commit d561d929d64dccbda5a4b7be3956ce7894bd1a31
from: Ilya Verbin <iverbin@tarantool.org>
date: Wed Oct 16 13:58:07 2024 UTC

box: fix SIGSEGV on unaligned access to `struct applier`

All structures with a non-default alignment (set by `alignas()`) must be
allocated by `aligned_alloc()`, otherwise an access to such a structure
member fill crash, e.g. if compiled with AVX-512 support.

See also commit a60ec82d4f07 ("box: fix SIGSEGV on unaligned access to a
struct with extended alignment").

Closes #10699

NO_DOC=bugfix
NO_CHANGELOG=minor
NO_TEST=tested by debug_asan_clang workflow

commit - 11145f6a82b1753e81baf8a439b29962dfef4221
commit + d561d929d64dccbda5a4b7be3956ce7894bd1a31
blob - bf9e093c4ef0bb67adfe1145767c3d852b0cb6ad
blob + e5a2a20840c5a4c19e9323ead60295f6248828f7
--- src/box/applier.cc
+++ src/box/applier.cc
@@ -2767,8 +2767,8 @@ applier_kill(struct applier *applier, struct error *e)
 struct applier *
 applier_new(const struct uri *uri)
 {
-	struct applier *applier = (struct applier *)
-		xcalloc(1, sizeof(struct applier));
+	struct applier *applier = xalloc_object(struct applier);
+	memset(applier, 0, sizeof(*applier));
 	if (iostream_ctx_create(&applier->io_ctx, IOSTREAM_CLIENT, uri) != 0) {
 		free(applier);
 		diag_raise();