Date: Sun, 08 Sep 2013 16:27:24 -0700 From: Sean Bruno <sean_bruno@yahoo.com> To: Davide Italiano <davide.italiano@gmail.com> Cc: "freebsd-current@FreeBSD.org" <freebsd-current@freebsd.org> Subject: Re: Interesting panic from the Yahoo builder (10-current) Message-ID: <1378682844.60317.0.camel@localhost> In-Reply-To: <CACYV=-EUgCZ5UZ8MURML=AOY9J2GKoF43wegXJiMcssoRJO7Kg@mail.gmail.com> References: <1378483253.1598.3.camel@localhost> <CACYV=-EUgCZ5UZ8MURML=AOY9J2GKoF43wegXJiMcssoRJO7Kg@mail.gmail.com>
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--=-sboHpiMVd+ONQKPvTdPj Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable On Sat, 2013-09-07 at 17:05 +0200, Davide Italiano wrote:=20 > On Fri, Sep 6, 2013 at 6:00 PM, Sean Bruno <sean_bruno@yahoo.com> wrote: > > Our "yBSD" builder needs to mount a disk image temporarily that has a > > dos partition (for openstack-ish things) to put configs into it. It > > seems that under high stress, we can squeeze a panic out of it in > > namei(). > > > > Sean > > > > > > Unread portion of the kernel message buffer: > > panic: namei: nameiop contaminated with flags > > cpuid =3D 8 > > KDB: stack backtrace: > > db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe048= d8e53b0 > > kdb_backtrace() at kdb_backtrace+0x39/frame 0xfffffe048d8e5460 > > vpanic() at vpanic+0x126/frame 0xfffffe048d8e54a0 > > kassert_panic() at kassert_panic+0x136/frame 0xfffffe048d8e5510 > > namei() at namei+0x2c8/frame 0xfffffe048d8e5600 > > msdosfs_mount() at msdosfs_mount+0x556/frame 0xfffffe048d8e57c0 > > vfs_donmount() at vfs_donmount+0xc35/frame 0xfffffe048d8e5aa0 > > sys_nmount() at sys_nmount+0x72/frame 0xfffffe048d8e5ae0 > > amd64_syscall() at amd64_syscall+0x223/frame 0xfffffe048d8e5bf0 > > Xfast_syscall() at Xfast_syscall+0xfb/frame 0xfffffe048d8e5bf0 > > --- syscall (378, FreeBSD ELF64, sys_nmount), rip =3D 0x8000a8b68a, rsp= =3D 0x7fffffffd508, rbp =3D 0x7fffffffdb30 --- > > Uptime: 34m55s > > Dumping 1140 out of 16350 MB:..2%..12%..22%..31%..41%..51%..61%..71%..8= 2%..92% > > > > Reading symbols from /boot/modules/msdosfs.ko...done. > > Loaded symbols for /boot/modules/msdosfs.ko > > #0 doadump (textdump=3D1) at pcpu.h:227 > > 227 pcpu.h: No such file or directory. > > in pcpu.h > > (kgdb) Hangup detected on fd 0 > > error detected on stdin >=20 > Can you please print the value of cnp->cn_nameiop (or, even better, > the whole struct) before the panic? >=20 > Thanks, >=20 Hrm ... tried to reproduce after recompiling the kernel (turning off KDB_UNATTENDED) and its not happening now. =20 I'll keep an eye out for it. Sean --=-sboHpiMVd+ONQKPvTdPj Content-Type: application/pgp-signature; name="signature.asc" Content-Description: This is a digitally signed message part -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.14 (FreeBSD) iQEcBAABAgAGBQJSLQfRAAoJEBkJRdwI6BaHWDYH/0p6dlbM5H43Tkdbzg/75ySi RDppiHhhdV7FV+5nT517eIzfLk4voUeeyXTDx9auhCSFIjIEc86AN9/bdl+5265k bAPdVwHRG7atSnk8fECKyYF/a+qtONVJpxKyhMmf9WcHo7joQgZG6gvM0KMry15e Fqdir9DFSZ3pcDry7GwEhFaCDfbcySuof0ljULMJVP7dXMqFrVowgGDus1a2XcyI JkUb02uS+34pVApA3yiDG0P+7L3B1/8jf1maIUKIb3+l0wp5KJl5mJK9XodnKlSQ rN77whMmZwtpZcnRz/9sZ1A3hdTIn2F4YkswZR8Vag4THsb1CxhEDqZJTLhrcKU= =LtNe -----END PGP SIGNATURE----- --=-sboHpiMVd+ONQKPvTdPj--
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