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b=b4F6wrYigF74u/gM39t5dR4yPM/K39Os3h41DM2HEnQyd7F3uIzD8A3fxAuLwXaFk Xr0ugeiA8A+oQ7qOVe0xZvkVcmuX5W7EnOj5B/UEG+VJsA+cxjdU5LxoMnQwH01aAF uQR1i6zpFgV5/1sf/LPS6F2MeS82TASh9CPIwSv+Mo60ws8nZrTolhCqULZXDJ/Inp WNLVu3MijLSIvYeNENkBYXsmFW0fdmcbbcdaBhDUx4nCfby2JC34XSIJby6UGuj8CN uSm04F6slHTJtqvCdO2jkOoESqNVSjsmw7pLJat+5mO2wMbErWhjv4xacl5iobdWP9 fu6Hj1x4bETrQ== Date: Tue, 11 Nov 2025 10:24:24 +0100 From: Christian Brauner To: syzbot Cc: Liam.Howlett@oracle.com, akpm@linux-foundation.org, bpf@vger.kernel.org, bsegall@google.com, david@redhat.com, dietmar.eggemann@arm.com, jack@suse.cz, jsavitz@redhat.com, juri.lelli@redhat.com, kartikey406@gmail.com, kees@kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-security-module@vger.kernel.org, lorenzo.stoakes@oracle.com, mgorman@suse.de, mhocko@suse.com, mingo@redhat.com, mjguzik@gmail.com, oleg@redhat.com, paul@paul-moore.com, peterz@infradead.org, rostedt@goodmis.org, rppt@kernel.org, sergeh@kernel.org, surenb@google.com, syzkaller-bugs@googlegroups.com, vbabka@suse.cz, vincent.guittot@linaro.org, viro@zeniv.linux.org.uk, vschneid@redhat.com Subject: Re: [syzbot] [fs?] WARNING in nsproxy_ns_active_put Message-ID: <20251111-lausbub-wieweit-76ec521875b2@brauner> References: <690bfb9e.050a0220.2e3c35.0013.GAE@google.com> <69104fa2.a70a0220.22f260.00a5.GAE@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <69104fa2.a70a0220.22f260.00a5.GAE@google.com> X-Stat-Signature: rfyyzycm87njmawfom1rmq848y7bmmbc X-Rspam-User: X-Rspamd-Queue-Id: 6D04F40007 X-Rspamd-Server: rspam10 X-HE-Tag: 1762853075-383468 X-HE-Meta: U2FsdGVkX19ZF6dxXiOGxcNG1LwkNf3P/eTndrINTh2/PPqDNQzlR25oy6NRGnz05N8lZ6nu0rLzXlQWhK7oDzGehv9/yto86QdzwJp4I7ciTiJfM/6x3oy0nMRgIoL/IgoL79bIgKxO+S105FAJjwfRuhTyDbmBFeEKOab9egzcQ+8QPXqfoElxCOUUHPRTj9TqnfIm+RHM6sqUgRrEmrtzCswzZoqBrHrRFDKZfRpntEzteCJWR6lI9N98CdnEegwzni9Rm0SDtodBlnaFW+brkjTbxzSS3V4KRnkciHxLxYDe00QWn5F9Kjogwa2H/NXR9WkMhyuaoQshHxO7iwmmWokaSvpzEhssiIuJuSB82TMe8IiE83vuRGdY8PzVi23ncm1IFUGJRvnZfnY8BNqcuxtashv/jBvrqxWBMUnExlwOJk9Lh3GLBJesExcCZiW70avRhrR9Dw0yI24pQVY44AiXSOxaysTz2HGqVGr91IXuMGxWJmApaXVQ16NzesE2KOOYqPNV0eTFIAcbrabfnWzrAfv8MVx+QmfydBxKtXcT40wVGHy8rbDuaQgAmJzwHf2TR7rzNROgipsf1GR5R0oLqj1aKbgLwfWI8dLSyypSsb+GuiyG8U2UBiZ/65TvUEt/TY3txWH+SR438zCpiilBfbvL5nxj1BJi5iSp6pBjIPqJtM2mZ8Y3MzxCmfGRqBwCDV34bBDCriZIyERE+S9Lh2IYSgj3scVEYrqnnSgYjWqwDaa3fxcusa2oBWa7FXhIXrU47XeLmrJi+sUEfadyM5eHECRTccD1eRSnbZZ6gPao+jnSDG65Q4R0kvdhKM21oYUBoTXfPTk+9hpttKku1P8AcSHRoJf7bjwHwcGEtdymEmYFGBMh6Tl6prOm+0eb5wZKKNaB7WKDXA8qDk/ncW46/OPiRH0aidbboGSqzaE6418wHvEYHRMzfNQ4FN0pPwFqsJyF4K6 