From: Liviu Dudau <liviu.dudau@arm.com> To: Kees Cook <keescook@chromium.org> Cc: Sudeep Holla <sudeep.holla@arm.com>, Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>, Russell King <linux@armlinux.org.uk>, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-hardening@vger.kernel.org Subject: Re: [PATCH] ARM: vexpress/spc: Avoid negative array index when !SMP Date: Fri, 1 Apr 2022 10:28:29 +0100 [thread overview] Message-ID: <YkbFvYRkcXgo3mpK@e110455-lin.cambridge.arm.com> (raw) In-Reply-To: <20220331190443.851661-1-keescook@chromium.org> On Thu, Mar 31, 2022 at 12:04:43PM -0700, Kees Cook wrote: > When building multi_v7_defconfig+CONFIG_SMP=n, -Warray-bounds exposes > a couple negative array index accesses: > > arch/arm/mach-vexpress/spc.c: In function 've_spc_clk_init': > arch/arm/mach-vexpress/spc.c:583:21: warning: array subscript -1 is below array bounds of 'bool[2]' {aka '_Bool[2]'} [-Warray-bounds] > 583 | if (init_opp_table[cluster]) > | ~~~~~~~~~~~~~~^~~~~~~~~ > arch/arm/mach-vexpress/spc.c:556:7: note: while referencing 'init_opp_table' > 556 | bool init_opp_table[MAX_CLUSTERS] = { false }; > | ^~~~~~~~~~~~~~ > arch/arm/mach-vexpress/spc.c:592:18: warning: array subscript -1 is below array bounds of 'bool[2]' {aka '_Bool[2]'} [-Warray-bounds] > 592 | init_opp_table[cluster] = true; > | ~~~~~~~~~~~~~~^~~~~~~~~ > arch/arm/mach-vexpress/spc.c:556:7: note: while referencing 'init_opp_table' > 556 | bool init_opp_table[MAX_CLUSTERS] = { false }; > | ^~~~~~~~~~~~~~ > > Skip this logic when built !SMP. > > Cc: Liviu Dudau <liviu.dudau@arm.com> > Cc: Sudeep Holla <sudeep.holla@arm.com> > Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> > Cc: Russell King <linux@armlinux.org.uk> > Cc: linux-arm-kernel@lists.infradead.org > Signed-off-by: Kees Cook <keescook@chromium.org> Acked-by: Liviu Dudau <liviu.dudau@arm.com> Sudeep, can you please take this through your tree for sending it to arm-soc? Best regards, Liviu > --- > arch/arm/mach-vexpress/spc.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/arch/arm/mach-vexpress/spc.c b/arch/arm/mach-vexpress/spc.c > index 1da11bdb1dfb..1c6500c4e6a1 100644 > --- a/arch/arm/mach-vexpress/spc.c > +++ b/arch/arm/mach-vexpress/spc.c > @@ -580,7 +580,7 @@ static int __init ve_spc_clk_init(void) > } > > cluster = topology_physical_package_id(cpu_dev->id); > - if (init_opp_table[cluster]) > + if (cluster < 0 || init_opp_table[cluster]) > continue; > > if (ve_init_opp_table(cpu_dev)) > -- > 2.32.0 > -- ==================== | I would like to | | fix the world, | | but they're not | | giving me the | \ source code! / --------------- ¯\_(ツ)_/¯
WARNING: multiple messages have this Message-ID (diff)
From: Liviu Dudau <liviu.dudau@arm.com> To: Kees Cook <keescook@chromium.org> Cc: Sudeep Holla <sudeep.holla@arm.com>, Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>, Russell King <linux@armlinux.org.uk>, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-hardening@vger.kernel.org Subject: Re: [PATCH] ARM: vexpress/spc: Avoid negative array index when !SMP Date: Fri, 1 Apr 2022 10:28:29 +0100 [thread overview] Message-ID: <YkbFvYRkcXgo3mpK@e110455-lin.cambridge.arm.com> (raw) In-Reply-To: <20220331190443.851661-1-keescook@chromium.org> On Thu, Mar 31, 2022 at 12:04:43PM -0700, Kees Cook wrote: > When building multi_v7_defconfig+CONFIG_SMP=n, -Warray-bounds exposes > a couple negative array index accesses: > > arch/arm/mach-vexpress/spc.c: In function 've_spc_clk_init': > arch/arm/mach-vexpress/spc.c:583:21: