data_reg: calm down compilation warning in nftnl_data_reg_value_json_parse()

expr/data_reg.c: In function 'nftnl_data_reg_json_parse':
expr/data_reg.c:69:27: warning: '%d' directive writing between 1 and 10 bytes into a region of size 2 [-Wformat-overflow=]
   sprintf(node_name, "data%d", i);
                           ^~
expr/data_reg.c:69:22: note: directive argument in the range [0, 2147483647]
   sprintf(node_name, "data%d", i);

Buffer overflow is triggerable when reg->len > 396, but len never goes
over 128 due to type validation just a bit before.

Use snprintf() and make sure buffer is large enough to store the
"data256" string.

Reported-by: Jan Engelhardt <jengelh@inai.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

0 files changed, 0 insertions, 0 deletions