From be0bae0ad31b0adb506f96de083f52a2bd0d4fbf Mon Sep 17 00:00:00 2001 From: Phil Sutter Date: Thu, 7 Mar 2024 14:49:08 +0100 Subject: expr: Respect data_len when setting attributes With attr_policy in place, data_len has an upper boundary but it may be lower than the attribute's storage area in which case memcpy() would read garbage. Signed-off-by: Phil Sutter --- src/expr/bitwise.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) (limited to 'src/expr/bitwise.c') diff --git a/src/expr/bitwise.c b/src/expr/bitwise.c index dab1690..e99131a 100644 --- a/src/expr/bitwise.c +++ b/src/expr/bitwise.c @@ -39,16 +39,16 @@ nftnl_expr_bitwise_set(struct nftnl_expr *e, uint16_t type, switch(type) { case NFTNL_EXPR_BITWISE_SREG: - memcpy(&bitwise->sreg, data, sizeof(bitwise->sreg)); + memcpy(&bitwise->sreg, data, data_len); break; case NFTNL_EXPR_BITWISE_DREG: - memcpy(&bitwise->dreg, data, sizeof(bitwise->dreg)); + memcpy(&bitwise->dreg, data, data_len); break; case NFTNL_EXPR_BITWISE_OP: - memcpy(&bitwise->op, data, sizeof(bitwise->op)); + memcpy(&bitwise->op, data, data_len); break; case NFTNL_EXPR_BITWISE_LEN: - memcpy(&bitwise->len, data, sizeof(bitwise->len)); + memcpy(&bitwise->len, data, data_len); break; case NFTNL_EXPR_BITWISE_MASK: return nftnl_data_cpy(&bitwise->mask, data, data_len); -- cgit v1.2.3