From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 6F9E5CCD192 for ; Tue, 14 Oct 2025 13:11:00 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id C465B8E0119; Tue, 14 Oct 2025 09:10:59 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id BCF758E0112; Tue, 14 Oct 2025 09:10:59 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id A97CA8E0119; Tue, 14 Oct 2025 09:10:59 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0012.hostedemail.com [216.40.44.12]) by kanga.kvack.org (Postfix) with ESMTP id 918ED8E0112 for ; Tue, 14 Oct 2025 09:10:59 -0400 (EDT) Received: from smtpin03.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay07.hostedemail.com (Postfix) with ESMTP id 52275160923 for ; Tue, 14 Oct 2025 13:10:59 +0000 (UTC) X-FDA: 83996755038.03.48F8017 Received: from mail-io1-f69.google.com (mail-io1-f69.google.com [209.85.166.69]) by imf20.hostedemail.com (Postfix) with ESMTP id 852661C0002 for ; Tue, 14 Oct 2025 13:10:57 +0000 (UTC) Authentication-Results: imf20.hostedemail.com; dkim=none; spf=pass (imf20.hostedemail.com: domain of 34EvuaAkbAH8v12ndoohudsslg.jrrjohxvhufrqwhqw.frp@M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com designates 209.85.166.69 as permitted sender) smtp.mailfrom=34EvuaAkbAH8v12ndoohudsslg.jrrjohxvhufrqwhqw.frp@M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; dmarc=fail reason="SPF not aligned (relaxed), No valid DKIM" header.from=appspotmail.com (policy=none) ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1760447457; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type:content-transfer-encoding: in-reply-to:in-reply-to:references; bh=YTvCLh80L5RCIEYpK48k3nL1zjTVSsw4OaSTIePcCmg=; b=4HssOamS9ltg04avwSDj37vJuwTAqxU5SP0/V1pfXgOhlRKoKCaD5Jv4VTAjTZkjxOFKBj 8zsqMXP6uMjQg7UNBlMrMWacni5XsaUxHyAG6jFhk0aJushjjoMuye/ngZQl1s//YdMidi 6zbsjw3baRF9ZoemrEIjmgl9ejqpvQs= ARC-Authentication-Results: i=1; imf20.hostedemail.com; dkim=none; spf=pass (imf20.hostedemail.com: domain of 34EvuaAkbAH8v12ndoohudsslg.jrrjohxvhufrqwhqw.frp@M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com designates 209.85.166.69 as permitted sender) smtp.mailfrom=34EvuaAkbAH8v12ndoohudsslg.jrrjohxvhufrqwhqw.frp@M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; dmarc=fail reason="SPF not aligned (relaxed), No valid DKIM" header.from=appspotmail.com (policy=none) ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1760447457; a=rsa-sha256; cv=none; b=iwiGm5EV5KOxwlwdFeBprPmADNoF3DFZpIl0EUjrEEbHk/uD4n2OuICcX2E3Ha3PigdLI9 xUdEpve36xC1Ufvn0vTqM+rwSOmUG80krzVv0m2urSgrlqeiJlk9AEr5FSRNjNEux40kVz XGgeChi86x9el1sb0qhMXPjW7EDJIdc= Received: by mail-io1-f69.google.com with SMTP id ca18e2360f4ac-9048fe74483so1392394739f.2 for ; Tue, 14 Oct 2025 