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Message-ID: <68da3a62.a00a0220.102ee.0037.GAE@google.com> Date: Mon, 29 Sep 2025 00:50:58 -0700 From: syzbot <syzbot+e34177f6091df113ef20@...kaller.appspotmail.com> To: linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com Subject: Forwarded: For archival purposes, forwarding an incoming command email to linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com. *** Subject: Author: nooraineqbal@...il.com #syz test: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master Resending this patch in the existing thread with a '#syz test:' directive so syzbot can test it. >From 1bb35c6722b8fb03e9262f6e6530d240629a44df Mon Sep 17 00:00:00 2001 From: neqbal <nooraineqbal@...il.com> Date: Sun, 28 Sep 2025 03:52:44 +0530 Subject: [PATCH] x86/mm: Fix off-by-one error in set_memory Correct end page calculation by subtracting 1 to prevent out-of-bounds access. Reported-by: syzbot+e34177f6091df113ef20@...kaller.appspotmail.com Signed-off-by: neqbal <nooraineqbal@...il.com> --- arch/x86/mm/pat/set_memory.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/mm/pat/set_memory.c b/arch/x86/mm/pat/set_memory.c index d2d54b8c4dbb..daefc96403f1 100644 --- a/arch/x86/mm/pat/set_memory.c +++ b/arch/x86/mm/pat/set_memory.c @@ -446,7 +446,7 @@ static void cpa_flush(struct cpa_data *cpa, int cache) } start = fix_addr(__cpa_addr(cpa, 0)); - end = fix_addr(__cpa_addr(cpa, cpa->numpages)); + end = fix_addr(__cpa_addr(cpa, cpa->numpages - 1)); if (cpa->force_flush_all) end = TLB_FLUSH_ALL; -- 2.51.0
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