Messages in this thread | | | From | Petr Pavlu <> | Subject | [PATCH v2 0/2] x86/retpoline,kprobes: Fix the [__indirect_thunk_start, ..end] range | Date | Tue, 11 Jul 2023 11:19:50 +0200 |
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Fix problems with an output position of thunk sections and the associated definition of range [__indirect_thunk_start, __indirect_thunk_end] which affects the kprobes optimization.
Initial v1 of the series kept the mentioned range but it turns out the logic which uses it is not necessary so it is removed altogether.
Changes since v1 [1]: - Drop the patch which moved the return thunk out of [__indirect_thunk_start, ..end] and instead replace it with a removal of the kprobes optimization check which looked for calls to indirect thunks. - Slightly adjust the commit message for the first patch, to better match the new second patch.
[1] https://lore.kernel.org/lkml/20230705081547.25130-1-petr.pavlu@suse.com/
Petr Pavlu (2): x86/retpoline,kprobes: Fix position of thunk sections with CONFIG_LTO_CLANG x86/retpoline,kprobes: Skip optprobe check for indirect jumps with retpolines and IBT
arch/x86/include/asm/nospec-branch.h | 3 --- arch/x86/kernel/kprobes/opt.c | 40 +++++++++++----------------- arch/x86/kernel/vmlinux.lds.S | 4 +-- arch/x86/lib/retpoline.S | 4 +-- tools/perf/util/thread-stack.c | 4 +-- 5 files changed, 20 insertions(+), 35 deletions(-)
-- 2.35.3
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