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glibc/SOURCES/glibc-rh2117712-6.patch

36 lines
1.2 KiB

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 ();