linux/kernel/bpf
Alexei Starovoitov 19de99f70b bpf: fix matching of data/data_end in verifier
The ctx structure passed into bpf programs is different depending on bpf
program type. The verifier incorrectly marked ctx->data and ctx->data_end
access based on ctx offset only. That caused loads in tracing programs
int bpf_prog(struct pt_regs *ctx) { .. ctx->ax .. }
to be incorrectly marked as PTR_TO_PACKET which later caused verifier
to reject the program that was actually valid in tracing context.
Fix this by doing program type specific matching of ctx offsets.

Fixes: 969bf05eb3 ("bpf: direct packet access")
Reported-by: Sasha Goldshtein <goldshtn@gmail.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-06-15 23:37:54 -07:00
..
arraymap.c bpf: check for reserved flag bits in array and stack maps 2016-03-08 15:28:31 -05:00
core.c bpf: rather use get_random_int for randomizations 2016-05-20 11:18:21 -07:00
hashtab.c bpf: pre-allocate hash map elements 2016-03-08 15:28:31 -05:00
helpers.c bpf: convert relevant helper args to ARG_PTR_TO_RAW_STACK 2016-04-14 21:40:41 -04:00
inode.c bpf, inode: disallow userns mounts 2016-05-23 15:08:26 -07:00
Makefile bpf: introduce percpu_freelist 2016-03-08 15:28:31 -05:00
percpu_freelist.c bpf: introduce percpu_freelist 2016-03-08 15:28:31 -05:00
percpu_freelist.h bpf: introduce percpu_freelist 2016-03-08 15:28:31 -05:00
stackmap.c Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2016-05-25 17:05:40 -07:00
syscall.c bpf: prepare bpf_int_jit_compile/bpf_prog_select_runtime apis 2016-05-16 13:49:32 -04:00
verifier.c bpf: fix matching of data/data_end in verifier 2016-06-15 23:37:54 -07:00