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ksmbd server fix, also for stable

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Merge tag '6.7rc7-smb3-srv-fix' of git://git.samba.org/ksmbd

Pull ksmbd server fix from Steve French:

 - address possible slab out of bounds in parsing of open requests

* tag '6.7rc7-smb3-srv-fix' of git://git.samba.org/ksmbd:
  ksmbd: fix slab-out-of-bounds in smb_strndup_from_utf16()
This commit is contained in:
Linus Torvalds 2023-12-28 16:12:23 -08:00
commit 8735c7c84d
1 changed files with 12 additions and 3 deletions
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15
fs/smb/server/smb2misc.c
View File

@ -106,16 +106,25 @@ static int smb2_get_data_area_len(unsigned int *off, unsigned int *len,
break;
case SMB2_CREATE:
{
unsigned short int name_off =
le16_to_cpu(((struct smb2_create_req *)hdr)->NameOffset);
unsigned short int name_len =
le16_to_cpu(((struct smb2_create_req *)hdr)->NameLength);
if (((struct smb2_create_req *)hdr)->CreateContextsLength) {
*off = le32_to_cpu(((struct smb2_create_req *)
hdr)->CreateContextsOffset);
*len = le32_to_cpu(((struct smb2_create_req *)
hdr)->CreateContextsLength);
break;
if (!name_len)
break;
if (name_off + name_len < (u64)*off + *len)
break;
}
*off = le16_to_cpu(((struct smb2_create_req *)hdr)->NameOffset);
*len = le16_to_cpu(((struct smb2_create_req *)hdr)->NameLength);
*off = name_off;
*len = name_len;
break;
}
case SMB2_QUERY_INFO: