42 lines
1.3 KiB
Diff
42 lines
1.3 KiB
Diff
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From b34c2340657cfe467a0c2cde4933422bddf4348b Mon Sep 17 00:00:00 2001
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From: Alexey Tikhonov <atikhono@redhat.com>
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Date: Wed, 20 Dec 2023 18:28:34 +0100
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Subject: [PATCH] unix.7: SO_PEERCRED: Mention listen(2)
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In case of connected AF_UNIX stream sockets, server-side credentials are
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set at the time of a call to listen(2), not when client-side calls
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connect(2).
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This is important if server side process changes UID/GID after listen(2)
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and before connect(2).
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Reproducer is available in [1].
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Behavior was confirmed in the email thread [2].
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Link: [1] <https://bugzilla.redhat.com/show_bug.cgi?id=2247682>
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Link: [2] <https://lore.kernel.org/linux-man/CABPeg3a9L0142gmdZZ+0hoD+Q3Vgv0BQ21g8Z+gf2kznWouErA@mail.gmail.com/>
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Signed-off-by: Alexey Tikhonov <atikhono@redhat.com>
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Reviewed-by: Kuniyuki Iwashima <kuniyu@amazon.com>
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Signed-off-by: Alejandro Colomar <alx@kernel.org>
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---
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man7/unix.7 | 3 ++-
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1 file changed, 2 insertions(+), 1 deletion(-)
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diff --git a/man7/unix.7 b/man7/unix.7
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index e9edad467..71cdfc758 100644
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--- a/man7/unix.7
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+++ b/man7/unix.7
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@@ -331,7 +331,8 @@ This read-only socket option returns the
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credentials of the peer process connected to this socket.
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The returned credentials are those that were in effect at the time
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of the call to
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-.BR connect (2)
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+.BR connect (2),
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+.BR listen (2),
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or
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.BR socketpair (2).
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.IP
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--
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2.41.0
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