diff options
| author | Jin Qian <jinqian@google.com> | 2017-05-15 10:45:08 -0700 |
|---|---|---|
| committer | Sasha Levin <alexander.levin@verizon.com> | 2017-09-10 16:36:01 -0400 |
| commit | 604b43bbfe3bfd023d4cc6a4f9e8760f03346459 (patch) | |
| tree | 0a29e7b4489019c71e2d8984fa56b806b21a06e3 /fs | |
| parent | 0160d2f136e4e144306de56abb4043f5b5074552 (diff) | |
f2fs: sanity check checkpoint segno and blkoff
[ Upstream commit 15d3042a937c13f5d9244241c7a9c8416ff6e82a ]
Make sure segno and blkoff read from raw image are valid.
Cc: stable@vger.kernel.org
Signed-off-by: Jin Qian <jinqian@google.com>
[Jaegeuk Kim: adjust minor coding style]
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/f2fs/super.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c index 660183e9ab7c..f2ada269feb7 100644 --- a/fs/f2fs/super.c +++ b/fs/f2fs/super.c @@ -979,6 +979,8 @@ static int sanity_check_ckpt(struct f2fs_sb_info *sbi) unsigned int total, fsmeta; struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi); struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); + unsigned int main_segs, blocks_per_seg; + int i; total = le32_to_cpu(raw_super->segment_count); fsmeta = le32_to_cpu(raw_super->segment_count_ckpt); @@ -990,6 +992,20 @@ static int sanity_check_ckpt(struct f2fs_sb_info *sbi) if (unlikely(fsmeta >= total)) return 1; + main_segs = le32_to_cpu(raw_super->segment_count_main); + blocks_per_seg = sbi->blocks_per_seg; + + for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) { + if (le32_to_cpu(ckpt->cur_node_segno[i]) >= main_segs || + le16_to_cpu(ckpt->cur_node_blkoff[i]) >= blocks_per_seg) + return 1; + } + for (i = 0; i < NR_CURSEG_DATA_TYPE; i++) { + if (le32_to_cpu(ckpt->cur_data_segno[i]) >= main_segs || + le16_to_cpu(ckpt->cur_data_blkoff[i]) >= blocks_per_seg) + return 1; + } + if (unlikely(f2fs_cp_error(sbi))) { f2fs_msg(sbi->sb, KERN_ERR, "A bug case: need to run fsck"); return 1; |