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AJvYcCW1G8CoiUTn1oITBWvJ63PoI5TqyRFx9+duYniKE/iZ6D7f7WA7nwYkOTUtprt8y+SLtvBSbsk4Ow==@kvack.org X-Gm-Message-State: AOJu0YyoiqUPTR5noc6xOuLbLXdWpfHSOoxs8xVN9kUUCKHyvbZpb/Uu cB8aene5EBjkCNepcfSVCwRiUme6ZrBBdT0mNaOmEV58zRMrsaAheBrMGU88rIzL3BmE2Cz6Lkq utcssU+Nr3LH63VIncAmeWUco9TSrbDkGbX9H1atkG1meAyd68fOYEBPEJDY= X-Google-Smtp-Source: AGHT+IFqLPDPKBiPRu3uu7IeP812DZQb4h/dmZnbCd8SnvgWxvVU1yv/z8fN5lQPvlaeArHHV0ZoY+wPaoICTLGVJWFDgk3ltdWI MIME-Version: 1.0 X-Received: by 2002:a05:6e02:349d:b0:433:4ac7:13bb with SMTP id e9e14a558f8ab-43367dd8a03mr188557675ab.11.1762854363073; Tue, 11 Nov 2025 01:46:03 -0800 (PST) Date: Tue, 11 Nov 2025 01:46:03 -0800 In-Reply-To: <20251111-lausbub-wieweit-76ec521875b2@brauner> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <691305db.a70a0220.22f260.0130.GAE@google.com> Subject: Re: [syzbot] [fs?] WARNING in nsproxy_ns_active_put From: syzbot To: akpm@linux-foundation.org, bpf@vger.kernel.org, brauner@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, liam.howlett@oracle.com, 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 Content-Type: text/plain; charset="UTF-8" X-Rspamd-Server: rspam03 X-Rspamd-Queue-Id: EA8424000F X-Stat-Signature: o79ge4fnmnccx3m4tcgmhhef71r3boi5 X-Rspam-User: X-HE-Tag: 1762854363-770884 X-HE-Meta: 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 PK+7NsvY 2ncdpfndkFSQ9MPBFhnc2l/RP/pTglf9ts7kESpFM08mdqYMm+kDuIGgC3VzNa6pC9KVNw6kHWzzI4GFkxfZe6kZNJQMSno+Qf+GC/hkV+0= 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 has tested the proposed patch but the reproducer is still triggering an issue: WARNING in __ns_ref_active_put ------------[ cut here ]------------ WARNING: CPU: 0 PID: 6489 at kernel/nscommon.c:171 __ns_ref_active_put+0x3d7/0x450 kernel/nscommon.c:171 Modules linked in: CPU: 0 UID: 0 PID: 6489 Comm: syz.0.18 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 RIP: 0010:__ns_ref_active_put+0x3d7/0x450 kernel/nscommon.c:171 Code: 4d 8b 3e e9 1b fd ff ff e8 b6 61 32 00 90 0f 0b 90 e9 29 fd ff ff e8 a8 61 32 00 90 0f 0b 90 e9 59 fd ff ff e8 9a 61 32 00 90 <0f> 0b 90 e9 72 ff ff ff e8 8c 61 32 00 90 0f 0b 90 e9 64 ff ff ff RSP: 0018:ffffc90003457d50 EFLAGS: 00010293 RAX: ffffffff818e5b86 RBX: 00000000ffffffff RCX: ffff88802cc69e40 RDX: 0000000000000000 RSI: 00000000ffffffff RDI: 0000000000000000 RBP: ffffc90003457e00 R08: ffff8880320be42b R09: 1ffff11006417c85 R10: dffffc0000000000 R11: ffffed1006417c86 R12: dffffc0000000000 R13: 1ffff11006417c84 R14: ffff8880320be420 R15: ffff8880320be428 FS: 00007fe11c3746c0(0000) GS:ffff888125cf3000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2d863fff CR3: 000000007798c000 CR4: 00000000003526f0 Call Trace: nsproxy_ns_active_put+0x4a/0x200 fs/nsfs.c:701 free_nsproxy+0x21/0x140 kernel/nsproxy.c:190 put_nsset kernel/nsproxy.c:341 [inline] __do_sys_setns kernel/nsproxy.c:594 [inline] __se_sys_setns+0x1459/0x1c60 kernel/nsproxy.c:559 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fe11b590ef7 Code: 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 34 01 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fe11c373fd8 EFLAGS: 00000246 ORIG_RAX: 0000000000000134 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007fe11b590ef7 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000000000c9 RBP: 00007fe11b611f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fe11b7e6038 R14: 00007fe11b7e5fa0 R15: 00007ffcd9b83d18 Tested on: commit: 18b5c400 Merge patch series "ns: header cleanups and i.. git tree: https://github.com/brauner/linux.git namespace-6.19 console output: https://syzkaller.appspot.com/x/log.txt?x=12c08658580000 kernel config: https://syzkaller.appspot.com/x/.config?x=59952e73920025e4 dashboard link: https://syzkaller.appspot.com/bug?extid=0b2e79f91ff6579bfa5b compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 Note: no patches were applied.