commit 68ee0f704cb81e9ad0a78c644a83e1e9cd2ee578
Author: Siddhesh Poyarekar <siddhesh@sourceware.org>
Date:   Tue Jan 21 16:11:06 2025 -0500

    Fix underallocation of abort_msg_s struct (CVE-2025-0395)
    
    Include the space needed to store the length of the message itself, in
    addition to the message string.  This resolves BZ #32582.
    
    Signed-off-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
    Reviewed: Adhemerval Zanella  <adhemerval.zanella@linaro.org>

Conflicts:
	sysdeps/posix/libc_fatal.c: Adjust for skipped upstream commit:
	cca9684f2d7a74fc0b28bfb1859955e0e28d7b4b
	(stdio: Clean up __libc_message after unconditional abort)

diff --git a/assert/assert.c b/assert/assert.c
index 8ed691bd323c876a..f81d751cdab5ff92 100644
--- a/assert/assert.c
+++ b/assert/assert.c
@@ -18,6 +18,7 @@
 #include <assert.h>
 #include <atomic.h>
 #include <ldsodefs.h>
+#include <libc-pointer-arith.h>
 #include <libintl.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -64,7 +65,8 @@ __assert_fail_base (const char *fmt, const char *assertion, const char *file,
       (void) __fxprintf (NULL, "%s", str);
       (void) fflush (stderr);
 
-      total = (total + 1 + GLRO(dl_pagesize) - 1) & ~(GLRO(dl_pagesize) - 1);
+      total = ALIGN_UP (total + sizeof (struct abort_msg_s) + 1,
+			GLRO(dl_pagesize));
       struct abort_msg_s *buf = __mmap (NULL, total, PROT_READ | PROT_WRITE,
 					MAP_ANON | MAP_PRIVATE, -1, 0);
       if (__glibc_likely (buf != MAP_FAILED))
diff --git a/sysdeps/posix/libc_fatal.c b/sysdeps/posix/libc_fatal.c
index 89a20080e16558b5..89d5782a44e251a8 100644
--- a/sysdeps/posix/libc_fatal.c
+++ b/sysdeps/posix/libc_fatal.c
@@ -20,6 +20,7 @@
 #include <errno.h>
 #include <fcntl.h>
 #include <ldsodefs.h>
+#include <libc-pointer-arith.h>
 #include <paths.h>
 #include <stdarg.h>
 #include <stdbool.h>
@@ -147,8 +148,8 @@ __libc_message (enum __libc_message_action action, const char *fmt, ...)
 
       if ((action & do_abort))
 	{
-	  total = ((total + 1 + GLRO(dl_pagesize) - 1)
-		   & ~(GLRO(dl_pagesize) - 1));
+	  total = ALIGN_UP (total + sizeof (struct abort_msg_s) + 1,
+			    GLRO(dl_pagesize));
 	  struct abort_msg_s *buf = __mmap (NULL, total,
 					    PROT_READ | PROT_WRITE,
 					    MAP_ANON | MAP_PRIVATE, -1, 0);