06:10:57 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1760447456; x=1761052256; h=cc:to:from:subject:message-id:in-reply-to:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=YTvCLh80L5RCIEYpK48k3nL1zjTVSsw4OaSTIePcCmg=; b=neBGcvwV7gesunNJE8b2KeKjCE6gtgKJyXRy1CzPcNu5n4gh0YGZG2aQw9CyUa8uYW 3m6fQyUe47TMEm5mTOKnKdtCJTEvCOxp9M3C36KrGw0mccblaeCVpOm5e7XGVRZJ+O3Y XQQtnBAIsk1jqm1EFp10036K21y1g8oXmgS61PdXgj5zHGy2artSviXWDUUp1nYgsrSZ uQrVbI+ORZl0THLyMM0FGnItahzzQ2Iv6VK21EZownvQ1sp2bxB8mULx2Gtl8FYZdaYh FFwaW0myoWGSG0L71wklGKYHKkQFW5lY/OX6fbZ7TrKWrokD00nPvESR+M+hoO62bguM f6Qg== X-Forwarded-Encrypted: i=1; AJvYcCWgd5UHiGzJC7x1JZ7fzDjvOJ0bcIltMzPrwLAsPBEZBkPM8iKtN78aAmQwHtSBT3kf0aQQt7i7Dw==@kvack.org X-Gm-Message-State: AOJu0YxdVYKHbiiy8e4KgAcD1Bjtb+6ajhBEAEdK2ZV0y8RypK1O9hzk JpprUmsdwktO8pfyIJYKiEMHHZIS7Ymlj2V5hFu7V9YCP87qDrPfq7vz6UfE6l/+O6kuhnrHICw YKv/bEI6CXDhQA8/MwD5x9ONkheKmUxzZ2IxzR5m4txSRLJ1YDNEzfHnjOUs= X-Google-Smtp-Source: AGHT+IEPH9IF89ITwygTX0sulnxlR817dJPiW7sqU1Z8BIDZ/6e+3f2GvHQhEGN5ckeXiKxOq+fc0U8MPZ/A5YbCtFxHLytXbbXL MIME-Version: 1.0 X-Received: by 2002:a05:6e02:12c5:b0:426:39a:90f1 with SMTP id e9e14a558f8ab-42f873d62c7mr267953315ab.18.1760447456621; Tue, 14 Oct 2025 06:10:56 -0700 (PDT) Date: Tue, 14 Oct 2025 06:10:56 -0700 In-Reply-To: <20251014093124.300012-1-hao.ge@linux.dev> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <68ee4be0.050a0220.ac43.0104.GAE@google.com> Subject: [syzbot ci] Re: slab: Introduce __SECOND_OBJEXT_FLAG for objext_flags From: syzbot ci To: akpm@linux-foundation.org, ast@kernel.org, cgroups@vger.kernel.org, gehao@kylinos.cn, hannes@cmpxchg.org, hao.ge@linux.dev, harry.yoo@oracle.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, mhocko@kernel.org, muchun.song@linux.dev, roman.gushchin@linux.dev, shakeel.butt@linux.dev, surenb@google.com, vbabka@suse.cz Cc: syzbot@lists.linux.dev, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: 852661C0002 X-Stat-Signature: xbo71kf7zj86xfpo55o4d38fzy4hju5d X-Rspam-User: X-HE-Tag: 1760447457-54582 X-HE-Meta: U2FsdGVkX18lcERt8J8H9nG/zJy6agWtfBrCdvDEj5pLJazGdiP8hrEhxnUNM8jQVq7SOvB/K/jBFA60LqtowNZ2cGzHY1Di83aoyT18qaTmcpBt7ljjaw9Qjzxj1Ia1LMs4NhoRfE8cmKigD6TGZWMHdLOiFdmR4OYN4Vy6kk1mIBLLIiybf3SHOi/g/CwyH3ume6tfKROJs8GAFtxSPxo7tkvc5AGW6cWcFHgt1oU+7tvVFaqCDMrQUd3t4kT/4PfvcH3XtcvpLNdZEIOlyc1EuqfSOnWOeiPAVST4wDM2neVFymEVdgL4L6hEcadnZ572wMoBN2utqDjkr9qFiEGjuajWnXOFXLvsHh3BSDMztB4j+F99j0Fqvzk8H646nLLGwliTQY14ADaEGwWeIh3wGgxycmydGI1w/Zp5Z847TSDWAn2yzUoI3qiw94YvATGDIzZlLczE3OBgdVkInvzBlh4ugbwWYjnJicax/B+1NV8/Xx2j3x+3kkt7L1xs0OLFGk5xkc2BAxuiuceeRUr0mxLbTACdVnECF+kbbJj+1zcj/F/dKwjtdUDCBDapCpHaHCbKaryJSpwHyoiyKDbXhaTdQ0hu3P+XoZcvvcyw+yPebIcHJm8bBV20WT8zLgE1eu2qgZO4WzSbYPd7RtzQGmdBUgRHC74CIZs6lXzs+Dq1AKDcC9IogxpSA6CKUTh5J/kBJueYnGmkpGgRYAHiFcnG79Ee+cXo0EhRTDNlj1fskT3SfRnBpmgDq4AEx2c45XKjyikiMA+Ky1+SX0u3169vukpWIUdL1KgdmUfqTyog2wAjrvo57s6Bb6T5Ehm/8w1F8ZU97jg0BRZjp4LkImmUTEPX/fsN3Toi5K1qHRj6YTo0WW0DWcQIuJk2Vn/3DQT5smF5q28u4FbYz1LdD4wXg6ZGfANxjhu5SDWj1FHdCrjzzah42DMMnwjmWgJU7qAf+k0Eew9w4yg