Commit ec695579 authored Feb 04, 2014 by Al Viro

read_code(): go through vfs_read() instead of calling the method directly



... and don't skip on sanity checks.  It's *not* a hot path, TYVM
(a couple of calls per a.out execve(), for pity sake) and headers of
random a.out binary are not to be trusted.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

parent 0165e810

fs/exec.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -810,7 +810,7 @@ EXPORT_SYMBOL(kernel_read);

		ssize_t read_code(struct file *file, unsigned long addr, loff_t pos, size_t len)
		{
		ssize_t res = file->f_op->read(file, (void __user *)addr, len, &pos);
		ssize_t res = vfs_read(file, (void __user *)addr, len, &pos);
		if (res > 0)
		flush_icache_range(addr, addr + len);
		return res;