From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-qk1-f198.google.com (mail-qk1-f198.google.com [209.85.222.198]) (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 AB3B34C8FF4 for ; Thu, 28 May 2026 14:55:04 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.222.198 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779980105; cv=none; b=aHr7CQilo1Bj8HG9n10nRGegSweCDdAGekg39JBUGLoFgkdvzO4YDq7ju4u2wV1dH2dfFLiLe0b8t1q1CejZFiwcLSbRuBeM7KEXmXdIb2b7Mscqn9SmFHZv8eJ9fSyxg01+fZjqxEvrNVG6Wi9/AChJGaDLlx1UUjZ9aMOhvp4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779980105; c=relaxed/simple; bh=2o+i7WUguByM5mw6OCKI5/fXb3MC3rIPzEiB6tXIzCk=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To:Cc: Content-Type; b=gAPcOInvum4l7guB8eWlYyTQZ1JobGxWpNgHIN7mbCzGHxX+Wb7136+L+O0qQyneBa6rVxP7vE56JLeXt2el9yKabDdVIB813FcDZli99viNZf1i7SXCT7yKGOMEy1BqIBWUn1hSOJePAS0cIu8sHMxSgpyyxywe0zKuWAO1nqc= 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=209.85.222.198 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-qk1-f198.google.com with SMTP id af79cd13be357-914b4036b15so1115828385a.3 for ; Thu, 28 May 2026 07:55:04 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1779980099; x=1780584899; 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=FOj2t4bfQKaFaAvt9aJK4dK7ZFSDNmTx6FU3cYu8TqE=; b=gBk2P5Qzl0tcACXLrDKvX2OMYJPgbj8+ZucQh11BtUWBlMSeaSIZWITjukQcxvon14 uSES1asFEtl67GBuDHC6P4TSuXp3lD7BlPNQoQbAHlGsLJhvk0pCqE2NWQHwZtUjcJds b/Ix07dcFLxcfBZieWKa7oeOAKxy8GrwKnHj+VAmBicFhBzt91/FtIEiBVJ4TX0Vko3q dg5xPvR/HcBMz5AG7mK6XJbSAzMjZjK3MmT0iSrlyPupqWI9j06qBSzrAiwXl2kI6tKP fRboHTd0bHLSUz+8kYbuZnDmU6hZ7rzYmtMu97c0PJlnhA6yVw8YWHYautYL5gI/ABFh BLYg== X-Forwarded-Encrypted: i=1; AFNElJ8gk9LexB1h0HdPzBN0eTLcU71cfGOrevqfRdbPQj/G9M28s31iQA6IZTlDwOPOOxfehR5VkgA=@lists.linux.dev X-Gm-Message-State: AOJu0YzziIwDKCjB8HA/MeMwq0Vr1t+SZiQPONJKatouJv/2RNBsV0jo aWdk6KIe0EJ80norPGE2msRB+JfAtLuZwY743d5XetIbWbi5jeFyHE1jCSrPJzFmeSbndyPmBxR 2dsax9athKMziY2hIAtMh6MJm3Qf3eERb/ShjQoi5nxiYJKaTY7La3RL1dyU= Precedence: bulk X-Mailing-List: syzbot@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a4a:dec2:0:b0:69d:e41f:d71b with SMTP id 006d021491bc7-69de41fe2bdmr2773290eaf.49.1779979627868; Thu, 28 May 2026 07:47:07 -0700 (PDT) Date: Thu, 28 May 2026 07:47:07 -0700 In-Reply-To: <6a18556b.7f45b5d1.9d2a9.0020.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a18556b.b6d9d2ce.2aaec5.002f.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.c= om. >>>>>>>>>>> >>>>>>>>>>>> >>>>>>>>>>>> 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@is= cas.ac.cn >>>>>>>>>>>>> * [PATCH] netlink: fix skb refcount leak when dump start fail= s >>>>>>>>>>>>> >>>>>>>>>>>>> and found the following issues: >>>>>>>>>>>>> * KASAN: slab-use-after-free Read in nl80211_prepare_wdev_dum= p >>>>>>>>>>>>> * 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-cc639c2b= 4cfd >>>>>>>>>>>>> >>>>>>>>>>>>> *** >>>>>>>>>>>>> >>>>>>>>>>>>> KASAN: slab-use-after-free Read in nl80211_prepare_wdev_dump >>>>>>>>>>>>> >>>>>>>>>>>>> tree: net >>>>>>>>>>>>> URL: https://kernel.googlesource.com/pub/scm/linux/kern= el/git/netdev/net.git >>>>>>>>>>>>> base: 18014147d3ee7831dce53fe65d7fc8d428b02552 >>>>>>>>>>>>> arch: amd64 >>>>>>>>>>>>> compiler: Debian clang version 21.1.8 (++20251221033036+2078= da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8 >>>>>>>>>>>>> config: https://ci.syzbot.org/builds/90c5185d-0dad-4c34-a5= 63-4253ebb12eb2/config >>>>>>>>>>>>> syz repro: https://ci.syzbot.org/findings/0ad9835c-f631-4240-= 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 