Re: [PATCH] bpf: explicitly memset some bpf info structures declared on the stack

From: Yonghong Song
Date: Fri Mar 20 2020 - 14:34:50 EST




On 3/20/20 9:22 AM, Greg Kroah-Hartman wrote:
Trying to initialize a structure with "= {};" will not always clean out
all padding locations in a structure. So be explicit and call memset to
initialize everything for a number of bpf information structures that
are then copied from userspace, sometimes from smaller memory locations
than the size of the structure.

Reported-by: Daniel Borkmann <daniel@xxxxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

Acked-by: Yonghong Song <yhs@xxxxxx>