From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pl1-f200.google.com (mail-pl1-f200.google.com [209.85.214.200]) (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 1C30D4C6EEB for ; Thu, 28 May 2026 14:55:00 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.200 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779980206; cv=none; b=ZpakrSz+bfUuHfMIuOhxunH8GltqShTExL0snJQTGXKHGNLI/71Xwp3Lru6ySE1eGIINK2q+B1rmFZbVhinEsLPF0+88ZJeoM4uVM1h8CahTGYfV+wLe6OldgIsz/kszRPPyfl2uKRbx76YsfjN3hO8QJ8fgBYXGDpD4OFb1hsw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779980206; c=relaxed/simple; bh=xYe3Xpnux9PUCSPqk2XMhLWCyyAHs85BYZnaa03j3Zc=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To:Cc: Content-Type; b=ZD0S7S35riz0cnRl7v41NBJNdsdZCtxZHPM24ISEhHP6fYMeTANXIeUPKJ+FjSwnAHUZ0V3aHOyzQmCthqiRrjCs1biA4ZIk+48U+MZWXff6+Mh+WkNmy92gN0paRgbIzHFAvk7abSfROnlzeypF3FW7gsY5Q3c+ioHtzpbmH/Q= 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=209.85.214.200 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-pl1-f200.google.com with SMTP id d9443c01a7336-2b4530a90fdso84394985ad.1 for ; Thu, 28 May 2026 07:55:00 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1779980077; x=1780584877; 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=7zEi/YEotGDo2qNPZFVlbr+sAiIa9lVSFiGcP57Lb4Q=; b=i8x6DcBrY/d8fCTJPhljA7IhhR1JCqp6KE7piNCu24XmhJ7RTFXo3TDg6fBDL/Te4U sH56VmQmKd5pA4Yz3ONF7HzokqhlYT/xdwZlepK8K7QlBI8IwyILOPcNvM4UIuBMyw32 wEkIjywnVkq3CJFIXeTQC6OO9Jw01J1z3en5iWT9X5tGLmFkzi2D29yLOd/S+JUkQCX9 b8TzvU4aKerDrIwiX+S9YpdeCcV9idN0Q/g0T9jyIuJNC7vweiDIPVt8p0m2XRGFXvF9 K/IALI8IK6L9NpuDvq0pIhwKWmSadSrD08bo2H9fEpQhqs+mkHHYja3eeXM/wRXD2lOZ 0wOg== X-Forwarded-Encrypted: i=1; AFNElJ8tQfiqJrQ8T99UPh5fv+KBxmm3paj6H1whwVWizaf3ev7bQfNHxh+SoVh/MNqvapvb2hD6wH8=@lists.linux.dev X-Gm-Message-State: AOJu0YzjHWPWO97ztpJlw38xlRYGTkt2I7r83dNsyMuyPKnVR3xu+xyJ jf97P9dV/0XFeJLJoHKBa0+iLham8w6BQYqSXDXkZ5mYiwAO5RpRDoLU7YFPEu2YC1PE9Rt/G29 LFi10BJr97Fz0wdtNBcBlfW6wprwDLQ/koFfUL/W7WmgiR6fkOcisvXr64Rg= Precedence: bulk X-Mailing-List: syzbot@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:4c07:b0:69d:521d:a4eb with SMTP id 006d021491bc7-69d7ead4fbbmr15107681eaf.5.1779979639126; Thu, 28 May 2026 07:47:19 -0700 (PDT) Date: Thu, 28 May 2026 07:47:19 -0700 In-Reply-To: <6a185576.222db38e.c0a93.0239.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a185577.b6d9d2ce.2aaec5.027f.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@goog= legroups.com. >>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>> On Thu, May 28, 2026 at 4:39=E2=80=AFPM syzbot ci >>>>>>>>>>>>>>>>>>>>>> wrote: >>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>> syzbot ci has tested the following series >>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>> [v1] netlink: fix skb refcount leak when dump start= fails >>>>>>>>>>>>>>>>>>>>>>> https://lore.kernel.org/all/20260528073614.1169858-= 1-vulab@iscas.ac.cn >>>>>>>>>>>>>>>>>>>>>>> * [PATCH] netlink: fix skb refcount leak when dump = start fails >>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>> and found the following issues: >>>>>>>>>>>>>>>>>>>>>>> * KASAN: slab-use-after-free Read in nl80211_prepar= e_wdev_dump >>>>>>>>>>>>>>>>>>>>>>> * KASAN: slab-use-after-free Read in xfrm_dump_sa_d= one >>>>>>>>>>>>>>>>>>>>>>> * KASAN: slab-use-after-free Write in sk_skb_reason= _drop >>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>> Full report is available here: >>>>>>>>>>>>>>>>>>>>>>> https://ci.syzbot.org/series/8ed6f41d-0d02-4f1f-a7b= e-cc639c2b4cfd >>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>> *** >>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>> KASAN: slab-use-after-free Read in nl80211_prepare_= wdev_dump >>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>> tree: net >>>>>>>>>>>>>>>>>>>>>>> URL: https://kernel.googlesource.com/pub/scm/= linux/kernel/git/netdev/net.git >>>>>>>>>>>>>>>>>>>>>>> base: 18014147d3ee7831dce53fe65d7fc8d428b02552 >>>>>>>>>>>>>>>>>>>>>>> arch: amd64 >>>>>>>>>>>>>>>>>>>>>>> compiler: Debian clang version 21.1.8 (++202512210= 33036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8 >>>>>>>>>>>>>>>>>>>>>>> config: https://ci.syzbot.org/builds/90c5185d-0d= ad-4c34-a563-4253ebb12eb2/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 in= clude/net/netlink.h:784 [inline] >>>>>>>>>>>>>>>>>>>>>>> BUG: KASAN: slab-use-after-free in nlmsg_parse_depr= ecated include/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/repo= rt.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/nl80= 211.c:8216 >>>>>>>>>>>>>>>>>>>>>>> genl_dumpit+0x10b/0x1b0 net/netlink/genetlink.c:10= 26 >>>>>>>>>>>>>>>>>>>>>>> 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 [inl= ine] >>>>>>>>>>>>>>>>>>>>>>> do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_6= 4.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_RA= X: 000000000000002d >>>>>>>>>>>>>>>>>>>>>>> RAX: ffffffffffffffda RBX: 00007fd6424b76c0 RCX: 00= 007fd64155d68e >>>>>>>>>>>>>>>>>>>>>>> RDX: 0000000000001000 RSI: 00007fd6424b6000 RDI: 00= 00000000000003 >>>>>>>>>>>>>>>>>>>>>>> RBP: 0000000000000000 R08: 0000000000000000 R09: 00= 00000000000000 >>>>>>>>>>>>>>>>>>>>>>> R10: 0000000000000000 R11: 0000000000000246 R12: 00= 00000000000003 >>>>>>>>>>>>>>>>>>>>>>> R13: 00007fd6424b5f58 R14: 00007fd6424b6000 R15: 00= 00000000000000 >>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>> 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 [inl= ine] >>>>>>>>>>>>>>>>>>>>>>> do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_6= 4.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:111= 4 >>>>>>>>>>>>>>>>>>>>>>> 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:13= 19 [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 [inl= ine] >>>>>>>>>>>>>>>>>>>>>>> do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_6= 4.c:94 >>>>>>>>>>>>>>>>>>>>>>> entry_SYSCALL_64_after_hwframe+0x77/0x7f >>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>> The buggy address belongs to the object at ffff8881= 6e172d80 >>>>>>>>>>>>>>>>>>>>>>> which belongs to the cache skbuff_small_head of si= ze 704 >>>>>>>>>>>>>>>>>>>>>>> The buggy address is located 0 bytes inside of >>>>>>>>>>>>>>>>>>>>>>> freed 704-byte region [ffff88816e172d80, ffff88816= e173040) >>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>> The buggy address belongs to the physical page: >>>>>>>>>>>>>>>>>>>>>>> page: refcount:0 mapcount:0 mapping:000000000000000= 0 index:0x0 pfn:0x16e170 >>>>>>>>>>>>>>>>>>>>>>> head: order:2 mapcount:0 entire_mapcount:0 nr_pages= _mapped:0 pincount:0 >>>>>>>>>>>>>>>>>>>>>>> flags: 0x57ff00000000040(head|node=3D1|zone=3D2|las= tcpupid=3D0x7ff) >>>>>>>>>>>>>>>>>>>>>>> page_type: f5(slab) >>>>>>>>>>>>>>>>>>>>>>> raw: 057ff00000000040 ffff888160415140 dead00000000= 0100 dead000000000122 >>>>>>>>>>>>>>>>>>>>>>> raw: 0000000000000000 0000000800120012 00000000f500= 0000 0000000000000000 >>>>>>>>>>>>>>>>>>>>>>> head: 057ff00000000040 ffff888160415140 dead0000000= 00100 dead000000000122 >>>>>>>>>>>>>>>>>>>>>>> head: 0000000000000000 0000000800120012 00000000f50= 00000 0000000000000000 >>>>>>>>>>>>>>>>>>>>>>> head: 057ff00000000002 ffffffffffffff01 00000000fff= fffff 00000000ffffffff >>>>>>>>>>>>>>>>>>>>>>> head: ffffffffffffffff 0000000000000000 00000000fff= fffff 0000000000000004 >>>>>>>>>>>>>>>>>>>>>>> page dumped because: kasan: bad access detected >>>>>>>>>>>>>>>>>>>>>>> page_owner tracks the page as allocated >>>>>>>>>>>>>>>>>>>>>>> page last allocated via order 2, migratetype Unmova= ble, gfp_mask 0xd2820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GF= P_NOMEMALLOC), pid 5530, tgid 5530 (sshd), ts 47735478218, free_ts 34702748= 767 >>>>>>>>>>>>>>>>>>>>>>> set_page_owner include/linux/page_owner.h:32 [inli= ne] >>>>>>>>>>>>>>>>>>>>>>> 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_al= loc.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:465= 1 >>>>>>>>>>>>>>>>>>>>>>> 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:44= 73 >>>>>>>>>>>>>>>>>>>>>>> tcp_cleanup_rbuf net/ipv4/tcp.c:1612 [inline] >>>>>>>>>>>>>>>>>>>>>>> tcp_recvmsg_locked+0x2dfa/0x3720 net/ipv4/tcp.c:29= 16 >>>>>>>>>>>>>>>>>>>>>>> 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 [inl= ine] >>>>>>>>>>>>>>>>>>>>>>> do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_6= 4.c:94 >>>>>>>>>>>>>>>>>>>>>>> page last free pid 5059 tgid 5059 stack trace: >>>>>>>>>>>>>>>>>>>>>>> reset_page_owner include/linux/page_owner.h:25 [in= line] >>>>>>>>>>>>>>>>>>>>>>> __free_pages_prepare mm/page_alloc.c:1402 [inline] >>>>>>>>>>>>>>>>>>>>>>> __free_frozen_pages+0xbc7/0xd30 mm/page_alloc.c:29= 43 >>>>>>>>>>>>>>>>>>>>>>> __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:17= 9 >>>>>>>>>>>>>>>>>>>>>>> kasan_quarantine_reduce+0x148/0x160 mm/kasan/quara= ntine.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 [inl= ine] >>>>>>>>>>>>>>>>>>>>>>> do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_6= 4.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_don= e >>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>> tree: net >>>>>>>>>>>>>>>>>>>>>>> URL: https://kernel.googlesource.com/pub/scm/= linux/kernel/git/netdev/net.git >>>>>>>>>>>>>>>>>>>>>>> base: 18014147d3ee7831dce53fe65d7fc8d428b02552 >>>>>>>>>>>>>>>>>>>>>>> arch: amd64 >>>>>>>>>>>>>>>>>>>>>>> compiler: Debian clang version 21.1.8 (++202512210= 33036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8 >>>>>>>>>>>>>>>>>>>>>>> config: https://ci.syzbot.org/builds/90c5185d-0d= ad-4c34-a563-4253ebb12eb2/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_don= e+0x54/0xd0 net/xfrm/xfrm_user.c:1491 >>>>>>>>>>>>>>>>>>>>>>> Read of size 8 at addr ffff888167305398 by task syz= .0.17/5812 >>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>> CPU: 1 UID: 0 PID: 5812 Comm: syz.0.17 Not tainted = syzkaller #0 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/repo= rt.