Torfinn Ingolfsen
2015-May-26 18:00 UTC
FreeBSD 10.1-stable: repeatable panic when trying to copy files from an ext3 filesystem mounted read-only
Hello,
I get a repeatable panic when trying to cpy files from an ext3 filesystewm which
is mounted read-only. Listing files works ok.
Details:
root at kg-u35jc# uname -a
FreeBSD kg-u35jc.kg4.no 10.1-STABLE FreeBSD 10.1-STABLE #0 r283269: Fri May 22
09:14:57 CEST 2015
root at kg-u35jc.kg4.no:/usr/obj/usr/src/sys/GENERIC amd64
Steps to reproduce:
# kldload ext2fs
# mount -r -t ext2fs /dev/ada0s5 /mnt
# cp /mnt/whatever-file <somedir>
Results in a nice panic:
root at kg-u35jc# cat /var/crash/info.0
Dump header from device /dev/ada0s3b
Architecture: amd64
Architecture Version: 2
Dump Length: 1075154944B (1025 MB)
Blocksize: 512
Dumptime: Mon May 25 20:07:55 2015
Hostname: kg-u35jc.kg4.no
Magic: FreeBSD Kernel Dump
Version String: FreeBSD 10.1-STABLE #0 r283269: Fri May 22 09:14:57 CEST 2015
root at kg-u35jc.kg4.no:/usr/obj/usr/src/sys/GENERIC
Panic String: __lockmgr_args: recursing on non recursive lockmgr getblk @
(null):0
Dump Parity: 3531684913
Bounds: 0
Dump Status: good
which is easy to reproduce:
root at kg-u35jc# cat /var/crash/info.1
Dump header from device /dev/ada0s3b
Architecture: amd64
Architecture Version: 2
Dump Length: 478572544B (456 MB)
Blocksize: 512
Dumptime: Mon May 25 20:24:29 2015
Hostname: kg-u35jc.kg4.no
Magic: FreeBSD Kernel Dump
Version String: FreeBSD 10.1-STABLE #0 r283269: Fri May 22 09:14:57 CEST 2015
root at kg-u35jc.kg4.no:/usr/obj/usr/src/sys/GENERIC
Panic String: __lockmgr_args: recursing on non recursive lockmgr getblk @
(null):0
Dump Parity: 4100829037
Bounds: 1
Dump Status: good
Is this a known problem ( I tried searching, but didn't find anything), or
should I put it into Bugzilla?
(core.txt.[01] are available, but largish at over 200K each, so I didn't try
to get the mailing list to accept them)
--
Torfinn Ingolfsen <torfinn.ingolfsen at getmail.no>