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authorKonstantin Komarov <almaz.alexandrovich@paragon-software.com>2024-01-26 11:03:21 +0300
committerKonstantin Komarov <almaz.alexandrovich@paragon-software.com>2024-01-29 10:48:33 +0300
commit5ca87d01eba7bdfe9536a157ca33c1455bb8d16c (patch)
tree35aa502ecdee30160d26c1a91b5a3bc7dfc759ab /fs/ntfs3
parentd6d33f03baa43d763fe094ca926eeae7d3421d07 (diff)
fs/ntfs3: Prevent generic message "attempt to access beyond end of device"
It used in test environment. Signed-off-by: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>
Diffstat (limited to 'fs/ntfs3')
-rw-r--r--fs/ntfs3/fsntfs.c24
-rw-r--r--fs/ntfs3/ntfs_fs.h14
2 files changed, 25 insertions, 13 deletions
diff --git a/fs/ntfs3/fsntfs.c b/fs/ntfs3/fsntfs.c
index 321978019407..ae2ef5c11868 100644
--- a/fs/ntfs3/fsntfs.c
+++ b/fs/ntfs3/fsntfs.c
@@ -1007,6 +1007,30 @@ static inline __le32 security_hash(const void *sd, size_t bytes)
return cpu_to_le32(hash);
}
+/*
+ * simple wrapper for sb_bread_unmovable.
+ */
+struct buffer_head *ntfs_bread(struct super_block *sb, sector_t block)
+{
+ struct ntfs_sb_info *sbi = sb->s_fs_info;
+ struct buffer_head *bh;
+
+ if (unlikely(block >= sbi->volume.blocks)) {
+ /* prevent generic message "attempt to access beyond end of device" */
+ ntfs_err(sb, "try to read out of volume at offset 0x%llx",
+ (u64)block << sb->s_blocksize_bits);
+ return NULL;
+ }
+
+ bh = sb_bread_unmovable(sb, block);
+ if (bh)
+ return bh;
+
+ ntfs_err(sb, "failed to read volume at offset 0x%llx",
+ (u64)block << sb->s_blocksize_bits);
+ return NULL;
+}
+
int ntfs_sb_read(struct super_block *sb, u64 lbo, size_t bytes, void *buffer)
{
struct block_device *bdev = sb->s_bdev;
diff --git a/fs/ntfs3/ntfs_fs.h b/fs/ntfs3/ntfs_fs.h
index 2b54ae94440f..81f7563428ee 100644
--- a/fs/ntfs3/ntfs_fs.h
+++ b/fs/ntfs3/ntfs_fs.h
@@ -586,6 +586,7 @@ bool check_index_header(const struct INDEX_HDR *hdr, size_t bytes);
int log_replay(struct ntfs_inode *ni, bool *initialized);
/* Globals from fsntfs.c */
+struct buffer_head *ntfs_bread(struct super_block *sb, sector_t block);
bool ntfs_fix_pre_write(struct NTFS_RECORD_HEADER *rhdr, size_t bytes);
int ntfs_fix_post_read(struct NTFS_RECORD_HEADER *rhdr, size_t bytes,
bool simple);
@@ -1032,19 +1033,6 @@ static inline u64 bytes_to_block(const struct super_block *sb, u64 size)
return (size + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
}
-static inline struct buffer_head *ntfs_bread(struct super_block *sb,
- sector_t block)
-{
- struct buffer_head *bh = sb_bread_unmovable(sb, block);
-
- if (bh)
- return bh;
-
- ntfs_err(sb, "failed to read volume at offset 0x%llx",
- (u64)block << sb->s_blocksize_bits);
- return NULL;
-}
-
static inline struct ntfs_inode *ntfs_i(struct inode *inode)
{
return container_of(inode, struct ntfs_inode, vfs_inode);