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| author | Shubhrajyoti Datta <shubhrajyoti.datta@xilinx.com> | 2020-01-11 16:14:34 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-02-28 18:36:08 +0300 |
| commit | aa9c1f410398a2a70e03bd23f8c80c0699948259 (patch) | |
| tree | 7cd0bdf7d8626e9e947c81091c70af5919c9e3c5 /arch/microblaze | |
| parent | 16ccc575ff186a051dfe595db582e4f929e2356a (diff) | |
| download | linux-aa9c1f410398a2a70e03bd23f8c80c0699948259.tar.xz | |
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/microblaze')
| -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) |