[go] net: treat EPERM/EACCES in IPv6 probe as supported

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Gopher Robot (Gerrit)

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Mar 3, 2026, 7:23:43 PM (2 days ago) Mar 3

to Ravi Sastry Kadali, goph...@pubsubhelper.golang.org, golang-...@googlegroups.com, Go LUCI, Damien Neil, Nicholas Husin, Nicholas Husin, Dmitri Shuralyov, Michael Pratt, Ian Lance Taylor, golang-co...@googlegroups.com

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8 is the latest approved patch-set.
No files were changed between the latest approved patch-set and the submitted one.

Change information

Commit message:

net: treat EPERM/EACCES in IPv6 probe as supported

When a BPF/seccomp filter denies the bind in the IPv6 capability
probe with EPERM or EACCES, the probe incorrectly reports IPv6 as
unsupported even though socket creation and setsockopt succeeded.
This causes Listen on [::] to silently fall back to IPv4-only.

Treat EPERM/EACCES from the probe bind as "supported" since the
successful socket and setsockopt already confirm kernel capability.

Fixes #77430

Change-Id: Ie1164a3e835521dc441387af1c485a3d15e2e2d9

Reviewed-on: https://go-review.googlesource.com/c/go/+/743080

LUCI-TryBot-Result: Go LUCI <golang...@luci-project-accounts.iam.gserviceaccount.com>

Auto-Submit: Damien Neil <dn...@google.com>

Reviewed-by: Damien Neil <dn...@google.com>

Reviewed-by: Ravi Sastry Kadali <ravis...@gmail.com>

Reviewed-by: Nicholas Husin <n...@golang.org>

Reviewed-by: Nicholas Husin <hu...@google.com>

Files:

M src/net/ipsock_posix.go
M src/net/ipsock_test.go

Change size: S

Delta: 2 files changed, 28 insertions(+), 1 deletion(-)

Branch: refs/heads/master

Submit Requirements:

Code-Review: +1 by Ravi Sastry Kadali, +2 by Nicholas Husin, +1 by Damien Neil, +1 by Nicholas Husin
TryBots-Pass: LUCI-TryBot-Result+1 by Go LUCI

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