Date: Mon, 10 Aug 2020 17:53:50 +0000 From: bugzilla-noreply@freebsd.org To: net@FreeBSD.org Subject: [Bug 247647] if_vmx(4): Page fault when opening netmap port (IFLIB/DMA) Message-ID: <bug-247647-7501-Jj3kOWCctA@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-247647-7501@https.bugs.freebsd.org/bugzilla/> References: <bug-247647-7501@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D247647 --- Comment #26 from commit-hook@FreeBSD.org --- A commit references this bug: Author: vmaffione Date: Mon Aug 10 17:53:10 UTC 2020 New revision: 364085 URL: https://svnweb.freebsd.org/changeset/base/364085 Log: MFC r363378 iflib: initialize netmap with the correct number of descriptors In case the network device has a RX or TX control queue, the correct number of TX/RX descriptors is contained in the second entry of the isc_ntxd (or isc_nrxd) array, rather than in the first entry. This case is correctly handled by iflib_device_register() and iflib_pseudo_register(), but not by iflib_netmap_attach(). If the first entry is larger than the second, this can result in a panic. This change fixes the bug by introducing two helper functions that also lead to some code simplification. PR: 247647 Differential Revision: https://reviews.freebsd.org/D25541 Changes: _U stable/12/ stable/12/sys/net/iflib.c --=20 You are receiving this mail because: You are on the CC list for the bug.=
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