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:1= 491 >>>>>>>>>>>>>>>>>>>>>>> netlink_release+0x12c8/0x1ad0 net/netlink/af_netli= nk.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_mo= de.h:50 [inline] >>>>>>>>>>>>>>>>>>>>>>> __exit_to_user_mode_loop kernel/entry/common.c:67 = [inline] >>>>>>>>>>>>>>>>>>>>>>> exit_to_user_mode_loop+0xf3/0x4d0 kernel/entry/com= mon.c:98 >>>>>>>>>>>>>>>>>>>>>>> __exit_to_user_mode_prepare include/linux/irq-entr= y-common.h:207 [inline] >>>>>>>>>>>>>>>>>>>>>>> syscall_exit_to_user_mode_prepare include/linux/ir= q-entry-common.h:230 [inline] >>>>>>>>>>>>>>>>>>>>>>> syscall_exit_to_user_mode include/linux/entry-comm= on.h:318 [inline] >>>>>>>>>>>>>>>>>>>>>>> do_syscall_64+0x33e/0xf80 arch/x86/entry/syscall_6= 4.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_RA= X: 00000000000001b4 >>>>>>>>>>>>>>>>>>>>>>> RAX: 0000000000000000 RBX: 00007fe50c217da0 RCX: 00= 007fe50bf9ce59 >>>>>>>>>>>>>>>>>>>>>>> RDX: 0000000000000000 RSI: 000000000000001e RDI: 00= 00000000000003 >>>>>>>>>>>>>>>>>>>>>>> RBP: 00007fe50c217da0 R08: 00007fe50c216038 R09: 00= 00000000000000 >>>>>>>>>>>>>>>>>>>>>>> R10: 000000000003fdd4 R11: 0000000000000246 R12: 00= 00000000010018 >>>>>>>>>>>>>>>>>>>>>>> R13: 00007fe50c215fac R14: 00007fe50c215fa8 R15: 00= 007fe50c215fa0 >>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>> 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 [inl= ine] >>>>>>>>>>>>>>>>>>>>>>> do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_6= 4.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:13= 19 [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 [inl= ine] >>>>>>>>>>>>>>>>>>>>>>> do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_6= 4.c:94 >>>>>>>>>>>>>>>>>>>>>>> entry_SYSCALL_64_after_hwframe+0x77/0x7f >>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>> The buggy address belongs to the object at ffff8881= 67305380 >>>>>>>>>>>>>>>>>>>>>>> which belongs to the cache skbuff_head_cache of si= ze 240 >>>>>>>>>>>>>>>>>>>>>>> The buggy address is located 24 bytes inside of >>>>>>>>>>>>>>>>>>>>>>> freed 240-byte region [ffff888167305380, ffff88816= 7305470) >>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>> The buggy address belongs to the physical page: >>>>>>>>>>>>>>>>>>>>>>> page: refcount:0 mapcount:0 mapping:000000000000000= 0 index:0x0 pfn:0x167304 >>>>>>>>>>>>>>>>>>>>>>> head: order:1 mapcount:0 entire_mapcount:0 nr_pages= _mapped:0 pincount:0 >>>>>>>>>>>>>>>>>>>>>>> flags: 0x57ff00000000040(head|node=3D1|zone=3D2|las= tcpupid=3D0x7ff) >>>>>>>>>>>>>>>>>>>>>>> page_type: f5(slab) >>>>>>>>>>>>>>>>>>>>>>> raw: 057ff00000000040 ffff888160416dc0 dead00000000= 0100 dead000000000122 >>>>>>>>>>>>>>>>>>>>>>> raw: 0000000000000000 0000000800150015 00000000f500= 0000 0000000000000000 >>>>>>>>>>>>>>>>>>>>>>> head: 057ff00000000040 ffff888160416dc0 dead0000000= 00100 dead000000000122 >>>>>>>>>>>>>>>>>>>>>>> head: 0000000000000000 0000000800150015 00000000f50= 00000 0000000000000000 >>>>>>>>>>>>>>>>>>>>>>> head: 057ff00000000001 ffffffffffffff81 00000000fff= fffff 00000000ffffffff >>>>>>>>>>>>>>>>>>>>>>> head: ffffffffffffffff 0000000000000000 00000000fff= fffff 0000000000000002 >>>>>>>>>>>>>>>>>>>>>>> page dumped because: kasan: bad access detected >>>>>>>>>>>>>>>>>>>>>>> page_owner tracks the page as allocated >>>>>>>>>>>>>>>>>>>>>>> page last allocated via order 1, migratetype Unmova= ble, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_CO= MP|__GFP_NOMEMALLOC), pid 5813, tgid 5812 (syz.0.17), ts 64859679564, free_= ts 63312613640 >>>>>>>>>>>>>>>>>>>>>>> set_page_owner include/linux/page_owner.h:32 [inli= ne] >>>>>>>>>>>>>>>>>>>>>>> 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_al= loc.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:465= 1 >>>>>>>>>>>>>>>>>>>>>>> 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 [inl= ine] >>>>>>>>>>>>>>>>>>>>>>> do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_6= 4.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 [in= line] >>>>>>>>>>>>>>>>>>>>>>> __free_pages_prepare mm/page_alloc.c:1402 [inline] >>>>>>>>>>>>>>>>>>>>>>> __free_frozen_pages+0xbc7/0xd30 mm/page_alloc.c:29= 43 >>>>>>>>>>>>>>>>>>>>>>> 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_6= 4.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_d= rop >>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>> tree: net >>>>>>>>>>>>>>>>>>>>>>> URL: https://kernel.googlesource.com/pub/scm/= linux/kernel/git/netdev/net.git >>>>>>>>>>>>>>>>>>>>>>> base: 18014147d3ee7831dce53fe65d7fc8d428b02552 >>>>>>>>>>>>>>>>>>>>>>> arch: amd64 >>>>>>>>>>>>>>>>>>>>>>> compiler: Debian clang version 21.1.8 (++202512210= 33036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8 >>>>>>>>>>>>>>>>>>>>>>> config: https://ci.syzbot.org/builds/90c5185d-0d= ad-4c34-a563-4253ebb12eb2/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_atomi= c_read_write include/linux/instrumented.h:112 [inline] >>>>>>>>>>>>>>>>>>>>>>> BUG: KASAN: slab-use-after-free in atomic_fetch_sub= _release include/linux/atomic/atomic-instrumented.h:400 [inline] >>>>>>>>>>>>>>>>>>>>>>> BUG: KASAN: slab-use-after-free in __refcount_sub_a= nd_test include/linux/refcount.h:389 [inline] >>>>>>>>>>>>>>>>>>>>>>> BUG: KASAN: slab-use-after-free in __refcount_dec_a= nd_test include/linux/refcount.h:432 [inline] >>>>>>>>>>>>>>>>>>>>>>> BUG: KASAN: slab-use-after-free in refcount_dec_and= _test include/linux/refcount.h:450 [inline] >>>>>>>>>>>>>>>>>>>>>>> BUG: KASAN: slab-use-after-free in skb_unref includ= e/linux/skbuff.h:1292 [inline] >>>>>>>>>>>>>>>>>>>>>>> BUG: KASAN: slab-use-after-free in __sk_skb_reason_= drop net/core/skbuff.c:1212 [inline] >>>>>>>>>>>>>>>>>>>>>>> BUG: KASAN: slab-use-after-free in sk_skb_reason_dr= op+0x37/0x110 net/core/skbuff.c:1240 >>>>>>>>>>>>>>>>>>>>>>> Write of size 4 at addr ffff8881178efee4 by task sy= z.1.18/5873 >>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>> 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/repo= rt.