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Fri, 12 Jul 2024 14:18:03 +0200 From: Bert Karwatzki To: Pei Li Cc: Bert Karwatzki , Andrew Morton , Shuah Khan , David Hildenbrand , linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-next@vger.kernel.org, syzbot+35a4414f6e247f515443@syzkaller.appspotmail.com, syzkaller-bugs@googlegroups.com, linux-kernel-mentees@lists.linuxfoundation.org, senozhatsky@chromium.org Subject: Re: [PATCH] mm: Fix mmap_assert_locked() in follow_pte() Date: Fri, 12 Jul 2024 14:17:58 +0200 Message-ID: <20240712121800.3049-1-spasswolf@web.de> X-Mailer: git-send-email 2.45.2 In-Reply-To: 20240712080414.GA47643@google.com References: Precedence: bulk X-Mailing-List: linux-kernel-mentees@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Provags-ID: V03:K1:jj4yqdkE527pyY3SjpXZ7w5xCsDUyzuyDN2llM21dpyeUfVkaEj 8c8QcgL5R2B7xVPQuMOwBlnlD45KD+8EP0bPK8HWlLhBF3i76Pb/VjX2RMb5hR9ctwNIj8M ds9WV0M5FPACEa5zyP2mK3r1hG/76rqX6f0yUD+wujQyHnPIEd553x9RNSmP3SYD/gYL8k2 1ojcQkGhf1FsfK8MGNa0w== UI-OutboundReport: notjunk:1;M01:P0:1MBlHXyu56Y=;aSlLV0K8eCzyFKA3YHUJDN2/RDh hqFumxic/j0WLBgJYXMpTt/A8ofLqDtC//hDwxsnvfCPduZKa98J/DRt0AHPDiDRVPWva7iO3 wCeEnamlq0bRZ6jnrNngn3fJ9q5yTC9+Fkbo2Q6QAuauTsldoMXXWW9VUiuL8LLGuPfsQpqyB +ePAqQLo4OakW3/c3YwNGdGROjiV5VlovBiZqaoIlB69iW/2lXoJkISK/3H2gTUtOa9gp0bpQ xMKcLDY3QOJt8b2Ns5A3gGFC8H7lpBNip61Hr6Tg1EQ546/ngmfAWsQLgMGtuL5TzewavxLxU YQ7tXA/EpLqsO9wYwEqfSq4TjWbDiIfHfPYAKbInLz5Yaj5rQno+yvVuv+nFN0a/HEZUPe7db 0D/thIC1kvSy6G5ifOC6i/e+xPCn70fYYZzzBEifaxH6tbff/ijgj+SfGAQb2Yd+3VtqE8bj4 9jie7fQkjFo8uO1Qit8p2UKXnCy3g4RUlWuXyu8iZnrk71lnxZvHdjjCbeSIW9KHYMKBroFFU wy/YVygj8bS1bGFcvfGzaDLcWlLoxYMhH1LiuAry5YHkqPuhMOXQ6BbpT4HDHCCuSOgwoua8C HM9ye/5LmzByhAzsxpHG1JHBZmPEDGli1rP5Xou6FKJhaMXqzYGHzcu1T5b0sL6hgouI03Mnv 9CHn/DW/aKKGZlxFOsw4Lu+dWXFi7PwIRfoRWbOKnCSEMvOAp5NWc9O/A9eSnrCfvdATGRUVX km7lqNa7n8DCt+XxyqviyQs8yXb3wWMvZJloepPHq0UugCDj8qItB8he77SXAWts12uwdHsz1 8raoXIEyf4YKMa2MQkoOmjzA== This is causing a deadlock for me, too. Since linux-next-20240712 I observe a hang when starting the gui. I bisected this to commit a13252049629 and reverting this commit in linux-next-20240712 fixes the issue for me. I do not have any log messages to prove the dead lock, though, as I compiled everything without CONFIG_LOCKDEP. Bert Karwatzki