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| author | Peter Zijlstra <peterz@infradead.org> | 2023-08-16 13:59:21 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-08-26 13:27:00 +0200 |
| commit | 4da4aae04b7f3d5ba4345a75f92de00a54644f11 (patch) | |
| tree | 616e3621ca433a674ecc42fee485e97832220266 /lib | |
| parent | c8b056a3b4ebb33adbb873cab152ed499d1a1dcb (diff) | |
| download | linux-4da4aae04b7f3d5ba4345a75f92de00a54644f11.tar.gz | |
objtool/x86: Fixup frame-pointer vs rethunk
commit dbf46008775516f7f25c95b7760041c286299783 upstream.
For stack-validation of a frame-pointer build, objtool validates that
every CALL instruction is preceded by a frame-setup. The new SRSO
return thunks violate this with their RSB stuffing trickery.
Extend the __fentry__ exception to also cover the embedded_insn case
used for this. This cures:
vmlinux.o: warning: objtool: srso_untrain_ret+0xd: call without frame pointer save/setup
Fixes: 4ae68b26c3ab ("objtool/x86: Fix SRSO mess")
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Acked-by: Josh Poimboeuf <jpoimboe@kernel.org>
Link: https://lore.kernel.org/r/20230816115921.GH980931@hirez.programming.kicks-ass.net
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'lib')
0 files changed, 0 insertions, 0 deletions