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[73.19.52.228]) by smtp.gmail.com with ESMTPSA id g88-v6sm12740996pfd.181.2018.10.14.21.45.52 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sun, 14 Oct 2018 21:45:53 -0700 (PDT) From: "Enji Cooper (yaneurabeya)" Message-Id: <1B58488D-8615-40E8-9115-E26496A6DBCE@gmail.com> Content-Type: multipart/signed; boundary="Apple-Mail=_464C820D-3E11-4923-B5EB-9C6B087ED5AD"; protocol="application/pgp-signature"; micalg=pgp-sha256 Mime-Version: 1.0 (Mac OS X Mail 11.5 \(3445.9.1\)) Subject: Re: Relatively deterministic panic with sendfile(2) when running tests in the sxlock code Date: Sun, 14 Oct 2018 21:45:52 -0700 In-Reply-To: <20181015022518.GV1044@FreeBSD.org> Cc: FreeBSD Current , freebsd-net , Jonathan Looney To: Gleb Smirnoff References: <20181015022518.GV1044@FreeBSD.org> X-Mailer: Apple Mail (2.3445.9.1) X-Content-Filtered-By: Mailman/MimeDel 2.1.27 X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.27 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 15 Oct 2018 04:45:56 -0000 --Apple-Mail=_464C820D-3E11-4923-B5EB-9C6B087ED5AD Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=utf-8 > On Oct 14, 2018, at 7:25 PM, Gleb Smirnoff = wrote: >=20 > Hi Enji, >=20 > On Sun, Oct 14, 2018 at 06:51:42PM -0700, Enji Cooper (yaneurabeya) = wrote: > E> Hi, > E> I=E2=80=99m seeing a semi-deterministic panic on 12.0-ALPHA9 = related to sendfile(2) when running sendfile_test on the host: = https://pastebin.com/raw/6Y7xg0ki; it looks like it=E2=80=99s crashing = in the sxlock code when calling sblock on a sockbuf. Are there any = commands in gdb you would like me to run to display lock state? > E> Repro: > E> > E> mkdir /path/to/git/checkout > E> cd /path/to/git/checkout > E> git clone https://github.com/ngie-eign/freebsd/tree/sendfile_tests = . > E> git checkout sendfile_tests > E> (cd lib/libc/tests/sys/; make obj; make; sudo make install) > E> kyua test -k /usr/tests/lib/libc/sys/Kyuafile sendfile_test >=20 > I'd like to reproduce it myself, but looks like URL is > wrong: >=20 > glebius@erla:/usr/src:|>git clone = https://github.com/ngie-eign/freebsd/tree/sendfile_tests > =D0=9A=D0=BB=D0=BE=D0=BD=D0=B8=D1=80=D0=BE=D0=B2=D0=B0=D0=BD=D0=B8=D0=B5= =D0=B2 =C2=ABsendfile_tests=C2=BB=E2=80=A6 > fatal: repository = 'https://github.com/ngie-eign/freebsd/tree/sendfile_tests/' not found Mea culpa. It should be: $ git clone https://github.com/ngie-eign/freebsd.git = . Another note is that I=E2=80=99m running GENERIC-NODEBUG, not = GENERIC-DEBUG. I suspect that it=E2=80=99s crashing on :hdtr_negative_bad_pointers or : = s_negative_not_descriptor, because the other items don=E2=80=99t seem = terribly plausible. The test case (source) can be found here: = https://github.com/ngie-eign/freebsd/blob/95b96470a3a0270c36c4e7fb5eedc150= fe124fac/lib/libc/tests/sys/sendfile_test.c Thanks! -Enji --Apple-Mail=_464C820D-3E11-4923-B5EB-9C6B087ED5AD Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename=signature.asc Content-Type: application/pgp-signature; name=signature.asc Content-Description: Message signed with OpenPGP -----BEGIN PGP SIGNATURE----- iQIzBAEBCAAdFiEE5bk3FaGcY5rvqmb79YOpJmkwhhUFAlvEG4AACgkQ9YOpJmkw hhU9wQ/9EftWJX01ndnwNWvT3KGv7chZffjIqhtvjLYTzD3G844MdrQx1u9GwzsH gZWH5msWw1ebXNDLTDtffN5B7SLDNpVGdYeHMJEnE5YKQGvPRj3YcIPsMT4k9LV2 3mxWoJ82TLkF6NrOga3LtyrwODVGybHoPI7wlfvQt7Pz9Hgb8dgpkM9+87+LDSRB rjaCfn+Sb2tW02hnknHWiT8JFAN/pY+wEHcIrXobay/6IO3IdMTu/g+gM3RQbb3N Ge0pNdckyhu9wJheDeWpksN+xKZn06y9tS0UQx0G5oo7ADrgJW9q3pDWVvKGyWk5 ZwBQyfnvwHZU3l7NcMsBKrN7eoD2mnGjD5Lz1PJlEGwveWWrfqXuhbDnHMoC/+m8 rh7+1P1srd8nRJgry0eVWJwawJe38iWbtCVY+IyWJEAr+3gcNUraTrIR9YaJRRvL BomNs8aRoTTvhVUAmYJp9plzYg8psv095OSvghncKouYayuWqJ3TesdxI+yiGYAC Q6EhmLodlfmtu+P3lHDr96p7KDqfGoIL7hnaqkJc53ogxO5PYbAgaVGLoOD6thcv vX51By3kSEzPsVenMAZ1Srv09eVV0t2n8k1iF75XO/zu7AV0clppBqEkbyCeQ9Wu 0fFSwjfNZWD9VrqZJh2Rgzni4c+T8ySk/YtV/Yv0Z2G5XPE298E= =RZtc -----END PGP SIGNATURE----- --Apple-Mail=_464C820D-3E11-4923-B5EB-9C6B087ED5AD--