LKML Archive on lore.kernel.org
help / color / mirror / Atom feed
* Suspicious pattern for use of function xt_register_template()
@ 2021-08-23 17:01 Lukas Bulwahn
  2021-08-23 19:10 ` Florian Westphal
  0 siblings, 1 reply; 3+ messages in thread
From: Lukas Bulwahn @ 2021-08-23 17:01 UTC (permalink / raw)
  To: Pablo Neira Ayuso, Jozsef Kadlecsik, Florian Westphal,
	netfilter-devel, Linux Kernel Mailing List, Netdev, coreteam,
	clang-built-linux

Dear Florian, dear netfilter maintainers,

Commit fdacd57c79b ("netfilter: x_tables: never register tables by
default") on linux-next
introduces the function xt_register_template() and in all cases but
one, the calls to that function are followed by:

    if (ret < 0)
        return ret;

All these checks were also added with the commit above.

In the one case, for iptable_mangle_init() in
./net/ipv4/netfilter/iptable_mangle.c, this pattern was not followed.
This makes this ret assignment in this function a Dead Store and
hence, clang-analyzer warns about that.

Are we missing here an early return for a negative return value as
well, or is this case for iptable_mangle_init() in
./net/ipv4/netfilter/iptable_mangle.c special?


Best regards,

Lukas

^ permalink raw reply	[flat|nested] 3+ messages in thread

end of thread, other threads:[~2021-08-23 20:28 UTC | newest]

Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-08-23 17:01 Suspicious pattern for use of function xt_register_template() Lukas Bulwahn
2021-08-23 19:10 ` Florian Westphal
2021-08-23 20:28   ` Lukas Bulwahn

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).