| Message ID | 61494224-68a8-431b-ba76-46b4812c241c@paragon-software.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | fs/ntfs3: Bugfix and refactoring | expand |
Hi Konstantin, On Wed, Dec 6, 2023 at 4:12 PM Konstantin Komarovc <almaz.alexandrovich@paragon-software.com> wrote: > Signed-off-by: Konstantin Komarov <almaz.alexandrovich@paragon-software.com> Thanks for your patch, which is now commit d155617006ebc172 ("fs/ntfs3: Fix detected field-spanning write (size 8) of single field "le->name"") in next-20231207. > --- a/fs/ntfs3/ntfs.h > +++ b/fs/ntfs3/ntfs.h > @@ -523,7 +523,7 @@ struct ATTR_LIST_ENTRY { > __le64 vcn; // 0x08: Starting VCN of this attribute. > struct MFT_REF ref; // 0x10: MFT record number with attribute. > __le16 id; // 0x18: struct ATTRIB ID. > - __le16 name[3]; // 0x1A: Just to align. To get real name can > use bNameOffset. > + __le16 name[]; // 0x1A: Just to align. To get real name can > use name_off. noreply@ellerman.id.au reports for all m68k configs[1]: include/linux/build_bug.h:78:41: error: static assertion failed: "sizeof(struct ATTR_LIST_ENTRY) == 0x20" > > }; // sizeof(0x20) Indeed, we now have a hole of 4 bytes at the end of the structure, which shrinks the size of the structure on all architectures where alignof(u64) < sizeof(u64). So either the patch should be reverted, or explicit padding should be added. Your patch description is not very descriptive, so I don't know which is the correct solution. [1] http://kisskb.ellerman.id.au/kisskb/head/8e00ce02066e8f6f1ad5eab49a2ede7bf7a5ef64 Gr{oetje,eeting}s, Geert
diff --git a/fs/ntfs3/ntfs.h b/fs/ntfs3/ntfs.h index 86aecbb01a92..13e96fc63dae 100644 --- a/fs/ntfs3/ntfs.h +++ b/fs/ntfs3/ntfs.h @@ -523,7 +523,7 @@ struct ATTR_LIST_ENTRY { __le64 vcn; // 0x08: Starting VCN of this attribute. struct MFT_REF ref; // 0x10: MFT record number with attribute. __le16 id; // 0x18: struct ATTRIB ID. - __le16 name[3]; // 0x1A: Just to align. To get real name can use bNameOffset. + __le16 name[]; // 0x1A: Just to align. To get real name can use name_off.
Signed-off-by: Konstantin Komarov <almaz.alexandrovich@paragon-software.com> --- fs/ntfs3/ntfs.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) }; // sizeof(0x20)