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Donenfeld" , Dinglan Peng , Pedro Fonseca , Jim Huang , Huichun Feng , Chih-En Lin Subject: [PATCH v3 13/14] events/uprobes: Break COW PTE before replacing page Date: Tue, 20 Dec 2022 15:27:42 +0800 Message-Id: <20221220072743.3039060-14-shiyn.lin@gmail.com> X-Mailer: git-send-email 2.37.3 In-Reply-To: <20221220072743.3039060-1-shiyn.lin@gmail.com> References: <20221220072743.3039060-1-shiyn.lin@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Break COW PTE if we want to replace the page which resides in COW-ed PTE. Signed-off-by: Chih-En Lin --- kernel/events/uprobes.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/events/uprobes.c b/kernel/events/uprobes.c index d9e357b7e17c9..2956a53da01a1 100644 --- a/kernel/events/uprobes.c +++ b/kernel/events/uprobes.c @@ -157,7 +157,7 @@ static int __replace_page(struct vm_area_struct *vma, unsigned long addr, struct folio *old_folio = page_folio(old_page); struct folio *new_folio; struct mm_struct *mm = vma->vm_mm; - DEFINE_FOLIO_VMA_WALK(pvmw, old_folio, vma, addr, 0); + DEFINE_FOLIO_VMA_WALK(pvmw, old_folio, vma, addr, PVMW_BREAK_COW_PTE); int err; struct mmu_notifier_range range; -- 2.37.3