]> git.proxmox.com Git - mirror_ubuntu-eoan-kernel.git/commit
bpf: sanitize bpf tracepoint access
authorAlexei Starovoitov <ast@fb.com>
Thu, 7 Apr 2016 01:43:28 +0000 (18:43 -0700)
committerDavid S. Miller <davem@davemloft.net>
Fri, 8 Apr 2016 01:04:26 +0000 (21:04 -0400)
commit32bbe0078afe86a8bf4c67c6b3477781b15e94dc
tree8c5290f51108de3a2c98cb7171942fb9d5e36ab2
parent9940d67c93b5bb7ddcf862b41b1847cb728186c4
bpf: sanitize bpf tracepoint access

during bpf program loading remember the last byte of ctx access
and at the time of attaching the program to tracepoint check that
the program doesn't access bytes beyond defined in tracepoint fields

This also disallows access to __dynamic_array fields, but can be
relaxed in the future.

Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
include/linux/bpf.h
include/linux/trace_events.h
kernel/bpf/verifier.c
kernel/events/core.c
kernel/trace/trace_events.c