[Bug 254478] Panic when using ipfw and divert sockets

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Tue Apr 6 06:50:52 UTC 2021


https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=254478

--- Comment #6 from commit-hook at FreeBSD.org ---
A commit in branch stable/13 references this bug:

URL:
https://cgit.FreeBSD.org/src/commit/?id=6b8c65318e81a451b33ed57b84a5495284dcb20f

commit 6b8c65318e81a451b33ed57b84a5495284dcb20f
Author:     Andrey V. Elsukov <ae at FreeBSD.org>
AuthorDate: 2021-03-30 09:31:09 +0000
Commit:     Andrey V. Elsukov <ae at FreeBSD.org>
CommitDate: 2021-04-06 06:47:54 +0000

    ipdivert: check that PCB is still valid after taking INPCB_RLOCK.

    We are inspecting PCBs of divert sockets under NET_EPOCH section,
    but PCB could be already detached and we should check INP_FREED flag
    when we took INP_RLOCK.

    PR:             254478
    Differential Revision:  https://reviews.freebsd.org/D29420

    (cherry picked from commit c80a4b76ceacc5aab322e7ac1407eea8c90cb3b1)

 sys/netinet/ip_divert.c | 4 ++++
 1 file changed, 4 insertions(+)

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