]> git.baikalelectronics.ru Git - kernel.git/commit
projects / kernel.git / commit
? search:
summary | shortlog | log | commit | commitdiff | tree
(parent: e011243) | patch
vhost_vdpa: Fix potential underflow in vhost_vdpa_mmap()
authorDan Carpenter <dan.carpenter@oracle.com>
Wed, 10 Jun 2020 08:58:52 +0000 (11:58 +0300)
committerMichael S. Tsirkin <mst@redhat.com>
Mon, 22 Jun 2020 16:34:21 +0000 (12:34 -0400)
commitae77b39c2706c5304388645df671cddbd3d96d91
treea4e02555cb4414ee5a511125fbd063adafa31785tree | snapshot
parente0112432938be93531db6edfa188d6b463a7ac5acommit | diff
vhost_vdpa: Fix potential underflow in vhost_vdpa_mmap()

The "vma->vm_pgoff" variable is an unsigned long so if it's larger than
INT_MAX then "index" can be negative leading to an underflow.  Fix this
by changing the type of "index" to "unsigned long".

Fixes: 4bbe1b545731 ("vhost_vdpa: support doorbell mapping via mmap")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/20200610085852.GB5439@mwanda
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
drivers/vhost/vdpa.c diff | blob | history
Linux Kernel Source Tree.