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:2= 00 >>>>>>>>>>>>>>>>>>>>>>> instrument_atomic_read_write include/linux/instrum= ented.h:112 [inline] >>>>>>>>>>>>>>>>>>>>>>> atomic_fetch_sub_release include/linux/atomic/atom= ic-instrumented.h:400 [inline] >>>>>>>>>>>>>>>>>>>>>>> __refcount_sub_and_test include/linux/refcount.h:3= 89 [inline] >>>>>>>>>>>>>>>>>>>>>>> __refcount_dec_and_test include/linux/refcount.h:4= 32 [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 [inlin= e] >>>>>>>>>>>>>>>>>>>>>>> sk_skb_reason_drop+0x37/0x110 net/core/skbuff.c:12= 40 >>>>>>>>>>>>>>>>>>>>>>> kfree_skb_reason include/linux/skbuff.h:1322 [inli= ne] >>>>>>>>>>>>>>>>>>>>>>> kfree_skb include/linux/skbuff.h:1331 [inline] >>>>>>>>>>>>>>>>>>>>>>> netlink_release+0x133a/0x1ad0 net/netlink/af_netli= nk.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_mo= de.h:50 [inline] >>>>>>>>>>>>>>>>>>>>>>> __exit_to_user_mode_loop kernel/entry/common.c:67 = [inline] >>>>>>>>>>>>>>>>>>>>>>> exit_to_user_mode_loop+0xf3/0x4d0 kernel/entry/com= mon.c:98 >>>>>>>>>>>>>>>>>>>>>>> __exit_to_user_mode_prepare include/linux/irq-entr= y-common.h:207 [inline] >>>>>>>>>>>>>>>>>>>>>>> syscall_exit_to_user_mode_prepare include/linux/ir= q-entry-common.h:230 [inline] >>>>>>>>>>>>>>>>>>>>>>> syscall_exit_to_user_mode include/linux/entry-comm= on.h:318 [inline] >>>>>>>>>>>>>>>>>>>>>>> do_syscall_64+0x33e/0xf80 arch/x86/entry/syscall_6= 4.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_RA= X: 00000000000001b4 >>>>>>>>>>>>>>>>>>>>>>> RAX: 0000000000000000 RBX: 00007fff722ecce0 RCX: 00= 007fd4d139ce59 >>>>>>>>>>>>>>>>>>>>>>> RDX: 0000000000000000 RSI: 000000000000001e RDI: 00= 00000000000003 >>>>>>>>>>>>>>>>>>>>>>> RBP: 0000000000012825 R08: 0000000000000001 R09: 00= 00000000000000 >>>>>>>>>>>>>>>>>>>>>>> R10: 0000001b32e20000 R11: 0000000000000246 R12: 00= 007fff722ecd20 >>>>>>>>>>>>>>>>>>>>>>> R13: 00007fd4d1615fac R14: 0000000000012859 R15: 00= 007fd4d1615fa0 >>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>> 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/kasa= n/common.c:564 >>>>>>>>>>>>>>>>>>>>>>> kasan_mempool_unpoison_object include/linux/kasan.= h:391 [inline] >>>>>>>>>>>>>>>>>>>>>>> napi_skb_cache_get+0x3c8/0x780 net/core/skbuff.c:3= 06 >>>>>>>>>>>>>>>>>>>>>>> __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 [inl= ine] >>>>>>>>>>>>>>>>>>>>>>> do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_6= 4.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:13= 19 [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 [inl= ine] >>>>>>>>>>>>>>>>>>>>>>> do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_6= 4.c:94 >>>>>>>>>>>>>>>>>>>>>>> entry_SYSCALL_64_after_hwframe+0x77/0x7f >>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>> The buggy address belongs to the object at ffff8881= 178efe00 >>>>>>>>>>>>>>>>>>>>>>> which belongs to the cache skbuff_head_cache of si= ze 240 >>>>>>>>>>>>>>>>>>>>>>> The buggy address is located 228 bytes inside of >>>>>>>>>>>>>>>>>>>>>>> freed 240-byte region [ffff8881178efe00, ffff88811= 78efef0) >>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>> The buggy address belongs to the physical page: >>>>>>>>>>>>>>>>>>>>>>> page: