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bpf, samples: Use bpf_probe_read_user where appropriate 

Use bpf_probe_read_user() helper instead of bpf_probe_read() for samples that
attach to kprobes probing on user addresses.

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Link: https://lore.kernel.org/bpf/5b0144b3f8e031ec5e2438bd7de8d7877e63bf2f.1572649915.git.daniel@iogearbox.net
This commit is contained in:
Daniel Borkmann 2019-11-02 00:18:01 +01:00 committed by Alexei Starovoitov
parent 6e07a63412
commit 251e2d337a
3 changed files with 5 additions and 5 deletions
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4
samples/bpf/map_perf_test_kern.c
View File

@ -181,8 +181,8 @@ int stress_lru_hmap_alloc(struct pt_regs *ctx)
if (addrlen != sizeof(*in6))
return 0;
ret = bpf_probe_read(test_params.dst6, sizeof(test_params.dst6),
&in6->sin6_addr);
ret = bpf_probe_read_user(test_params.dst6, sizeof(test_params.dst6),
&in6->sin6_addr);
if (ret)
goto done;

4
samples/bpf/test_map_in_map_kern.c
View File

@ -118,7 +118,7 @@ int trace_sys_connect(struct pt_regs *ctx)
if (addrlen != sizeof(*in6))
return 0;
ret = bpf_probe_read(dst6, sizeof(dst6), &in6->sin6_addr);
ret = bpf_probe_read_user(dst6, sizeof(dst6), &in6->sin6_addr);
if (ret) {
inline_ret = ret;
goto done;
@ -129,7 +129,7 @@ int trace_sys_connect(struct pt_regs *ctx)
test_case = dst6[7];
ret = bpf_probe_read(&port, sizeof(port), &in6->sin6_port);
ret = bpf_probe_read_user(&port, sizeof(port), &in6->sin6_port);
if (ret) {
inline_ret = ret;
goto done;

2
samples/bpf/test_probe_write_user_kern.c
View File

@ -37,7 +37,7 @@ int bpf_prog1(struct pt_regs *ctx)
if (sockaddr_len > sizeof(orig_addr))
return 0;
if (bpf_probe_read(&orig_addr, sizeof(orig_addr), sockaddr_arg) != 0)
if (bpf_probe_read_user(&orig_addr, sizeof(orig_addr), sockaddr_arg) != 0)
return 0;
mapped_addr = bpf_map_lookup_elem(&dnat_map, &orig_addr);