include/net/= netlink.h:784 [inline] >>>>>>>>>>>>> BUG: KASAN: slab-use-after-free in nlmsg_parse_deprecated inc= lude/net/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 PREEMPT(full) >>>>>>>>>>>>> Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 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 [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 c= e 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: 0000000= 00000002d >>>>>>>>>>>>> RAX: ffffffffffffffda RBX: 00007fd6424b76c0 RCX: 00007fd64155= d68e >>>>>>>>>>>>> RDX: 0000000000001000 RSI: 00007fd6424b6000 RDI: 000000000000= 0003 >>>>>>>>>>>>> RBP: 0000000000000000 R08: 0000000000000000 R09: 000000000000= 0000 >>>>>>>>>>>>> R10: 0000000000000000 R11: 0000000000000246 R12: 000000000000= 0003 >>>>>>>>>>>>> R13: 00007fd6424b5f58 R14: 00007fd6424b6000 R15: 000000000000= 0000 >>>>>>>>>>>>> >>>>>>>>>>>>> >>>>>>>>>>>>> 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:0x= 0 pfn:0x16e170 >>>>>>>>>>>>> head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 = pincount:0 >>>>>>>>>>>>> flags: 0x57ff00000000040(head|node=3D1|zone=3D2|lastcpupid=3D= 0x7ff) >>>>>>>>>>>>> page_type: f5(slab) >>>>>>>>>>>>> raw: 057ff00000000040 ffff888160415140 dead000000000100 dead0= 00000000122 >>>>>>>>>>>>> raw: 0000000000000000 0000000800120012 00000000f5000000 00000= 00000000000 >>>>>>>>>>>>> head: 057ff00000000040 ffff888160415140 dead000000000100 dead= 000000000122 >>>>>>>>>>>>> head: 0000000000000000 0000000800120012 00000000f5000000 0000= 000000000000 >>>>>>>>>>>>> head: 057ff00000000002 ffffffffffffff01 00000000ffffffff 0000= 0000ffffffff >>>>>>>>>>>>> head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000= 000000000004 >>>>>>>>>>>>> page dumped because: kasan: bad access detected >>>>>>>>>>>>> page_owner tracks the page as allocated >>>>>>>>>>>>> page last allocated via order 2, migratetype Unmovable, gfp_m= ask 0xd2820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALL= OC), 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: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:28= 6 >>>>>>>>>>>>> __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/kern= el/git/netdev/net.git >>>>>>>>>>>>> base: 18014147d3ee7831dce53fe65d7fc8d428b02552 >>>>>>>>>>>>> arch: amd64 >>>>>>>>>>>>> compiler: Debian clang version 21.1.8 (++20251221033036+2078= da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8 >>>>>>>>>>>>> config: https://ci.syzbot.org/builds/90c5185d-0dad-4c34-a5= 63-4253ebb12eb2/config >>>>>>>>>>>>> syz repro: https://ci.syzbot.org/findings/53579ff8-1479-4e0c-= 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+0x54/0xd= 0 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 PREEMPT(full) >>>>>>>>>>>>> Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 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 [i= nline] >>>>>>>>>>>>> __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-co= mmon.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 8= 9 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: 0000000= 0000001b4 >>>>>>>>>>>>> RAX: 0000000000000000 RBX: 00007fe50c217da0 RCX: 00007fe50bf9= ce59 >>>>>>>>>>>>> RDX: 0000000000000000 RSI: 000000000000001e RDI: 000000000000= 0003 >>>>>>>>>>>>> RBP: 00007fe50c217da0 R08: 00007fe50c216038 R09: 000000000000= 0000 >>>>>>>>>>>>> R10: 000000000003fdd4 R11: 0000000000000246 R12: 000000000001= 0018 >>>>>>>>>>>>> R13: 00007fe50c215fac R14: 00007fe50c215fa8 R15: 00007fe50c21= 5fa0 >>>>>>>>>>>>> >>>>>>>>>>>>> >>>>>>>>>>>>> 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:0x= 