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authorShubhrajyoti Datta <shubhrajyoti.datta@xilinx.com>2020-01-11 18:44:34 +0530
committerMichal Simek <michal.simek@xilinx.com>2020-02-04 11:38:59 +0100
commit061d2c1d593076424c910cb1b64ecdb5c9a6923f (patch)
tree97bfdb637af4be57527b9f4318e9fcb0f7bb7958 /arch/microblaze
parent2602276d3d3811b1a48c48113042cd75fcbfc27d (diff)
downloadlinux-061d2c1d593076424c910cb1b64ecdb5c9a6923f.tar.bz2
microblaze: Prevent the overflow of the start
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>
Diffstat (limited to 'arch/microblaze')
-rw-r--r--arch/microblaze/kernel/cpu/cache.c3
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)