dm raid: fix panic when attempting to force a raid to sync

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[ Upstream commit 2339784490 ]

Requesting a sync on an active raid device via a table reload
(see 'sync' parameter in Documentation/device-mapper/dm-raid.txt)
skips the super_load() call that defines the superblock size
(rdev->sb_size) -- resulting in an oops if/when super_sync()->memset()
is called.

Fix by moving the initialization of the superblock start and size
out of super_load() to the caller (analyse_superblocks).

Signed-off-by: Heinz Mauelshagen <heinzm@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Heinz Mauelshagen 2017-11-02 19:58:28 +01:00 • committed by Greg Kroah-Hartman

parent 0ad0bb6016

commit 2c727856d0

1 changed files with 11 additions and 10 deletions

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drivers/md/dm-raid.c

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