erofs-utils: lib: fix potential overflow issue

Change 8U to 8ULL to avoid arithmetic multiplication overflow.

Coverity-id: 502353
Signed-off-by: Hongzhen Luo <hongzhen@linux.alibaba.com>
Link: https://lore.kernel.org/r/20240813121023.781122-1-hongzhen@linux.alibaba.com
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>

diff --git a/lib/kite_deflate.c b/lib/kite_deflate.c
index 8581834591d15a56acc7f41dbf52e3fe0819e8be..4b1068b50b48f9d94f4550aba7efc9e64dbc9c7b 100644 (file)
--- a/lib/kite_deflate.c
+++ b/lib/kite_deflate.c
@@ -892,7 +892,7 @@ static bool deflate_count_code(struct kite_deflate *s, bool literal,
 {
        struct kite_deflate_table *t = s->tab;
        unsigned int lenbase = (literal ? 0 : kSymbolMatch);
-       u64 rem = (s->outlen - s->pos_out) * 8 - s->bitpos;
+       u64 rem = (s->outlen - s->pos_out) * 8ULL - s->bitpos;
        bool recalc = false;
        unsigned int bits;