Commit 21d3f8e1 authored by Jin Qian's avatar Jin Qian Committed by Jaegeuk Kim

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: default avatarJin Qian <jinqian@android.com>
Reviewed-by: default avatarChao Yu <yuchao0@huawei.com>
Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent d4fdf8ba
...@@ -2495,6 +2495,8 @@ static int read_normal_summaries(struct f2fs_sb_info *sbi, int type) ...@@ -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) 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 type = CURSEG_HOT_DATA;
int err; int err;
...@@ -2521,6 +2523,11 @@ static int restore_curseg_summaries(struct f2fs_sb_info *sbi) ...@@ -2521,6 +2523,11 @@ static int restore_curseg_summaries(struct f2fs_sb_info *sbi)
return err; 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; return 0;
} }
......
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