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From:   Kees Cook <keescook@chromium.org>
To:     Hyeonggon Yoo <42.hyeyoo@gmail.com>
Cc:     Kees Cook <keescook@chromium.org>,
        Vlastimil Babka <vbabka@suse.cz>,
        Christoph Lameter <cl@linux.com>,
        Pekka Enberg <penberg@kernel.org>,
        David Rientjes <rientjes@google.com>,
        Joonsoo Kim <iamjoonsoo.kim@lge.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        Roman Gushchin <roman.gushchin@linux.dev>, linux-mm@kvack.org,
        stable@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-hardening@vger.kernel.org
Subject: [PATCH] mm/slab_common: Restore passing "caller" for tracing
Date:   Fri,  4 Nov 2022 23:35:34 -0700
Message-Id: <20221105063529.never.818-kees@kernel.org>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Precedence: bulk

The "caller" argument was accidentally being ignored in a few places
that were recently refactored. Restore these "caller" arguments, instead
of _RET_IP_.

Cc: Hyeonggon Yoo <42.hyeyoo@gmail.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Roman Gushchin <roman.gushchin@linux.dev>
Cc: linux-mm@kvack.org
Fixes: 11e9734bcb6a ("mm/slab_common: unify NUMA and UMA version of tracepoints")
Cc: stable@vger.kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>
---
 mm/slab_common.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/mm/slab_common.c b/mm/slab_common.c
index 33b1886b06eb..0e614f9e7ed7 100644
--- a/mm/slab_common.c
+++ b/mm/slab_common.c
@@ -941,7 +941,7 @@ void *__do_kmalloc_node(size_t size, gfp_t flags, int node, unsigned long caller
 
 	if (unlikely(size > KMALLOC_MAX_CACHE_SIZE)) {
 		ret = __kmalloc_large_node(size, flags, node);
-		trace_kmalloc(_RET_IP_, ret, size,
+		trace_kmalloc(caller, ret, size,
 			      PAGE_SIZE << get_order(size), flags, node);
 		return ret;
 	}
@@ -953,7 +953,7 @@ void *__do_kmalloc_node(size_t size, gfp_t flags, int node, unsigned long caller
 
 	ret = __kmem_cache_alloc_node(s, flags, node, size, caller);
 	ret = kasan_kmalloc(s, ret, size, flags);
-	trace_kmalloc(_RET_IP_, ret, size, s->size, flags, node);
+	trace_kmalloc(caller, ret, size, s->size, flags, node);
 	return ret;
 }
 
-- 
2.34.1