From: Milan Broz <mbroz@redhat.com>
To: device-mapper development <dm-devel@redhat.com>
Subject: [PATCH] Do not process sysfs attributes when device is being destructed
Date: Sun, 31 May 2009 22:55:00 +0200 [thread overview]
Message-ID: <4A22EEA4.5010708@redhat.com> (raw)
Do not process sysfs attributes when device is being destructed.
Otherwise code can cause
BUG_ON(test_bit(DMF_FREEING, &md->flags));
in dm_put() call.
Signed-off-by: Milan Broz <mbroz@redhat.com>
---
drivers/md/dm.c | 4 ++++
1 files changed, 4 insertions(+), 0 deletions(-)
diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index f43b099..9d3595b 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -1806,6 +1806,10 @@ struct mapped_device *dm_get_from_kobject(struct kobject *kobj)
if (&md->kobj != kobj)
return NULL;
+ if (test_bit(DMF_FREEING, &md->flags) ||
+ test_bit(DMF_DELETING, &md->flags))
+ return NULL;
+
dm_get(md);
return md;
}
reply other threads:[~2009-05-31 20:55 UTC|newest]
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