warning: array subscript -1 is below array bounds of 'bool[2]' {aka '_Bool[2]'} [-Warray-bounds] > 583 | if (init_opp_table[cluster]) > | ~~~~~~~~~~~~~~^~~~~~~~~ > arch/arm/mach-vexpress/spc.c:556:7: note: while referencing 'init_opp_table' > 556 | bool init_opp_table[MAX_CLUSTERS] = { false }; > | ^~~~~~~~~~~~~~ > arch/arm/mach-vexpress/spc.c:592:18: warning: array subscript -1 is below array bounds of 'bool[2]' {aka '_Bool[2]'} [-Warray-bounds] > 592 | init_opp_table[cluster] = true; > | ~~~~~~~~~~~~~~^~~~~~~~~ > arch/arm/mach-vexpress/spc.c:556:7: note: while referencing 'init_opp_table' > 556 | bool init_opp_table[MAX_CLUSTERS] = { false }; > | ^~~~~~~~~~~~~~ > > Skip this logic when built !SMP. > > Cc: Liviu Dudau <liviu.dudau@arm.com> > Cc: Sudeep Holla <sudeep.holla@arm.com> > Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> > Cc: Russell King <linux@armlinux.org.uk> > Cc: linux-arm-kernel@lists.infradead.org > Signed-off-by: Kees Cook <keescook@chromium.org> Acked-by: Liviu Dudau <liviu.dudau@arm.com> Sudeep, can you please take this through your tree for sending it to arm-soc? Best regards, Liviu > --- > arch/arm/mach-vexpress/spc.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/arch/arm/mach-vexpress/spc.c b/arch/arm/mach-vexpress/spc.c > index 1da11bdb1dfb..1c6500c4e6a1 100644 > --- a/arch/arm/mach-vexpress/spc.c > +++ b/arch/arm/mach-vexpress/spc.c > @@ -580,7 +580,7 @@ static int __init ve_spc_clk_init(void) > } > > cluster = topology_physical_package_id(cpu_dev->id); > - if (init_opp_table[cluster]) > + if (cluster < 0 || init_opp_table[cluster]) > continue; > > if (ve_init_opp_table(cpu_dev)) > -- > 2.32.0 > -- ==================== | I would like to | | fix the world, | | but they're not | | giving me the | \ source code! / --------------- ¯\_(ツ)_/¯ _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2022-04-01 9:28 UTC|newest] Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-03-31 19:04 [PATCH] ARM: vexpress/spc: Avoid negative array index when !SMP Kees Cook 2022-03-31 19:04 ` Kees Cook 2022-04-01 9:28 ` Liviu Dudau [this message] 2022-04-01 9:28 ` Liviu Dudau 2022-04-01 10:11 ` Sudeep Holla 2022-04-01 10:11 ` Sudeep Holla 2022-04-01 10:32 ` Liviu Dudau 2022-04-01 10:32 ` Liviu Dudau 2022-04-07 10:14 ` Sudeep Holla 2022-04-07 10:14 ` Sudeep Holla
Reply instructions: You may reply publicly to this message via plain-text email using any one of the following methods: * Save the following mbox file, import it into your mail client, and reply-to-all from there: mbox Avoid top-posting and favor interleaved quoting: https://en.wikipedia.org/wiki/Posting_style#Interleaved_style * Reply using the --to, --cc, and --in-reply-to switches of git-send-email(1): git send-email \ --in-reply-to=YkbFvYRkcXgo3mpK@e110455-lin.cambridge.arm.com \ --to=liviu.dudau@arm.com \ --cc=keescook@chromium.org \ --cc=linux-arm-kernel@lists.infradead.org \ --cc=linux-hardening@vger.kernel.org \ --cc=linux-kernel@vger.kernel.org \ --cc=linux@armlinux.org.uk \ --cc=lorenzo.pieralisi@arm.com \ --cc=sudeep.holla@arm.com \ /path/to/YOUR_REPLY https://kernel.org/pub/software/scm/git/docs/git-send-email.html * If your mail client supports setting the In-Reply-To header via mailto: links, try the mailto: linkBe sure your reply has a Subject: header at the top and a blank line before the message body.
This is an external index of several public inboxes, see mirroring instructions on how to clone and mirror all data and code used by this external index.