From: Alexei Starovoitov <ast@kernel.org>

Disallow kprobes in ___slab_alloc() to prevent reentrance:
kmalloc() -> ___slab_alloc() -> local_lock_irqsave() ->
kprobe -> bpf -> kmalloc_nolock().

Signed-off-by: Alexei Starovoitov <ast@kernel.org>
---
 mm/slub.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/mm/slub.c b/mm/slub.c
index c995f3bec69d..922d47b10c2f 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -45,7 +45,7 @@
 #include <kunit/test-bug.h>
 #include <linux/sort.h>
 #include <linux/irq_work.h>
-
+#include <linux/kprobes.h>
 #include <linux/debugfs.h>
 #include <trace/events/kmem.h>
 
@@ -4697,6 +4697,7 @@ static void *___slab_alloc(struct kmem_cache *s, gfp_t gfpflags, int node,
 
 	goto load_freelist;
 }
+NOKPROBE_SYMBOL(___slab_alloc);
 
 /*
  * A wrapper for ___slab_alloc() for contexts where preemption is not yet
-- 
2.47.3