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/fwd.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'src/expr/fwd.c') diff --git a/src/expr/fwd.c b/src/expr/fwd.c index 566d6f4..04cb089 100644 --- a/src/expr/fwd.c +++ b/src/expr/fwd.c @@ -33,13 +33,13 @@ static int nftnl_expr_fwd_set(struct nftnl_expr *e, uint16_t type, switch (type) { case NFTNL_EXPR_FWD_SREG_DEV: - memcpy(&fwd->sreg_dev, data, sizeof(fwd->sreg_dev)); + memcpy(&fwd->sreg_dev, data, data_len); break; case NFTNL_EXPR_FWD_SREG_ADDR: - memcpy(&fwd->sreg_addr, data, sizeof(fwd->sreg_addr)); + memcpy(&fwd->sreg_addr, data, data_len); break; case NFTNL_EXPR_FWD_NFPROTO: - memcpy(&fwd->nfproto, data, sizeof(fwd->nfproto)); + memcpy(&fwd->nfproto, data, data_len); break; } return 0; -- cgit v1.2.3