diff options
| author | Jakub Kicinski <kuba@kernel.org> | 2022-11-04 12:13:34 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2022-11-07 12:30:16 +0000 |
| commit | 7747eb75f6185a92db2e4a2643fdf6e4b6d87153 (patch) | |
| tree | dc000cf24464b445cd0a6c788824f0b0a6594c45 /net/netlink/genetlink.c | |
| parent | 20b0b53aca436af9fece9428ca3ab7c7b9cf4583 (diff) | |
| download | lwn-7747eb75f6185a92db2e4a2643fdf6e4b6d87153.tar.gz lwn-7747eb75f6185a92db2e4a2643fdf6e4b6d87153.zip | |
genetlink: load policy based on validation flags
Set the policy and maxattr pointers based on validation flags.
genl_family_rcv_msg_attrs_parse() will do nothing and return NULL
if maxattrs is zero, so no behavior change is expected.
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/netlink/genetlink.c')
| -rw-r--r-- | net/netlink/genetlink.c | 17 |
1 files changed, 10 insertions, 7 deletions
diff --git a/net/netlink/genetlink.c b/net/netlink/genetlink.c index c66299740c05..770726ac491e 100644 --- a/net/netlink/genetlink.c +++ b/net/netlink/genetlink.c @@ -204,8 +204,14 @@ genl_cmd_full_to_split(struct genl_split_ops *op, op->post_doit = family->post_doit; } - op->policy = full->policy; - op->maxattr = full->maxattr; + if (flags & GENL_CMD_CAP_DUMP && + full->validate & GENL_DONT_VALIDATE_DUMP) { + op->policy = NULL; + op->maxattr = 0; + } else { + op->policy = full->policy; + op->maxattr = full->maxattr; + } op->cmd = full->cmd; op->internal_flags = full->internal_flags; @@ -638,10 +644,8 @@ static int genl_start(struct netlink_callback *cb) int rc = 0; ops = ctx->ops; - if (ops->validate & GENL_DONT_VALIDATE_DUMP) - goto no_attrs; - - if (ctx->nlh->nlmsg_len < nlmsg_msg_size(ctx->hdrlen)) + if (!(ops->validate & GENL_DONT_VALIDATE_DUMP) && + ctx->nlh->nlmsg_len < nlmsg_msg_size(ctx->hdrlen)) return -EINVAL; attrs = genl_family_rcv_msg_attrs_parse(ctx->family, ctx->nlh, ctx->extack, @@ -650,7 +654,6 @@ static int genl_start(struct netlink_callback *cb) if (IS_ERR(attrs)) return PTR_ERR(attrs); -no_attrs: info = genl_dumpit_info_alloc(); if (!info) { genl_family_rcv_msg_attrs_free(attrs); |