From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oa1-f71.google.com (mail-oa1-f71.google.com [209.85.160.71]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B47543F1AAC for ; Thu, 28 May 2026 14:47:01 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.160.71 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779979626; cv=none; b=UNHcfwqdZRwSUdhio2ev7rVQM1PHTs4MrBBxsiYQPS/FkcnrJQ88qKEv1jAifsLe4uYqAzbPs3MdWufm3i9Vj4k0f++0j2Y83k/6rNQ/rKDkq8INXtqOxKjZ8xPqtDyMBrDL0/JJBRC2NOxGX8w7zE9jCVfxX8wzy8AUGGXHnrk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779979626; c=relaxed/simple; bh=MSqN4zxQ1on7zz006ItWCJozTc5uxGS+n/rnTQ2cbo0=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To:Cc: Content-Type; b=nxBORFutNuR2veMXeUYMLCuANRBx5+8eJVTXhAdSWpd6kmEpbUK0VBsposUZOoMp+Y//v5Cncel+UJwnSKddxVmAgUerDUToDZhLBwhA4RWDFOFUrWZOa6qsAVXBQgsNXwRhHxabju4CDwDJ4ZQHh6AmJvHvQlvjAFR4AODSg8o= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.client-ip=209.85.160.71 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com Received: by mail-oa1-f71.google.com with SMTP id 586e51a60fabf-43b911ac62fso5566569fac.2 for ; Thu, 28 May 2026 07:47:01 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1779979621; x=1780584421; h=content-transfer-encoding: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=MOIO3wBJWru8qa+cgEoJv4S/2CcvnvFRT+RaIG6z6nk=; b=KgZAN9myB2XlOCMO7uSQBO0R1TYelyuxkE50tL1og4rUocCQDlIUfYpv3Wf1zjO2q1 dIZjfsGibzQwATwBTGx7Bfn6vY5yis+NT1p8yMV3K1HGS86g6dm2Z5LBYyAQUCkA6ePh VcO/ERhcKPGFZoGT1Vs9hxgazgPqfQKig6z4jA4N/Oa5H13E02ZnzW7CqZvy/vAzk0ny u27mHoi2RQXhzBNjOjXCeondhEQu63an5Q1wN7Kdpjy8TRgIvTcCSXdyb4Qc7V1/X/9D zVOSQ9SShrkd3Qjwp0u2QD5D4hDY0oO8LzxxpqCV5KCgMlr89uwq52kyOLPAocrkoQhs /5TA== X-Forwarded-Encrypted: i=1; AFNElJ9sviVBp2VwFy7Z305W294kac1b996YOWtKORcaToy3tNPdkkM931YnGneLGi/BexfdL2goMe8=@lists.linux.dev X-Gm-Message-State: AOJu0YyTMkv9KrILFx8vXgiL6gMD9dnLc1W4cbw9QehsgvMNsg4n/XB1 YT1sclKrC2K1grgUiYuXhqCKqyI8wEkP8t8bSBhm+r9NdSWKUQqjgrKJGGZ1TpP6E3eAh6vu8dF efD2TzH/Ioy/Q9KhyrWdUSi+f2Iklcauq5lSJLhFDDUxU2brGXKKswsnoZpk= Precedence: bulk X-Mailing-List: syzbot@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:4d06:b0:69d:e235:8868 with SMTP id 006d021491bc7-69de2358d98mr4519889eaf.36.1779979620715; Thu, 28 May 2026 07:47:00 -0700 (PDT) Date: Thu, 28 May 2026 07:47:00 -0700 In-Reply-To: <6a185564.7f45b5d1.9d2a9.0007.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a185564.586c836d.2e3ab2.0002.GAE@google.com> Subject: Re: Re: [moderation/CI] Re: netlink: fix skb refcount leak when dump start fails From: syzbot To: syzbot@syzkaller.appspotmail.com Cc: pimyn@google.com, syzbot@lists.linux.dev, syzkaller-upstream-moderation@googlegroups.com Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable >>>>>> #syz upstream >>>>> >>>>> Failed to process the command. Contact syzkaller@googlegroups.com. >>>>> >>>>>> >>>>>> On Thu, May 28, 2026 at 4:39=E2=80=AFPM syzbot ci >>>>>> wrote: >>>>>>> >>>>>>> syzbot ci has tested the following series >>>>>>> >>>>>>> [v1] netlink: fix skb refcount leak when dump start fails >>>>>>> https://lore.kernel.org/all/20260528073614.1169858-1-vulab@iscas.ac= .cn >>>>>>> * [PATCH] netlink: fix skb refcount leak when dump start fails >>>>>>> >>>>>>> and found the following issues: >>>>>>> * KASAN: slab-use-after-free Read in nl80211_prepare_wdev_dump >>>>>>> * KASAN: slab-use-after-free Read in xfrm_dump_sa_done >>>>>>> * KASAN: slab-use-after-free Write in sk_skb_reason_drop >>>>>>> >>>>>>> Full report is available here: >>>>>>> https://ci.syzbot.org/series/8ed6f41d-0d02-4f1f-a7be-cc639c2b4cfd >>>>>>> >>>>>>> *** >>>>>>> >>>>>>> KASAN: slab-use-after-free Read in nl80211_prepare_wdev_dump >>>>>>> >>>>>>> tree: net >>>>>>> URL: https://kernel.googlesource.com/pub/scm/linux/kernel/git= /netdev/net.git >>>>>>> base: 18014147d3ee7831dce53fe65d7fc8d428b02552 >>>>>>> arch: amd64 >>>>>>> compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e2= 5a-1~exp1~20251221153213.50), Debian LLD 21.1.8 >>>>>>> config: https://ci.syzbot.org/builds/90c5185d-0dad-4c34-a563-425= 3ebb12eb2/config >>>>>>> syz repro: https://ci.syzbot.org/findings/0ad9835c-f631-4240-a3ad-2= 610bca3de33/syz_repro >>>>>>> >>>>>>> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D >>>>>>> BUG: KASAN: slab-use-after-free in __nlmsg_parse include/net/netlin= k.h:784 [inline] >>>>>>> BUG: KASAN: slab-use-after-free in nlmsg_parse_deprecated include/n= et/netlink.h:830 [inline] >>>>>>> BUG: KASAN: slab-use-after-free in nl80211_prepare_wdev_dump+0x634/= 0x680 net/wireless/nl80211.c:1245 >>>>>>> Read of size 4 at addr ffff88816e172d80 by task syz.0.17/5814 >>>>>>> >>>>>>> CPU: 1 UID: 0 PID: 5814 Comm: syz.0.17 Not tainted syzkaller #0 