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fs/ntfs3: Fix field-spanning write in INDEX_HDR

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Fields flags and res[3] replaced with one 4 byte flags.

Fixes: 4534a70b70 ("fs/ntfs3: Add headers and misc files")
Signed-off-by: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>
This commit is contained in:
Konstantin Komarov 2024-06-17 15:13:09 +03:00
parent c091354d6b
commit 2f3e176fee
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GPG Key ID: A9B0331F832407B6
2 changed files with 7 additions and 6 deletions
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4
fs/ntfs3/index.c
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@ -978,7 +978,7 @@ static struct indx_node *indx_new(struct ntfs_index *indx,
hdr->used =
cpu_to_le32(eo + sizeof(struct NTFS_DE) + sizeof(u64));
de_set_vbn_le(e, *sub_vbn);
hdr->flags = 1;
hdr->flags = NTFS_INDEX_HDR_HAS_SUBNODES;
} else {
e->size = cpu_to_le16(sizeof(struct NTFS_DE));
hdr->used = cpu_to_le32(eo + sizeof(struct NTFS_DE));
@ -1683,7 +1683,7 @@ static int indx_insert_into_root(struct ntfs_index *indx, struct ntfs_inode *ni,
e->size = cpu_to_le16(sizeof(struct NTFS_DE) + sizeof(u64));
e->flags = NTFS_IE_HAS_SUBNODES | NTFS_IE_LAST;
hdr->flags = 1;
hdr->flags = NTFS_INDEX_HDR_HAS_SUBNODES;
hdr->used = hdr->total =
cpu_to_le32(new_root_size - offsetof(struct INDEX_ROOT, ihdr));

9
fs/ntfs3/ntfs.h
View File

@ -693,14 +693,15 @@ static inline bool de_has_vcn_ex(const struct NTFS_DE *e)
offsetof(struct ATTR_FILE_NAME, name) + \
NTFS_NAME_LEN * sizeof(short), 8)
#define NTFS_INDEX_HDR_HAS_SUBNODES cpu_to_le32(1)
struct INDEX_HDR {
__le32 de_off; // 0x00: The offset from the start of this structure
// to the first NTFS_DE.
__le32 used; // 0x04: The size of this structure plus all
// entries (quad-word aligned).
__le32 total; // 0x08: The allocated size of for this structure plus all entries.
u8 flags; // 0x0C: 0x00 = Small directory, 0x01 = Large directory.
u8 res[3];
__le32 flags; // 0x0C: 0x00 = Small directory, 0x01 = Large directory.
//
// de_off + used <= total
@ -748,7 +749,7 @@ static inline struct NTFS_DE *hdr_next_de(const struct INDEX_HDR *hdr,
static inline bool hdr_has_subnode(const struct INDEX_HDR *hdr)
{
return hdr->flags & 1;
return hdr->flags & NTFS_INDEX_HDR_HAS_SUBNODES;
}
struct INDEX_BUFFER {
@ -768,7 +769,7 @@ static inline bool ib_is_empty(const struct INDEX_BUFFER *ib)
static inline bool ib_is_leaf(const struct INDEX_BUFFER *ib)
{
return !(ib->ihdr.flags & 1);
return !(ib->ihdr.flags & NTFS_INDEX_HDR_HAS_SUBNODES);
}
/* Index root structure ( 0x90 ). */