freebsd-nq/module
Alexander Motin 5ff2249fa5 Fix use-after-free in case of L2ARC prefetch failure
In case L2ARC read failed, l2arc_read_done() creates _different_ ZIO
to read data from the original storage device.  Unfortunately pointer
to the failed ZIO remains in hdr->b_l1hdr.b_acb->acb_zio_head, and if
some other read try to bump the ZIO priority, it will crash.

The problem is reproducible by corrupting L2ARC content and reading
some data with prefetch if l2arc_noprefetch tunable is changed to 0.
With the default setting the issue is probably not reproducible now.

Reviewed-by: Tom Caputi <tcaputi@datto.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Alexander Motin <mav@FreeBSD.org>
Sponsored-By: iXsystems, Inc.
Closes #9648
2019-12-03 09:59:30 -08:00
..
avl Wrap Linux module macros 2019-11-01 10:41:03 -07:00
icp Fix icp build on FreeBSD 2019-11-01 10:27:53 -07:00
lua Move linux qsort def to platform header 2019-12-03 09:49:40 -08:00
nvpair Restructure nvlist_nv_alloc to work on FreeBSD 2019-11-30 15:45:06 -08:00
os Move zfs_cmd_t copyin/copyout to platform code 2019-12-02 10:08:27 -08:00
spl OpenZFS restructuring - move platform specific sources 2019-09-06 11:26:26 -07:00
unicode Wrap Linux module macros 2019-11-01 10:41:03 -07:00
zcommon Increase allowed 'special_small_blocks' maximum value 2019-12-03 09:58:03 -08:00
zfs Fix use-after-free in case of L2ARC prefetch failure 2019-12-03 09:59:30 -08:00
.gitignore Adapt gitignore for modules 2019-12-02 13:23:47 -08:00
Makefile.in module/Makefile.in: don't run xargs if empty 2019-10-08 10:10:23 -07:00