Re: [PATCH v3 16/16] objtool,x86: Rewrite retpoline thunk calls

[Nick Desaulniers]

(Manually replying to https://lore.kernel.org/lkml/CAFJ_xbq06nfaEWtVNLtg7XCJrQeQ9wCs4Zsoi5Y_HP3Dx0iTRA@xxxxxxxxxxxxxx/)

Hi Peter,
We're also tracking 2 recent regressions that look like they've come from this
patch.

https://github.com/ClangBuiltLinux/linux/issues/1384
https://github.com/ClangBuiltLinux/linux/issues/1388

(Both in linux-next at the moment).

The first, it looks like a boot failure. The second is a warning from the
linker on a kernel module; even readelf seems unhappy with the results of the
output from objtool.

I can more easily reproduce the latter, so I'm working on getting a smaller
reproducer. I'll let you know when I have it, but wanted to report it ASAP.