From nobody Sat Apr 18 12:06:44 2026 X-Original-To: freebsd-current@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 4fyVq15j2nz6ZcCx for ; Sat, 18 Apr 2026 12:06:53 +0000 (UTC) (envelope-from david@catwhisker.org) Received: from mx.catwhisker.org (mx.catwhisker.org [107.204.234.170]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 4fyVq10nBhz4KFn for ; Sat, 18 Apr 2026 12:06:52 +0000 (UTC) (envelope-from david@catwhisker.org) Authentication-Results: mx1.freebsd.org; none Received: from albert.catwhisker.org (localhost [127.0.0.1]) by albert.catwhisker.org (8.18.1/8.18.1) with ESMTP id 63IC6i2R098041; Sat, 18 Apr 2026 12:06:44 GMT (envelope-from david@albert.catwhisker.org) Received: (from david@localhost) by albert.catwhisker.org (8.18.1/8.18.1/Submit) id 63IC6iMm098040; Sat, 18 Apr 2026 05:06:44 -0700 (PDT) (envelope-from david) Date: Sat, 18 Apr 2026 05:06:44 -0700 From: David Wolfskill To: Ricardo Branco Cc: freebsd-current@freebsd.org Subject: Re: panic: assertion failed in iflib_txq_drain() Message-ID: Reply-To: current@freebsd.org Mail-Followup-To: current@freebsd.org, Ricardo Branco , freebsd-current@freebsd.org References: <9d640ae4-7133-4d4f-917f-d715ab71ee7b@suse.de> List-Id: Discussions about the use of FreeBSD-current List-Archive: https://lists.freebsd.org/archives/freebsd-current List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-current@FreeBSD.org MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="XxNZQSq+4VVJLDiU" Content-Disposition: inline In-Reply-To: <9d640ae4-7133-4d4f-917f-d715ab71ee7b@suse.de> X-Rspamd-Pre-Result: action=no action; module=replies; Message is reply to one we originated X-Spamd-Result: default: False [-4.00 / 15.00]; REPLY(-4.00)[]; ASN(0.00)[asn:7018, ipnet:107.192.0.0/12, country:US] X-Rspamd-Queue-Id: 4fyVq10nBhz4KFn X-Spamd-Bar: ---- --XxNZQSq+4VVJLDiU Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Sat, Apr 18, 2026 at 11:47:14AM +0200, Ricardo Branco wrote: > I'm getting this on FreeBSD-kernel-generic 16.snap20260416224424 >=20 > This is happening as soon as I try to ssh to a GMKTec NucBox G3 Plus with > Ethernet Controller I226-V. >=20 > It also happens when trying to do any TCP connection.=A0 Attached gzipped > /var/crash/core.txt >=20 > panic: Assertion mp !=3D NULL && *mp !=3D NULL failed at > /home/pkgbuild/worktrees/main/sys/net/iflib.c:3922 cpuid=3D 3 time 177650= 0574 > KDB: stack backtrace: > db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame > 0xfffff81078b7450 vpanic at vpanic+0x136/frame 0xfffffe01078b7580 > panic > at panic+0x43/frame 0xfffffe01078b75e0 > iflib_txq_drain at iflib_txq_drain+0x429/frame 0xfffffe81078b7660 > drain_ring_lockless() at drain_ring_lockless+0x8a/frame 0xfffffe01078b76b0 > ifmp_ring_enqueue() at ifmp_ring_enqueue+0x332/frame 0xfffffe81078b7700 > .... So... one of the machines on which I track head got this, as well -- my (mostly-)headless build machine. (2 laptops, updated in sync with the build machine, did not panic. One of those also uses a wired NIC.) In my case, the failure occurred after updating from=20 FreeBSD 16.0-CURRENT #547 main-n285122-3b373d484046: Fri Apr 17 13:15:23 UT= C 2026 root@freebeast.catwhisker.org:/common/S4/obj/usr/src/amd64.amd64= /sys/GENERIC amd64 1600015 1600015 to main-n285179-7e9d974bc023. (As noted, 2 other machines (so far) updated to main-n285179-7e9d974bc023 without issue.) For now, I will reboot the machine to stable/15 (so it can build packages for tomorrow's weekly update), but once that's done, I'm happy to poke at it a bit or try out a patch or three, given suitable clues. The panic appears "quite reproducible." :-} Peace, david --=20 David H. Wolfskill david@catwhisker.org See https://www.catwhisker.org/~david/publickey.gpg for my public key. --XxNZQSq+4VVJLDiU Content-Type: application/pgp-signature; name=signature.asc -----BEGIN PGP SIGNATURE----- iNUEARYKAH0WIQRCec5RsK7Enudh3yGB9MJ9AwUELQUCaeNz1F8UgAAAAAAuAChp c3N1ZXItZnByQG5vdGF0aW9ucy5vcGVucGdwLmZpZnRoaG9yc2VtYW4ubmV0NDI3 OUNFNTFCMEFFQzQ5RUU3NjFERjIxODFGNEMyN0QwMzA1MDQyRAAKCRCB9MJ9AwUE LXJFAP0SslBzqfWioUcpLzTxoSTaZAHxY1eqLFRkT+Rg+a6+bwD/QVvVvs0xAtRD bDu/T2eHn7rSrVNTarg4mH75+fFNsA4= =3zhz -----END PGP SIGNATURE----- --XxNZQSq+4VVJLDiU--