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Matthew Ahrens df7eeccc75 panic in bpobj_space(): null pointer dereference 
This is a race condition in the deadlist code.

A thread executing an administrative command that uses
dsl_deadlist_space_range() holds the lock of the whole deadlist_t to
protect the access of all its entries that the deadlist contains in an
avl tree.

Sync threads trying to insert a new entry in the deadlist (through
dsl_deadlist_insert() -> dle_enqueue()) do not hold the deadlist lock at
that moment.  If the dle_bpobj is the empty bpobj (our sentinel value),
we close and reopen it.  Between these two operations, it is possible
for the dsl_deadlist_space_range() thread to dereference that bpobj
which is NULL during that window.

Threads should hold the a deadlist's dl_lock when they manipulate its
internal data so scenarios like the one above are avoided.

Reviewed-by: Matthew Ahrens <mahrens@delphix.com>
Reviewed-by: Dan Kimmel <dan.kimmel@delphix.com>
Reviewed-by: George Melikov <mail@gmelikov.ru>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Matthew Ahrens <mahrens@delphix.com>
Closes #5762
2017-02-09 10:19:12 -08:00
.github Further work on Github usability (issue templates) 2017-01-03 15:01:48 -06:00
cmd Fix coverity defects: CID 155928 2017-02-07 09:29:47 -08:00
config Allow c99 code to compile 2017-02-08 09:27:48 -08:00
contrib contrib/dracut: fix syntax error in module-setup.sh 2017-01-31 14:25:49 -08:00
etc Fix zfs-mount.service failure on boot 2017-02-08 10:17:29 -08:00
include OpenZFS 4521 - zfstest is trying to execute evil "zfs unmount -a" 2017-02-03 13:24:44 -08:00
lib Fix coverity defects: CID 155964, 155965 2017-02-08 10:06:02 -08:00
man Add missing module_param for zfs_per_txg_dirty_frees_percent 2017-02-07 09:44:03 -08:00
module panic in bpobj_space(): null pointer dereference 2017-02-09 10:19:12 -08:00
rpm Add -c to zpool iostat & status to run command 2016-11-29 14:45:38 -07:00
scripts Move ziltest.sh to the ZTS framework 2017-02-08 17:28:22 -08:00
tests Move ziltest.sh to the ZTS framework 2017-02-08 17:28:22 -08:00
udev Fix spelling 2017-01-03 11:31:18 -06:00
.gitignore Update .gitignore 2016-10-19 14:29:33 -07:00
.gitmodules Add zimport.sh compatibility test script 2014-02-21 12:10:31 -08:00
AUTHORS Add a missing > to AUTHORS 2014-09-02 14:18:53 -07:00
autogen.sh build: do not call boilerplate ourself 2013-04-02 10:55:20 -07:00
configure.ac Add test for chattr 2016-12-16 16:07:41 -08:00
copy-builtin Illumos Crypto Port module added to enable native encryption in zfs 2016-07-20 10:43:30 -07:00
COPYRIGHT Update ZED copyright boilerplate 2015-05-11 15:07:00 -07:00
DISCLAIMER Fix minor typos and update marketing copy. 2013-03-21 12:51:06 -07:00
Makefile.am Use cstyle -cpP in make cstyle check 2016-12-12 10:46:26 -08:00
META Tag 0.7.0-rc3 2017-01-20 10:18:28 -08:00
OPENSOLARIS.LICENSE Add CDDL license file 2008-12-01 14:49:34 -08:00
README.markdown Add CONTRIBUTING information and templates 2016-12-09 12:48:12 -07:00
TEST Move ziltest.sh to the ZTS framework 2017-02-08 17:28:22 -08:00
zfs-script-config.sh.in Introduce tests for python scripts 2016-10-06 13:11:57 -07:00
zfs.release.in Move zfs.release generation to configure step 2012-07-12 12:22:51 -07:00

README.markdown

ZFS is an advanced file system and volume manager which was originally developed for Solaris and is now maintained by the Illumos community.

ZFS on Linux, which is also known as ZoL, is currently feature complete. It includes fully functional and stable SPA, DMU, ZVOL, and ZPL layers. And it's native!

Official Resources

Installation

Full documentation for installing ZoL on your favorite Linux distribution can be found at our site.

Contribute & Develop

We have a separate document with contribution guidelines.