Daniel Borkmann 04514d1322 bpf: guarantee r1 to be ctx in case of bpf_helper_changes_pkt_data ... Some JITs don't cache skb context on stack in prologue, so when LD_ABS/IND is used and helper calls yield bpf_helper_changes_pkt_data() as true, then they temporarily save/restore skb pointer. However, the assumption that skb always has to be in r1 is a bit of a gamble. Right now it turned out to be true for all helpers listed in bpf_helper_changes_pkt_data(), but lets enforce that from verifier side, so that we make this a guarantee and bail out if the func proto is misconfigured in future helpers. In case of BPF helper calls from cBPF, bpf_helper_changes_pkt_data() is completely unrelevant here (since cBPF is context read-only) and therefore always false. Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org>		2017-12-15 09:19:35 -08:00
..
arraymap.c	perf/bpf: Extend the perf_event_read_local() interface, a.k.a. "bpf: perf event change needed for subsequent bpf helpers"	2017-10-27 10:31:56 +02:00
bpf_lru_list.c	bpf: lru: Lower the PERCPU_NR_SCANS from 16 to 4	2017-04-17 13:55:52 -04:00
bpf_lru_list.h	bpf: Only set node->ref = 1 if it has not been set	2017-09-01 09:57:39 -07:00
cgroup.c	bpf, cgroup: implement eBPF-based device controller for cgroup v2	2017-11-05 23:26:51 +09:00
core.c	bpf: set maximum number of attached progs to 64 for a single perf tp	2017-12-01 02:56:10 +01:00
cpumap.c	bpf: cpumap micro-optimization in cpu_map_enqueue	2017-11-02 16:13:14 +09:00
devmap.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-10-22 13:39:14 +01:00
disasm.c	bpf: move instruction printing into a separate file	2017-10-10 12:30:16 -07:00
disasm.h	bpf: move instruction printing into a separate file	2017-10-10 12:30:16 -07:00
hashtab.c	bpf: add schedule points to map alloc/free	2017-12-12 15:27:22 -08:00
helpers.c	bpf: rename ARG_PTR_TO_STACK	2017-01-09 16:56:27 -05:00
inode.c	bpf: Add file mode configuration into bpf maps	2017-10-20 13:32:59 +01:00
lpm_trie.c	bpf: Add file mode configuration into bpf maps	2017-10-20 13:32:59 +01:00
Makefile	bpf: offload: add infrastructure for loading programs for a specific netdev	2017-11-05 22:26:18 +09:00
map_in_map.c	bpf: Add syscall lookup support for fd array and htab	2017-06-29 13:13:25 -04:00
map_in_map.h	bpf: Add syscall lookup support for fd array and htab	2017-06-29 13:13:25 -04:00
offload.c	bpf: offload: add a license header	2017-11-27 22:24:51 +01:00
percpu_freelist.c	bpf: fix lockdep splat	2017-11-15 19:46:32 +09:00
percpu_freelist.h	bpf: introduce percpu_freelist	2016-03-08 15:28:31 -05:00
sockmap.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-11-02 15:23:39 +09:00
stackmap.c	bpf: Add file mode configuration into bpf maps	2017-10-20 13:32:59 +01:00
syscall.c	bpf: revert report offload info to user space	2017-11-21 00:37:35 +01:00
tnum.c	bpf/verifier: track signed and unsigned min/max values	2017-08-08 17:51:34 -07:00
verifier.c	bpf: guarantee r1 to be ctx in case of bpf_helper_changes_pkt_data	2017-12-15 09:19:35 -08:00