PRE= EMPT(full) >>>>>>> Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-deb= ian-1.16.2-1 04/01/2014 >>>>>>> Call Trace: >>>>>>> >>>>>>> dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 >>>>>>> print_address_description+0x55/0x1e0 mm/kasan/report.c:378 >>>>>>> print_report+0x58/0x70 mm/kasan/report.c:482 >>>>>>> kasan_report+0x117/0x150 mm/kasan/report.c:595 >>>>>>> __nlmsg_parse include/net/netlink.h:784 [inline] >>>>>>> nlmsg_parse_deprecated include/net/netlink.h:830 [inline] >>>>>>> nl80211_prepare_wdev_dump+0x634/0x680 net/wireless/nl80211.c:1245 >>>>>>> nl80211_dump_station+0x186/0xdb0 net/wireless/nl80211.c:8216 >>>>>>> genl_dumpit+0x10b/0x1b0 net/netlink/genetlink.c:1026 >>>>>>> netlink_dump+0x702/0xe10 net/netlink/af_netlink.c:2325 >>>>>>> netlink_recvmsg+0x690/0xa50 net/netlink/af_netlink.c:1976 >>>>>>> sock_recvmsg_nosec net/socket.c:1137 [inline] >>>>>>> sock_recvmsg+0x172/0x1b0 net/socket.c:1159 >>>>>>> __sys_recvfrom+0x240/0x3c0 net/socket.c:2315 >>>>>>> __do_sys_recvfrom net/socket.c:2330 [inline] >>>>>>> __se_sys_recvfrom net/socket.c:2326 [inline] >>>>>>> __x64_sys_recvfrom+0xde/0x100 net/socket.c:2326 >>>>>>> do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] >>>>>>> do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94 >>>>>>> entry_SYSCALL_64_after_hwframe+0x77/0x7f >>>>>>> RIP: 0033:0x7fd64155d68e >>>>>>> Code: 08 0f 85 a5 a8 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 8= 9 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 66 2e= 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08 >>>>>>> RSP: 002b:00007fd6424b5e88 EFLAGS: 00000246 ORIG_RAX: 0000000000000= 02d >>>>>>> RAX: ffffffffffffffda RBX: 00007fd6424b76c0 RCX: 00007fd64155d68e >>>>>>> RDX: 0000000000001000 RSI: 00007fd6424b6000 RDI: 0000000000000003 >>>>>>> RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 >>>>>>> R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003 >>>>>>> R13: 00007fd6424b5f58 R14: 00007fd6424b6000 R15: 0000000000000000 >>>>>>> >>>>>>> >>>>>>> Allocated by task 5813: >>>>>>> kasan_save_stack mm/kasan/common.c:57 [inline] >>>>>>> kasan_save_track+0x3e/0x80 mm/kasan/common.c:78 >>>>>>> unpoison_slab_object mm/kasan/common.c:340 [inline] >>>>>>> __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:366 >>>>>>> kasan_slab_alloc include/linux/kasan.h:253 [inline] >>>>>>> slab_post_alloc_hook mm/slub.c:4569 [inline] >>>>>>> slab_alloc_node mm/slub.c:4898 [inline] >>>>>>> kmem_cache_alloc_node_noprof+0x384/0x690 mm/slub.c:4950 >>>>>>> kmalloc_reserve net/core/skbuff.c:613 [inline] >>>>>>> __alloc_skb+0x27d/0x7d0 net/core/skbuff.c:713 >>>>>>> netlink_sendmsg+0x5d4/0xb40 net/netlink/af_netlink.c:1869 >>>>>>> sock_sendmsg_nosec net/socket.c:787 [inline] >>>>>>> __sock_sendmsg net/socket.c:802 [inline] >>>>>>> ____sys_sendmsg+0x972/0x9f0 net/socket.c:2698 >>>>>>> ___sys_sendmsg+0x2a5/0x360 net/socket.c:2752 >>>>>>> __sys_sendmsg net/socket.c:2784 [inline] >>>>>>> __do_sys_sendmsg net/socket.c:2789 [inline] >>>>>>> __se_sys_sendmsg net/socket.c:2787 [inline] >>>>>>> __x64_sys_sendmsg+0x1bd/0x2a0 net/socket.c:2787 >>>>>>> do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] >>>>>>> do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94 >>>>>>> entry_SYSCALL_64_after_hwframe+0x77/0x7f >>>>>>> >>>>>>> Freed by task 5813: >>>>>>> kasan_save_stack mm/kasan/common.c:57 [inline] >>>>>>> kasan_save_track+0x3e/0x80 mm/kasan/common.c:78 >>>>>>> kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:584 >>>>>>> poison_slab_object mm/kasan/common.c:253 [inline] >>>>>>> __kasan_slab_free+0x5c/0x80 mm/kasan/common.c:285 >>>>>>> kasan_slab_free include/linux/kasan.h:235 [inline] >>>>>>> slab_free_hook mm/slub.c:2689 [inline] >>>>>>> slab_free mm/slub.c:6250 [inline] >>>>>>> kfree+0x1c5/0x640 mm/slub.c:6565 >>>>>>> skb_kfree_head net/core/skbuff.c:1075 [inline] >>>>>>> skb_free_head net/core/skbuff.c:1087 [inline] >>>>>>> skb_release_data+0x828/0xa60 net/core/skbuff.c:1114 >>>>>>> skb_release_all net/core/skbuff.c:1189 [inline] >>>>>>> __kfree_skb+0x5d/0x210 net/core/skbuff.c:1203 >>>>>>> netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline] >>>>>>> netlink_unicast+0x764/0x8e0 net/netlink/af_netlink.c:1344 >>>>>>> netlink_sendmsg+0x813/0xb40 net/netlink/af_netlink.c:1894 >>>>>>> sock_sendmsg_nosec net/socket.c:787 [inline] >>>>>>> __sock_sendmsg net/socket.c:802 [inline] >>>>>>> ____sys_sendmsg+0x972/0x9f0 net/socket.c:2698 >>>>>>> ___sys_sendmsg+0x2a5/0x360 net/socket.c:2752 >>>>>>> __sys_sendmsg net/socket.c:2784 [inline] >>>>>>> __do_sys_sendmsg net/socket.c:2789 [inline] >>>>>>> __se_sys_sendmsg net/socket.c:2787 [inline] >>>>>>> __x64_sys_sendmsg+0x1bd/0x2a0 net/socket.c:2787 >>>>>>> do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] >>>>>>> do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94 >>>>>>> entry_SYSCALL_64_after_hwframe+0x77/0x7f >>>>>>> >>>>>>> The buggy address belongs to the object at ffff88816e172d80 >>>>>>> which belongs to the cache skbuff_small_head of size 704 >>>>>>> The buggy address is located 0 bytes inside of >>>>>>> freed 704-byte region [ffff88816e172d80, ffff88816e173040) >>>>>>> >>>>>>> The buggy address belongs to the physical page: >>>>>>> page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:= 0x16e170 >>>>>>> head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincou= nt:0 >>>>>>> flags: 0x57ff00000000040(head|node=3D1|zone=3D2|lastcpupid=3D0x7ff) >>>>>>> page_type: f5(slab) >>>>>>> raw: 057ff00000000040 ffff888160415140 dead000000000100 dead0000000= 00122 >>>>>>> raw: 0000000000000000 0000000800120012 00000000f5000000 00000000000= 00000 >>>>>>> head: 057ff00000000040 ffff888160415140 dead000000000100 dead000000= 000122 >>>>>>> head: 0000000000000000 0000000800120012 00000000f5000000 0000000000= 000000 >>>>>>> head: 057ff00000000002 ffffffffffffff01 00000000ffffffff 00000000ff= ffffff >>>>>>> head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000= 000004 >>>>>>> page dumped because: kasan: bad access detected >>>>>>> page_owner tracks the page as allocated >>>>>>> page last allocated via order 2, migratetype Unmovable, gfp_mask 0x= d2820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), p= id 5530, tgid 5530 (sshd), ts 47735478218, free_ts 34702748767 >>>>>>> set_page_owner include/linux/page_owner.h:32 [inline] >>>>>>> post_alloc_hook+0x22d/0x280 mm/page_alloc.c:1858 >>>>>>> prep_new_page mm/page_alloc.c:1866 [inline] >>>>>>> get_page_from_freelist+0x24ba/0x2540 mm/page_alloc.c:3946 >>>>>>> __alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5226 >>>>>>> alloc_slab_page mm/slub.c:3278 [inline] >>>>>>> allocate_slab+0x77/0x660 mm/slub.c:3467 >>>>>>> new_slab mm/slub.c:3525 [inline] >>>>>>> refill_objects+0x339/0x3d0 mm/slub.c:7271 >>>>>>> refill_sheaf mm/slub.c:2816 [inline] >>>>>>> __pcs_replace_empty_main+0x321/0x720 mm/slub.c:4651 >>>>>>> alloc_from_pcs mm/slub.c:4749 [inline] >>>>>>> slab_alloc_node mm/slub.c:4883 [inline] >>>>>>> kmem_cache_alloc_node_noprof+0x441/0x690 mm/slub.c:4950 >>>>>>> kmalloc_reserve net/core/skbuff.c:613 [inline] >>>>>>> __alloc_skb+0x27d/0x7d0 net/core/skbuff.c:713 >>>>>>> alloc_skb include/linux/skbuff.h:1383 [inline] >>>>>>> __tcp_send_ack+0xae/0x4f0 net/ipv4/tcp_output.c:4473 >>>>>>> tcp_cleanup_rbuf net/ipv4/tcp.c:1612 [inline] >>>>>>> tcp_recvmsg_locked+0x2dfa/0x3720 net/ipv4/tcp.c:2916 >>>>>>> tcp_recvmsg+0x205/0x7e0 net/ipv4/tcp.c:2945 >>>>>>> sock_recvmsg_nosec net/socket.c:1137 [inline] >>>>>>> sock_recvmsg+0x155/0x1b0 net/socket.c:1159 >>>>>>> sock_read_iter+0x251/0x320 net/socket.c:1229 >>>>>>> new_sync_read fs/read_write.c:493 [inline] >>>>>>> vfs_read+0x582/0xa70 fs/read_write.c:574 >>>>>>> ksys_read+0x150/0x270 fs/read_write.c:717 >>>>>>> do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] >>>>>>> do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94 >>>>>>> page last free pid 5059 tgid 5059 stack trace: >>>>>>> reset_page_owner include/linux/page_owner.h:25 [inline] >>>>>>> __free_pages_prepare mm/page_alloc.c:1402 [inline] >>>>>>> __free_frozen_pages+0xbc7/0xd30 mm/page_alloc.c:2943 >>>>>>> __slab_free+0x274/0x2c0 mm/slub.c:5612 >>>>>>> qlink_free mm/kasan/quarantine.c:163 [inline] >>>>>>> qlist_free_all+0x99/0x100 mm/kasan/quarantine.c:179 >>>>>>> kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286 >>>>>>> __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:350 >>>>>>> kasan_slab_alloc include/linux/kasan.h:253 [inline] >>>>>>> slab_post_alloc_hook mm/slub.c:4569 [inline] >>>>>>> slab_alloc_node mm/slub.c:4898 [inline] >>>>>>> __do_kmalloc_node mm/slub.c:5294 [inline] >>>>>>> __kvmalloc_node_noprof+0x4d7/0x8a0 mm/slub.c:6832 >>>>>>> seq_buf_alloc fs/seq_file.c:39 [inline] >>>>>>> seq_read_iter+0x202/0xe10 fs/seq_file.c:211 >>>>>>> new_sync_read fs/read_write.c:493 [inline] >>>>>>> vfs_read+0x582/0xa70 fs/read_write.c:574 >>>>>>> ksys_read+0x150/0x270 fs/read_write.c:717 >>>>>>> do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] >>>>>>> do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94 >>>>>>> entry_SYSCALL_64_after_hwframe+0x77/0x7f >>>>>>> >>>>>>> Memory state around the buggy address: >>>>>>> ffff88816e172c80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc >>>>>>> ffff88816e172d00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >>>>>>> >ffff88816e172d80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >>>>>>> ^ >>>>>>> ffff88816e172e00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >>>>>>> ffff88816e172e80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >>>>>>> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D >>>>>>> >>>>>>> >>>>>>> *** >>>>>>> >>>>>>> KASAN: slab-use-after-free Read in xfrm_dump_sa_done >>>>>>> >>>>>>> tree: net >>>>>>> URL: https://kernel.googlesource.com/pub/scm/linux/kernel/git= /netdev/net.git >>>>>>> base: 18014147d3ee7831dce53fe65d7fc8d428b02552 >>>>>>> arch: amd64 >>>>>>> compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e2= 5a-1~exp1~20251221153213.50), Debian LLD 21.1.8 >>>>>>> config: https://ci.syzbot.org/builds/90c5185d-0dad-4c34-a563-425= 3ebb12eb2/config >>>>>>> syz repro: https://ci.syzbot.org/findings/53579ff8-1479-4e0c-ae08-2= f1ea756ee1b/syz_repro >>>>>>> >>>>>>> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D >>>>>>> BUG: KASAN: slab-use-after-free in xfrm_dump_sa_done+0x54/0xd0 net/= xfrm/xfrm_user.c:1491 >>>>>>> Read of size 8 at addr ffff888167305398 by task syz.0.17/5812 >>>>>>> >>>>>>> CPU: 1 UID: 0 PID: 5812 Comm: syz.0.17 Not tainted syzkaller #0 PRE= EMPT(full) >>>>>>> Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-deb= ian-1.16.2-1 04/01/2014 >>>>>>> Call Trace: >>>>>>> >>>>>>> dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 >>>>>>> print_address_description+0x55/0x1e0 mm/kasan/report.c:378 >>>>>>> print_report+0x58/0x70 mm/kasan/report.c:482 >>>>>>> kasan_report+0x117/0x150 mm/kasan/report.c:595 >>>>>>> xfrm_dump_sa_done+0x54/0xd0 net/xfrm/xfrm_user.c:1491 >>>>>>> netlink_release+0x12c8/0x1ad0 net/netlink/af_netlink.c:768 >>>>>>> __sock_release net/socket.c:722 [inline] >>>>>>> sock_close+0xc3/0x240 net/socket.c:1514 >>>>>>> __fput+0x44f/0xa60 fs/file_table.c:510 >>>>>>> task_work_run+0x1d9/0x270 kernel/task_work.c:233 >>>>>>> resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] >>>>>>> __exit_to_user_mode_loop kernel/entry/common.c:67 [inline] >>>>>>> exit_to_user_mode_loop+0xf3/0x4d0 kernel/entry/common.c:98 >>>>>>> __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [= inline] >>>>>>> syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h= :230 [inline] >>>>>>> syscall_exit_to_user_mode include/linux/entry-common.h:318 [inline= ] >>>>>>> do_syscall_64+0x33e/0xf80 arch/x86/entry/syscall_64.c:100 >>>>>>> entry_SYSCALL_64_after_hwframe+0x77/0x7f >>>>>>> RIP: 0033:0x7fe50bf9ce59 >>>>>>> Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 4= 8 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01= f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 >>>>>>> RSP: 002b:00007fff8a02cc38 EFLAGS: 00000246 ORIG_RAX: 0000000000000= 1b4 >>>>>>> RAX: 0000000000000000 RBX: 00007fe50c217da0 RCX: 00007fe50bf9ce59 >>>>>>> RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 >>>>>>> RBP: 00007fe50c217da0 R08: 00007fe50c216038 R09: 0000000000000000 >>>>>>> R10: 000000000003fdd4 R11: 0000000000000246 R12: 0000000000010018 >>>>>>> R13: 00007fe50c215fac R14: 00007fe50c215fa8 R15: 00007fe50c215fa0 >>>>>>> >>>>>>> >>>>>>> Allocated by task 5813: >>>>>>> kasan_save_stack mm/kasan/common.c:57 [inline] >>>>>>> kasan_save_track+0x3e/0x80 mm/kasan/common.c:78 >>>>>>> unpoison_slab_object mm/kasan/common.c:340 [inline] >>>>>>> __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:366 >>>>>>> kasan_slab_alloc include/linux/kasan.h:253 [inline] >>>>>>> slab_post_alloc_hook mm/slub.c:4569 [inline] >>>>>>> slab_alloc_node mm/slub.c:4898 [inline] >>>>>>> kmem_cache_alloc_node_noprof+0x384/0x690 mm/slub.c:4950 >>>>>>> __alloc_skb+0x1d0/0x7d0 net/core/skbuff.c:702 >>>>>>> netlink_sendmsg+0x5d4/0xb40 net/netlink/af_netlink.c:1869 >>>>>>> sock_sendmsg_nosec net/socket.c:787 [inline] >>>>>>> __sock_sendmsg net/socket.c:802 [inline] >>>>>>> ____sys_sendmsg+0x972/0x9f0 net/socket.c:2698 >>>>>>> ___sys_sendmsg+0x2a5/0x360 net/socket.c:2752 >>>>>>> __sys_sendmsg net/socket.c:2784 [inline] >>>>>>> __do_sys_sendmsg net/socket.c:2789 [inline] >>>>>>> __se_sys_sendmsg net/socket.c:2787 [inline] >>>>>>> __x64_sys_sendmsg+0x1bd/0x2a0 net/socket.c:2787 >>>>>>> do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] >>>>>>> do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94 >>>>>>> entry_SYSCALL_64_after_hwframe+0x77/0x7f >>>>>>> >>>>>>> Freed by task 5813: >>>>>>> kasan_save_stack mm/kasan/common.c:57 [inline] >>>>>>> kasan_save_track+0x3e/0x80 mm/kasan/common.c:78 >>>>>>> kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:584 >>>>>>> poison_slab_object mm/kasan/common.c:253 [inline] >>>>>>> __kasan_slab_free+0x5c/0x80 mm/kasan/common.c:285 >>>>>>> kasan_slab_free include/linux/kasan.h:235 [inline] >>>>>>> slab_free_hook mm/slub.c:2689 [inline] >>>>>>> slab_free mm/slub.c:6250 [inline] >>>>>>> kmem_cache_free+0x182/0x650 mm/slub.c:6377 >>>>>>> netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline] >>>>>>> netlink_unicast+0x764/0x8e0 net/netlink/af_netlink.c:1344 >>>>>>> netlink_sendmsg+0x813/0xb40 net/netlink/af_netlink.c:1894 >>>>>>> sock_sendmsg_nosec net/socket.c:787 [inline] >>>>>>> __sock_sendmsg net/socket.c:802 [inline] >>>>>>> ____sys_sendmsg+0x972/0x9f0 net/socket.c:2698 >>>>>>> ___sys_sendmsg+0x2a5/0x360 net/socket.c:2752 >>>>>>> __sys_sendmsg net/socket.c:2784 [inline] >>>>>>> __do_sys_sendmsg net/socket.c:2789 [inline] >>>>>>> __se_sys_sendmsg net/socket.c:2787 [inline] >>>>>>> __x64_sys_sendmsg+0x1bd/0x2a0 net/socket.c:2787 >>>>>>> do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] >>>>>>> do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94 >>>>>>> entry_SYSCALL_64_after_hwframe+0x77/0x7f >>>>>>> >>>>>>> The buggy address belongs to the object at ffff888167305380 >>>>>>> which belongs to the cache skbuff_head_cache of size 240 >>>>>>> The buggy address is located 24 bytes inside of >>>>>>> freed 240-byte region [ffff888167305380, ffff888167305470) >>>>>>> >>>>>>> The buggy address belongs to the physical page: >>>>>>> page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:= 0x167304 >>>>>>> head: order:1 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincou= nt:0 >>>>>>> flags: 0x57ff00000000040(head|node=3D1|zone=3D2|lastcpupid=3D0x7ff) >>>>>>> page_type: f5(slab) >>>>>>> raw: 057ff00000000040 ffff888160416dc0 dead000000000100 dead0000000= 00122 >>>>>>> raw: 0000000000000000 0000000800150015 00000000f5000000 00000000000= 00000 >>>>>>> head: 057ff00000000040 ffff888160416dc0 dead000000000100 dead000000= 000122 >>>>>>> head: 0000000000000000 0000000800150015 00000000f5000000 0000000000= 000000 >>>>>>> head: 057ff00000000001 ffffffffffffff81 00000000ffffffff 00000000ff= ffffff >>>>>>> head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000= 000002 >>>>>>> page dumped because: kasan: bad access detected >>>>>>> page_owner tracks the page as allocated >>>>>>> page last allocated via order 1, migratetype Unmovable, gfp_mask 0x= d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMAL= LOC), pid 5813, tgid 5812 (syz.0.17), ts 64859679564, free_ts 63312613640 >>>>>>> set_page_owner include/linux/page_owner.h:32 [inline] >>>>>>> post_alloc_hook+0x22d/0x280 mm/page_alloc.c:1858 >>>>>>> prep_new_page mm/page_alloc.c:1866 [inline] >>>>>>> get_page_from_freelist+0x24ba/0x2540 mm/page_alloc.c:3946 >>>>>>> __alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5226 >>>>>>> alloc_slab_page mm/slub.c:3278 [inline] >>>>>>> allocate_slab+0x77/0x660 mm/slub.c:3467 >>>>>>> new_slab mm/slub.c:3525 [inline] >>>>>>> refill_objects+0x339/0x3d0 mm/slub.c:7271 >>>>>>> refill_sheaf mm/slub.c:2816 [inline] >>>>>>> __pcs_replace_empty_main+0x321/0x720 mm/slub.c:4651 >>>>>>> alloc_from_pcs mm/slub.c:4749 [inline] >>>>>>> slab_alloc_node mm/slub.c:4883 [inline] >>>>>>> kmem_cache_alloc_node_noprof+0x441/0x690 mm/slub.c:4950 >>>>>>> __alloc_skb+0x1d0/0x7d0 net/core/skbuff.c:702 >>>>>>> netlink_sendmsg+0x5d4/0xb40 net/netlink/af_netlink.c:1869 >>>>>>> sock_sendmsg_nosec net/socket.c:787 [inline] >>>>>>> __sock_sendmsg net/socket.c:802 [inline] >>>>>>> ____sys_sendmsg+0x972/0x9f0 net/socket.c:2698 >>>>>>> ___sys_sendmsg+0x2a5/0x360 net/socket.c:2752 >>>>>>> __sys_sendmsg net/socket.c:2784 [inline] >>>>>>> __do_sys_sendmsg net/socket.c:2789 [inline] >>>>>>> __se_sys_sendmsg net/socket.c:2787 [inline] >>>>>>> __x64_sys_sendmsg+0x1bd/0x2a0 net/socket.c:2787 >>>>>>> do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] >>>>>>> do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94 >>>>>>> entry_SYSCALL_64_after_hwframe+0x77/0x7f >>>>>>> page last free pid 15 tgid 15 stack trace: >>>>>>> reset_page_owner include/linux/page_owner.h:25 [inline] >>>>>>> __free_pages_prepare mm/page_alloc.c:1402 [inline] >>>>>>> __free_frozen_pages+0xbc7/0xd30 mm/page_alloc.c:2943 >>>>>>> rcu_do_batch kernel/rcu/tree.c:2617 [inline] >>>>>>> rcu_core+0x7cd/0x1070 kernel/rcu/tree.c:2869 >>>>>>> handle_softirqs+0x22a/0x840 kernel/softirq.c:622 >>>>>>> run_ksoftirqd+0x36/0x60 kernel/softirq.c:1076 >>>>>>> smpboot_thread_fn+0x541/0xa50 kernel/smpboot.c:160 >>>>>>> kthread+0x389/0x470 kernel/kthread.c:436 >>>>>>> ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 >>>>>>> ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 >>>>>>> >>>>>>> Memory state around the buggy address: >>>>>>> ffff888167305280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc >>>>>>> ffff888167305300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >>>>>>> >ffff888167305380: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >>>>>>> ^ >>>>>>> ffff888167305400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc >>>>>>> ffff888167305480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >>>>>>> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D >>>>>>> >>>>>>> >>>>>>> *** >>>>>>> >>>>>>> KASAN: slab-use-after-free Write in sk_skb_reason_drop >>>>>>> >>>>>>> tree: net >>>>>>> URL: https://kernel.googlesource.com/pub/scm/linux/kernel/git= /netdev/net.git >>>>>>> base: 18014147d3ee7831dce53fe65d7fc8d428b02552 >>>>>>> arch: amd64 >>>>>>> compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e2= 5a-1~exp1~20251221153213.50), Debian LLD 21.1.8 >>>>>>> config: https://ci.syzbot.org/builds/90c5185d-0dad-4c34-a563-425= 3ebb12eb2/config >>>>>>> syz repro: https://ci.syzbot.org/findings/c87569e1-d26e-4670-a17b-9= f2f64a5af67/syz_repro >>>>>>> >>>>>>> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D >>>>>>> BUG: KASAN: slab-use-after-free in instrument_atomic_read_write inc= lude/linux/instrumented.h:112 [inline] >>>>>>> BUG: KASAN: slab-use-after-free in atomic_fetch_sub_release include= /linux/atomic/atomic-instrumented.h:400 [inline] >>>>>>> BUG: KASAN: slab-use-after-free in __refcount_sub_and_test include/= linux/refcount.h:389 [inline] >>>>>>> BUG: KASAN: slab-use-after-free in __refcount_dec_and_test include/= linux/refcount.h:432 [inline] >>>>>>> BUG: KASAN: slab-use-after-free in refcount_dec_and_test include/li= nux/refcount.h:450 [inline] >>>>>>> BUG: KASAN: slab-use-after-free in skb_unref include/linux/skbuff.h= :1292 [inline] >>>>>>> BUG: KASAN: slab-use-after-free in __sk_skb_reason_drop net/core/sk= buff.c:1212 [inline] >>>>>>> BUG: KASAN: slab-use-after-free in sk_skb_reason_drop+0x37/0x110 ne= t/core/skbuff.c:1240 >>>>>>> Write of size 4 at addr ffff8881178efee4 by task syz.1.18/5873 >>>>>>> >>>>>>> CPU: 0 UID: 0 PID: 5873 Comm: syz.1.18 Not tainted syzkaller #0 PRE= EMPT(full) >>>>>>> Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-deb= ian-1.16.2-1 04/01/2014 >>>>>>> Call Trace: >>>>>>> >>>>>>> dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 >>>>>>> print_address_description+0x55/0x1e0 mm/kasan/report.c:378 >>>>>>> print_report+0x58/0x70 mm/kasan/report.c:482 >>>>>>> kasan_report+0x117/0x150 mm/kasan/report.c:595 >>>>>>> check_region_inline mm/kasan/generic.c:-1 [inline] >>>>>>> kasan_check_range+0x264/0x2c0 mm/kasan/generic.c:200 >>>>>>> instrument_atomic_read_write include/linux/instrumented.h:112 [inl= ine] >>>>>>> atomic_fetch_sub_release include/linux/atomic/atomic-instrumented.= h:400 [inline] >>>>>>> __refcount_sub_and_test include/linux/refcount.h:389 [inline] >>>>>>> __refcount_dec_and_test include/linux/refcount.h:432 [inline] >>>>>>> refcount_dec_and_test include/linux/refcount.h:450 [inline] >>>>>>> skb_unref include/linux/skbuff.h:1292 [inline] >>>>>>> __sk_skb_reason_drop net/core/skbuff.c:1212 [inline] >>>>>>> sk_skb_reason_drop+0x37/0x110 net/core/skbuff.c:1240 >>>>>>> kfree_skb_reason include/linux/skbuff.h:1322 [inline] >>>>>>> kfree_skb include/linux/skbuff.h:1331 [inline] >>>>>>> netlink_release+0x133a/0x1ad0 net/netlink/af_netlink.c:770 >>>>>>> __sock_release net/socket.c:722 [inline] >>>>>>> sock_close+0xc3/0x240 net/socket.c:1514 >>>>>>> __fput+0x44f/0xa60 fs/file_table.c:510 >>>>>>> task_work_run+0x1d9/0x270 kernel/task_work.c:233 >>>>>>> resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] >>>>>>> __exit_to_user_mode_loop kernel/entry/common.c:67 [inline] >>>>>>> exit_to_user_mode_loop+0xf3/0x4d0 kernel/entry/common.c:98 >>>>>>> __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [= inline] >>>>>>> syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h= :230 [inline] >>>>>>> syscall_exit_to_user_mode include/linux/entry-common.h:318 [inline= ] >>>>>>> do_syscall_64+0x33e/0xf80 arch/x86/entry/syscall_64.c:100 >>>>>>> entry_SYSCALL_64_after_hwframe+0x77/0x7f >>>>>>> RIP: 0033:0x7fd4d139ce59 >>>>>>> Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 4= 8 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01= f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 >>>>>>> RSP: 002b:00007fff722ecbf8 EFLAGS: 00000246 ORIG_RAX: 0000000000000= 1b4 >>>>>>> RAX: 0000000000000000 RBX: 00007fff722ecce0 RCX: 00007fd4d139ce59 >>>>>>> RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 >>>>>>> RBP: 0000000000012825 R08: 0000000000000001 R09: 0000000000000000 >>>>>>> R10: 0000001b32e20000 R11: 0000000000000246 R12: 00007fff722ecd20 >>>>>>> R13: 00007fd4d1615fac R14: 0000000000012859 R15: 00007fd4d1615fa0 >>>>>>> >>>>>>> >>>>>>> Allocated by task 5874: >>>>>>> kasan_save_stack mm/kasan/common.c:57 [inline] >>>>>>> kasan_save_track+0x3e/0x80 mm/kasan/common.c:78 >>>>>>> unpoison_slab_object mm/kasan/common.c:340 [inline] >>>>>>> __kasan_mempool_unpoison_object+0xa3/0x130 mm/kasan/common.c:564 >>>>>>> kasan_mempool_unpoison_object