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fs/ntfs3: Validate attribute data and valid sizes
commit 019d22eb upstream. The data_size and valid_size fields of non resident attributes should be less than the its alloc_size field, but this is not checked in ntfs_read_mft function. Syzbot reports a allocation order warning due to a large unchecked value of data_size getting assigned to inode->i_size which is then passed to kcalloc. Add sanity check for ensuring that the data_size and valid_size fields are not larger than alloc_size field. Link: https://syzkaller.appspot.com/bug?extid=fa4648a5446460b7b963 Reported-and-tested-by:<syzbot+fa4648a5446460b7b963@syzkaller.appspotmail.com> Fixes: (82cae269) fs/ntfs3: Add initialization of super block Signed-off-by:
Abdun Nihaal <abdun.nihaal@gmail.com> Signed-off-by:
Konstantin Komarov <almaz.alexandrovich@paragon-software.com> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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