Daniel Borkmann c4675f9353 ebpf: remove self-assignment in interpreter's tail call ...

ARG1 = BPF_R1 as it stands, evaluates to regs[BPF_REG_1] = regs[BPF_REG_1]
and thus has no effect. Add a comment instead, explaining what happens and
why it's okay to just remove it. Since from user space side, a tail call is
invoked as a pseudo helper function via bpf_tail_call_proto, the verifier
checks the arguments just like with any other helper function and makes
sure that the first argument (regs[BPF_REG_1])'s type is ARG_PTR_TO_CTX.

Signed-off-by: Daniel Borkmann <[email protected]>
Acked-by: Alexei Starovoitov <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

2015-07-13 13:11:41 -07:00

..

arraymap.c

bpf: add missing rcu protection when releasing programs from prog_array

2015-05-31 00:27:51 -07:00

core.c

ebpf: remove self-assignment in interpreter's tail call

2015-07-13 13:11:41 -07:00

hashtab.c

ebpf: constify various function pointer structs

2015-03-01 14:05:18 -05:00

helpers.c

bpf: introduce current->pid, tgid, uid, gid, comm accessors

2015-06-15 15:53:50 -07:00

Makefile

ebpf: remove kernel test stubs

2015-03-01 14:05:18 -05:00

syscall.c

bpf: add missing rcu protection when releasing programs from prog_array

2015-05-31 00:27:51 -07:00

verifier.c

bpf: allow programs to write to certain skb fields

2015-06-07 02:01:33 -07:00