+ kasan-simplify-kasan_poison_kfree-temp-fix.patch added to -mm tree

+ kasan-simplify-kasan_poison_kfree-temp-fix.patch added to -mm tree

[akpm]

The patch titled
     Subject: kasan-simplify-kasan_poison_kfree-temp-fix
has been added to the -mm tree.  Its filename is
     kasan-simplify-kasan_poison_kfree-temp-fix.patch

This patch should soon appear at
    https://ozlabs.org/~akpm/mmots/broken-out/kasan-simplify-kasan_poison_kfree-temp-fix.patch
and later at
    https://ozlabs.org/~akpm/mmotm/broken-out/kasan-simplify-kasan_poison_kfree-temp-fix.patch

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The -mm tree is included into linux-next and is updated
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------------------------------------------------------
From: Lorenzo Stoakes <lstoakes@gmail.com>
Subject: kasan-simplify-kasan_poison_kfree-temp-fix

temp workaround for a ceph-related oops

Link: https://lkml.kernel.org/r/CAA5enKY8mBicpc7kZKKLG5LeVFhVJtRQ73MYVFM0Az2bbiGv8g@mail.gmail.com
Reported-by: syzbot+2d6f3dad1a42d86a5801@syzkaller.appspotmail.com
Cc: Andrey Konovalov <andreyknvl@google.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Qian Cai <cai@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/kasan/common.c |    5 +++++
 1 file changed, 5 insertions(+)

--- a/mm/kasan/common.c~kasan-simplify-kasan_poison_kfree-temp-fix
+++ a/mm/kasan/common.c
@@ -439,6 +439,11 @@ void __kasan_poison_kfree(void *ptr, uns
 	struct page *page;
 
 	page = virt_to_head_page(ptr);
+
+	if (!PageSlab(page)) {
+		return;
+	}
+
 	____kasan_slab_free(page->slab_cache, ptr, ip, false);
 }
 
_

Patches currently in -mm which might be from lstoakes@gmail.com are

kasan-simplify-kasan_poison_kfree-temp-fix.patch