ZqOojEFY 4CKg21KlojlSqpF0EMa+8b7SRjqc3XI0vh2apJDS+2dm56edk8anmDCPpDbvRm4Qn7twa06mc1Mgf7toVQZ0D4ZpXrEGSNjWR65Z3/YHXphHaoEHkKJreOl5k8bJk0Iz7jK1ATlB1fJwx9mhD98lr5sOKNeETBWGJDNHKCmt990Bn01KmgJAtSgp9OPhHTKrGxoEY4MB37A5KvO3e95wp0KG1RfVOvCbLqXz/gFRyVWpFRyF6vZ/WOtvf2YdEEvhwEMsqSt3Md65mBFZmTeuD4qK42kqaoBzENH67A19Rdpq3l21HJBavCLYOFjEaRC64P0j0F4Yd7l/5RKOy/N9QU+K4HxQs8QUHARk3/O/hnABsCUwI3kv7KIssstGn35LaCJSkTrnzsMhZpoKpYj4omkxqlhx+tPqgQGd1fWIFh4lL7TDN6WEzhEtmqjmEB6vKwdWmgYPE9B5pJcfmg/zLWdLtcmQc5atBPGwEUAzVoAamiZ8KkSyDnJ5URoJwVbb9xlqLNvIhWFxlBW0jhWYCMgANQv1vwKt7N8otNPV9LpQnbkWgRyWhcP9wevT9WF+14NIQ0h68vp3zgULMouJH6TyPiCFq7X7YKiNkhXWD41z8Ml71J1x/IMiA/L5vGSFOeoSftppLblCi/6E1VmqgBDy3dorBn8JF3QyZ+JlhPy96VJfSkj6ehEmcNFNkr15E7C6YTVtZ3jQqe+svzib9iQXke2mIyGl0dgIW9vUjrPZ+oO07VUXYXqj2eURMemaes1XbJ3IBoDeH2vjIWt4D6X3lzl0VlG6fots16xB290x/7Ev1vHnjiJROvzB6eDFOTP0W5pydnDsIt2iICl6fjXfowt8O9E/7wS0eiy52FP8kpIL3SfqxtNaC20FWcnjw5pBsUkqZiv4y7/f6gtPC8ofdkYCoCOdORuG3+WPJA38XyZR5m8fBhLfQ7vYq+coUag5VRyVTRd58X+TYowTcvza8PLa4 DKJhkFPn Tvh1qhLyt3/0XMbEwjn5fm3utSE+POTxSWeY8qTXdyH+KiwkQ6ttn35SANdRybDqT8wZZ4+PBr2ui0LScIvDEQ== 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: syzbot ci has tested the following series [v1] slab: Introduce __SECOND_OBJEXT_FLAG for objext_flags https://lore.kernel.org/all/20251014093124.300012-1-hao.ge@linux.dev * [PATCH] slab: Introduce __SECOND_OBJEXT_FLAG for objext_flags and found the following issue: general protection fault in percpu_ref_get_many Full report is available here: https://ci.syzbot.org/series/6fd66120-211f-479f-b6a1-35f990da2dc2 *** general protection fault in percpu_ref_get_many tree: torvalds URL: https://kernel.googlesource.com/pub/scm/linux/kernel/git/torvalds/linux base: 0d97f2067c166eb495771fede9f7b73999c67f66 arch: amd64 compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 config: https://ci.syzbot.org/builds/74de5bb7-695b-4115-9a4b-ee7d7fd0cca2/config Oops: general protection fault, probably for non-canonical address 0xdffffc00177780ff: 0000 [#1] SMP KASAN PTI KASAN: probably user-memory-access in range [0x00000000bbbc07f8-0x00000000bbbc07ff] CPU: 1 UID: 0 PID: 6155 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 RIP: 0010:percpu_ref_get_many+0x8d/0x140 Code: 01 48 c7 c7 80 70 78 8b be 65 03 00 00 48 c7 c2 c0 70 78 8b e8 64 2b 6f ff 49 bc 00 00 00 00 00 fc ff df 4c 89 f8 48 c1 e8 03 <42> 80 3c 20 00 74 08 4c 89 ff e8 c4 50 f7 ff 49 8b 07 a8 03 75 62 RSP: 