ARM: 9520/1: cacheinfo: avoid out-of-bounds write in populate_cache_leaves()

populate_cache_leaves() advances its bounds-checking index once per
cache level, but split instruction/data caches consume two entries.
CLIDR-based allocation supplies enough entries. Early allocation from
the device tree can supply fewer and expose an out-of-bounds write.

Count each written leaf and stop before a split level that does not
fit. This prepares ARM for DT-based early allocation and matches
commit 875d742cf532 ("arm64: cacheinfo: Avoid out-of-bounds write to
cacheinfo array").

Assisted-by: LLM

Fixes: a9ff94477836 ("ARM: 9433/2: implement cacheinfo support")
Cc: stable@vger.kernel.org
Tested-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Link: https://lore.kernel.org/r/20260912195552.76673-2-kmehltretter@gmail.com/
Signed-off-by: Karl Mehltretter <kmehltretter@gmail.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>

0 files changed, 0 insertions, 0 deletions