diff options
| author | Heinz Mauelshagen <heinzm@redhat.com> | 2014-03-11 23:40:05 (GMT) |
|---|---|---|
| committer | Jiri Slaby <jslaby@suse.cz> | 2014-03-24 08:44:59 (GMT) |
| commit | 67f1830fcdaefd65371bdd1bba38ca29cf7c2bbf (patch) | |
| tree | a613923c919f09cfa38072efd04ce645806c817a /drivers/staging/slicoss | |
| parent | b07b194d5cdc0f8cf63bf0039574afef416fafce (diff) | |
| download | linux-fsl-qoriq-67f1830fcdaefd65371bdd1bba38ca29cf7c2bbf.tar.xz | |
dm cache: fix truncation bug when copying a block to/from >2TB fast device
commit 8b9d96666529a979acf4825391efcc7c8a3e9f12 upstream.
During demotion or promotion to a cache's >2TB fast device we must not
truncate the cache block's associated sector to 32bits. The 32bit
temporary result of from_cblock() caused a 32bit multiplication when
calculating the sector of the fast device in issue_copy_real().
Use an intermediate 64bit type to store the 32bit from_cblock() to allow
for proper 64bit multiplication.
Here is an example of how this bug manifests on an ext4 filesystem:
EXT4-fs error (device dm-0): ext4_mb_generate_buddy:756: group 17136, 32768 clusters in bitmap, 30688 in gd; block bitmap corrupt.
JBD2: Spotted dirty metadata buffer (dev = dm-0, blocknr = 0). There's a risk of filesystem corruption in case of system crash.
Signed-off-by: Heinz Mauelshagen <heinzm@redhat.com>
Acked-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Diffstat (limited to 'drivers/staging/slicoss')
0 files changed, 0 insertions, 0 deletions