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Commit b4aaa78f authored by Dan Rosenberg's avatar Dan Rosenberg Committed by Florian Tobias Schandinat
Browse files

drivers/video/via/ioctl.c: prevent reading uninitialized stack memory 



The VIAFB_GET_INFO device ioctl allows unprivileged users to read 246
bytes of uninitialized stack memory, because the "reserved" member of
the viafb_ioctl_info struct declared on the stack is not altered or
zeroed before being copied back to the user.  This patch takes care of
it.

Signed-off-by: default avatarDan Rosenberg <dan.j.rosenberg@gmail.com>
Signed-off-by: default avatarFlorian Tobias Schandinat <FlorianSchandinat@gmx.de>
parent f2709837

drivers/video/via/ioctl.c

+2 −0
Original line number Diff line number Diff line
@@ -25,6 +25,8 @@ int viafb_ioctl_get_viafb_info(u_long arg) 
{

	struct viafb_ioctl_info viainfo;



	memset(&viainfo, 0, sizeof(struct viafb_ioctl_info));



	viainfo.viafb_id = VIAID;

	viainfo.vendor_id = PCI_VIA_VENDOR_ID;