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selftests/net: fix typo in tcp_mmap

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kernel test robot reported the following warning:

All warnings (new ones prefixed by >>):

   tcp_mmap.c: In function 'child_thread':
>> tcp_mmap.c:211:61: warning: 'lu' may be used uninitialized in this function [-Wmaybe-uninitialized]
     211 |                         zc.length = min(chunk_size, FILE_SZ - lu);

We want to read FILE_SZ bytes, so the correct expression
should be (FILE_SZ - total)

Fixes: 5c5945dc69 ("selftests/net: Add SHA256 computation over data sent in tcp_mmap")
Reported-by: kernel test robot <lkp@intel.com>
Link: https://lore.kernel.org/oe-kbuild-all/202304042104.UFIuevBp-lkp@intel.com/
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Xiaoyan Li <lixiaoyan@google.com>
Cc: Kuniyuki Iwashima <kuniyu@amazon.com>
Link: https://lore.kernel.org/r/20230405071556.1019623-1-edumazet@google.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
This commit is contained in:
Eric Dumazet 2023-04-05 07:15:56 +00:00 committed by Paolo Abeni
parent 0f72997036
commit 905a9eb5f6
1 changed files with 1 additions and 1 deletions
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2
tools/testing/selftests/net/tcp_mmap.c
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@ -208,7 +208,7 @@ void *child_thread(void *arg)
memset(&zc, 0, sizeof(zc));
zc.address = (__u64)((unsigned long)addr);
zc.length = min(chunk_size, FILE_SZ - lu);
zc.length = min(chunk_size, FILE_SZ - total);
res = getsockopt(fd, IPPROTO_TCP, TCP_ZEROCOPY_RECEIVE,
&zc, &zc_len);