diff options
| -rw-r--r-- | fs/aio.c | 30 |
1 files changed, 14 insertions, 16 deletions
@@ -1456,6 +1456,10 @@ static ssize_t aio_setup_vectored_rw(int type, struct kiocb *kiocb, bool compat) if (ret < 0) goto out; + ret = rw_verify_area(type, kiocb->ki_filp, &kiocb->ki_pos, ret); + if (ret < 0) + goto out; + kiocb->ki_nr_segs = kiocb->ki_nbytes; kiocb->ki_cur_seg = 0; /* ki_nbytes/left now reflect bytes instead of segs */ @@ -1467,11 +1471,17 @@ out: return ret; } -static ssize_t aio_setup_single_vector(struct kiocb *kiocb) +static ssize_t aio_setup_single_vector(int type, struct file * file, struct kiocb *kiocb) { + int bytes; + + bytes = rw_verify_area(type, file, &kiocb->ki_pos, kiocb->ki_left); + if (bytes < 0) + return bytes; + kiocb->ki_iovec = &kiocb->ki_inline_vec; kiocb->ki_iovec->iov_base = kiocb->ki_buf; - kiocb->ki_iovec->iov_len = kiocb->ki_left; + kiocb->ki_iovec->iov_len = bytes; kiocb->ki_nr_segs = 1; kiocb->ki_cur_seg = 0; return 0; @@ -1496,10 +1506,7 @@ static ssize_t aio_setup_iocb(struct kiocb *kiocb, bool compat) if (unlikely(!access_ok(VERIFY_WRITE, kiocb->ki_buf, kiocb->ki_left))) break; - ret = security_file_permission(file, MAY_READ); - if (unlikely(ret)) - break; - ret = aio_setup_single_vector(kiocb); + ret = aio_setup_single_vector(READ, file, kiocb); if (ret) break; ret = -EINVAL; @@ -1514,10 +1521,7 @@ static ssize_t aio_setup_iocb(struct kiocb *kiocb, bool compat) if (unlikely(!access_ok(VERIFY_READ, kiocb->ki_buf, kiocb->ki_left))) break; - ret = security_file_permission(file, MAY_WRITE); - if (unlikely(ret)) - break; - ret = aio_setup_single_vector(kiocb); + ret = aio_setup_single_vector(WRITE, file, kiocb); if (ret) break; ret = -EINVAL; @@ -1528,9 +1532,6 @@ static ssize_t aio_setup_iocb(struct kiocb *kiocb, bool compat) ret = -EBADF; if (unlikely(!(file->f_mode & FMODE_READ))) break; - ret = security_file_permission(file, MAY_READ); - if (unlikely(ret)) - break; ret = aio_setup_vectored_rw(READ, kiocb, compat); if (ret) break; @@ -1542,9 +1543,6 @@ static ssize_t aio_setup_iocb(struct kiocb *kiocb, bool compat) ret = -EBADF; if (unlikely(!(file->f_mode & FMODE_WRITE))) break; - ret = security_file_permission(file, MAY_WRITE); - if (unlikely(ret)) - break; ret = aio_setup_vectored_rw(WRITE, kiocb, compat); if (ret) break; |