Tim Chase 8887c7d778 Prevent null dereferences when accessing dbuf kstat ...

In arc_buf_info(), the arc_buf_t may have no header.  If not, don't try
to fetch the arc buffer stats and instead just zero them.

The null dereferences were observed while accessing the dbuf kstat with
awk on a system in which millions of small files were being created in
order to overflow the system's metadata limit.

Signed-off-by: Tim Chase <tim@chase2k.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Chunwei Chen <david.chen@osnexus.com>
Closes #4837

2016-07-14 16:25:03 -07:00

..

avl

Support parallel build trees (VPATH builds)

2015-07-17 13:42:51 -07:00

nvpair

Support parallel build trees (VPATH builds)

2015-07-17 13:42:51 -07:00

unicode

Support parallel build trees (VPATH builds)

2015-07-17 13:42:51 -07:00

zcommon

Vectorized fletcher_4 must be 128-bit aligned

2016-06-29 11:22:22 -07:00

zfs

Prevent null dereferences when accessing dbuf kstat

2016-07-14 16:25:03 -07:00

zpios

Add large block support to zpios(1) benchmark

2015-09-22 09:13:20 -07:00

.gitignore

module/.gitignore: Add *.dwo (#4580)

2016-05-02 09:07:04 -07:00

Makefile.in

Prevent rm modules.* when make install

2015-12-02 14:39:12 -08:00