Michal Kubecek
fac2c93374
Commit 11c5ad0ec441 ("eventpoll: switch to ->poll_mask") in v4.18-rc1, made
eventpoll switch from ->poll() to ->poll_mask(), resulting in a null
pointer dereference as vmmon calls the callback directly without checking
its availability.
Rather than calling the callback directly (which would result in null
pointer dereference), use vfs_poll() wrapper. As this wrapper is only
available since 4.18-rc1 cycle as well, provide a copy to use when building
against older kernels.
Note: even if the commit revealing the problem was reverted in 4.18-rc3
(and is unlikely to go back in the same form) so that vmmon no longer
crashes with 4.18 kernel, calling the callback without a check is a bad
practice so let's keep the patch in place.
This files in this directory and its subdirectories are the kernel module
portion of the VMware Virtual Machine Monitor. In order to build, make
certain the Makefile is correct, especially in whether or not your system
is multi-processor and then just type
make
from this directory. A copy of the module will be left in
driver-<kernel version>/vmmon.o
(e.g. driver-up-2.0.32/vmmon.o).
If you have any problems or questions, send mail to support@vmware.com