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authorJakub Kicinski <jakub.kicinski@netronome.com>2018-07-11 00:43:05 +0300
committerDaniel Borkmann <daniel@iogearbox.net>2018-07-11 23:13:34 +0300
commit531b014e7a2fedaeff0b19b2934d830cd4b35dc0 (patch)
tree0de8355e9d533b4f6f90c3b389f58c992e75bb14 /tools/bpf/bpftool/Makefile
parent8d13406c02f9c38f106416e1dbe0e68059b9f59a (diff)
downloadlinux-531b014e7a2fedaeff0b19b2934d830cd4b35dc0.tar.xz
tools: bpf: make use of reallocarray
reallocarray() is a safer variant of realloc which checks for multiplication overflow in case of array allocation. Since it's not available in Glibc < 2.26 import kernel's overflow.h and add a static inline implementation when needed. Use feature detection to probe for existence of reallocarray. Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com> Reviewed-by: Jiong Wang <jiong.wang@netronome.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Diffstat (limited to 'tools/bpf/bpftool/Makefile')
-rw-r--r--tools/bpf/bpftool/Makefile6
1 files changed, 5 insertions, 1 deletions
diff --git a/tools/bpf/bpftool/Makefile b/tools/bpf/bpftool/Makefile
index 0911b00b25cc..6c4830e18879 100644
--- a/tools/bpf/bpftool/Makefile
+++ b/tools/bpf/bpftool/Makefile
@@ -52,7 +52,7 @@ INSTALL ?= install
RM ?= rm -f
FEATURE_USER = .bpftool
-FEATURE_TESTS = libbfd disassembler-four-args
+FEATURE_TESTS = libbfd disassembler-four-args reallocarray
FEATURE_DISPLAY = libbfd disassembler-four-args
check_feat := 1
@@ -75,6 +75,10 @@ ifeq ($(feature-disassembler-four-args), 1)
CFLAGS += -DDISASM_FOUR_ARGS_SIGNATURE
endif
+ifeq ($(feature-reallocarray), 0)
+CFLAGS += -DCOMPAT_NEED_REALLOCARRAY
+endif
+
include $(wildcard $(OUTPUT)*.d)
all: $(OUTPUT)bpftool