Commit 336c1662 authored by Roberto Bergantinos Corpas's avatar Roberto Bergantinos Corpas Committed by Greg Kroah-Hartman

CIFS: cifs_read_allocate_pages: don't iterate through whole page array on ENOMEM

commit 31fad7d41e73731f05b8053d17078638cf850fa6 upstream.

 In cifs_read_allocate_pages, in case of ENOMEM, we go through
whole rdata->pages array but we have failed the allocation before
nr_pages, therefore we may end up calling put_page with NULL
pointer, causing oops
Signed-off-by: default avatarRoberto Bergantinos Corpas <rbergant@redhat.com>
Acked-by: default avatarPavel Shilovsky <pshilov@microsoft.com>
Signed-off-by: default avatarSteve French <stfrench@microsoft.com>
CC: Stable <stable@vger.kernel.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 360f8fe4
......@@ -2829,7 +2829,9 @@ cifs_read_allocate_pages(struct cifs_readdata *rdata, unsigned int nr_pages)
}
if (rc) {
for (i = 0; i < nr_pages; i++) {
unsigned int nr_page_failed = i;
for (i = 0; i < nr_page_failed; i++) {
put_page(rdata->pages[i]);
rdata->pages[i] = NULL;
}
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment