diff options
| author | Shubhrajyoti Datta <shubhrajyoti.datta@xilinx.com> | 2020-01-11 18:44:34 +0530 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-02-28 15:42:42 +0100 |
| commit | 387da85c98572cc54744384ce4ffea6e5c1ee091 (patch) | |
| tree | c692791144a9ab19ab51637e7cfa3ae940c7411f /arch | |
| parent | 00e96fba9515fcb6af8674ef11761d6f39672eeb (diff) | |
microblaze: Prevent the overflow of the start
[ Upstream commit 061d2c1d593076424c910cb1b64ecdb5c9a6923f ]
In case the start + cache size is more than the max int the
start overflows.
Prevent the same.
Signed-off-by: Shubhrajyoti Datta <shubhrajyoti.datta@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/microblaze/kernel/cpu/cache.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/microblaze/kernel/cpu/cache.c b/arch/microblaze/kernel/cpu/cache.c index 0bde47e4fa69..dcba53803fa5 100644 --- a/arch/microblaze/kernel/cpu/cache.c +++ b/arch/microblaze/kernel/cpu/cache.c @@ -92,7 +92,8 @@ static inline void __disable_dcache_nomsr(void) #define CACHE_LOOP_LIMITS(start, end, cache_line_length, cache_size) \ do { \ int align = ~(cache_line_length - 1); \ - end = min(start + cache_size, end); \ + if (start < UINT_MAX - cache_size) \ + end = min(start + cache_size, end); \ start &= align; \ } while (0) |