diff options
Diffstat (limited to 'fs/read_write.c')
| -rw-r--r-- | fs/read_write.c | 66 |
1 files changed, 26 insertions, 40 deletions
diff --git a/fs/read_write.c b/fs/read_write.c index 124693e8d3f..1c177f29e1b 100644 --- a/fs/read_write.c +++ b/fs/read_write.c @@ -197,25 +197,27 @@ int rw_verify_area(int read_write, struct file *file, loff_t *ppos, size_t count { struct inode *inode; loff_t pos; + int retval = -EINVAL; inode = file->f_path.dentry->d_inode; if (unlikely((ssize_t) count < 0)) - goto Einval; + return retval; pos = *ppos; if (unlikely((pos < 0) || (loff_t) (pos + count) < 0)) - goto Einval; + return retval; if (unlikely(inode->i_flock && mandatory_lock(inode))) { - int retval = locks_mandatory_area( + retval = locks_mandatory_area( read_write == READ ? FLOCK_VERIFY_READ : FLOCK_VERIFY_WRITE, inode, file, pos, count); if (retval < 0) return retval; } + retval = security_file_permission(file, + read_write == READ ? MAY_READ : MAY_WRITE); + if (retval) + return retval; return count > MAX_RW_COUNT ? MAX_RW_COUNT : count; - -Einval: - return -EINVAL; } static void wait_on_retry_sync_kiocb(struct kiocb *iocb) @@ -267,18 +269,15 @@ ssize_t vfs_read(struct file *file, char __user *buf, size_t count, loff_t *pos) ret = rw_verify_area(READ, file, pos, count); if (ret >= 0) { count = ret; - ret = security_file_permission (file, MAY_READ); - if (!ret) { - if (file->f_op->read) - ret = file->f_op->read(file, buf, count, pos); - else - ret = do_sync_read(file, buf, count, pos); - if (ret > 0) { - fsnotify_access(file->f_path.dentry); - add_rchar(current, ret); - } - inc_syscr(current); + if (file->f_op->read) + ret = file->f_op->read(file, buf, count, pos); + else + ret = do_sync_read(file, buf, count, pos); + if (ret > 0) { + fsnotify_access(file->f_path.dentry); + add_rchar(current, ret); } + inc_syscr(current); } return ret; @@ -325,18 +324,15 @@ ssize_t vfs_write(struct file *file, const char __user *buf, size_t count, loff_ ret = rw_verify_area(WRITE, file, pos, count); if (ret >= 0) { count = ret; - ret = security_file_permission (file, MAY_WRITE); - if (!ret) { - if (file->f_op->write) - ret = file->f_op->write(file, buf, count, pos); - else - ret = do_sync_write(file, buf, count, pos); - if (ret > 0) { - fsnotify_modify(file->f_path.dentry); - add_wchar(current, ret); - } - inc_syscw(current); + if (file->f_op->write) + ret = file->f_op->write(file, buf, count, pos); + else + ret = do_sync_write(file, buf, count, pos); + if (ret > 0) { + fsnotify_modify(file->f_path.dentry); + add_wchar(current, ret); } + inc_syscw(current); } return ret; @@ -370,7 +366,7 @@ asmlinkage ssize_t sys_read(unsigned int fd, char __user * buf, size_t count) return ret; } -EXPORT_SYMBOL_GPL(sys_read); +EXPORT_UNUSED_SYMBOL_GPL(sys_read); /* to be deleted for 2.6.25 */ asmlinkage ssize_t sys_write(unsigned int fd, const char __user * buf, size_t count) { @@ -450,6 +446,7 @@ unsigned long iov_shorten(struct iovec *iov, unsigned long nr_segs, size_t to) } return seg; } +EXPORT_SYMBOL(iov_shorten); ssize_t do_sync_readv_writev(struct file *filp, const struct iovec *iov, unsigned long nr_segs, size_t len, loff_t *ppos, iov_fn_t fn) @@ -603,9 +600,6 @@ static ssize_t do_readv_writev(int type, struct file *file, ret = rw_verify_area(type, file, pos, tot_len); if (ret < 0) goto out; - ret = security_file_permission(file, type == READ ? MAY_READ : MAY_WRITE); - if (ret) - goto out; fnv = NULL; if (type == READ) { @@ -737,10 +731,6 @@ static ssize_t do_sendfile(int out_fd, int in_fd, loff_t *ppos, goto fput_in; count = retval; - retval = security_file_permission (in_file, MAY_READ); - if (retval) - goto fput_in; - /* * Get output file, and verify that it is ok.. */ @@ -759,10 +749,6 @@ static ssize_t do_sendfile(int out_fd, int in_fd, loff_t *ppos, goto fput_out; count = retval; - retval = security_file_permission (out_file, MAY_WRITE); - if (retval) - goto fput_out; - if (!max) max = min(in_inode->i_sb->s_maxbytes, out_inode->i_sb->s_maxbytes); |