]> git.karo-electronics.de Git - linux-beck.git/commit
dm table: avoid crash if integrity profile changes
authorMike Snitzer <snitzer@redhat.com>
Sun, 25 Sep 2011 22:26:17 +0000 (23:26 +0100)
committerAlasdair G Kergon <agk@redhat.com>
Sun, 25 Sep 2011 22:26:17 +0000 (23:26 +0100)
commit876fbba1db4a377f050a2bb49b474c7527b2995d
treedf134b1c01cd6385afe7ff7171eb722063de6b4b
parent68e58a294fb26f692697179e3f3ecf88dd8cb97c
dm table: avoid crash if integrity profile changes

Commit a63a5cf (dm: improve block integrity support) introduced a
two-phase initialization of a DM device's integrity profile.  This
patch avoids dereferencing a NULL 'template_disk' pointer in
blk_integrity_register() if there is an integrity profile mismatch in
dm_table_set_integrity().

This can occur if the integrity profiles for stacked devices in a DM
table are changed between the call to dm_table_prealloc_integrity() and
dm_table_set_integrity().

Reported-by: Zdenek Kabelac <zkabelac@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Cc: stable@kernel.org # 2.6.39
drivers/md/dm-table.c