diff options
| author | Hugh Dickins <hughd@google.com> | 2024-07-08 07:46:00 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-07-18 13:22:39 +0200 |
| commit | 3730fee0821c320ef407903630fec7ea2911a46b (patch) | |
| tree | 3a40b0602b8a297b6103198ae2fa162ae72c5aae /net | |
| parent | 5f323d579223be129903693dc7d806a0bc39b28d (diff) | |
net: fix rc7's __skb_datagram_iter()
[ Upstream commit f153831097b4435f963e385304cc0f1acba1c657 ]
X would not start in my old 32-bit partition (and the "n"-handling looks
just as wrong on 64-bit, but for whatever reason did not show up there):
"n" must be accumulated over all pages before it's added to "offset" and
compared with "copy", immediately after the skb_frag_foreach_page() loop.
Fixes: d2d30a376d9c ("net: allow skb_datagram_iter to be called from any context")
Signed-off-by: Hugh Dickins <hughd@google.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Link: https://patch.msgid.link/fef352e8-b89a-da51-f8ce-04bc39ee6481@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'net')
| -rw-r--r-- | net/core/datagram.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/net/core/datagram.c b/net/core/datagram.c index cb72923acc21..99abfafb0b43 100644 --- a/net/core/datagram.c +++ b/net/core/datagram.c @@ -442,11 +442,12 @@ static int __skb_datagram_iter(const struct sk_buff *skb, int offset, if (copy > len) copy = len; + n = 0; skb_frag_foreach_page(frag, skb_frag_off(frag) + offset - start, copy, p, p_off, p_len, copied) { vaddr = kmap_local_page(p); - n = INDIRECT_CALL_1(cb, simple_copy_to_iter, + n += INDIRECT_CALL_1(cb, simple_copy_to_iter, vaddr + p_off, p_len, data, to); kunmap_local(vaddr); } |