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path: root/libc/sysdeps/linux/common/setgroups.c
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Diffstat (limited to 'libc/sysdeps/linux/common/setgroups.c')
-rw-r--r--libc/sysdeps/linux/common/setgroups.c13
1 files changed, 8 insertions, 5 deletions
diff --git a/libc/sysdeps/linux/common/setgroups.c b/libc/sysdeps/linux/common/setgroups.c
index 3d2102f9d..49d85156f 100644
--- a/libc/sysdeps/linux/common/setgroups.c
+++ b/libc/sysdeps/linux/common/setgroups.c
@@ -26,11 +26,13 @@ ret_error:
return -1;
} else {
size_t i;
- __kernel_gid_t *kernel_groups;
+ __kernel_gid_t *kernel_groups = NULL;
- kernel_groups = (__kernel_gid_t *)malloc(sizeof(*kernel_groups) * size);
- if (kernel_groups == NULL)
- goto ret_error;
+ if (size) {
+ kernel_groups = (__kernel_gid_t *)malloc(sizeof(*kernel_groups) * size);
+ if (kernel_groups == NULL)
+ goto ret_error;
+ }
for (i = 0; i < size; i++) {
kernel_groups[i] = (groups)[i];
@@ -40,7 +42,8 @@ ret_error:
}
i = __syscall_setgroups(size, kernel_groups);
- free(kernel_groups);
+ if (kernel_groups)
+ free(kernel_groups);
return i;
}
}