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net: Fix from address in memcpy_to_iter_csum()

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While inlining csum_and_memcpy() into memcpy_to_iter_csum(), the from
address passed to csum_partial_copy_nocheck() was accidentally changed.
This causes a regression in applications using UDP, as for example
OpenAFS, causing loss of datagrams.

Fixes: dc32bff195 ("iov_iter, net: Fold in csum_and_memcpy()")
Cc: David Howells <dhowells@redhat.com>
Cc: stable@vger.kernel.org
Cc: regressions@lists.linux.dev
Signed-off-by: Michael Lass <bevan@bi-co.net>
Reviewed-by: Jeffrey Altman <jaltman@auristor.com>
Acked-by: David Howells <dhowells@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Michael Lass 2024-01-31 16:52:20 +01:00 committed by David S. Miller
parent 46eba193d0
commit fe92f874f0
1 changed files with 1 additions and 1 deletions
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2
net/core/datagram.c
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@ -751,7 +751,7 @@ size_t memcpy_to_iter_csum(void *iter_to, size_t progress,
size_t len, void *from, void *priv2)
{
__wsum *csum = priv2;
__wsum next = csum_partial_copy_nocheck(from, iter_to, len);
__wsum next = csum_partial_copy_nocheck(from + progress, iter_to, len);
*csum = csum_block_add(*csum, next, progress);
return 0;