The attached two patches fix an issue with running BPF sockmap on TCP
sockets where applications error out due to sender doing a send for
each scatter gather element in the msg. The other 6.x stable and
longterm kernels have this fix so we don't see it there and the issue
was introduced in 6.1 by converting to the read_skb() interface. The
5.15 stable kernels use the read_sock() interface which doesn't have
this issue.
We missed adding the fixes tag to the original series because the work
was a code improvement and wasn't originally identified as a bugfix.
The first patch applies cleanly, the second patch does not because
it touches smc, espintcp, and siw which do not apply because that
code does not use sendmsg() yet on 6.1. I remove those chunks of the
patch because they don't apply here.
I added a Fixes tag to the patches to point at the patch introducing
the issue. Originally I sent something similar to this as a single
patch where I incorrectly merged the two patches. Greg asked me to
do this as two patches. Thanks.
David Howells (2):
tcp_bpf: Inline do_tcp_sendpages as it's now a wrapper around
tcp_sendmsg
tcp_bpf, smc, tls, espintcp, siw: Reduce MSG_SENDPAGE_NOTLAST usage
net/ipv4/tcp_bpf.c | 21 +++++++++++++--------
1 file changed, 13 insertions(+), 8 deletions(-)
--
2.33.0
