diff options
| author | Mark Bloch <markb@mellanox.com> | 2016-10-27 16:36:31 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-11-26 09:56:58 +0100 |
| commit | 46e47543175b6784b02f7b587ef83b44fd2c8f7d (patch) | |
| tree | bf801c2e882a26fce8afeef1a1b063c603a0a738 /drivers | |
| parent | 82c377d0531156d30e6d26c3eb13122e8c1c8677 (diff) | |
| download | lwn-46e47543175b6784b02f7b587ef83b44fd2c8f7d.tar.gz lwn-46e47543175b6784b02f7b587ef83b44fd2c8f7d.zip | |
IB/core: Avoid unsigned int overflow in sg_alloc_table
commit 3c7ba5760ab8eedec01159b267bb9bfcffe522ac upstream.
sg_alloc_table gets unsigned int as parameter while the driver
returns it as size_t. Check npages isn't greater than maximum
unsigned int.
Fixes: eeb8461e36c9 ("IB: Refactor umem to use linear SG table")
Signed-off-by: Mark Bloch <markb@mellanox.com>
Signed-off-by: Maor Gottlieb <maorg@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/infiniband/core/umem.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/infiniband/core/umem.c b/drivers/infiniband/core/umem.c index c68746ce6624..bdab61d9103c 100644 --- a/drivers/infiniband/core/umem.c +++ b/drivers/infiniband/core/umem.c @@ -174,7 +174,7 @@ struct ib_umem *ib_umem_get(struct ib_ucontext *context, unsigned long addr, cur_base = addr & PAGE_MASK; - if (npages == 0) { + if (npages == 0 || npages > UINT_MAX) { ret = -EINVAL; goto out; } |