ARM: OMAP2+: Fix -Warray-bounds warning in _pwrdm_state_switch()
commit 847fb80c upstream. If function pwrdm_read_prev_pwrst() returns -EINVAL, we will end up accessing array pwrdm->state_counter through negative index -22. This is wrong and the compiler is legitimately warning us about this potential problem. Fix this by sanity checking the value stored in variable _prev_ before accessing array pwrdm->state_counter. Address the following -Warray-bounds warning: arch/arm/mach-omap2/powerdomain.c:178:45: warning: array subscript -22 is below array bounds of 'unsigned int[4]' [-Warray-bounds] Link: https://github.com/KSPP/linux/issues/307 Fixes: ba20bb12 ("OMAP: PM counter infrastructure.") Cc: stable@vger.kernel.org Reported-by:kernel test robot <lkp@intel.com> Link: https://lore.kernel.org/lkml/20230607050639.LzbPn%25lkp@intel.com/ Signed-off-by:
Gustavo A. R. Silva <gustavoars@kernel.org> Message-ID: <ZIFVGwImU3kpaGeH@work> Acked-by:
Ard Biesheuvel <ardb@kernel.org> Signed-off-by:
Tony Lindgren <tony@atomide.com> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
parent
f53ab5a2
Please register or sign in to comment