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Tue, 08 Jul 2025 10:52:27 -0700 (PDT) Date: Tue, 08 Jul 2025 10:52:27 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <686d5adb.050a0220.1ffab7.0019.GAE@google.com> Subject: [syzbot] [mm?] WARNING: lock held when returning to user space in lock_next_vma From: syzbot To: Liam.Howlett@oracle.com, akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, lorenzo.stoakes@oracle.com, shakeel.butt@linux.dev, surenb@google.com, syzkaller-bugs@googlegroups.com, vbabka@suse.cz Content-Type: text/plain; charset="UTF-8" X-Rspam-User: X-Rspamd-Server: rspam01 X-Rspamd-Queue-Id: 70F1018000E X-Stat-Signature: p1soiqnqpygzgombnqjz918kw3uqibgs X-HE-Tag: 1751997148-683129 X-HE-Meta: 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 zs8Fdxv/ ulXLJ1p9kRBxQ/1sbaV2ZvfbaJM23ImieL1HL8WwIcg21bcrswd+SHKUHEswCgCNZ26oVUatvPLg+ChaJt/9wbXs5n+MBwKidiVgXPwD2xpVeEv2DXKwm/JB3qDR9eoKrD+71jrdraA6d/fqSRtzic7Eth6/ieaXqQ6Hr2mvpkfLUqfm65YNfZSFdeBeui5+ixcQ4HnmxyJDRRxhwSS+BUwszs69NJP+jbNrZm1fGcRF5Rb53s8LlXLKDuU9qgWR3DWrCdLMv7OCKYLHPSSlU137JSBa7XxvCz1aVVj00LgVXXZT979EBCjpRa14oec2hr2whpzN3TYR54RP8QPUdreeqPNHDtegMI5Glao/URQm/VKFd3cQifkLLFG+ucZci4cMzXLCqkygeEvXLze7M7e1FBebnHaINKgjpFmfTGuktn7MygdYSai09ddMxWZ0LU8DoSeHCx5/z2XnQjiLdzl91hCaZYxmjWTW1/hDzcePZxXEfuWTe725DKZfVmp2GUljNDE97+gQzC3Akv52J46Bri8EPbIh9d2tCdr1R9oIlPQ0U0SwUEBn5a+xZ+ygQg7VnTF7UtXPUtiBmWZuYokI4zcqondb3kxSlhhdCAJKKGdiJptDrSXTv9bS8HSIF1vyiAGf+0WhMYrwJwZQfrsE3+m8GZHszhSsWwhTT7iIjCejTKQiMKF2gltL2mLLb740hwwQU+54zjxh+BWXiVC8xVdehdji4zrJiw54uiD76m7dxfPowaUYgDfWo9cVvxOImQrp1Z6LJEvkO21i4Iqw4Shp7xOjumgmUJFeVN0nA/PFsCscHsB9lJ4mANOt06+WBDfm4AfZawEIJMV9b34Fm+6NQBuIi76qPJvebz3HDnp79Q/ULmflQT6OuV1GHdNfONPLcgJcwAN4zPnnyVzYvwhkdnC4WHMuIAGoC7I7Q8y3ICmfd/Kzg45WJ9pkU9cunytCBPxS9JC4UfhSY1eesD298 f8jk+TVA oQmqZmG8E209/Yc1Va8blseBGnRPUleKYzCAAnQG9PUJovGx/lyR/5/1s8Fq1ynUi4ikjmyWFrQBP30PyWFvq3whtHr4MLT3cZVGo9qf90sFcXSMb1h3lhbm2FmJvcttMcacQRIqgP54tTGHjGXGk46ypQLwfF6Hgynz0XFtBFQbuIH+qS2oFnDF1JJ9AQnRZRAxZT4uPKdbqNkdD2To8XNbHVL82EL/Jgm9ouU0pSeijd60i6UF5iIU1Kw1BuJ8C6ExWYorcm82p2uV/9Twd6LZWFRKQct/AJAtVXlGA1AFf5W3B/50I1QkMs9eQ2+geu4EnaV/iTjocX6PybUYtXdjjFatz1xwIVsFX+31hdqpsZcnbD7dLm+180APbl3zatrIlwHeEg+DynEvDmV8yc6XDT5VhMN9Y+Aoc3GKHSQ= 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: Hello, syzbot found the following issue on: HEAD commit: 26ffb3d6f02c Add linux-next specific files for 20250704 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=1719df70580000 kernel config: https://syzkaller.appspot.com/x/.config?x=1e4f88512ae53408 dashboard link: https://syzkaller.appspot.com/bug?extid=80011ad33eec39e6ce42 compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1124abd4580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1099df70580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/fd5569903143/disk-26ffb3d6.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/1b0c9505c543/vmlinux-26ffb3d6.xz kernel image: https://storage.googleapis.com/syzbot-assets/9d864c72bed1/bzImage-26ffb3d6.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+80011ad33eec39e6ce42@syzkaller.appspotmail.com ================================================ WARNING: lock held when returning to user space! 6.16.0-rc4-next-20250704-syzkaller #0 Not tainted ------------------------------------------------ syz.0.22/6068 is leaving the kernel with locks still held! 1 lock held by syz.0.22/6068: #0: ffff8880792a3588 (vm_lock){++++}-{0:0}, at: lock_next_vma+0x146/0xdc0 mm/mmap_lock.c:220 --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup