Files
apfstests/tests/xfs
Eric Sandeen 052b0777d7 xfs: testcase for kernelspace xfs_fsr extent handling flaw
This is a testcase for a bug which goes way back; googling
"xfs_trans_log_inode NULL pointer dereference" yields sporadic
reports over several years.

The test sets up several two-extent files with speculative
preallocation on them, and then runs xfs_fsr.  The kernelside
code ignores the preallocation, and therefore sets up the
temporary inode incorrectly after the inode fork swap.

It is a "dangerous" test because the extent mishandling on
the temporary inode causes a null pointer dereference and
oops when the inode's i_itemp pointer gets overwritten
and we blow up in logging code that tries to use it.

Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Reviewed-by: Eryu Guan <eguan@redhat.com>
Signed-off-by: Eryu Guan <eguan@redhat.com>
2016-11-13 14:01:07 +08:00
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