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(parent: bc12b70) | patch
x86,retpoline: Be sure to emit INT3 after JMP *%\reg
authorPeter Zijlstra <peterz@infradead.org>
Thu, 8 Sep 2022 10:04:50 +0000 (12:04 +0200)
committerPeter Zijlstra <peterz@infradead.org>
Thu, 15 Sep 2022 14:13:53 +0000 (16:13 +0200)
commit8c03af3e090e9d57d90f482d344563dd4bae1e66
tree8d5a69ee1085ce310672ea551f78baa74ea25c66tree | snapshot
parentbc12b70f7d216b36bd87701349374a13e486f8ebcommit | diff
x86,retpoline: Be sure to emit INT3 after JMP *%\reg

Both AMD and Intel recommend using INT3 after an indirect JMP. Make sure
to emit one when rewriting the retpoline JMP irrespective of compiler
SLS options or even CONFIG_SLS.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Alexei Starovoitov <alexei.starovoitov@gmail.com>
Link: https://lkml.kernel.org/r/Yxm+QkFPOhrVSH6q@hirez.programming.kicks-ass.net
arch/x86/kernel/alternative.c diff | blob | history
arch/x86/net/bpf_jit_comp.c diff | blob | history
Domain: System / Kernel;