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authorElena Reshetova <elena.reshetova@intel.com>2017-03-03 10:55:11 +0200
committerDavid Sterba <dsterba@suse.com>2017-04-18 14:07:23 +0200
commit9b64f57ddf8673d29fafb3405d4aa1e93f5a4cd7 (patch)
treed2a39847438cd265d8c0dbc3c61550980753e59a /fs/btrfs/ordered-data.c
parent140475ae4ad10d140bb69572499b1ff87367e807 (diff)
downloadlinux-9b64f57ddf8673d29fafb3405d4aa1e93f5a4cd7.tar.bz2
btrfs: convert btrfs_transaction.use_count from atomic_t to refcount_t
refcount_t type and corresponding API should be used instead of atomic_t when the variable is used as a reference counter. This allows to avoid accidental refcounter overflows that might lead to use-after-free situations. Signed-off-by: Elena Reshetova <elena.reshetova@intel.com> Signed-off-by: Hans Liljestrand <ishkamiel@gmail.com> Signed-off-by: Kees Cook <keescook@chromium.org> Signed-off-by: David Windsor <dwindsor@gmail.com> Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/ordered-data.c')
-rw-r--r--fs/btrfs/ordered-data.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/btrfs/ordered-data.c b/fs/btrfs/ordered-data.c
index 9a46878ba60f..da5399f9fb54 100644
--- a/fs/btrfs/ordered-data.c
+++ b/fs/btrfs/ordered-data.c
@@ -623,7 +623,7 @@ void btrfs_remove_ordered_extent(struct inode *inode,
spin_lock(&fs_info->trans_lock);
trans = fs_info->running_transaction;
if (trans)
- atomic_inc(&trans->use_count);
+ refcount_inc(&trans->use_count);
spin_unlock(&fs_info->trans_lock);
ASSERT(trans);