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Date: Thu, 17 Mar 2016 12:04:30 +0000 From: 平松雅巳 / HIRAMATU,MASAMI <masami.hiramatsu.pt@...achi.com> To: "'David Long'" <dave.long@...aro.org>, Catalin Marinas <catalin.marinas@....com>, Will Deacon <will.deacon@....com>, Sandeepa Prabhu <sandeepa.s.prabhu@...il.com>, William Cohen <wcohen@...hat.com>, "Pratyush Anand" <panand@...hat.com>, Steve Capper <steve.capper@...aro.org>, "linux-arm-kernel@...ts.infradead.org" <linux-arm-kernel@...ts.infradead.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, Marc Zyngier <marc.zyngier@....com> CC: Mark Rutland <mark.rutland@....com>, Petr Mladek <pmladek@...e.com>, Viresh Kumar <viresh.kumar@...aro.org>, John Blackwood <john.blackwood@...r.com>, Feng Kan <fkan@....com>, Zi Shen Lim <zlim.lnx@...il.com>, Dave P Martin <Dave.Martin@....com>, Yang Shi <yang.shi@...aro.org>, Vladimir Murzin <Vladimir.Murzin@....com>, Kees Cook <keescook@...omium.org>, "Suzuki K. Poulose" <suzuki.poulose@....com>, "Mark Brown" <broonie@...nel.org>, Alex Bennée <alex.bennee@...aro.org>, Ard Biesheuvel <ard.biesheuvel@...aro.org>, "Greg Kroah-Hartman" <gregkh@...uxfoundation.org>, Mark Salyzyn <salyzyn@...roid.com>, James Morse <james.morse@....com>, Christoffer Dall <christoffer.dall@...aro.org>, Andrew Morton <akpm@...ux-foundation.org>, Robin Murphy <Robin.Murphy@....com>, Jens Wiklander <jens.wiklander@...aro.org>, Balamurugan Shanmugam <bshanmugam@....com>, sysp-manager <cti.systems-productivity-manager.ts@...achi.com> Subject: RE: [PATCH v11 3/9] arm64: add copy_to/from_user to kprobes blacklist >From: "David A. Long" <dave.long@...aro.org> > >Currrently taking exceptions when accessing user data from a kprobe'd >instruction doesn't work. Avoid this situation by blacklisting the relevant >functions. > >Signed-off-by: David A. Long <dave.long@...aro.org> Looks good to me. Reviewed-by: Masami Hiramatsu <masami.hiramatsu.pt@...achi.com> Thanks, >--- > arch/arm64/lib/copy_from_user.S | 1 + > arch/arm64/lib/copy_to_user.S | 1 + > 2 files changed, 2 insertions(+) > >diff --git a/arch/arm64/lib/copy_from_user.S b/arch/arm64/lib/copy_from_user.S >index 4699cd7..0ac2131 100644 >--- a/arch/arm64/lib/copy_from_user.S >+++ b/arch/arm64/lib/copy_from_user.S >@@ -66,6 +66,7 @@ > .endm > > end .req x5 >+ .section .kprobes.text,"ax",%progbits > ENTRY(__copy_from_user) > ALTERNATIVE("nop", __stringify(SET_PSTATE_PAN(0)), ARM64_HAS_PAN, \ > CONFIG_ARM64_PAN) >diff --git a/arch/arm64/lib/copy_to_user.S b/arch/arm64/lib/copy_to_user.S >index 7512bbb..e4eb84c 100644 >--- a/arch/arm64/lib/copy_to_user.S >+++ b/arch/arm64/lib/copy_to_user.S >@@ -65,6 +65,7 @@ > .endm > > end .req x5 >+ .section .kprobes.text,"ax",%progbits > ENTRY(__copy_to_user) > ALTERNATIVE("nop", __stringify(SET_PSTATE_PAN(0)), ARM64_HAS_PAN, \ > CONFIG_ARM64_PAN) >-- >2.5.0 > > >_______________________________________________ >linux-arm-kernel mailing list >linux-arm-kernel@...ts.infradead.org >http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
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