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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: MIME-Version: 1.0 X-Provags-ID: V03:K1:jj4yqdkE527pyY3SjpXZ7w5xCsDUyzuyDN2llM21dpyeUfVkaEj 8c8QcgL5R2B7xVPQuMOwBlnlD45KD+8EP0bPK8HWlLhBF3i76Pb/VjX2RMb5hR9ctwNIj8M ds9WV0M5FPACEa5zyP2mK3r1hG/76rqX6f0yUD+wujQyHnPIEd553x9RNSmP3SYD/gYL8k2 1ojcQkGhf1FsfK8MGNa0w== UI-OutboundReport: notjunk:1;M01:P0:dHtLm5iMoQA=;IYmXqux8Z3H9WpQfWGaQANw7us5 TDmjnSAKgGEOBoPR1f3mNHeon7KjtXT2+7r2iCxJeEuh0JhNKGU0RWNofpixBy7daeFqifSFG YQ3Ucg/mkj0QoMYdCclzeDDZPzV4X0SrXc3NsaLUkgV0immjZemndltgXMrEGs/UOq2zOIIs4 x/o+ykNz8hh0cppqflIqWorex86N0x/LS8pgB2x53n1x4HFGrsv6Gb5RZJeAvlKTNjH3yxzXa Z8pw+gqpQPllnKUH+TZKpFHVANJASiJtWebb1pttU/73bye80LyBkwddBdrhH6aLtjge9LxPT QEIJnj4S6/HH4HUiXgRYjZ9cuyqGxQ9Rr0Ki1L7urNR66MSZgAWHcco4SCNGlmhUZbB+F5WWA W5Y6VogjCl915XakB0cnIeIMFtR37ak98bD8lv0TFNwUY4mOWW8GZwXoOc/0n1ybXCUvmMGT0 q5tx7ZxNRIKEMIcGGR1ZSsu2nwdtVCdYYIox/zBkIHvZTF6l9WqhwBCXWKvd0H1lNIpdfWiKk 3CQXY3jZr6PP5l7eVuHnk1Mtcq1ajQwmBAzLu5yJkKNDTT7erknO8+kfEqE/7FoDIsR3wC/77 jJwgDOr4S2OjcGbwuL/zDOdRZC5udV39EGcnmdiZjpJLwNmbgdrLskOvfFC+0B2wuWQFhlS5w uz+Bx4+tQXXzdpEpr0r6Q26kPdZt+EiP4jo1rwGt+GWPDOzOEqZbGufrJGo2vYean/zM1pt6+ 0S/BNLo5iU5skT/tvSKFrxTC2La+4D1pEK2fsc910Bc+cfK6Rl+OO2X6lUA3/yXnnwG0bGjjm NQqJQ3qyec1jAy870IA+9O9g== X-Rspam-User: X-Rspamd-Server: rspam01 X-Rspamd-Queue-Id: 18C2B12001F X-Stat-Signature: 95sbahr8f5hywhmgy4is44kmean6keex X-HE-Tag: 1720786689-915881 X-HE-Meta: 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 8oFjQD9T cXL3J4cT7cz0b5QbRYOUsxUBOTbd5ac2zXH/wis8Wi5okPZdajw1jjMMqmdmFpR4J78MD0ba2LCL13vmXpYveL27J8UTJQyk6gU9P9NeetB9cJPbvWGx0rE7sD8TUJGr8LF3/nSk3Nv5TCOV9zhzw8LporzPmS/ZscMOTftyP2CTmjZDppGWr02YYlgS8iNJP6fK/Ir1f4bFP3eV5N4Pz6iJG0OCm2ATxLNyO8slLuuZOnUJptVwyEBLyxvefHejDiQiRxF+HRKW0zbWFy7+lx4vRKydsjzAdmOaZXqtTbelu3vJbbR2Sl6W6HYxSiACiDlnuYYf66mIteTWa2zmZHI+fBNefr6jJOT0Y 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: List-Subscribe: List-Unsubscribe: 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