1 files changed, 13 insertions, 2 deletions
diff --git a/signal/sigaction.c b/signal/sigaction.c
index 811062a..c2931b8 100644
--- a/signal/sigaction.c
+++ b/signal/sigaction.c
@@ -16,8 +16,9 @@
    <https://www.gnu.org/licenses/>.  */
 
 #include <errno.h>
-#include <signal.h>
 #include <internal-signals.h>
+#include <libc-lock.h>
+#include <signal.h>
 
 /* If ACT is not NULL, change the action for SIG to *ACT.
    If OACT is not NULL, put the old action for SIG in *OACT.  */
@@ -30,7 +31,17 @@ __sigaction (int sig, const struct sigaction *act, struct sigaction *oact)
       return -1;
     }
 
-  return __libc_sigaction (sig, act, oact);
+  internal_sigset_t set;
+
+  if (sig == SIGABRT)
+    __abort_lock_lock (&set);
+
+  int r = __libc_sigaction (sig, act, oact);
+
+  if (sig == SIGABRT)
+    __abort_lock_unlock (&set);
+
+  return r;
 }
 libc_hidden_def (__sigaction)
 weak_alias (__sigaction, sigaction)