From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-ot1-f72.google.com (mail-ot1-f72.google.com [209.85.210.72]) (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 BE63641C30A for ; Thu, 28 May 2026 14:55:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.72 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779980106; cv=none; b=kR5kMYY/g+rkWABttNX0nkQvW0eykdGGn4f9vlSEwX3qsW0kNzmJrd1Bw2Eyf5xVn14qkZDMwH/7yMOrMCV4G6iBOO+eGyJRG2ETSNMYXdCo+kgxmokbTnZb2hhcx8J3qk3FDqSpemj/srhGctkpyL7xngzfVef75GbJAyoY7zQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779980106; c=relaxed/simple; bh=NdbaXP8aYtXXkK8z6Wgfokp/KGslYGHOGpSongLRZRg=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To:Cc: Content-Type; b=OHvoWGo4HNXcuy6ViASEsQnMJR7dgUcRyvD2CiNjTDjq0/apvQ7wYBw4NNdqSG40TL3tPPc6zpgxsDXXFDZFPtHYybUDvt671T6X4KGDQV6+jKL8O5wKZpGjVSgGG0rJsofs6piUJAAdQbdbSww3wRo0TrefEuEzU3Bu5b94YOU= 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=209.85.210.72 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-ot1-f72.google.com with SMTP id 46e09a7af769-7e60737a964so7080946a34.3 for ; Thu, 28 May 2026 07:55:05 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1779980101; x=1780584901; 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=tqujM5UIiq73dI+l7zjJmNmtW+vnaFTUC+gKi09JegU=; b=elRn0iVJvvZPd3u7eY7oQjgjiaijJHnGm8/Ul/GppSWey6z7oYnSWNZ7adc4uVu2Us ZmbZwNFSVchIj8xRvN/axEN2JMskAck2Co7BUnSf0Btkqwbiwggr1K5OPYcE7aEUsNBE OTANMysf5Kz5LOraPbgVtzvp0xDgc3MX8/XfzM4YBqR780suv1EA3OmxCmRIJwd86qaW 8QiBcqD7fx0w6XIQ6CFI28/s2seUQi5KYS05wUh1Udtn/5ix9BwhUQezq5frhQtaXn9v rFED4KcPFDQlyBa1fekF7XOehw11HyTRhNI4pXoliOP/MEv+j2tFj8dcT+PeO4xh8hAW vPtg== X-Forwarded-Encrypted: i=1; AFNElJ+Bvfcdj4Nv4FoQtBDTWQXWaBDMh2VVIgoY/+CsaCgukKJPJBfJhEKQOHstigXJrpfYaa70QnU=@lists.linux.dev X-Gm-Message-State: AOJu0YxiE/gxkkHEXeO6nGO3iAjvwTsJnu89wNX9vUtbsZHgY5NHql1I e9idZXeppNqoMSb88Kol9UcTWK2INob+HI+zTO5b4do0vMs0OWKBccUNteykH9VAH5yKBmFju7Z fUfN61kEKFVwAfrLgBlyadggqmczKo/Adf+zhYwV6Igf5vAGfhNG3aQOU52U= Precedence: bulk X-Mailing-List: syzbot@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:1791:b0:69d:9153:56ef with SMTP id 006d021491bc7-69d915363aemr13219749eaf.17.1779979630958; Thu, 28 May 2026 07:47:10 -0700 (PDT) Date: Thu, 28 May 2026 07:47:10 -0700 In-Reply-To: <6a18556e.99a1ea37.128423.008f.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a18556e.b6d9d2ce.2aaec5.00ae.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@googleg= roups.com. >>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>> On Thu, May 28, 2026 at 4:39=E2=80=AFPM syzbot ci >>>>>>>>>>>>>>>>>>> w= rote: >>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>> syzbot ci has tested the following series >>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>> [v1] netlink: fix skb refcount leak when dump start fa= ils >>>>>>>>>>>>>>>>>>>> https://lore.kernel.org/all/20260528073614.1169858-1-v= ulab@iscas.ac.cn >>>>>>>>>>>>>>>>>>>> * [PATCH] netlink: fix skb refcount leak when dump sta= rt fails >>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>> and found the following issues: >>>>>>>>>>>>>>>>>>>> * KASAN: slab-use-after-free Read in nl80211_prepare_w= dev_dump >>>>>>>>>>>>>>>>>>>> * KASAN: slab-use-after-free Read in xfrm_dump_sa_done >>>>>>>>>>>>>>>>>>>> * KASAN: slab-use-after-free Write in sk_skb_reason_dr= op >>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>> Full report is available here: >>>>>>>>>>>>>>>>>>>> https://ci.syzbot.org/series/8ed6f41d-0d02-4f1f-a7be-c= c639c2b4cfd >>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>> *** >>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>> KASAN: slab-use-after-free Read in nl80211_prepare_wde= v_dump >>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>> tree: net >>>>>>>>>>>>>>>>>>>> URL: https://kernel.googlesource.com/pub/scm/lin= ux/kernel/git/netdev/net.git >>>>>>>>>>>>>>>>>>>> base: 18014147d3ee7831dce53fe65d7fc8d428b02552 >>>>>>>>>>>>>>>>>>>> arch: amd64 >>>>>>>>>>>>>>>>>>>> compiler: Debian clang version 21.1.8 (++202512210330= 36+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8 >>>>>>>>>>>>>>>>>>>> config: https://ci.syzbot.org/builds/90c5185d-0dad-= 4c34-a563-4253ebb12eb2/config >>>>>>>>>>>>>>>>>>>> syz repro: https://ci.syzbot.org/findings/0ad9835c-f63= 1-4240-a3ad-2610bca3de33/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 inclu= de/net/netlink.h:784 [inline] >>>>>>>>>>>>>>>>>>>> BUG: KASAN: slab-use-after-free in nlmsg_parse_depreca= ted include/net/netlink.h:830 [inline] >>>>>>>>>>>>>>>>>>>> BUG: KASAN: slab-use-after-free in nl80211_prepare_wde= v_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 syz= kaller #0 PREEMPT(full) >>>>>>>>>>>>>>>>>>>> Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BI= OS 1.16.2-debian-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 [inl= ine] >>>>>>>>>>>>>>>>>>>> nl80211_prepare_wdev_dump+0x634/0x680 net/wireless/nl= 80211.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:232= 5 >>>>>>>>>>>>>>>>>>>> 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 89 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: = 000000000000002d >>>>>>>>>>>>>>>>>>>> RAX: ffffffffffffffda RBX: 00007fd6424b76c0 RCX: 00007= fd64155d68e >>>>>>>>>>>>>>>>>>>> RDX: 0000000000001000 RSI: 00007fd6424b6000 RDI: 00000= 00000000003 >>>>>>>>>>>>>>>>>>>> RBP: 0000000000000000 R08: 0000000000000000 R09: 00000= 00000000000 >>>>>>>>>>>>>>>>>>>> R10: 0000000000000000 R11: 0000000000000246 R12: 00000= 00000000003 >>>>>>>>>>>>>>>>>>>> R13: 00007fd6424b5f58 R14: 00007fd6424b6000 R15: 00000= 00000000000 >>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>> 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:49= 50 >>>>>>>>>>>>>>>>>>>> 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 ffff88816e1= 72d80 >>>>>>>>>>>>>>>>>>>> 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, ffff88816e17= 3040) >>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>> The buggy address belongs to the physical page: >>>>>>>>>>>>>>>>>>>> page: refcount:0 mapcount:0 mapping:0000000000000000 i= ndex:0x0 pfn:0x16e170 >>>>>>>>>>>>>>>>>>>> head: order:2 mapcount:0 entire_mapcount:0 nr_pages_ma= pped:0 pincount:0 >>>>>>>>>>>>>>>>>>>> flags: 0x57ff00000000040(head|node=3D1|zone=3D2|lastcp= upid=3D0x7ff) >>>>>>>>>>>>>>>>>>>> page_type: f5(slab) >>>>>>>>>>>>>>>>>>>> raw: 057ff00000000040 ffff888160415140 dead00000000010= 0 dead000000000122 >>>>>>>>>>>>>>>>>>>> raw: 0000000000000000 0000000800120012 00000000f500000= 0 0000000000000000 >>>>>>>>>>>>>>>>>>>> head: 057ff00000000040 ffff888160415140 dead0000000001= 00 dead000000000122 >>>>>>>>>>>>>>>>>>>> head: 0000000000000000 0000000800120012 00000000f50000= 00 0000000000000000 >>>>>>>>>>>>>>>>>>>> head: 057ff00000000002 ffffffffffffff01 00000000ffffff= ff 00000000ffffffff >>>>>>>>>>>>>>>>>>>> head: ffffffffffffffff 0000000000000000 00000000ffffff= ff 0000000000000004 >>>>>>>>>>>>>>>>>>>> page dumped because: kasan: bad access detected >>>>>>>>>>>>>>>>>>>> page_owner tracks the page as allocated >>>>>>>>>>>>>>>>>>>> page last allocated via order 2, migratetype Unmovable= , gfp_mask 0xd2820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_N= OMEMALLOC), pid 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:49= 50 >>>>>>>>>>>>>>>>>>>> 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 [inlin= e] >>>>>>>>>>>>>>>>>>>> __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/quaranti= ne.