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local_sendmsg: fix peer->lc_cfps[] array out-of-range write 

When peer->lc_cfpcount == LOCAL_NCONTROLFDS,
Line 122: peer->lc_cfps[peer->lc_cfpcount++] = filep2; access
out-of-range

Signed-off-by: Bowen Wang <wangbowen6@xiaomi.com>
This commit is contained in:
Bowen Wang 2023-10-12 14:50:17 +08:00 committed by Xiang Xiao
parent ce16288494
commit 7a9aa9539c
1 changed files with 1 additions and 1 deletions
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2
net/local/local_sendmsg.c
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@ -91,7 +91,7 @@ static int local_sendctl(FAR struct local_conn_s *conn,
fds = (int *)CMSG_DATA(cmsg);
count = (cmsg->cmsg_len - sizeof(struct cmsghdr)) / sizeof(int);
if (count + peer->lc_cfpcount > LOCAL_NCONTROLFDS)
if (count + peer->lc_cfpcount >= LOCAL_NCONTROLFDS)
{
ret = -EMFILE;
goto fail;