62 lines
2.6 KiB
Diff
62 lines
2.6 KiB
Diff
From 755e4a0da3035c128d18c9a8f7d2f61f29715323 Mon Sep 17 00:00:00 2001
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From: Martin Lau <kafai@fb.com>
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Date: Thu, 3 Jan 2019 23:36:22 +0000
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Subject: [PATCH 16/27] tests: fix prog_info initialization in
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bpf-obj_get_info_by_fd-prog*
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The sys_bpf(BPF_OBJ_GET_INFO_BY_FD, &bpf_prog_get_info_attr, ...) is
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called in a loop. The bpf_prog_get_info_attr.info object is in size 104
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but bpf_prog_get_info_attr.info_len is in size 168. Hence, if the prog
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is jited, the second iteration onwards will have nr_jited_ksyms == 1
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which is asking the kernel to fill the
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bpf_prog_get_info_attr.info.jited_ksyms and it is NULL.
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* tests/bpf-obj_get_info_by_fd.c (main): Clear memory beyond prog_info
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at the start of every iteration.
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Additional changes:
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tests-m32/bpf-obj_get_info_by_fd.c (copy of tests/bpf-obj_get_info_by_fd.c)
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tests-mx32/bpf-obj_get_info_by_fd.c (copy of tests/bpf-obj_get_info_by_fd.c)
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Co-Authored-by: Dmitry V. Levin <ldv@altlinux.org>
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---
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tests/bpf-obj_get_info_by_fd.c | 1 +
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1 file changed, 1 insertion(+)
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Index: strace-4.24/tests/bpf-obj_get_info_by_fd.c
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===================================================================
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--- strace-4.24.orig/tests/bpf-obj_get_info_by_fd.c 2019-03-10 05:38:07.889179571 +0100
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+++ strace-4.24/tests/bpf-obj_get_info_by_fd.c 2019-03-10 05:38:16.038097970 +0100
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@@ -345,6 +345,7 @@
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memset(prog_info, 0, PROG_INFO_SZ);
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for (unsigned int i = 0; i < 4; i++) {
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prog_info->jited_prog_len = 0;
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+ memset(prog_info + 1, 0, PROG_INFO_SZ - sizeof(*prog_info));
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switch (i) {
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case 1:
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prog_info->xlated_prog_insns =
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Index: strace-4.24/tests-m32/bpf-obj_get_info_by_fd.c
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===================================================================
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--- strace-4.24.orig/tests-m32/bpf-obj_get_info_by_fd.c 2019-03-10 05:35:43.934621086 +0100
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+++ strace-4.24/tests-m32/bpf-obj_get_info_by_fd.c 2019-03-10 05:38:32.161936511 +0100
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@@ -345,6 +345,7 @@
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memset(prog_info, 0, PROG_INFO_SZ);
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for (unsigned int i = 0; i < 4; i++) {
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prog_info->jited_prog_len = 0;
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+ memset(prog_info + 1, 0, PROG_INFO_SZ - sizeof(*prog_info));
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switch (i) {
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case 1:
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prog_info->xlated_prog_insns =
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Index: strace-4.24/tests-mx32/bpf-obj_get_info_by_fd.c
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===================================================================
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--- strace-4.24.orig/tests-mx32/bpf-obj_get_info_by_fd.c 2019-03-10 05:38:12.854129853 +0100
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+++ strace-4.24/tests-mx32/bpf-obj_get_info_by_fd.c 2019-03-10 05:38:29.561962546 +0100
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@@ -345,6 +345,7 @@
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memset(prog_info, 0, PROG_INFO_SZ);
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for (unsigned int i = 0; i < 4; i++) {
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prog_info->jited_prog_len = 0;
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+ memset(prog_info + 1, 0, PROG_INFO_SZ - sizeof(*prog_info));
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switch (i) {
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case 1:
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prog_info->xlated_prog_insns =
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