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/lin= ux/kernel/git/netdev/net.git >>>>>>>>>>>>>>>>>>>> base: 18014147d3ee7831dce53fe65d7fc8d428b02552 >>>>>>>>>>>>>>>>>>>> arch: amd64 >>>>>>>>>>>>>>>>>>>> compiler: Debian clang version 21.1.8 (++202512210330= 36+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8 >>>>>>>>>>>>>>>>>>>> config: https://ci.syzbot.org/builds/90c5185d-0dad-= 4c34-a563-4253ebb12eb2/config >>>>>>>>>>>>>>>>>>>> syz repro: https://ci.syzbot.org/findings/53579ff8-147= 9-4e0c-ae08-2f1ea756ee1b/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+0= x54/0xd0 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 syz= kaller #0 PREEMPT(full) >>>>>>>>>>>>>>>>>>>> Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BI= OS 1.16.2-debian-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 [in= line] >>>>>>>>>>>>>>>>>>>> exit_to_user_mode_loop+0xf3/0x4d0 kernel/entry/common= .c:98 >>>>>>>>>>>>>>>>>>>> __exit_to_user_mode_prepare include/linux/irq-entry-c= ommon.h:207 [inline] >>>>>>>>>>>>>>>>>>>> syscall_exit_to_user_mode_prepare include/linux/irq-e= ntry-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 48 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: = 00000000000001b4 >>>>>>>>>>>>>>>>>>>> RAX: 0000000000000000 RBX: 00007fe50c217da0 RCX: 00007= fe50bf9ce59 >>>>>>>>>>>>>>>>>>>> RDX: 0000000000000000 RSI: 000000000000001e RDI: 00000= 00000000003 >>>>>>>>>>>>>>>>>>>> RBP: 00007fe50c217da0 R08: 00007fe50c216038 R09: 00000= 00000000000 >>>>>>>>>>>>>>>>>>>> R10: 000000000003fdd4 R11: 0000000000000246 R12: 00000= 00000010018 >>>>>>>>>>>>>>>>>>>> R13: 00007fe50c215fac R14: 00007fe50c215fa8 R15: 00007= fe50c215fa0 >>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>> 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:49= 50 >>>>>>>>>>>>>>>>>>>> __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 ffff8881673= 05380 >>>>>>>>>>>>>>>>>>>> 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, ffff88816730= 5470) >>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>> The buggy address belongs to the physical page: >>>>>>>>>>>>>>>>>>>> page: refcount:0 mapcount:0 mapping:0000000000000000 i= ndex:0x0 pfn:0x167304 >>>>>>>>>>>>>>>>>>>> head: order:1 mapcount:0 entire_mapcount:0 nr_pages_ma= pped:0 pincount:0 >>>>>>>>>>>>>>>>>>>> flags: 0x57ff00000000040(head|node=3D1|zone=3D2|lastcp= upid=3D0x7ff) >>>>>>>>>>>>>>>>>>>> page_type: f5(slab) >>>>>>>>>>>>>>>>>>>> raw: 057ff00000000040 ffff888160416dc0 dead00000000010= 0 dead000000000122 >>>>>>>>>>>>>>>>>>>> raw: 0000000000000000 0000000800150015 00000000f500000= 0 0000000000000000 >>>>>>>>>>>>>>>>>>>> head: 057ff00000000040 ffff888160416dc0 dead0000000001= 00 dead000000000122 >>>>>>>>>>>>>>>>>>>> head: 0000000000000000 0000000800150015 00000000f50000= 00 0000000000000000 >>>>>>>>>>>>>>>>>>>> head: 057ff00000000001 ffffffffffffff81 00000000ffffff= ff 00000000ffffffff >>>>>>>>>>>>>>>>>>>> head: ffffffffffffffff 0000000000000000 00000000ffffff= ff 0000000000000002 >>>>>>>>>>>>>>>>>>>> page dumped because: kasan: bad access detected >>>>>>>>>>>>>>>>>>>> page_owner tracks the page as allocated >>>>>>>>>>>>>>>>>>>> page last allocated via order 1, migratetype Unmovable= , gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|= __GFP_NOMEMALLOC), 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:49= 50 >>>>>>>>>>>>>>>>>>>> __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 [inlin= e] >>>>>>>>>>>>>>>>>>>> __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:1= 58 >>>>>>>>>>>>>>>>>>>> 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/lin= ux/kernel/git/netdev/net.git >>>>>>>>>>>>>>>>>>>> base: 18014147d3ee7831dce53fe65d7fc8d428b02552 >>>>>>>>>>>>>>>>>>>> arch: amd64 >>>>>>>>>>>>>>>>>>>> compiler: Debian clang version 21.1.8 (++202512210330= 36+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8 >>>>>>>>>>>>>>>>>>>> config: https://ci.syzbot.org/builds/90c5185d-0dad-= 4c34-a563-4253ebb12eb2/config >>>>>>>>>>>>>>>>>>>> syz repro: https://ci.syzbot.org/findings/c87569e1-d26= e-4670-a17b-9f2f64a5af67/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_r= ead_write