tree 78fe75485a921e80252184d52613280cef5e9dbd
parent d66fd908acc8ba88541ecc570d89b0243f947c5e
author Kristen Accardi <kristen.c.accardi@intel.com> 1148162408 -0700
committer Linus Torvalds <torvalds@g5.osdl.org> 1148241558 -0700

[PATCH] pci: correctly allocate return buffers for osc calls

The OSC set and query functions do not allocate enough space for return
values, and set the output buffer length to a false, too large value.  This
causes the acpi-ca code to assume that the output buffer is larger than it
actually is, and overwrite memory when copying acpi return buffers into
this caller provided buffer.  In some cases this can cause kernel oops if
the memory that is overwritten is a pointer.  This patch will change these
calls to use a dynamically allocated output buffer, thus allowing the
acpi-ca code to decide how much space is needed.

Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com>
Cc: "Brown, Len" <len.brown@intel.com>
Cc: "Yu, Luming" <luming.yu@intel.com>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>