ahill/libmnl
1
0
Fork 0
mirror of https://git.netfilter.org/libmnl synced 2026-01-26 10:34:28 +00:00
Code Issues Packages Projects Releases Wiki Activity

examples: genl: fix wrong attribute size

Browse Source 
This example no longer works on more recent kernels:

genl-family-get
error: Invalid argument

dmesg says:
netlink: 'genl-family-get': attribute type 1 has an invalid length.

Fix this and also zero out the reserved field in the genl header,
while not validated yet for dumps this could change.

Reported-by: Divyanshu Rathore <Divyanshu.Rathore@bmwtechworks.in>
Signed-off-by: Florian Westphal <fw@strlen.de>
This commit is contained in:
Florian Westphal 2025-09-15 14:40:30 +02:00
parent 03da98bcd2
commit 54dea548d7
1 changed files with 2 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
examples/genl/genl-family-get.c
View File

@ -199,8 +199,9 @@ int main(int argc, char *argv[])
genl = mnl_nlmsg_put_extra_header(nlh, sizeof(struct genlmsghdr));
genl->cmd = CTRL_CMD_GETFAMILY;
genl->version = 1;
genl->reserved = 0;
mnl_attr_put_u32(nlh, CTRL_ATTR_FAMILY_ID, GENL_ID_CTRL);
mnl_attr_put_u16(nlh, CTRL_ATTR_FAMILY_ID, GENL_ID_CTRL);
if (argc >= 2)
mnl_attr_put_strz(nlh, CTRL_ATTR_FAMILY_NAME, argv[1]);
else