include/linux/kasan.h:391 [inline] >>>>>>> napi_skb_cache_get+0x3c8/0x780 net/core/skbuff.c:306 >>>>>>> __alloc_skb+0x19a/0x7d0 net/core/skbuff.c:696 >>>>>>> netlink_sendmsg+0x5d4/0xb40 net/netlink/af_netlink.c:1869 >>>>>>> sock_sendmsg_nosec net/socket.c:787 [inline] >>>>>>> __sock_sendmsg net/socket.c:802 [inline] >>>>>>> __sys_sendto+0x672/0x710 net/socket.c:2265 >>>>>>> __do_sys_sendto net/socket.c:2272 [inline] >>>>>>> __se_sys_sendto net/socket.c:2268 [inline] >>>>>>> __x64_sys_sendto+0xde/0x100 net/socket.c:2268 >>>>>>> do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] >>>>>>> do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94 >>>>>>> entry_SYSCALL_64_after_hwframe+0x77/0x7f >>>>>>> >>>>>>> Freed by task 5874: >>>>>>> kasan_save_stack mm/kasan/common.c:57 [inline] >>>>>>> kasan_save_track+0x3e/0x80 mm/kasan/common.c:78 >>>>>>> kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:584 >>>>>>> poison_slab_object mm/kasan/common.c:253 [inline] >>>>>>> __kasan_slab_free+0x5c/0x80 mm/kasan/common.c:285 >>>>>>> kasan_slab_free include/linux/kasan.h:235 [inline] >>>>>>> slab_free_hook mm/slub.c:2689 [inline] >>>>>>> slab_free mm/slub.c:6250 [inline] >>>>>>> kmem_cache_free+0x182/0x650 mm/slub.c:6377 >>>>>>> netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline] >>>>>>> netlink_unicast+0x764/0x8e0 net/netlink/af_netlink.c:1344 >>>>>>> netlink_sendmsg+0x813/0xb40 net/netlink/af_netlink.c:1894 >>>>>>> sock_sendmsg_nosec net/socket.c:787 [inline] >>>>>>> __sock_sendmsg net/socket.c:802 [inline] >>>>>>> __sys_sendto+0x672/0x710 net/socket.c:2265 >>>>>>> __do_sys_sendto net/socket.c:2272 [inline] >>>>>>> __se_sys_sendto net/socket.c:2268 [inline] >>>>>>> __x64_sys_sendto+0xde/0x100 net/socket.c:2268 >>>>>>> do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] >>>>>>> do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94 >>>>>>> entry_SYSCALL_64_after_hwframe+0x77/0x7f >>>>>>> >>>>>>> The buggy address belongs to the object at ffff8881178efe00 >>>>>>> which belongs to the cache skbuff_head_cache of size 240 >>>>>>> The buggy address is located 228 bytes inside of >>>>>>> freed 240-byte region [ffff8881178efe00, ffff8881178efef0) >>>>>>> >>>>>>> The buggy address belongs to the physical page: >>>>>>> page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:= 0x1178ee >>>>>>> head: order:1 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincou= nt:0 >>>>>>> flags: 0x17ff00000000040(head|node=3D0|zone=3D2|lastcpupid=3D0x7ff) >>>>>>> page_type: f5(slab) >>>>>>> raw: 017ff00000000040 ffff888160416c80 dead000000000122 00000000000= 00000 >>>>>>> raw: 0000000000000000 0000000800150015 00000000f5000000 00000000000= 00000 >>>>>>> head: 017ff00000000040 ffff888160416c80 dead000000000122 0000000000= 000000 >>>>>>> head: 0000000000000000 0000000800150015 00000000f5000000 0000000000= 000000 >>>>>>> head: 017ff00000000001 ffffffffffffff81 00000000ffffffff 00000000ff= ffffff >>>>>>> head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000= 000002 >>>>>>> page dumped because: kasan: bad access detected >>>>>>> page_owner tracks the page as allocated >>>>>>> page last allocated via order 1, migratetype Unmovable, gfp_mask 0x= d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMAL= LOC), pid 5050, tgid 5050 (klogd), ts 75887265953, free_ts 75876344896 >>>>>>> set_page_owner include/linux/page_owner.h:32 [inline] >>>>>>> post_alloc_hook+0x22d/0x280 mm/page_alloc.c:1858 >>>>>>> prep_new_page mm/page_alloc.c:1866 [inline] >>>>>>> get_page_from_freelist+0x24ba/0x2540 mm/page_alloc.c:3946 >>>>>>> __alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5226 >>>>>>> alloc_slab_page mm/slub.c:3278 [inline] >>>>>>> allocate_slab+0x77/0x660 mm/slub.c:3467 >>>>>>> new_slab mm/slub.c:3525 [inline] >>>>>>> refill_objects+0x339/0x3d0 mm/slub.c:7271 >>>>>>> refill_sheaf mm/slub.c:2816 [inline] >>>>>>> __pcs_replace_empty_main+0x321/0x720 mm/slub.c:4651 >>>>>>> alloc_from_pcs mm/slub.c:4749 [inline] >>>>>>> slab_alloc_node mm/slub.c:4883 [inline] >>>>>>> kmem_cache_alloc_node_noprof+0x441/0x690 mm/slub.c:4950 >>>>>>> __alloc_skb+0x1d0/0x7d0 net/core/skbuff.c:702 >>>>>>> alloc_skb include/linux/skbuff.h:1383 [inline] >>>>>>> alloc_skb_with_frags+0xc8/0x760 net/core/skbuff.c:6743 >>>>>>> sock_alloc_send_pskb+0x878/0x990 net/core/sock.c:2998 >>>>>>> unix_dgram_sendmsg+0x460/0x18d0 net/unix/af_unix.c:2141 >>>>>>> sock_sendmsg_nosec net/socket.c:787 [inline] >>>>>>> __sock_sendmsg net/socket.c:802 [inline] >>>>>>> __sys_sendto+0x672/0x710 net/socket.c:2265 >>>>>>> __do_sys_sendto net/socket.c:2272 [inline] >>>>>>> __se_sys_sendto net/socket.c:2268 [inline] >>>>>>> __x64_sys_sendto+0xde/0x100 net/socket.c:2268 >>>>>>> do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] >>>>>>> do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94 >>>>>>> entry_SYSCALL_64_after_hwframe+0x77/0x7f >>>>>>> page last free pid 0 tgid 0 stack trace: >>>>>>> reset_page_owner include/linux/page_owner.h:25 [inline] >>>>>>> __free_pages_prepare mm/page_alloc.c:1402 [inline] >>>>>>> __free_frozen_pages+0xbc7/0xd30 mm/page_alloc.c:2943 >>>>>>> rcu_do_batch kernel/rcu/tree.c:2617 [inline] >>>>>>> rcu_core+0x7cd/0x1070 kernel/rcu/tree.c:2869 >>>>>>> handle_softirqs+0x22a/0x840 kernel/softirq.c:622 >>>>>>> __do_softirq kernel/softirq.c:656 [inline] >>>>>>> invoke_softirq kernel/softirq.c:496 [inline] >>>>>>> __irq_exit_rcu+0xca/0x220 kernel/softirq.c:735 >>>>>>> irq_exit_rcu+0x9/0x30 kernel/softirq.c:752 >>>>>>> instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1061= [inline] >>>>>>> sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:= 1061 >>>>>>> asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idt= entry.h:697 >>>>>>> >>>>>>> Memory state around the buggy address: >>>>>>> ffff8881178efd80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >>>>>>> ffff8881178efe00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >>>>>>> >ffff8881178efe80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc >>>>>>> ^ >>>>>>> ffff8881178eff00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >>>>>>> ffff8881178eff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >>>>>>> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D >>>>>>> >>>>>>> >>>>>>> *** >>>>>>> >>>>>>> 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. >>>>>>> >>>>>>> To test a patch for this bug, please reply with `#syz test` >>>>>>> (should be on a separate line). >>>>>>> >>>>>>> The patch should be attached to the email. >>>>>>> Note: arguments like custom git repos and branches are not supporte= d. >>>>>>> >>>>>>> The email will later be sent to: >>>>>>> [davem@davemloft.net edumazet@google.com horms@kernel.org kees@kern= el.org kuba@kernel.org kuniyu@google.com linux-kernel@vger.kernel.org netde= v@vger.kernel.org pabeni@redhat.com stable@vger.kernel.org vulab@iscas.ac.c= n yangfeng@kylinos.cn] >>>>>>> >>>>>>> If the report looks fine to you, reply with: >>>>>>> #syz upstream >>>>>>> >>>>>>> If the report is a false positive, reply with >>>>>>> #syz invalid >>>>>>> >>>>>>> -- >>>>>>> You received this message because you are subscribed to the Google = Groups "syzkaller-upstream-moderation" group. >>>>>>> To unsubscribe from this group and stop receiving emails from it, s= end an email to syzkaller-upstream-moderation+unsubscribe@googlegroups.com. >>>>>>> To view this discussion visit https://groups.google.com/d/msgid/syz= kaller-upstream-moderation/6a185386.99a1ea37.128423.0001.GAE%40google.com. >>>>> >>>>> --=20 >>>>> You received this message because you are subscribed to the Google Gr= oups "syzkaller-upstream-moderation" group. >>>>> To unsubscribe from this group and stop receiving emails from it, sen= d an email to syzkaller-upstream-moderation+unsubscribe@googlegroups.com. >>>>> To view this discussion visit https://groups.google.com/d/msgid/syzka= ller-upstream-moderation/6a18555e.e783d627.6395.0001.GAE%40google.com. >>>> >>>> I see the command but can't find the corresponding bug. >>>> The email is sent to syzbot+HASH@syzkaller.appspotmail.com address >>>> but the HASH does not correspond to any known bug. >>>> Please double check the address. >>>> >>> >>> I see the command but can't find the corresponding bug. >>> The email is sent to syzbot+HASH@syzkaller.appspotmail.com address >>> but the HASH does not correspond to any known bug. >>> Please double check the address. >>> >>> --=20 >>> You received this message because you are subscribed to the Google Grou= ps "syzkaller-upstream-moderation" group. >>> To unsubscribe from this group and stop receiving emails from it, send = an email to syzkaller-upstream-moderation+unsubscribe@googlegroups.com. >>> To view this discussion visit https://groups.google.com/d/msgid/syzkall= er-upstream-moderation/6a185561.7f45b5d1.9d2a9.0005.GAE%40google.com. >> >> I see the command but can't find the corresponding bug. >> The email is sent to syzbot+HASH@syzkaller.appspotmail.com address >> but the HASH does not correspond to any known bug. >> Please double check the address. >> > > I see the command but can't find the corresponding bug. > The email is sent to syzbot+HASH@syzkaller.appspotmail.com address > but the HASH does not correspond to any known bug. > Please double check the address. > I see the command but can't find the corresponding bug. The email is sent to syzbot+HASH@syzkaller.appspotmail.com address but the HASH does not correspond to any known bug. Please double check the address.