0018:ffffc90004df7500 EFLAGS: 00010206 RAX: 00000000177780ff RBX: ffffffff822de139 RCX: 14bab840e71f4400 RDX: 0000000000000000 RSI: ffffffff8bc074c0 RDI: ffffffff8bc07480 RBP: 0000000000000088 R08: 0000000000000000 R09: ffffffff822de139 R10: dffffc0000000000 R11: fffffbfff1f3c1ef R12: dffffc0000000000 R13: ffff88823c63b5c0 R14: 0000000000000001 R15: 00000000bbbc07f8 FS: 0000555570ae6500(0000) GS:ffff8882a9d12000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555562d8c5c8 CR3: 0000000113444000 CR4: 00000000000006f0 Call Trace: refill_obj_stock+0x254/0x850 __memcg_slab_free_hook+0x123/0x3b0 kfree+0x3f7/0x6d0 kobject_uevent_env+0x361/0x8c0 netdev_queue_update_kobjects+0x346/0x6c0 netdev_register_kobject+0x258/0x310 register_netdevice+0x126c/0x1ae0 __ip_tunnel_create+0x3e7/0x560 ip_tunnel_init_net+0x2ba/0x800 ops_init+0x35c/0x5c0 setup_net+0xfe/0x320 copy_net_ns+0x34e/0x4e0 create_new_namespaces+0x3f3/0x720 unshare_nsproxy_namespaces+0x11c/0x170 ksys_unshare+0x4c8/0x8c0 __x64_sys_unshare+0x38/0x50 do_syscall_64+0xfa/0xfa0 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f85c81906c7 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 10 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:00007ffe57c0ca58 EFLAGS: 00000246 ORIG_RAX: 0000000000000110 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f85c81906c7 RDX: 00007f85c818eec9 RSI: 00007ffe57c0ca20 RDI: 0000000040000000 RBP: 00007ffe57c0cac0 R08: 00007f85c83a69d0 R09: 00007f85c83a69d0 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe57c0cac0 R13: 00007ffe57c0cac8 R14: 0000000000000009 R15: 0000000000000000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:percpu_ref_get_many+0x8d/0x140 Code: 01 48 c7 c7 80 70 78 8b be 65 03 00 00 48 c7 c2 c0 70 78 8b e8 64 2b 6f ff 49 bc 00 00 00 00 00 fc ff df 4c 89 f8 48 c1 e8 03 <42> 80 3c 20 00 74 08 4c 89 ff e8 c4 50 f7 ff 49 8b 07 a8 03 75 62 RSP: 0018:ffffc90004df7500 EFLAGS: 00010206 RAX: 00000000177780ff RBX: ffffffff822de139 RCX: 14bab840e71f4400 RDX: 0000000000000000 RSI: ffffffff8bc074c0 RDI: ffffffff8bc07480 RBP: 0000000000000088 R08: 0000000000000000 R09: ffffffff822de139 R10: dffffc0000000000 R11: fffffbfff1f3c1ef R12: dffffc0000000000 R13: ffff88823c63b5c0 R14: 0000000000000001 R15: 00000000bbbc07f8 FS: 0000555570ae6500(0000) GS:ffff8882a9d12000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555562d8c5c8 CR3: 0000000113444000 CR4: 00000000000006f0 *** If these findings have caused you to resend the series or submit a separate fix, please add the following tag to your commit message: Tested-by: syzbot@syzkaller.appspotmail.com --- This report is generated by a bot. It may contain errors. syzbot ci engineers can be reached at syzkaller@googlegroups.com.