bpftool: Check malloc return value in mount_bpffs_for_pin

Fix and add a missing NULL check for the prior malloc() call.

Fixes: 49a086c201a9 ("bpftool: implement prog load command")
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Reviewed-by: Quentin Monnet <quentin@isovalent.com>
Acked-by: Roman Gushchin <guro@fb.com>
Link: https://lore.kernel.org/bpf/20210715110609.29364-1-tklauser@distanz.ch

diff --git a/tools/bpf/bpftool/common.c b/tools/bpf/bpftool/common.c
index 1828bba19020d6cce0df684c8d1c3c4e9dc73cc5..dc6daa193557a9c6647a18ed363fafcfb7026b8a 100644 (file)
--- a/tools/bpf/bpftool/common.c
+++ b/tools/bpf/bpftool/common.c
@@ -222,6 +222,11 @@ int mount_bpffs_for_pin(const char *name)
        int err = 0;
 
        file = malloc(strlen(name) + 1);
+       if (!file) {
+               p_err("mem alloc failed");
+               return -1;
+       }
+
        strcpy(file, name);
        dir = dirname(file);