0 pfn:0x167304 >>>>>>>>>>>>> head: order:1 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 = pincount:0 >>>>>>>>>>>>> flags: 0x57ff00000000040(head|node=3D1|zone=3D2|lastcpupid=3D= 0x7ff) >>>>>>>>>>>>> page_type: f5(slab) >>>>>>>>>>>>> raw: 057ff00000000040 ffff888160416dc0 dead000000000100 dead0= 00000000122 >>>>>>>>>>>>> raw: 0000000000000000 0000000800150015 00000000f5000000 00000= 00000000000 >>>>>>>>>>>>> head: 057ff00000000040 ffff888160416dc0 dead000000000100 dead= 000000000122 >>>>>>>>>>>>> head: 0000000000000000 0000000800150015 00000000f5000000 0000= 000000000000 >>>>>>>>>>>>> head: 057ff00000000001 ffffffffffffff81 00000000ffffffff 0000= 0000ffffffff >>>>>>>>>>>>> head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000= 000000000002 >>>>>>>>>>>>> page dumped because: kasan: bad access detected >>>>>>>>>>>>> page_owner tracks the page as allocated >>>>>>>>>>>>> page last allocated via order 1, migratetype Unmovable, gfp_m= ask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_N= OMEMALLOC), pid 5813, tgid 5812 (syz.0.17), ts 64859679564, free_ts 6331261= 3640 >>>>>>>>>>>>> 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/kern= el/git/netdev/net.git >>>>>>>>>>>>> base: 18014147d3ee7831dce53fe65d7fc8d428b02552 >>>>>>>>>>>>> arch: amd64 >>>>>>>>>>>>> compiler: Debian clang version 21.1.8 (++20251221033036+2078= da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8 >>>>>>>>>>>>> config: https://ci.syzbot.org/builds/90c5185d-0dad-4c34-a5= 63-4253ebb12eb2/config >>>>>>>>>>>>> syz repro: https://ci.syzbot.org/findings/c87569e1-d26e-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_read_wri= te include/linux/instrumented.h:112 [inline] >>>>>>>>>>>>> BUG: KASAN: slab-use-after-free in atomic_fetch_sub_release i= nclude/linux/atomic/atomic-instrumented.h:400 [inline] >>>>>>>>>>>>> BUG: KASAN: slab-use-after-free in __refcount_sub_and_test in= clude/linux/refcount.h:389 [inline] >>>>>>>>>>>>> BUG: KASAN: slab-use-after-free in __refcount_dec_and_test in= clude/linux/refcount.h:432 [inline] >>>>>>>>>>>>> BUG: KASAN: slab-use-after-free in refcount_dec_and_test incl= ude/linux/refcount.h:450 [inline] >>>>>>>>>>>>> BUG: KASAN: slab-use-after-free in skb_unref include/linux/sk= buff.h:1292 [inline] >>>>>>>>>>>>> BUG: KASAN: slab-use-after-free in __sk_skb_reason_drop net/c= ore/skbuff.c:1212 [inline] >>>>>>>>>>>>> BUG: KASAN: slab-use-after-free in sk_skb_reason_drop+0x37/0x= 110 net/core/skbuff.c:1240 >>>>>>>>>>>>> Write of size 4 at addr ffff8881178efee4 by task syz.1.18/587= 3 >>>>>>>>>>>>> >>>>>>>>>>>>> CPU: 0 UID: 0 PID: 5873 Comm: syz.1.18 Not tainted syzkaller = #0 PREEMPT(full) >>>>>>>>>>>>> Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16= .2-debian-1.16.2-1 04/01/2014 >>>>>>>>>>>>> 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:11= 2 [inline] >>>>>>>>>>>>> atomic_fetch_sub_release include/linux/atomic/atomic-instrum= ented.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 [i= nline] >>>>>>>>>>>>> __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-co= mmon.