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| author | John Pittman <jpittman@redhat.com> | 2018-08-23 13:35:55 -0400 |
|---|---|---|
| committer | Mike Snitzer <snitzer@redhat.com> | 2018-10-16 14:27:03 -0400 |
| commit | 22d4c291f58752d14efb8a185b772a3fc3e947d2 (patch) | |
| tree | 55144e1410ade5a605d19b444a409cfc133af7de /drivers/md/dm-log-userspace-base.c | |
| parent | cef6f55a9fb4f6d6f9df0f772aa64cf159997466 (diff) | |
| download | lwn-22d4c291f58752d14efb8a185b772a3fc3e947d2.tar.gz lwn-22d4c291f58752d14efb8a185b772a3fc3e947d2.zip | |
dm thin: use refcount_t for thin_c reference counting
The API surrounding refcount_t should be used in place of atomic_t
when variables are being used as reference counters. It can
potentially prevent reference counter overflows and use-after-free
conditions. In the dm thin layer, one such example is tc->refcount.
Change this from the atomic_t API to the refcount_t API to prevent
mentioned conditions.
Signed-off-by: John Pittman <jpittman@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'drivers/md/dm-log-userspace-base.c')
0 files changed, 0 insertions, 0 deletions