From: syzbot <syzbot+e34177f6091df113ef20@syzkaller.appspotmail.com>
To: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com
Subject: Forwarded: Re: [syzbot] [kernel?] KASAN: slab-out-of-bounds Read in change_page_attr_set_clr
Date: Fri, 12 Sep 2025 22:13:11 -0700 [thread overview]
Message-ID: <68c4fd67.050a0220.3c6139.04c0.GAE@google.com> (raw)
In-Reply-To: <68b87c9f.050a0220.3db4df.01fa.GAE@google.com>
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Subject: Re: [syzbot] [kernel?] KASAN: slab-out-of-bounds Read in change_page_attr_set_clr
Author: chandna.linuxkernel@gmail.com
#syz test
--- a/arch/x86/mm/pat/set_memory.c
+++ b/arch/x86/mm/pat/set_memory.c
@@ -305,6 +305,9 @@ static inline unsigned long fix_addr(unsigned long addr)
static unsigned long __cpa_addr(struct cpa_data *cpa, unsigned long idx)
{
+ if (WARN_ON_ONCE(!cpa->pages || !cpa->pages[idx]))
+ return 0;
+
if (cpa->flags & CPA_PAGES_ARRAY) {
struct page *page = cpa->pages[idx];
--
2.51.0
next prev parent reply other threads:[~2025-09-13 5:13 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-09-03 17:36 syzbot
2025-09-13 5:13 ` syzbot [this message]
2025-09-13 7:36 ` Forwarded: [PATCH] x86/mm/pat: fix oob error syzbot
2025-09-29 7:50 ` Forwarded: syzbot
2025-10-20 9:16 ` [syzbot] [kernel?] KASAN: slab-out-of-bounds Read in change_page_attr_set_clr syzbot
2025-10-20 23:21 ` Dave Hansen
2025-11-19 21:32 ` syzbot
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