include/linux/instrumented.h:112 [inline] >>>>>>>>>>>>>>>>>>>> BUG: KASAN: slab-use-after-free in atomic_fetch_sub_re= lease 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_te= st include/linux/refcount.h:450 [inline] >>>>>>>>>>>>>>>>>>>> BUG: KASAN: slab-use-after-free in skb_unref include/l= inux/skbuff.h:1292 [inline] >>>>>>>>>>>>>>>>>>>> BUG: KASAN: slab-use-after-free in __sk_skb_reason_dro= p net/core/skbuff.c:1212 [inline] >>>>>>>>>>>>>>>>>>>> BUG: KASAN: slab-use-after-free in sk_skb_reason_drop+= 0x37/0x110 net/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 syz= kaller #0 PREEMPT(full) >>>>>>>>>>>>>>>>>>>> Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BI= OS 1.16.2-debian-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/instrument= ed.h:112 [inline] >>>>>>>>>>>>>>>>>>>> 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 [i= nline] >>>>>>>>>>>>>>>>>>>> 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 [in= line] >>>>>>>>>>>>>>>>>>>> exit_to_user_mode_loop+0xf3/0x4d0 kernel/entry/common= .c:98 >>>>>>>>>>>>>>>>>>>> __exit_to_user_mode_prepare include/linux/irq-entry-c= ommon.h:207 [inline] >>>>>>>>>>>>>>>>>>>> syscall_exit_to_user_mode_prepare include/linux/irq-e= ntry-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 48 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: = 00000000000001b4 >>>>>>>>>>>>>>>>>>>> RAX: 0000000000000000 RBX: 00007fff722ecce0 RCX: 00007= fd4d139ce59 >>>>>>>>>>>>>>>>>>>> RDX: 0000000000000000 RSI: 000000000000001e RDI: 00000= 00000000003 >>>>>>>>>>>>>>>>>>>> RBP: 0000000000012825 R08: 0000000000000001 R09: 00000= 00000000000 >>>>>>>>>>>>>>>>>>>> R10: 0000001b32e20000 R11: 0000000000000246 R12: 00007= fff722ecd20 >>>>>>>>>>>>>>>>>>>> R13: 00007fd4d1615fac R14: 0000000000012859 R15: 00007= fd4d1615fa0 >>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>> 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/c= ommon.c:564 >>>>>>>>>>>>>>>>>>>> kasan_mempool_unpoison_object include/linux/kasan.h:3= 91 [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 ffff8881178= efe00 >>>>>>>>>>>>>>>>>>>> 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, ffff8881178e= fef0) >>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>> The buggy address belongs to the physical page: >>>>>>>>>>>>>>>>>>>> page: refcount:0 mapcount:0 mapping:0000000000000000 i= ndex:0x0 pfn:0x1178ee >>>>>>>>>>>>>>>>>>>> head: order:1 mapcount:0 entire_mapcount:0 nr_pages_ma= pped:0 pincount:0 >>>>>>>>>>>>>>>>>>>> flags: 0x17ff00000000040(head|node=3D0|zone=3D2|lastcp= upid=3D0x7ff) >>>>>>>>>>>>>>>>>>>> page_type: f5(slab) >>>>>>>>>>>>>>>>>>>> raw: 017ff00000000040 ffff888160416c80 dead00000000012= 2 0000000000000000 >>>>>>>>>>>>>>>>>>>> raw: 0000000000000000 0000000800150015 00000000f500000= 0 0000000000000000 >>>>>>>>>>>>>>>>>>>> head: 017ff00000000040 ffff888160416c80 dead0000000001= 22 0000000000000000 >>>>>>>>>>>>>>>>>>>> head: 0000000000000000 0000000800150015 00000000f50000= 00 0000000000000000 >>>>>>>>>>>>>>>>>>>> head: 017ff00000000001 ffffffffffffff81 00000000ffffff= ff 00000000ffffffff >>>>>>>>>>>>>>>>>>>> head: ffffffffffffffff 0000000000000000 00000000ffffff= ff 0000000000000002 >>>>>>>>>>>>>>>>>>>> page dumped because: kasan: bad access detected >>>>>>>>>>>>>>>>>>>> page_owner tracks the page as allocated >>>>>>>>>>>>>>>>>>>> page last allocated via order 1, migratetype Unmovable= , gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|= __GFP_NOMEMALLOC), pid 5050, tgid 5050 (klogd), ts 75887265953, free_ts 758= 76344896 >>>>>>>>>>>>>>>>>>>> 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:49= 50 >>>>>>>>>>>>>>>>>>>> __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:674= 3 >>>>>>>>>>>>>>>>>>>> sock_alloc_send_pskb+0x878/0x990 net/core/sock.c:2998 >>>>>>>>>>>>>>>>>>>> unix_dgram_sendmsg+0x460/0x18d0 net/unix/af_unix.c:21= 41 >>>>>>>>>>>>>>>>>>>> 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 [inlin= e] >>>>>>>>>>>>>>>>>>>> __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/api= c/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/in= clude/asm/idtentry.