tree 6c6cc90ce09e7abfe81f2378f7adaa302c079227
parent fd07a62d58c16b1fdd46f4099791c5bd242908c3
author Daniel Borkmann <daniel@iogearbox.net> 1502974780 +0200
committer David S. Miller <davem@davemloft.net> 1502990120 -0700

bpf: fix liveness propagation to parent in spilled stack slots

Using parent->regs[] when propagating REG_LIVE_READ for spilled regs
doesn't work since parent->regs[] denote the set of normal registers
but not spilled ones. Propagate to the correct regs.

Fixes: dc503a8ad984 ("bpf/verifier: track liveness for pruning")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>