From: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>
To: <ntfs3@lists.linux.dev>
Cc: <linux-kernel@vger.kernel.org>, <linux-fsdevel@vger.kernel.org>
Subject: [PATCH] fs/ntfs3: Disable ATTR_LIST_ENTRY size check
Date: Thu, 21 Dec 2023 14:35:39 +0300 [thread overview]
Message-ID: <894db108-509b-4026-a90e-666a759a3f9f@paragon-software.com> (raw)
The use of sizeof(struct ATTR_LIST_ENTRY) has been replaced with le_size(0)
due to alignment peculiarities on different platforms.
Reported-by: kernel test robot <lkp@intel.com>
Closes:
https://lore.kernel.org/oe-kbuild-all/202312071005.g6YrbaIe-lkp@intel.com/
Signed-off-by: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>
---
fs/ntfs3/attrlist.c | 8 ++++----
fs/ntfs3/ntfs.h | 2 --
2 files changed, 4 insertions(+), 6 deletions(-)
diff --git a/fs/ntfs3/attrlist.c b/fs/ntfs3/attrlist.c
index 7c01735d1219..48e7da47c6b7 100644
--- a/fs/ntfs3/attrlist.c
+++ b/fs/ntfs3/attrlist.c
@@ -127,12 +127,13 @@ struct ATTR_LIST_ENTRY *al_enumerate(struct
ntfs_inode *ni,
{
size_t off;
u16 sz;
+ const unsigned le_min_size = le_size(0);
if (!le) {
le = ni->attr_list.le;
} else {
sz = le16_to_cpu(le->size);
- if (sz < sizeof(struct ATTR_LIST_ENTRY)) {
+ if (sz < le_min_size) {
/* Impossible 'cause we should not return such le. */
return NULL;
}
@@ -141,7 +142,7 @@ struct ATTR_LIST_ENTRY *al_enumerate(struct
ntfs_inode *ni,
/* Check boundary. */
off = PtrOffset(ni->attr_list.le, le);
- if (off + sizeof(struct ATTR_LIST_ENTRY) > ni->attr_list.size) {
+ if (off + le_min_size > ni->attr_list.size) {
/* The regular end of list. */
return NULL;
}
@@ -149,8 +150,7 @@ struct ATTR_LIST_ENTRY *al_enumerate(struct
ntfs_inode *ni,
sz = le16_to_cpu(le->size);
/* Check le for errors. */
- if (sz < sizeof(struct ATTR_LIST_ENTRY) ||
- off + sz > ni->attr_list.size ||
+ if (sz < le_min_size || off + sz > ni->attr_list.size ||
sz < le->name_off + le->name_len * sizeof(short)) {
return NULL;
}
diff --git a/fs/ntfs3/ntfs.h b/fs/ntfs3/ntfs.h
index c8981429c721..9c7478150a03 100644
--- a/fs/ntfs3/ntfs.h
+++ b/fs/ntfs3/ntfs.h
@@ -527,8 +527,6 @@ struct ATTR_LIST_ENTRY {
}; // sizeof(0x20)
-static_assert(sizeof(struct ATTR_LIST_ENTRY) == 0x20);
-
static inline u32 le_size(u8 name_len)
{
return ALIGN(offsetof(struct ATTR_LIST_ENTRY, name) +
--
2.34.1
reply other threads:[~2023-12-21 11:44 UTC|newest]
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