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Fix off-by-one in __pipe_get_pages()
[cascardo/linux.git]
/
lib
/
iov_iter.c
diff --git
a/lib/iov_iter.c
b/lib/iov_iter.c
index
0ce3411
..
7312e77
100644
(file)
--- a/
lib/iov_iter.c
+++ b/
lib/iov_iter.c
@@
-833,13
+833,13
@@
static inline size_t __pipe_get_pages(struct iov_iter *i,
size_t *start)
{
struct pipe_inode_info *pipe = i->pipe;
size_t *start)
{
struct pipe_inode_info *pipe = i->pipe;
- size_t n = push_pipe(i, maxsize, &idx, start);
+ s
s
ize_t n = push_pipe(i, maxsize, &idx, start);
if (!n)
return -EFAULT;
maxsize = n;
n += *start;
if (!n)
return -EFAULT;
maxsize = n;
n += *start;
- while (n >
= PAGE_SIZE
) {
+ while (n >
0
) {
get_page(*pages++ = pipe->bufs[idx].page);
idx = next_idx(idx, pipe);
n -= PAGE_SIZE;
get_page(*pages++ = pipe->bufs[idx].page);
idx = next_idx(idx, pipe);
n -= PAGE_SIZE;