commit 7187efd0aa270c83c428ea6cd0e1cffc34b41a74

Author: Florian Weimer <fweimer@redhat.com>

Date:   Mon Aug 1 15:49:07 2022 +0200

    malloc: Use __getrandom_nocancel during tcache initiailization

    Cancellation currently cannot happen at this point because dlopen

    as used by the unwind link always performs additional allocations

    for libgcc_s.so.1, even if it has been loaded already as a dependency

    of the main executable.  But it seems prudent not to rely on this

    quirk.

    Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>

diff --git a/malloc/malloc.c b/malloc/malloc.c

index 2edb469d5dbf1203..375f50f5db13e234 100644

--- a/malloc/malloc.c

+++ b/malloc/malloc.c

@@ -256,6 +256,7 @@

 /* For tcache double-free check.  */

 #include <random-bits.h>

 #include <sys/random.h>

+#include <not-cancel.h>

 /*

   Debugging:

@@ -3025,7 +3026,7 @@ static uintptr_t tcache_key;

 static void

 tcache_key_initialize (void)

 {

-  if (__getrandom (&tcache_key, sizeof(tcache_key), GRND_NONBLOCK)

+  if (__getrandom_nocancel (&tcache_key, sizeof(tcache_key), GRND_NONBLOCK)

       != sizeof (tcache_key))

     {

       tcache_key = random_bits ();