>From c835c1c7c7047590263cf6c6d516092b165e013d Mon Sep 17 00:00:00 2001 From: Alexey Tikhonov <atikhono@xxxxxxxxxx> Date: Wed, 20 Dec 2023 18:28:34 +0100 Subject: [PATCH] unix.7: SO_PEERCRED: Mention listen(2) In case of connected AF_UNIX stream sockets, server-side credentials are set at the time of a call to listen(2), not when client-side calls connect(2). This is important if server side process changes UID/GID after listen(2) and before connect(2). Reproducer is available in https://bugzilla.redhat.com/show_bug.cgi?id=2247682 Behavior was confirmed in the email thread https://lore.kernel.org/linux-man/CABPeg3a9L0142gmdZZ+0hoD+Q3Vgv0BQ21g8Z+gf2kznWouErA@xxxxxxxxxxxxxx/ Signed-off-by: Alexey Tikhonov <atikhono@xxxxxxxxxx> --- man7/unix.7 | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/man7/unix.7 b/man7/unix.7 index e9edad467..71cdfc758 100644 --- a/man7/unix.7 +++ b/man7/unix.7 @@ -331,7 +331,8 @@ This read-only socket option returns the credentials of the peer process connected to this socket. The returned credentials are those that were in effect at the time of the call to -.BR connect (2) +.BR connect (2), +.BR listen (2), or .BR socketpair (2). .IP -- 2.41.0
From c835c1c7c7047590263cf6c6d516092b165e013d Mon Sep 17 00:00:00 2001 From: Alexey Tikhonov <atikhono@xxxxxxxxxx> Date: Wed, 20 Dec 2023 18:28:34 +0100 Subject: [PATCH] unix.7: SO_PEERCRED: Mention listen(2) In case of connected AF_UNIX stream sockets, server-side credentials are set at the time of a call to listen(2), not when client-side calls connect(2). This is important if server side process changes UID/GID after listen(2) and before connect(2). Reproducer is available in https://bugzilla.redhat.com/show_bug.cgi?id=2247682 Behavior was confirmed in the email thread https://lore.kernel.org/linux-man/CABPeg3a9L0142gmdZZ+0hoD+Q3Vgv0BQ21g8Z+gf2kznWouErA@xxxxxxxxxxxxxx/ Signed-off-by: Alexey Tikhonov <atikhono@xxxxxxxxxx> --- man7/unix.7 | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/man7/unix.7 b/man7/unix.7 index e9edad467..71cdfc758 100644 --- a/man7/unix.7 +++ b/man7/unix.7 @@ -331,7 +331,8 @@ This read-only socket option returns the credentials of the peer process connected to this socket. The returned credentials are those that were in effect at the time of the call to -.BR connect (2) +.BR connect (2), +.BR listen (2), or .BR socketpair (2). .IP -- 2.41.0
