diff options
| author |   Jakub Kicinski <jakub.kicinski@netronome.com> | 2018-07-10 14:43:05 -0700 |
|---|---|---|
| committer |   Daniel Borkmann <daniel@iogearbox.net> | 2018-07-11 22:13:34 +0200 |
| commit | 531b014e7a2fedaeff0b19b2934d830cd4b35dc0 (patch) | |
| tree | 0de8355e9d533b4f6f90c3b389f58c992e75bb14 /tools/bpf/bpftool/xlated_dumper.c | |
| parent | tools: libbpf: move library error code into a separate file (diff) | |
| download | wireguard-linux-531b014e7a2fedaeff0b19b2934d830cd4b35dc0.tar.xz wireguard-linux-531b014e7a2fedaeff0b19b2934d830cd4b35dc0.zip | |
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/xlated_dumper.c')
| -rw-r--r-- | tools/bpf/bpftool/xlated_dumper.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/tools/bpf/bpftool/xlated_dumper.c b/tools/bpf/bpftool/xlated_dumper.c index b97f1da60dd1..3284759df98a 100644 --- a/tools/bpf/bpftool/xlated_dumper.c +++ b/tools/bpf/bpftool/xlated_dumper.c @@ -35,6 +35,7 @@ * POSSIBILITY OF SUCH DAMAGE. */ +#define _GNU_SOURCE #include <stdarg.h> #include <stdio.h> #include <stdlib.h> @@ -66,9 +67,8 @@ void kernel_syms_load(struct dump_data *dd) while (!feof(fp)) { if (!fgets(buff, sizeof(buff), fp)) break; - tmp = realloc(dd->sym_mapping, - (dd->sym_count + 1) * - sizeof(*dd->sym_mapping)); + tmp = reallocarray(dd->sym_mapping, dd->sym_count + 1, + sizeof(*dd->sym_mapping)); if (!tmp) { out: free(dd->sym_mapping); |