diff options
| author | Linux Build Service Account <lnxbuild@localhost> | 2019-06-17 10:19:39 -0700 |
|---|---|---|
| committer | Gerrit - the friendly Code Review server <code-review@localhost> | 2019-06-17 10:19:38 -0700 |
| commit | 4e933027e6848a194b03aa35c26bc20fe06205e9 (patch) | |
| tree | ab1dda795bb590c589a5af45f0692b3b6f3c3931 /drivers/misc/genwqe/card_utils.c | |
| parent | c176a066dfd36e31ebaf2796a12b2c523e7083dc (diff) | |
| parent | 5ef154a26639ad07ed3ebdaea1dabe29065982b0 (diff) | |
Merge "Merge android-4.4.181 (bd858d7) into msm-4.4"
Diffstat (limited to 'drivers/misc/genwqe/card_utils.c')
| -rw-r--r-- | drivers/misc/genwqe/card_utils.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/misc/genwqe/card_utils.c b/drivers/misc/genwqe/card_utils.c index 0c15ba21fa54..d4c719683a8a 100644 --- a/drivers/misc/genwqe/card_utils.c +++ b/drivers/misc/genwqe/card_utils.c @@ -582,6 +582,10 @@ int genwqe_user_vmap(struct genwqe_dev *cd, struct dma_mapping *m, void *uaddr, /* determine space needed for page_list. */ data = (unsigned long)uaddr; offs = offset_in_page(data); + if (size > ULONG_MAX - PAGE_SIZE - offs) { + m->size = 0; /* mark unused and not added */ + return -EINVAL; + } m->nr_pages = DIV_ROUND_UP(offs + size, PAGE_SIZE); m->page_list = kcalloc(m->nr_pages, |