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Commit d40f6d71 authored by Jeff Dike's avatar Jeff Dike Committed by Linus Torvalds
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[PATCH] uml: fix device unplug crash 



Fix a NULL dereference when unplugging a device.  The default value of
err_msg wants to be "" in case the driver doesn't modify it.

Signed-off-by: default avatarJeff Dike <jdike@linux.intel.com>
Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 2a9529a0

arch/um/drivers/mconsole_kern.c

+3 −0
Original line number Diff line number Diff line
@@ -615,6 +615,9 @@ void mconsole_remove(struct mc_request *req) 
	err_msg = NULL;

	err = (*dev->remove)(n, &err_msg);

	switch(err){

	case 0:

		err_msg = "";

		break;

	case -ENODEV:

		if(err_msg == NULL)

			err_msg = "Device doesn't exist";