This is a note to let you know that I've just added the patch titled
ARM: OMAP2+: Fix -Warray-bounds warning in _pwrdm_state_switch()
to the 6.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
arm-omap2-fix-warray-bounds-warning-in-_pwrdm_state_switch.patch
and it can be found in the queue-6.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 847fb80cc01a54bc827b02547bb8743bdb59ddab Mon Sep 17 00:00:00 2001
From: "Gustavo A. R. Silva" <gustavoars@xxxxxxxxxx>
Date: Wed, 7 Jun 2023 22:12:11 -0600
Subject: ARM: OMAP2+: Fix -Warray-bounds warning in _pwrdm_state_switch()
From: Gustavo A. R. Silva <gustavoars@xxxxxxxxxx>
commit 847fb80cc01a54bc827b02547bb8743bdb59ddab 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: ba20bb126940 ("OMAP: PM counter infrastructure.")
Cc: stable@xxxxxxxxxxxxxxx
Reported-by: kernel test robot <lkp@xxxxxxxxx>
Link: https://lore.kernel.org/lkml/20230607050639.LzbPn%25lkp@xxxxxxxxx/
Signed-off-by: Gustavo A. R. Silva <gustavoars@xxxxxxxxxx>
Message-ID: <ZIFVGwImU3kpaGeH@work>
Acked-by: Ard Biesheuvel <ardb@xxxxxxxxxx>
Signed-off-by: Tony Lindgren <tony@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/arm/mach-omap2/powerdomain.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/arm/mach-omap2/powerdomain.c
+++ b/arch/arm/mach-omap2/powerdomain.c
@@ -174,7 +174,7 @@ static int _pwrdm_state_switch(struct po
break;
case PWRDM_STATE_PREV:
prev = pwrdm_read_prev_pwrst(pwrdm);
- if (pwrdm->state != prev)
+ if (prev >= 0 && pwrdm->state != prev)
pwrdm->state_counter[prev]++;
if (prev == PWRDM_POWER_RET)
_update_logic_membank_counters(pwrdm);
Patches currently in stable-queue which might be from gustavoars@xxxxxxxxxx are
queue-6.4/rdma-irdma-replace-one-element-array-with-flexible-a.patch
queue-6.4/arm-omap2-fix-warray-bounds-warning-in-_pwrdm_state_switch.patch
