diff options
| author | Jin Qian <[email protected]> | 2017-05-15 10:45:08 -0700 |
|---|---|---|
| committer | Jaegeuk Kim <[email protected]> | 2017-05-16 13:29:39 -0700 |
| commit | 15d3042a937c13f5d9244241c7a9c8416ff6e82a (patch) | |
| tree | 6846c1ef913a8c518a0728032f5ad75749e28b21 | |
| parent | 2d3e4866dea96b0506395b47bfefb234f2088dac (diff) | |
f2fs: sanity check checkpoint segno and blkoff
Make sure segno and blkoff read from raw image are valid.
Cc: [email protected]
Signed-off-by: Jin Qian <[email protected]>
[Jaegeuk Kim: adjust minor coding style]
Signed-off-by: Jaegeuk Kim <[email protected]>
| -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 83355ec4a92c..397b1e816b36 100644 --- a/fs/f2fs/super.c +++ b/fs/f2fs/super.c @@ -1521,6 +1521,8 @@ int sanity_check_ckpt(struct f2fs_sb_info *sbi) struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi); struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); unsigned int ovp_segments, reserved_segments; + 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); @@ -1542,6 +1544,20 @@ int sanity_check_ckpt(struct f2fs_sb_info *sbi) 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; |