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-rw-r--r--net/core/filter.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/net/core/filter.c b/net/core/filter.c
index 079c2edff789..2841bfce29d6 100644
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -116,8 +116,6 @@ int sk_run_filter(struct sk_buff *skb, struct sock_filter *filter, int flen)
116 A /= X; 116 A /= X;
117 continue; 117 continue;
118 case BPF_ALU|BPF_DIV|BPF_K: 118 case BPF_ALU|BPF_DIV|BPF_K:
119 if (fentry->k == 0)
120 return 0;
121 A /= fentry->k; 119 A /= fentry->k;
122 continue; 120 continue;
123 case BPF_ALU|BPF_AND|BPF_X: 121 case BPF_ALU|BPF_AND|BPF_X:
@@ -320,6 +318,10 @@ int sk_chk_filter(struct sock_filter *filter, int flen)
320 } 318 }
321 } 319 }
322 320
321 /* check for division by zero -Kris Katterjohn 2005-10-30 */
322 if (ftest->code == (BPF_ALU|BPF_DIV|BPF_K) && ftest->k == 0)
323 return -EINVAL;
324
323 /* check that memory operations use valid addresses. */ 325 /* check that memory operations use valid addresses. */
324 if (ftest->k >= BPF_MEMWORDS) { 326 if (ftest->k >= BPF_MEMWORDS) {
325 /* but it might not be a memory operation... */ 327 /* but it might not be a memory operation... */