| commit | 570b9d968bf9b16974252ef7cbce73fa6dac34f3 | [log] [tgz] |
|---|---|---|
| author | Alasdair G Kergon <agk@redhat.com> | Thu Apr 02 19:55:28 2009 +0100 |
| committer | Alasdair G Kergon <agk@redhat.com> | Thu Apr 02 19:55:28 2009 +0100 |
| tree | 1a356ada71b373b363f9fc2204769f8eee920f30 | |
| parent | aea9058801c0acfa2831af1714da412dfb0018c2 [diff] |
dm table: fix upgrade mode race upgrade_mode() sets bdev to NULL temporarily, and does not have any locking to exclude anything from seeing that NULL. In dm_table_any_congested() bdev_get_queue() can dereference that NULL and cause a reported oops. Fix this by not changing that field during the mode upgrade. Cc: stable@kernel.org Cc: Neil Brown <neilb@suse.de> Signed-off-by: Alasdair G Kergon <agk@redhat.com>