summaryrefslogtreecommitdiffstats
path: root/drivers/clocksource
diff options
context:
space:
mode:
authorMikulas Patocka <mpatocka@redhat.com>2018-04-19 08:33:00 -0400
committerMike Snitzer <snitzer@redhat.com>2018-04-30 11:51:39 -0400
commitf7879b4cea4b7867e7382efdbd805fbe35835337 (patch)
treebb6b18ca48bde0f32f82b38ed28e8126f24ae755 /drivers/clocksource
parentfc8cec113904a47396bf0a1afc62920d66319d36 (diff)
downloadlinux-f7879b4cea4b7867e7382efdbd805fbe35835337.tar.bz2
dm bufio: fix buffer alignment
Commit 6b5e718cc138 ("dm bufio: relax alignment constraint on slab cache") relaxed alignment on dm-bufio cache, however it may break dm-crypt or dm-integrity. dm-crypt and dm-integrity require that the size of bio vector entries (bv_len) is aligned on its sector size. bv_offset doesn't have to be aligned, but bv_len must be. XFS sends unaligned bios, but they do not cross page boundary, so the requirement for aligned bv_len is met. Commit 6b5e718cc138 made dm-bufio send unaligned bios that cross page boundary, this could break dm-crypt and dm-integrity. Reinstates the alignment. Note that misaligned entries only happen when we use slab/slub debugging. Without debugging, the entries are always aligned. Fixes: 6b5e718cc138 ("dm bufio: relax alignment constraint on slab cache") Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'drivers/clocksource')
0 files changed, 0 insertions, 0 deletions