fs/ntfs3: Check fields while reading
Added new functions index_hdr_check and index_buf_check.
Now we check all stuff for correctness while reading from disk.
Also fixed bug with stale nfs data.
Reported-by: van fantasy <g1042620637@gmail.com>
Signed-off-by: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>
diff --git a/fs/ntfs3/run.c b/fs/ntfs3/run.c
index aaaa0d3d..12d8682 100644
--- a/fs/ntfs3/run.c
+++ b/fs/ntfs3/run.c
@@ -919,12 +919,15 @@ int run_pack(const struct runs_tree *run, CLST svcn, CLST len, u8 *run_buf,
*/
int run_unpack(struct runs_tree *run, struct ntfs_sb_info *sbi, CLST ino,
CLST svcn, CLST evcn, CLST vcn, const u8 *run_buf,
- u32 run_buf_size)
+ int run_buf_size)
{
u64 prev_lcn, vcn64, lcn, next_vcn;
const u8 *run_last, *run_0;
bool is_mft = ino == MFT_REC_MFT;
+ if (run_buf_size < 0)
+ return -EINVAL;
+
/* Check for empty. */
if (evcn + 1 == svcn)
return 0;
@@ -1046,7 +1049,7 @@ int run_unpack(struct runs_tree *run, struct ntfs_sb_info *sbi, CLST ino,
*/
int run_unpack_ex(struct runs_tree *run, struct ntfs_sb_info *sbi, CLST ino,
CLST svcn, CLST evcn, CLST vcn, const u8 *run_buf,
- u32 run_buf_size)
+ int run_buf_size)
{
int ret, err;
CLST next_vcn, lcn, len;
