Date: Wed, 2 Sep 2015 08:16:14 +0200 From: Baptiste Daroussin <bapt@FreeBSD.org> To: Konstantin Belousov <kib@FreeBSD.org> Cc: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: Re: svn commit: r287366 - head/sys/kern Message-ID: <20150902061614.GB61752@ivaldir.etoilebsd.net> In-Reply-To: <201509011405.t81E5U0g025928@repo.freebsd.org> References: <201509011405.t81E5U0g025928@repo.freebsd.org>
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--eAbsdosE1cNLO4uF Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Tue, Sep 01, 2015 at 02:05:30PM +0000, Konstantin Belousov wrote: > Author: kib > Date: Tue Sep 1 14:05:29 2015 > New Revision: 287366 > URL: https://svnweb.freebsd.org/changeset/base/287366 >=20 > Log: > Exit notification for EVFILT_PROC removes knote from the knlist. In > particular, this invalidates the knote kn_link linkage, making the > SLIST_FOREACH() loop accessing undefined values (e.g. trashed by > QUEUE_MACRO_DEBUG). If the knote is freed by other thread when kq > lock is released or when influx is cleared, e.g. by knote_scan() for > kqueue owning the knote, the iteration step would access freed memory. > =20 > Use SLIST_FOREACH_SAFE() to fix iteration. > =20 > Diagnosed by: avg > Tested by: avg, lstewart, pawel > Sponsored by: The FreeBSD Foundation > MFC after: 2 weeks >=20 Thank you! that makes my package builders stable again! Best regards, Bapt --eAbsdosE1cNLO4uF Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iEYEARECAAYFAlXmlC4ACgkQ8kTtMUmk6EwPYgCffTXrongm+5WcyqPlbDnbi0/F 50AAn3UFsEw08TLJKEXcg9hWwuur3Vzp =FFvj -----END PGP SIGNATURE----- --eAbsdosE1cNLO4uF--
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