Vincent Whitchurch 80d709875d af_unix: fix regression in read after shutdown ... [ Upstream commit f9390b249c ] On kernels before v5.15, calling read() on a unix socket after shutdown(SHUT_RD) or shutdown(SHUT_RDWR) would return the data previously written or EOF. But now, while read() after shutdown(SHUT_RD) still behaves the same way, read() after shutdown(SHUT_RDWR) always fails with -EINVAL. This behaviour change was apparently inadvertently introduced as part of a bug fix for a different regression caused by the commit adding sockmap support to af_unix, commit 94531cfcbe ("af_unix: Add unix_stream_proto for sockmap"). Those commits, for unclear reasons, started setting the socket state to TCP_CLOSE on shutdown(SHUT_RDWR), while this state change had previously only been done in unix_release_sock(). Restore the original behaviour. The sockmap tests in tests/selftests/bpf continue to pass after this patch. Fixes: d0c6416bd7 ("unix: Fix an issue in unix_shutdown causing the other end read/write failures") Link: https://lore.kernel.org/lkml/20211111140000.GA10779@axis.com/ Signed-off-by: Vincent Whitchurch <vincent.whitchurch@axis.com> Tested-by: Casey Schaufler <casey@schaufler-ca.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Sasha Levin <sashal@kernel.org>		2021-12-01 09:04:49 +01:00
..
Kconfig	af_unix: Add OOB support	2021-08-04 09:55:52 +01:00
Makefile	af_unix: Implement ->psock_update_sk_prot()	2021-07-15 18:17:50 -07:00
af_unix.c	af_unix: fix regression in read after shutdown	2021-12-01 09:04:49 +01:00
diag.c	net: Use nlmsg_unicast() instead of netlink_unicast()	2021-07-13 09:28:29 -07:00
garbage.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 62	2019-05-24 17:36:46 +02:00
scm.c	io_uring: move io_uring_get_socket() into io_uring.h	2020-09-30 20:32:33 -06:00
scm.h	net: split out functions related to registering inflight socket files	2019-02-28 08:24:23 -07:00
sysctl_net_unix.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152	2019-05-30 11:26:32 -07:00
unix_bpf.c	net: Implement ->sock_is_readable() for UDP and AF_UNIX	2021-10-26 12:29:33 -07:00