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006d021491bc7-679c41f0fcdmr3630394eaf.29.1771836008198; Mon, 23 Feb 2026 00:40:08 -0800 (PST) Date: Mon, 23 Feb 2026 00:40:08 -0800 In-Reply-To: <20260223032641.1859381-1-ziy@nvidia.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <699c1268.050a0220.340abe.0d38.GAE@google.com> Subject: [syzbot ci] Re: Zero page->private when freeing pages From: syzbot ci To: airlied@gmail.com, akpm@linux-foundation.org, aliceryhl@google.com, arve@android.com, axboe@kernel.dk, baohua@kernel.org, baolin.wang@linux.alibaba.com, brauner@kernel.org, christian.koenig@amd.com, cl@gentwo.org, cmllamas@google.com, dave@stgolabs.net, david@kernel.org, dennis@kernel.org, dev.jain@arm.com, dhavale@google.com, dlemoal@kernel.org, dri-devel@lists.freedesktop.org, gregkh@linuxfoundation.org, guochunhai@vivo.com, hannes@cmpxchg.org, harry.yoo@oracle.com, jackmanb@google.com, jefflexu@linux.alibaba.com, johannes.thumshirn@wdc.com, katrinzhou@tencent.com, kernelxing@tencent.com, kprateek.nayak@amd.com, lance.yang@linux.dev, liam.howlett@oracle.com, lihongbo22@huawei.com, linux-block@vger.kernel.org, linux-erofs@lists.ozlabs.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, lorenzo.stoakes@oracle.com, maarten.lankhorst@linux.intel.com, matthew.auld@intel.com, matthew.brost@intel.com, mhiramat@kernel.org, mhocko@suse.com, mripard@kernel.org, npache@redhat.com, ray.huang@amd.com, rientjes@google.com, roman.gushchin@linux.dev, ryan.roberts@arm.com, sandeen@redhat.com, simona@ffwll.ch, surenb@google.com, tj@kernel.org, tkjos@android.com, tzimmermann@suse.de, vbabka@kernel.org, xiang@kernel.org, zbestahu@gmail.com, ziy@nvidia.com Cc: syzbot@lists.linux.dev, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" syzbot ci has tested the following series [v1] Zero page->private when freeing pages https://lore.kernel.org/all/20260223032641.1859381-1-ziy@nvidia.com * [PATCH v1 01/11] relay: zero page->private when freeing pages * [PATCH v1 02/11] mm/slub: zero page->private when freeing pages * [PATCH v1 03/11] drm/ttm: zero page->private when freeing pages * [PATCH v1 04/11] blk-mq: zero page->private when freeing pages * [PATCH v1 05/11] watch_queue: zero page->private when freeing pages * [PATCH v1 06/11] binder: zero page->private when freeing pages * [PATCH v1 07/11] null_blk: zero page->private when freeing pages * [PATCH v1 08/11] percpu: zero page->private when freeing pages * [PATCH v1 09/11] erofs: zero page->private when freeing pages * [PATCH v1 10/11] mm/huge_memory: add page->private check back in __split_folio_to_order() * [PATCH v1 11/11] mm/page_alloc: check page->private upon page free and found the following issue: WARNING in __free_frozen_pages Full report is available here: https://ci.syzbot.org/series/10f470ac-46ac-4e38-902d-dc86ae743494 *** WARNING in __free_frozen_pages tree: mm-new URL: https://kernel.googlesource.com/pub/scm/linux/kernel/git/akpm/mm.git base: a6fdc327de4678e54b5122441c970371014117b0 arch: amd64 compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8 config: https://ci.syzbot.org/builds/0586347c-8ef1-427f-8a9c-7f6c08b616a9/config Bluetooth: RFCOMM ver 1.11 Bluetooth: BNEP (Ethernet Emulation) ver 1.3 Bluetooth: BNEP filters: protocol multicast Bluetooth: BNEP socket layer initialized Bluetooth: HIDP (Human Interface Emulation) ver 1.2 Bluetooth: HIDP socket layer initialized NET: Registered PF_RXRPC protocol family Key type rxrpc registered Key type rxrpc_s registered NET: Registered PF_KCM protocol family lec:lane_module_init: lec.c: initialized mpoa:atm_mpoa_init: mpc.c: initialized l2tp_core: L2TP core driver, V2.0 l2tp_ppp: PPPoL2TP kernel driver, V2.0 l2tp_ip: L2TP IP encapsulation support (L2TPv3) l2tp_netlink: L2TP netlink interface l2tp_eth: L2TP ethernet pseudowire support (L2TPv3) l2tp_ip6: L2TP IP encapsulation support for IPv6 (L2TPv3) NET: Registered PF_PHONET protocol family 8021q: 802.1Q VLAN Support v1.8 sctp: Hash tables configured (bind 32/56) NET: Registered PF_RDS protocol family Registered RDS/infiniband transport Registered RDS/tcp transport tipc: Activated (version 2.0.0) NET: Registered PF_TIPC protocol family tipc: Started in single node mode smc: adding smcd device lo without pnetid NET: Registered PF_SMC protocol family 9pnet: Installing 9P2000 support NET: Registered PF_CAIF protocol family NET: Registered PF_IEEE802154 protocol family Key type dns_resolver registered Key type ceph registered libceph: loaded (mon/osd proto 15/24) batman_adv: B.A.T.M.A.N. advanced 2025.5 (compatibility version 15) loaded openvswitch: Open vSwitch switching datapath NET: Registered PF_VSOCK protocol family mpls_gso: MPLS GSO support IPI shorthand broadcast: enabled sched_clock: Marking stable (19970046340, 93374727)->(20073238384, -9817317) registered taskstats version 1 Loading compiled-in X.509 certificates Loaded X.509 cert 'Build time autogenerated kernel key: 98092a222e11368da223b039d625e21c3e2e069c' zswap: loaded using pool 842 Demotion targets for Node 0: null Demotion targets for Node 1: null debug_vm_pgtable: [debug_vm_pgtable ]: Validating architecture page table helpers ------------[ cut here ]------------ page->private WARNING: mm/page_alloc.c:1433 at __free_frozen_pages+0x78e/0xe10, CPU#0: swapper/0/1 Modules linked in: CPU: 0 UID: 0 PID: 1 Comm: swapper/0 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:__free_frozen_pages+0x78e/0xe10 Code: 5f 5d e9 05 1e 00 00 48 b8 00 00 00 00 00 fc ff df 0f b6 44 05 00 84 c0 0f 85 d7 02 00 00 c7 03 ff ff ff ff e9 22 fc ff ff 90 <0f> 0b 90 e9 8d fc ff ff bd 01 00 00 00 83 f8 05 0f 85 bb fe ff ff RSP: 0000:ffffc900000676e0 EFLAGS: 00010282 RAX: 1ffffd4000bad935 RBX: ffffea0005d6c9a8 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffffea0005d6c9b4 RBP: ffffea0005d6c9b8 R08: ffffea0005d6c9b7 R09: 1ffffd4000bad936 R10: dffffc0000000000 R11: fffff94000bad937 R12: ffffea0005d6c980 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff88818de64000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffff88823ffff000 CR3: 000000000e54c000 CR4: 00000000000006f0 Call Trace: destroy_args+0x15d/0x570 debug_vm_pgtable+0x3f8/0x410 do_one_initcall+0x250/0x8d0 do_initcall_level+0x104/0x190 do_initcalls+0x59/0xa0 kernel_init_freeable+0x2a6/0x3e0 kernel_init+0x1d/0x1d0 ret_from_fork+0x51e/0xb90 ret_from_fork_asm+0x1a/0x30 *** 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.