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 com= mit message: >>>>>>>>>>>>>>>>>>>> Tested-by: syzbot@syzkaller.appspotmail.com >>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>> --- >>>>>>>>>>>>>>>>>>>> This report is generated by a bot. It may contain erro= rs. >>>>>>>>>>>>>>>>>>>> syzbot ci engineers can be reached at syzkaller@google= groups.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 supported. >>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>> The email will later be sent to: >>>>>>>>>>>>>>>>>>>> [davem@davemloft.net edumazet@google.com horms@kernel.= org kees@kernel.org kuba@kernel.org kuniyu@google.com linux-kernel@vger.ker= nel.org netdev@vger.kernel.org pabeni@redhat.com stable@vger.kernel.org vul= ab@iscas.ac.cn 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 t= o the Google Groups "syzkaller-upstream-moderation" group. >>>>>>>>>>>>>>>>>>>> To unsubscribe from this group and stop receiving emai= ls from it, send an email to syzkaller-upstream-moderation+unsubscribe@goog= legroups.com. >>>>>>>>>>>>>>>>>>>> To view this discussion visit https://groups.google.co= m/d/msgid/syzkaller-upstream-moderation/6a185386.99a1ea37.128423.0001.GAE%4= 0google.com. >>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>> --=20 >>>>>>>>>>>>>>>>>> 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, send an email to syzkaller-upstream-moderation+unsubscribe@google= groups.com. >>>>>>>>>>>>>>>>>> To view this discussion visit https://groups.google.com/= d/msgid/syzkaller-upstream-moderation/6a18555e.e783d627.6395.0001.GAE%40goo= gle.com. >>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>> I see the command but can't find the corresponding bug. >>>>>>>>>>>>>>>>> The email is sent to syzbot+HASH@syzkaller.appspotmail.c= om 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.co= m 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. >>>>>>>>>>>>>> >>>>>>>>>>>>> >>>>>>>>>>>>> I see the command but can't find the corresponding bug. >>>>>>>>>>>>> The email is sent to syzbot+HASH@syzkaller.appspotmail.com a= ddress >>>>>>>>>>>>> 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 G= oogle Groups "syzkaller-upstream-moderation" group. >>>>>>>>>>>>> To unsubscribe from this group and stop receiving emails from= it, send an email to syzkaller-upstream-moderation+unsubscribe@googlegroup= s.com. >>>>>>>>>>>>> To view this discussion visit https://groups.google.com/d/msg= id/syzkaller-upstream-moderation/6a185563.99a1ea37.128423.0002.GAE%40google= .com. >>>>>>>>>>>> >>>>>>>>>>>> I see the command but can't find the corresponding bug. >>>>>>>>>>>> The email is sent to syzbot+HASH@syzkaller.appspotmail.com ad= dress >>>>>>>>>>>> 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 add= ress >>>>>>>>>>> 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 addr= ess >>>>>>>>>> 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 addre= ss >>>>>>>>> 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 addres= s >>>>>>>> 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. >>>>>> >>>>>> --=20 >>>>>> You received this message because you are subscribed to the Google G= roups "syzkaller-upstream-moderation" group. >>>>>> To unsubscribe from this group and stop receiving emails from it, se= nd an email to syzkaller-upstream-moderation+unsubscribe@googlegroups.com. >>>>>> To view this discussion visit https://groups.google.com/d/msgid/syzk= aller-upstream-moderation/6a185569.222db38e.c0a93.000d.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. >>> >> >> 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.