tree 215df31b596a24b9ca52fed8c59af23d463cac51
parent f394f12169e7ba0dc7770794ea623e255028cb93
author Mikulas Patocka <mpatocka@redhat.com> 1704812276 +0100
committer COS Cherry Picker <cloud-image-release@prod.google.com> 1709084736 -0800

dm: limit the number of targets and parameter size area

commit bd504bcfec41a503b32054da5472904b404341a4 upstream.

The kvmalloc function fails with a warning if the size is larger than
INT_MAX. The warning was triggered by a syscall testing robot.

In order to avoid the warning, this commit limits the number of targets to
1048576 and the size of the parameter area to 1073741824.

BUG=b/322958349
TEST=presubmit
RELEASE_NOTE=Fixed CVE-2024-23851 in the Linux kernel.

cos-patch: security-moderate
Change-Id: Ie22a90c2b54e8fceaa8929c4641aca3aa6bbbae6
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-on: https://cos-review.googlesource.com/c/third_party/kernel/+/65650
Reviewed-by: Michael Kochera <kochera@google.com>
Tested-by: Cusky Presubmit Bot <presubmit@cos-infra-prod.iam.gserviceaccount.com>
Main-Branch-Verified: Cusky Presubmit Bot <presubmit@cos-infra-prod.iam.gserviceaccount.com>