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-rw-r--r--libc/sysdeps/linux/common/getgroups.c6
-rw-r--r--libc/sysdeps/linux/common/setgroups.c13
2 files changed, 12 insertions, 7 deletions
diff --git a/libc/sysdeps/linux/common/getgroups.c b/libc/sysdeps/linux/common/getgroups.c
index 92cdca2d0..83d92627e 100644
--- a/libc/sysdeps/linux/common/getgroups.c
+++ b/libc/sysdeps/linux/common/getgroups.c
@@ -32,7 +32,7 @@ ret_error:
size = MIN(size, sysconf(_SC_NGROUPS_MAX));
kernel_groups = (__kernel_gid_t *)malloc(sizeof(*kernel_groups) * size);
- if (kernel_groups == NULL)
+ if (size && kernel_groups == NULL)
goto ret_error;
ngids = __syscall_getgroups(size, kernel_groups);
@@ -41,7 +41,9 @@ ret_error:
groups[i] = kernel_groups[i];
}
}
- free(kernel_groups);
+
+ if (kernel_groups)
+ free(kernel_groups);
return ngids;
}
}
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;
}
}