refcount:0 mapcount:0 mapping:000000000000000= 0 index:0x0 pfn:0x1178ee >>>>>>>>>>>>>>>>>>>>>>> head: order:1 mapcount:0 entire_mapcount:0 nr_pages= _mapped:0 pincount:0 >>>>>>>>>>>>>>>>>>>>>>> flags: 0x17ff00000000040(head|node=3D0|zone=3D2|las= tcpupid=3D0x7ff) >>>>>>>>>>>>>>>>>>>>>>> page_type: f5(slab) >>>>>>>>>>>>>>>>>>>>>>> raw: 017ff00000000040 ffff888160416c80 dead00000000= 0122 0000000000000000 >>>>>>>>>>>>>>>>>>>>>>> raw: 0000000000000000 0000000800150015 00000000f500= 0000 0000000000000000 >>>>>>>>>>>>>>>>>>>>>>> head: 017ff00000000040 ffff888160416c80 dead0000000= 00122 0000000000000000 >>>>>>>>>>>>>>>>>>>>>>> head: 0000000000000000 0000000800150015 00000000f50= 00000 0000000000000000 >>>>>>>>>>>>>>>>>>>>>>> head: 017ff00000000001 ffffffffffffff81 00000000fff= fffff 00000000ffffffff >>>>>>>>>>>>>>>>>>>>>>> head: ffffffffffffffff 0000000000000000 00000000fff= fffff 0000000000000002 >>>>>>>>>>>>>>>>>>>>>>> page dumped because: kasan: bad access detected >>>>>>>>>>>>>>>>>>>>>>> page_owner tracks the page as allocated >>>>>>>>>>>>>>>>>>>>>>> page last allocated via order 1, migratetype Unmova= ble, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_CO= MP|__GFP_NOMEMALLOC), pid 5050, tgid 5050 (klogd), ts 75887265953, free_ts = 75876344896 >>>>>>>>>>>>>>>>>>>>>>> set_page_owner include/linux/page_owner.h:32 [inli= ne] >>>>>>>>>>>>>>>>>>>>>>> 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_al= loc.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:465= 1 >>>>>>>>>>>>>>>>>>>>>>> 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:2= 998 >>>>>>>>>>>>>>>>>>>>>>> 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 [inl= ine] >>>>>>>>>>>>>>>>>>>>>>> do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_6= 4.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 [in= line] >>>>>>>>>>>>>>>>>>>>>>> __free_pages_prepare mm/page_alloc.c:1402 [inline] >>>>>>>>>>>>>>>>>>>>>>> __free_frozen_pages+0xbc7/0xd30 mm/page_alloc.c:29= 43 >>>>>>>>>>>>>>>>>>>>>>> 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/ker= nel/apic/apic.c:1061 >>>>>>>>>>>>>>>>>>>>>>> asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86= /include/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 ser= ies or submit a >>>>>>>>>>>>>>>>>>>>>>> separate fix, please add the following tag to your = commit message: >>>>>>>>>>>>>>>>>>>>>>> Tested-by: syzbot@syzkaller.appspotmail.com >>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>> --- >>>>>>>>>>>>>>>>>>>>>>> This report is generated by a bot. It may contain e= rrors. >>>>>>>>>>>>>>>>>>>>>>> syzbot ci engineers can be reached at syzkaller@goo= glegroups.com. >>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>> To test a patch for this bug, please reply with `#s= yz 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@kern= el.org kees@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@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 subscribe= d to the Google Groups "syzkaller-upstream-moderation" group. >>>>>>>>>>>>>>>>>>>>>>> To unsubscribe from this group and stop receiving e= mails from it, send an email to syzkaller-upstream-moderation+unsubscribe@g= ooglegroups.com. >>>>>>>>>>>>>>>>>>>>>>> To view this discussion visit https://groups.google= .com/d/msgid/syzkaller-upstream-moderation/6a185386.99a1ea37.128423.0001.GA= E%40google.