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Diffstat (limited to 'net/ipv4/inet_diag.c')
-rw-r--r--net/ipv4/inet_diag.c14
1 files changed, 6 insertions, 8 deletions
diff --git a/net/ipv4/inet_diag.c b/net/ipv4/inet_diag.c
index 6ffe94c..3267d38 100644
--- a/net/ipv4/inet_diag.c
+++ b/net/ipv4/inet_diag.c
@@ -437,7 +437,7 @@ static int valid_cc(const void *bc, int len, int cc)
return 0;
if (cc == len)
return 1;
- if (op->yes < 4)
+ if (op->yes < 4 || op->yes & 3)
return 0;
len -= op->yes;
bc += op->yes;
@@ -447,11 +447,11 @@ static int valid_cc(const void *bc, int len, int cc)
static int inet_diag_bc_audit(const void *bytecode, int bytecode_len)
{
- const unsigned char *bc = bytecode;
+ const void *bc = bytecode;
int len = bytecode_len;
while (len > 0) {
- struct inet_diag_bc_op *op = (struct inet_diag_bc_op *)bc;
+ const struct inet_diag_bc_op *op = bc;
//printk("BC: %d %d %d {%d} / %d\n", op->code, op->yes, op->no, op[1].no, len);
switch (op->code) {
@@ -462,22 +462,20 @@ static int inet_diag_bc_audit(const void *bytecode, int bytecode_len)
case INET_DIAG_BC_S_LE:
case INET_DIAG_BC_D_GE:
case INET_DIAG_BC_D_LE:
- if (op->yes < 4 || op->yes > len + 4)
- return -EINVAL;
case INET_DIAG_BC_JMP:
- if (op->no < 4 || op->no > len + 4)
+ if (op->no < 4 || op->no > len + 4 || op->no & 3)
return -EINVAL;
if (op->no < len &&
!valid_cc(bytecode, bytecode_len, len - op->no))
return -EINVAL;
break;
case INET_DIAG_BC_NOP:
- if (op->yes < 4 || op->yes > len + 4)
- return -EINVAL;
break;
default:
return -EINVAL;
}
+ if (op->yes < 4 || op->yes > len + 4 || op->yes & 3)
+ return -EINVAL;
bc += op->yes;
len -= op->yes;
}
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