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| author |   John Pittman <jpittman@redhat.com> | 2019-11-11 16:43:20 -0800 |
|---|---|---|
| committer |   Song Liu <songliubraving@fb.com> | 2019-11-11 16:47:39 -0800 |
| commit | 45422b704db392a6d79d07ee3e3670b11048bd53 (patch) | |
| tree | 9016082f0c4aa548924d50b9d749e30a5ee08fee /tools/perf/scripts/python/export-to-postgresql.py | |
| parent | md: avoid invalid memory access for array sb->dev_roles (diff) | |
| download | linux-rng-45422b704db392a6d79d07ee3e3670b11048bd53.tar.xz linux-rng-45422b704db392a6d79d07ee3e3670b11048bd53.zip | |
md/raid10: prevent access of uninitialized resync_pages offset
Due to unneeded multiplication in the out_free_pages portion of
r10buf_pool_alloc(), when using a 3-copy raid10 layout, it is
possible to access a resync_pages offset that has not been
initialized. This access translates into a crash of the system
within resync_free_pages() while passing a bad pointer to
put_page(). Remove the multiplication, preventing access to the
uninitialized area.
Fixes: f0250618361db ("md: raid10: don't use bio's vec table to manage resync pages")
Cc: stable@vger.kernel.org # 4.12+
Signed-off-by: John Pittman <jpittman@redhat.com>
Suggested-by: David Jeffery <djeffery@redhat.com>
Reviewed-by: Laurence Oberman <loberman@redhat.com>
Signed-off-by: Song Liu <songliubraving@fb.com>
Diffstat (limited to 'tools/perf/scripts/python/export-to-postgresql.py')
0 files changed, 0 insertions, 0 deletions