On Mon, Mar 04, 2024 at 04:15:07PM +0100, Jann Horn wrote: > On Mon, Mar 4, 2024 at 3:02 AM Jiangfeng Xiao <[email protected]> > wrote: > > When the last instruction of a noreturn function is a call > > to another function, the return address falls outside > > of the function boundary. This seems to cause kernel > > to interrupt the backtrace.
FWIW, all email from huawei.com continues to get eaten by anti-spam checking. I've reported this a few times -- it'd be really nice if the domain configuration could get fixed. > [...] > > Delete __noreturn from usercopy_abort, > > This sounds like the actual bug is in the backtracing logic? I don't > think removing __noreturn annotations from an individual function is a > good fix, since the same thing can happen with other __noreturn > functions depending on what choices the compiler makes. Yeah, NAK. usercopy_abort() doesn't return. It ends with BUG(). -- Kees Cook
