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Diffstat (limited to 'net')
-rw-r--r--net/core/filter.c32
1 files changed, 16 insertions, 16 deletions
diff --git a/net/core/filter.c b/net/core/filter.c
index 765556ba32ef..e08b3822c72a 100644
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -295,43 +295,43 @@ select_insn:
(*(s64 *) &A) >>= K;
CONT;
BPF_ALU64_BPF_MOD_BPF_X:
+ if (unlikely(X == 0))
+ return 0;
tmp = A;
- if (X)
- A = do_div(tmp, X);
+ A = do_div(tmp, X);
CONT;
BPF_ALU_BPF_MOD_BPF_X:
+ if (unlikely(X == 0))
+ return 0;
tmp = (u32) A;
- if (X)
- A = do_div(tmp, (u32) X);
+ A = do_div(tmp, (u32) X);
CONT;
BPF_ALU64_BPF_MOD_BPF_K:
tmp = A;
- if (K)
- A = do_div(tmp, K);
+ A = do_div(tmp, K);
CONT;
BPF_ALU_BPF_MOD_BPF_K:
tmp = (u32) A;
- if (K)
- A = do_div(tmp, (u32) K);
+ A = do_div(tmp, (u32) K);
CONT;
BPF_ALU64_BPF_DIV_BPF_X:
- if (X)
- do_div(A, X);
+ if (unlikely(X == 0))
+ return 0;
+ do_div(A, X);
CONT;
BPF_ALU_BPF_DIV_BPF_X:
+ if (unlikely(X == 0))
+ return 0;
tmp = (u32) A;
- if (X)
- do_div(tmp, (u32) X);
+ do_div(tmp, (u32) X);
A = (u32) tmp;
CONT;
BPF_ALU64_BPF_DIV_BPF_K:
- if (K)
- do_div(A, K);
+ do_div(A, K);
CONT;
BPF_ALU_BPF_DIV_BPF_K:
tmp = (u32) A;
- if (K)
- do_div(tmp, (u32) K);
+ do_div(tmp, (u32) K);
A = (u32) tmp;
CONT;
BPF_ALU_BPF_END_BPF_TO_BE: