me know if there are any problems, thanks! Looks good, thanks for the backports, all now queued up. greg k-h
