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| author | David S. Miller <davem@davemloft.net> | 2017-12-18 10:49:22 -0500 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-12-18 10:49:22 -0500 |
| commit | b36025b19a2301ba0cac05e6ffad5668013d2c77 (patch) | |
| tree | 2fff4e78df48f5d9af54b35d9aa4aa8dd1494188 /kernel | |
| parent | f870c1ff65a6d1f3a083f277280802ee09a5b44d (diff) | |
| parent | c1b08ebe5003ae291470cb6e26923628ab19606f (diff) | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf
Daniel Borkmann says:
====================
pull-request: bpf 2017-12-17
The following pull-request contains BPF updates for your *net* tree.
The main changes are:
1) Fix a corner case in generic XDP where we have non-linear skbs
but enough tailroom in the skb to not miss to linearizing there,
from Song.
2) Fix BPF JIT bugs in s390x and ppc64 to not recache skb data when
BPF context is not skb, from Daniel.
3) Fix a BPF JIT bug in sparc64 where recaching skb data after helper
call would use the wrong register for the skb, from Daniel.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/bpf/verifier.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c index d4593571c404..e39b01317b6f 100644 --- a/kernel/bpf/verifier.c +++ b/kernel/bpf/verifier.c @@ -1674,7 +1674,13 @@ static int check_call(struct bpf_verifier_env *env, int func_id, int insn_idx) return -EINVAL; } + /* With LD_ABS/IND some JITs save/restore skb from r1. */ changes_data = bpf_helper_changes_pkt_data(fn->func); + if (changes_data && fn->arg1_type != ARG_PTR_TO_CTX) { + verbose(env, "kernel subsystem misconfigured func %s#%d: r1 != ctx\n", + func_id_name(func_id), func_id); + return -EINVAL; + } memset(&meta, 0, sizeof(meta)); meta.pkt_access = fn->pkt_access; |