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| author | Prashant Malani <pmalani@chromium.org> | 2019-08-24 11:36:19 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2019-08-26 05:52:59 +0300 |
| commit | f53a7ad189594a112167efaf17ea8d0242b5ac00 (patch) | |
| tree | a6fb436fa2844b808f326a64e62ae315d9204b1d /kernel/bpf | |
| parent | 7177895154e6a35179d332f4a584d396c50d0612 (diff) | |
| download | linux-f53a7ad189594a112167efaf17ea8d0242b5ac00.tar.xz | |
r8152: Set memory to all 0xFFs on failed reg reads
get_registers() blindly copies the memory written to by the
usb_control_msg() call even if the underlying urb failed.
This could lead to junk register values being read by the driver, since
some indirect callers of get_registers() ignore the return values. One
example is:
ocp_read_dword() ignores the return value of generic_ocp_read(), which
calls get_registers().
So, emulate PCI "Master Abort" behavior by setting the buffer to all
0xFFs when usb_control_msg() fails.
This patch is copied from the r8152 driver (v2.12.0) published by
Realtek (www.realtek.com).
Signed-off-by: Prashant Malani <pmalani@chromium.org>
Acked-by: Hayes Wang <hayeswang@realtek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'kernel/bpf')
0 files changed, 0 insertions, 0 deletions