diff options
Diffstat (limited to 'mm/filemap.c')
| -rw-r--r-- | mm/filemap.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/mm/filemap.c b/mm/filemap.c index 5f2504428f3d..196779e8e396 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -2620,12 +2620,14 @@ ssize_t filemap_read(struct kiocb *iocb, struct iov_iter *iter, loff_t isize, end_offset; loff_t last_pos = ra->prev_pos; + if (unlikely(iocb->ki_pos < 0)) + return -EINVAL; if (unlikely(iocb->ki_pos >= inode->i_sb->s_maxbytes)) return 0; if (unlikely(!iov_iter_count(iter))) return 0; - iov_iter_truncate(iter, inode->i_sb->s_maxbytes); + iov_iter_truncate(iter, inode->i_sb->s_maxbytes - iocb->ki_pos); folio_batch_init(&fbatch); do { |