[Bug 262829] epair: New panic when destroying epair interface of vnet jail

From: <bugzilla-noreply_at_freebsd.org>
Date: Fri, 27 May 2022 16:37:49 UTC

--- Comment #9 from commit-hook@FreeBSD.org ---
A commit in branch stable/13 references this bug:


commit 4dfd3ffc4488e5e2662cdc40deec17d82432da0b
Author:     Kristof Provost <kp@FreeBSD.org>
AuthorDate: 2022-03-27 18:23:25 +0000
Commit:     Kristof Provost <kp@FreeBSD.org>
CommitDate: 2022-05-27 16:25:10 +0000

    if: avoid interface destroy race

    When we destroy an interface while the jail containing it is being
    destroyed we risk seeing a race between if_vmove() and the destruction
    code, which results in us trying to move a destroyed interface.

    Protect against this by using the ifnet_detach_sxlock to also covert
    if_vmove() (and not just detach).

    PR:             262829
    MFC after:      3 weeks
    Differential Revision:  https://reviews.freebsd.org/D34704

    (cherry picked from commit 868bf82153e8ff22f09a8860c872149e0fb6bdef)

 sys/net/if.c                   | 22 ++++++++++++++++++++--
 tests/sys/net/if_clone_test.sh | 29 +++++++++++++++++++++++++++++
 2 files changed, 49 insertions(+), 2 deletions(-)

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