[PATCH v2] __cxa_thread_atexit_impl: Abort on allocation failure [BZ #18524]

[PATCH v2] __cxa_thread_atexit_impl: Abort on allocation failure [BZ #18524]

[Siddhesh Poyarekar via Libc-alpha]

Abort in the unlikely event that allocation fails when trying to
register a TLS destructor.
---
 stdlib/cxa_thread_atexit_impl.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/stdlib/cxa_thread_atexit_impl.c b/stdlib/cxa_thread_atexit_impl.c
index 577ed30931..d789f043f2 100644
--- a/stdlib/cxa_thread_atexit_impl.c
+++ b/stdlib/cxa_thread_atexit_impl.c
@@ -72,6 +72,7 @@
    is not very different from a case where __call_tls_dtors is called after
    _dl_close_worker on the DSO and hence is an accepted execution.  */
 
+#include <stdio.h>
 #include <stdlib.h>
 #include <ldsodefs.h>
 
@@ -104,6 +105,8 @@ __cxa_thread_atexit_impl (dtor_func func, void *obj, void *dso_symbol)
 
   /* Prepend.  */
   struct dtor_list *new = calloc (1, sizeof (struct dtor_list));
+  if (__glibc_unlikely (new == NULL))
+    __libc_fatal ("failed to register TLS destructor: out of memory");
   new->func = func;
   new->obj = obj;
   new->next = tls_dtor_list;
-- 
2.31.1

Re: [PATCH v2] __cxa_thread_atexit_impl: Abort on allocation failure [BZ #18524]

[Florian Weimer via Libc-alpha]

* Siddhesh Poyarekar:

> @@ -104,6 +105,8 @@ __cxa_thread_atexit_impl (dtor_func func, void *obj, void *dso_symbol)
>  
>    /* Prepend.  */
>    struct dtor_list *new = calloc (1, sizeof (struct dtor_list));
> +  if (__glibc_unlikely (new == NULL))
> +    __libc_fatal ("failed to register TLS destructor: out of memory");
>    new->func = func;
>    new->obj = obj;
>    new->next = tls_dtor_list;

Please add "Fatal glibc error: " and "\n".

Thanks,
Florian