DDNReQLf 7ipF4faiGviGdcVkgjUQiRoCQ2iOp007ARGO5QlRdaZdVICub8FI7gAoDATRr4t35ZBbh1NrUXTaRk1oEW8LQjEbVdyZ/uAzFzGbDKPeVuI7dVy4CJOYt2RzAZd13bcQuhA8xdvWEL7EBQrM9V3x2S+V2uAaSlv7DjVfOIkS370/K7QH/uOQAV6K2aDEyYeuxEPdmGHyQiGWy6IrhMo4KCtyfwFiW+bG0y7NW9aPW+YgkG3Vv25mceYLO5eiplN4crCCJ2pqCnADS4JCXd5Sm0710wiNLGrnFUuBYxM/uywKC1/W8jJHkvVKephPuYV2KLimAi8uRopR/eHjER+S0lCnJCsMiIB+oN9ybqBeCsaJ3uoPOLsCzG4wYbhKuQ8pW8UUSubeKTIuEc+5pyuxvTppiTwHIfUH//dQ64xXFkNN+gN86Y/9555fhL0T3IyQvH6mPoqf3dn/89OWK06X8rSNuFWOZ+uin8kZG5CeI8sDYk8sge2ZZvEEUcrvKh7itAZhGeU6L0tI6si/TmjLO85lW50Q26lHRNsTS0r9zvuE8h2x9paJfT2OLIyhfP5WAIxRS1gFdoSyefnNJSdKIs7mWwo5tWDX2BrAqEWXeREO7k8MmMrGRXxPokQxIi22yATb5ld+mSKiYw+hoSfxSBkf1cA1UrVLUdqAzyhTnY4+WqM2FH/sdv3sDMpMTeKi6xLGG9j4MLeRXRusTFbEXlIIDVm9Jov/Z9247ZPGwxx7/c6FHR/HeueCZjMPcUYBgCJal9HzNTCgQn8xak9Gu82TaWawCGkYwVBM/ZD+FMTBILZUbzSH/rxeaubFvskjTDih3TfmMrcM68AKTBVkptE4o/guGhg1nkLQWSlDY3Yy3hyGEqG0IZu0pvg== 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: On Sun, Nov 09, 2025 at 12:24:02AM -0800, syzbot wrote: > syzbot has bisected this issue to: > > commit 3a18f809184bc5a1cfad7cde5b8b026e2ff61587 > Author: Christian Brauner > Date: Wed Oct 29 12:20:24 2025 +0000 > > ns: add active reference count > > bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=11a350b4580000 > start commit: 9c0826a5d9aa Add linux-next specific files for 20251107 > git tree: linux-next > final oops: https://syzkaller.appspot.com/x/report.txt?x=13a350b4580000 > console output: https://syzkaller.appspot.com/x/log.txt?x=15a350b4580000 > kernel config: https://syzkaller.appspot.com/x/.config?x=f2ebeee52bf052b8 > dashboard link: https://syzkaller.appspot.com/bug?extid=0b2e79f91ff6579bfa5b > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1639d084580000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1625aa92580000 > > Reported-by: syzbot+0b2e79f91ff6579bfa5b@syzkaller.appspotmail.com > Fixes: 3a18f809184b ("ns: add active reference count") > > For information about bisection process see: https://goo.gl/tpsmEJ#bisection #syz test: https://github.com/brauner/linux.git namespace-6.19