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Date: Thu, 7 Apr 2022 11:14:52 +0100 From: Sudeep Holla <sudeep.holla@....com> To: Liviu Dudau <liviu.dudau@....com>, Kees Cook <keescook@...omium.org> Cc: Sudeep Holla <sudeep.holla@....com>, Lorenzo Pieralisi <lorenzo.pieralisi@....com>, Russell King <linux@...linux.org.uk>, linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, linux-hardening@...r.kernel.org Subject: Re: [PATCH] ARM: vexpress/spc: Avoid negative array index when !SMP On Thu, 31 Mar 2022 12:04:43 -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 }; > | ^~~~~~~~~~~~~~ > > [...] Applied to sudeep.holla/linux (fixes/vexpress), thanks! [1/1] ARM: vexpress/spc: Avoid negative array index when !SMP https://git.kernel.org/sudeep.holla/c/b3f1dd52c9 -- Regards, Sudeep
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