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 ema= ils from it, send an email to syzkaller-upstream-moderation+unsubscribe@goo= glegroups.com. >>>>>>>>>>>>>>>>>>>>> To view this discussion visit https://groups.google.c= om/d/msgid/syzkaller-upstream-moderation/6a18555e.e783d627.6395.0001.GAE%40= google.com. >>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>> I see the command but can't find the corresponding bug= . >>>>>>>>>>>>>>>>>>>> The email is sent to syzbot+HASH@syzkaller.appspotmai= l.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 Groups "syzkaller-upstream-moderation" group. >>>>>>>>>>>>>>>>>>> To unsubscribe from this group and stop receiving email= s from it, send an email to syzkaller-upstream-moderation+unsubscribe@googl= egroups.com. >>>>>>>>>>>>>>>>>>> To view this discussion visit https://groups.google.com= /d/msgid/syzkaller-upstream-moderation/6a185561.7f45b5d1.9d2a9.0005.GAE%40g= oogle.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.c= om 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 t= he 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@googleg= roups.com. >>>>>>>>>>>>>>>>> To view this discussion visit https://groups.google.com/d= /msgid/syzkaller-upstream-moderation/6a185564.7f45b5d1.9d2a9.0007.GAE%40goo= gle.com. >>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>> 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. >>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>> --=20 >>>>>>>>>>>>>>>> You received this message because you are subscribed to th= e Google Groups "syzkaller-upstream-moderation" group. >>>>>>>>>>>>>>>> To unsubscribe from this group and stop receiving emails f= rom it, send an email to syzkaller-upstream-moderation+unsubscribe@googlegr= oups.com. >>>>>>>>>>>>>>>> To view this discussion visit https://groups.google.com/d/= msgid/syzkaller-upstream-moderation/6a185566.586c836d.2e3ab2.0005.GAE%40goo= gle.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 Groups "syzkaller-upstream-moderation" group. >>>>>>>>>>>>>>> To unsubscribe from this group and stop receiving emails fr= om it, send an email to syzkaller-upstream-moderation+unsubscribe@googlegro= ups.com. >>>>>>>>>>>>>>> To view this discussion visit https://groups.google.com/d/m= sgid/syzkaller-upstream-moderation/6a185569.222db38e.c0a93.000b.GAE%40googl= e.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 Groups "syzkaller-upstream-moderation" group. >>>>>>>>>>>>>> To unsubscribe from this group and stop receiving emails fro= m it, send an email to syzkaller-upstream-moderation+unsubscribe@googlegrou= ps.com. >>>>>>>>>>>>>> To view this discussion visit https://groups.google.com/d/ms= gid/syzkaller-upstream-moderation/6a18556b.99a1ea37.128423.0015.GAE%40googl= e.com. >>>>>>>>>>>>> >>>>>>>>>>>>> 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. >>>>>>>>>>>>> >>>>>>>>>>>> >>>>>>>>>>>> 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. >>>>>> >>>>> >>>>> 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.