diff options
| -rw-r--r-- | net/core/filter.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/net/core/filter.c b/net/core/filter.c index c0b68f7..23e0a2a 100644 --- a/net/core/filter.c +++ b/net/core/filter.c @@ -37,6 +37,7 @@ #include <asm/uaccess.h> #include <asm/unaligned.h> #include <linux/filter.h> +#include <linux/reciprocal_div.h> enum { BPF_S_RET_K = 1, @@ -205,7 +206,7 @@ unsigned int sk_run_filter(struct sk_buff *skb, const struct sock_filter *fentry A /= X; continue; case BPF_S_ALU_DIV_K: - A /= K; + A = reciprocal_divide(A, K); continue; case BPF_S_ALU_AND_X: A &= X; @@ -506,6 +507,7 @@ int sk_chk_filter(struct sock_filter *filter, int flen) /* check for division by zero */ if (ftest->k == 0) return -EINVAL; + ftest->k = reciprocal_value(ftest->k); break; case BPF_S_LD_MEM: case BPF_S_LDX_MEM: |
