Date: Tue, 15 Dec 2020 15:34:33 +0000 From: bugzilla-noreply@freebsd.org To: testing@FreeBSD.org Subject: [Bug 244703] sys.netpfil.pf.nat.exhaust panics kernel Message-ID: <bug-244703-32464-CLnwAGbqHK@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-244703-32464@https.bugs.freebsd.org/bugzilla/> References: <bug-244703-32464@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=244703 --- Comment #11 from commit-hook@FreeBSD.org --- A commit references this bug: Author: kp Date: Tue Dec 15 15:33:29 UTC 2020 New revision: 368663 URL: https://svnweb.freebsd.org/changeset/base/368663 Log: MFC r368237: if: Fix panic when destroying vnet and epair simultaneously When destroying a vnet and an epair (with one end in the vnet) we often panicked. This was the result of the destruction of the epair, which destroys both ends simultaneously, happening while vnet_if_return() was moving the struct ifnet to its home vnet. This can result in a freed ifnet being re-added to the home vnet V_ifnet list. That in turn panics the next time the ifnet is used. Prevent this race by ensuring that vnet_if_return() cannot run at the same time as if_detach() or epair_clone_destroy(). PR: 238870, 234985, 244703, 250870 Sponsored by: Modirum MDPay Changes: _U stable/12/ stable/12/sys/net/if.c -- You are receiving this mail because: You are the assignee for the bug.
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