f2fs: sanity check size of nat and sit cache
Make sure number of entires doesn't exceed max journal size.
Cc: stable@vger.kernel.org
Signed-off-by: Jin Qian <jinqian@android.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index c1026b7..a739803 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -2495,6 +2495,8 @@ static int read_normal_summaries(struct f2fs_sb_info *sbi, int type)
static int restore_curseg_summaries(struct f2fs_sb_info *sbi)
{
+ struct f2fs_journal *sit_j = CURSEG_I(sbi, CURSEG_COLD_DATA)->journal;
+ struct f2fs_journal *nat_j = CURSEG_I(sbi, CURSEG_HOT_DATA)->journal;
int type = CURSEG_HOT_DATA;
int err;
@@ -2521,6 +2523,11 @@ static int restore_curseg_summaries(struct f2fs_sb_info *sbi)
return err;
}
+ /* sanity check for summary blocks */
+ if (nats_in_cursum(nat_j) > NAT_JOURNAL_ENTRIES ||
+ sits_in_cursum(sit_j) > SIT_JOURNAL_ENTRIES)
+ return -EINVAL;
+
return 0;
}