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Mon, 19 Dec 2022 23:26:54 -0800 (PST) From: Chih-En Lin To: Andrew Morton , Qi Zheng , David Hildenbrand , Matthew Wilcox , Christophe Leroy , John Hubbard , Nadav Amit Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, Steven Rostedt , Masami Hiramatsu , Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Mark Rutland , Alexander Shishkin , Jiri Olsa , Namhyung Kim , Yang Shi , Peter Xu , Zach O'Keefe , "Liam R . Howlett" , Alex Sierra , Xianting Tian , Colin Cross , Suren Baghdasaryan , Barry Song , Pasha Tatashin , Suleiman Souhlal , Brian Geffon , Yu Zhao , Tong Tiangen , Liu Shixin , Li kunyu , Anshuman Khandual , Vlastimil Babka , Hugh Dickins , Minchan Kim , Miaohe Lin , Gautam Menghani , Catalin Marinas , Mark Brown , Will Deacon , "Eric W . Biederman" , Thomas Gleixner , Sebastian Andrzej Siewior , Andy Lutomirski , Fenghua Yu , Barret Rhoden , Davidlohr Bueso , "Jason A . 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 X-Rspamd-Queue-Id: 948E51C000D X-Rspamd-Server: rspam09 X-Rspam-User: X-Stat-Signature: 164yazebucrznri9kueaawrdgoe95rrk X-HE-Tag: 1671521216-786041 X-HE-Meta: U2FsdGVkX1/ZaR1q70FhaNJGBE5gAYGronSUvIDvjhq6oT8kT3Z55pKGaWY/goTb5LJug2IG9MbVneAv0q04o/KvL4s3iKvk4uU0K7iMpNMgIFpjFcH1KDCmhsNPXpqfVBL6DaRLpJfZt3moeR4hiAmHj/LZIQqvCyTaS4nzOZZTHLgt07cLTrTkWT92HArhMtR/wUtFpMhezNnHYrb0+lUR9Ushf3Qy+1Ej5oIwRsOyZN9yZ43eSPycqHGn3VxvSnr/W3KlfwcpkliDUHVmGC18hiIxmDPg9S9/E0hezTmoTb+eN6qtDDEGTNH+fedBzOg/2Op87ro8+NI6wvGF529+i8ObeSD7mwz5OPiODbKKaNi0/ug3wM/iQnowQtSjQpb/DOG0vnf4KBlm2KLBdyR7XDKFFkYPfJNZFAVg/grN56S8OcR9Ja87LHFYJdPGTMqEgY2+mW8IJZxFlBOXVFiqeLPC7PSuctja8hvRBJF41QyPXjCGNXpn4n7pU1S1FWS261yXY7RpeK/gIF4VUhbFUzgby1sq0a+9Us+1nVzk49jT+P4yPfHvDovzlRywauShKuUN1KfyRTlOhSoAjOtB07UUfIl2qJjjVdxSBeIfcWUpwRyUNnIt/qwn0v05hQ+7s1Wvf5HpYRwew1b7arYeLNe0NeFtVQxL2Zs/Kp77yN2ls1/8hvqNi4Eb9pR8tcF2j8YWIhvh6KKO6SphFnGQI3UT8erPANvq5vHlJzjZjB+XgCLrIraPAsJ3Y7aSn/IqHXNssh2RRm3wn/ApqcAxI6lUYfzsj12KrhzwKOJpK4tgDX0I5eILhgdgH0/tBCgYb9d8IfXmBeaeO8sgg9q0w3973INjIJqShzJ1Kd3ylDJ7Xh6I5Lv4Cos0dipAJvWN46X4eIYKzVWJ6gVaJ9RMGlTr12Inwx2K2Tq5KRSOYxVQSeYnqYdcUJq6aF5+vKWXD56VSGSaeTSGVG7 tSsNOIkY zkDWn/aO3QdqgUIk4xfySTln4h6drN9MTKp+EpYbWSn1GMcckxYlp5UW2wUFzhPTMP/N7HNU6Gp/7eS5GNZhfbTlnUkmZ75E6YNsUZ1hi5tz/NDX5zMxTEtMp/BiwTPM6B66ci+RRu3nCT7fwThURqzQgP3iEOpTjblgZGICkVVXUcmxnJn/e49eJMaVzG3uKDCtRerKr+YLPE/bp+XGvLHiIModqookv/qNGLbqkCHS0cHA= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: 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