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/322957905
TEST=presubmit
RELEASE_NOTE=Fixed CVE-2024-23851 in the Linux kernel.

Change-Id: I10e54d17233270701281d0d37eaf2b854bab7889
Signed-off-by: Mikulas Patocka <[email protected]>
Signed-off-by: Mike Snitzer <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
Reviewed-on: https://cos-review.googlesource.com/c/third_party/kernel/+/65690
Tested-by: Cusky Presubmit Bot <[email protected]>
Reviewed-by: Michael Kochera <[email protected]>

• drivers/md/dm-core.h[diff]
• drivers/md/dm-ioctl.c[diff]
• drivers/md/dm-table.c[diff]