![]() Address KCOV vs noinstr. There is no function attribute to selectively suppress KCOV instrumentation, instead teach objtool to NOP out the calls in noinstr functions. This cures a bunch of KCOV crashes (as used by syzcaller). -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEzv7L6UO9uDPlPSfHEsHwGGHeVUoFAl74pC0ACgkQEsHwGGHe VUobXA//cJvRCujUriL6HjZZxmqrWKYyB4kH4yFVycJ7DRflGk3QGLpnHJifWWUL eG50obtNI+KOWrr/0lY7XURZgr1mVDe0L3z0tdBJH/rCiQPraDf2JPpCSRRtdq/a MvbRXE14z3YLeRI2CurRBH+ZmveBRu2Gv9APPym0CqGBhX3rRRKoyOOiQS95PCZB pehuYjbLLrLCQvFoANq3ZwHyLZzczhhwgVBSl+UgdDBwrbM5VC6ByxtEkRgcwoqt Tvhji0HqjV4Nqu23/PUsR53hkp+kQrdfe2vaC7IeISWxusMTXCMFOYlZNR4xnQ/f M7No8eZK+/j7KsI6/8hfRMvTeis21IMUCV9gRXZYpSWfbf4vKBsYFoIAMxQTNyBo t/7BUqwTA9eLtUoaTCZim5a/n1nNWWPnnd74DYmQ7KilGgS3HO9dDwNrPnJhDUYZ Ed6Wb0Jgk4s8+TxQEEx8j9bVfpxJGuL+BzcrqdRSCIHV12CRRzUigSadW5/4OR6S XNVzY1Si0RGKI5K3OJAZDP5YaPWNXu8SwQUzaZDXjt8qavljqvDfY7GXIdhRNPCY 6o/H8i/iHXn5v3nSpGKrAeDBqXP8BncvP2ux1Zs3/uBdPgU1dFcYBrUEZxStjDWU tyX6tNIU7pGMvXSiEsKzSpb1/LkzR+zG7z//DC3WCYNqP4KdaoE= =0Wd6 -----END PGP SIGNATURE----- Merge tag 'objtool_urgent_for_5.8_rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull objtool fixes from Borislav Petkov: "Three fixes from Peter Zijlstra suppressing KCOV instrumentation in noinstr sections. Peter Zijlstra says: "Address KCOV vs noinstr. There is no function attribute to selectively suppress KCOV instrumentation, instead teach objtool to NOP out the calls in noinstr functions" This cures a bunch of KCOV crashes (as used by syzcaller)" * tag 'objtool_urgent_for_5.8_rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: objtool: Fix noinstr vs KCOV objtool: Provide elf_write_{insn,reloc}() objtool: Clean up elf_write() condition |
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