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 8= 9 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: 0000000= 0000001b4 >>>>>>>>>>>>> RAX: 0000000000000000 RBX: 00007fff722ecce0 RCX: 00007fd4d139= ce59 >>>>>>>>>>>>> RDX: 0000000000000000 RSI: 000000000000001e RDI: 000000000000= 0003 >>>>>>>>>>>>> RBP: 0000000000012825 R08: 0000000000000001 R09: 000000000000= 0000 >>>>>>>>>>>>> R10: 0000001b32e20000 R11: 0000000000000246 R12: 00007fff722e= cd20 >>>>>>>>>>>>> R13: 00007fd4d1615fac R14: 0000000000012859 R15: 00007fd4d161= 5fa0 >>>>>>>>>>>>> >>>>>>>>>>>>> >>>>>>>>>>>>> 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 [inl= ine] >>>>>>>>>>>>> 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:0x= 0 pfn:0x1178ee >>>>>>>>>>>>> head: order:1 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 = pincount:0 >>>>>>>>>>>>> flags: 0x17ff00000000040(head|node=3D0|zone=3D2|lastcpupid=3D= 0x7ff) >>>>>>>>>>>>> page_type: f5(slab) >>>>>>>>>>>>> raw: 017ff00000000040 ffff888160416c80 dead000000000122 00000= 00000000000 >>>>>>>>>>>>> raw: 0000000000000000 0000000800150015 00000000f5000000 00000= 00000000000 >>>>>>>>>>>>> head: 017ff00000000040 ffff888160416c80 dead000000000122 0000= 000000000000 >>>>>>>>>>>>> head: 0000000000000000 0000000800150015 00000000f5000000 0000= 000000000000 >>>>>>>>>>>>> head: 017ff00000000001 ffffffffffffff81 00000000ffffffff 0000= 0000ffffffff >>>>>>>>>>>>> head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000= 000000000002 >>>>>>>>>>>>> page dumped because: kasan: bad access detected >>>>>>>>>>>>> page_owner tracks the page as allocated >>>>>>>>>>>>> page last allocated via order 1, migratetype Unmovable, gfp_m= ask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_N= OMEMALLOC), pid 5050, tgid 5050 (klogd), ts 75887265953, free_ts 7587634489= 6 >>>>>>>>>>>>> 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/a= pic.c:1061 >>>>>>>>>>>>> asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/a= sm/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 sub= mit a >>>>>>>>>>>>> separate fix, please add the following tag to your commit mes= sage: >>>>>>>>>>>>> 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 su= pported. >>>>>>>>>>>>> >>>>>>>>>>>>> The email will later be sent to: >>>>>>>>>>>>> [davem@davemloft.net edumazet@google.com horms@kernel.org kee= s@kernel.org kuba@kernel.org kuniyu@google.com linux-kernel@vger.kernel.org= netdev@vger.kernel.org pabeni@redhat.com stable@vger.kernel.org vulab@isca= s.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 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/6a185386.99a1ea37.128423.0001.GAE%40google= .com. >>>>>>>>>>> >>>>>>>>>>> --=20 >>>>>>>>>>> You received this message because you are subscribed to the Goo= gle Groups "syzkaller-upstream-moderation" group. >>>>>>>>>>> To unsubscribe from this group and stop receiving emails from i= t, send an email to syzkaller-upstream-moderation+unsubscribe@googlegroups.= com. >>>>>>>>>>> To view this discussion visit https://groups.google.com/d/msgid= /syzkaller-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 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. >>>>>> >>>>> >>>>> 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 Gro= ups "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/syzkal= ler-upstream-moderation/6a185565.7f45b5d1.9d2a9.0008.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. >>> >>> --=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/6a185566.e783d627.6395.0004.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. >> >> --=20 >> You received this message because you are subscribed to the Google Group= s "syzkaller-upstream-moderation" group. >> To unsubscribe from this group and stop receiving emails from it, send a= n email to syzkaller-upstream-moderation+unsubscribe@googlegroups.com. >> To view this discussion visit https://groups.google.com/d/msgid/syzkalle= r-upstream-moderation/6a185568.b6d9d2ce.2aaec5.000f.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.