From: "Philippe Mathieu-Daudé" <philmd@redhat.com>
To: qemu-devel@nongnu.org
Cc: "Dmitry Fleytman" <dmitry.fleytman@gmail.com>,
"Jason Wang" <jasowang@redhat.com>,
"Paolo Bonzini" <pbonzini@redhat.com>,
"Miroslav Rezanina" <mrezanin@redhat.com>,
"Philippe Mathieu-Daudé" <philmd@redhat.com>,
"Stefano Garzarella" <sgarzare@redhat.com>
Subject: [PATCH v5 7/7] net/eth: Add an assert() and invert if() statement to simplify code
Date: Wed, 10 Mar 2021 17:01:35 +0100 [thread overview]
Message-ID: <20210310160135.1148272-8-philmd@redhat.com> (raw)
In-Reply-To: <20210310160135.1148272-1-philmd@redhat.com>
To simplify the function body, invert the if() statement, returning
earlier.
Since we already checked there is enough data in the iovec buffer,
simply add an assert() call to consume the bytes_read variable.
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
---
net/eth.c | 14 ++++++--------
1 file changed, 6 insertions(+), 8 deletions(-)
diff --git a/net/eth.c b/net/eth.c
index b150d73c13a..c0a5ca12be2 100644
--- a/net/eth.c
+++ b/net/eth.c
@@ -416,16 +416,14 @@ _eth_get_rss_ex_dst_addr(const struct iovec *pkt, int pkt_frags,
bytes_read = iov_to_buf(pkt, pkt_frags, ext_hdr_offset,
&rt_hdr, sizeof(rt_hdr));
assert(bytes_read == sizeof(rt_hdr));
-
- if ((rt_hdr.rtype == 2) && (rt_hdr.segleft == 1)) {
- bytes_read = iov_to_buf(pkt, pkt_frags,
- ext_hdr_offset + sizeof(*ext_hdr),
- dst_addr, sizeof(*dst_addr));
-
- return bytes_read == sizeof(*dst_addr);
+ if ((rt_hdr.rtype != 2) || (rt_hdr.segleft != 1)) {
+ return false;
}
+ bytes_read = iov_to_buf(pkt, pkt_frags, ext_hdr_offset + sizeof(rt_hdr),
+ dst_addr, sizeof(*dst_addr));
+ assert(bytes_read == sizeof(*dst_addr));
- return false;
+ return true;
}
static bool
--
2.26.2
next prev parent reply other threads:[~2021-03-10 16:23 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-10 16:01 [PATCH v5 0/7] net/eth: Fix stack-buffer-overflow in _eth_get_rss_ex_dst_addr() Philippe Mathieu-Daudé
2021-03-10 16:01 ` [PATCH v5 1/7] net/eth: Simplify _eth_get_rss_ex_dst_addr() Philippe Mathieu-Daudé
2021-03-10 16:01 ` [PATCH v5 2/7] net/eth: Better describe _eth_get_rss_ex_dst_addr's offset argument Philippe Mathieu-Daudé
2021-03-10 16:01 ` [PATCH v5 3/7] net/eth: Make ip6_ext_hdr *ext_hdr pointer to const Philippe Mathieu-Daudé
2021-03-10 16:46 ` Stefano Garzarella
2021-03-10 17:25 ` Philippe Mathieu-Daudé
2021-03-10 16:01 ` [PATCH v5 4/7] net/eth: Check the size earlier Philippe Mathieu-Daudé
2021-03-10 16:47 ` Stefano Garzarella
2021-03-10 16:01 ` [PATCH v5 5/7] net/eth: Check iovec has enough data earlier Philippe Mathieu-Daudé
2021-03-10 16:53 ` Stefano Garzarella
2021-03-10 17:57 ` Philippe Mathieu-Daudé
2021-03-10 18:26 ` Philippe Mathieu-Daudé
2021-03-11 8:08 ` Stefano Garzarella
2021-03-10 16:01 ` [PATCH v5 6/7] net/eth: Read ip6_ext_hdr_routing buffer before accessing it Philippe Mathieu-Daudé
2021-03-10 16:55 ` Stefano Garzarella
2021-03-10 16:01 ` Philippe Mathieu-Daudé [this message]
2021-03-10 17:00 ` [PATCH v5 7/7] net/eth: Add an assert() and invert if() statement to simplify code Stefano Garzarella
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