From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-io1-f70.google.com (mail-io1-f70.google.com [209.85.166.70]) (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 A67CB39E for ; Thu, 18 Jan 2024 00:18:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.70 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1705537087; cv=none; b=OKcyGboAyDMWwMUShqeWRzRfE5WKj5YWUSsVoWoEByuF6FSdouUAfl623tEB86w1sPxvC3wcMJhhH9F3xNHYhXkVhpAFz0C6oy8GpowunFTQjXOmSPkUqsdA+TyXdnfEojeXYADa6BOaAm/JsGCEwL+mHYX/co4sFpoxN0alvws= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1705537087; c=relaxed/simple; bh=WSj9P0II9z+6oBLAwD+ZhIcalYR8w6In1pVUOnyQiSM=; h=Received:X-Google-DKIM-Signature:X-Gm-Message-State: X-Google-Smtp-Source:MIME-Version:X-Received:Date:In-Reply-To: X-Google-Appengine-App-Id:X-Google-Appengine-App-Id-Alias: Message-ID:Subject:From:To:Content-Type; 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bh=3qLmTRPvsMPfNyZ9iUdzWoocKWGYJHp0vSIZjtVLank=; b=BewWjbE2ghp8L1dYq0cQXZvKDcTqw5A+enrBlt2k7gpeerOeeWbeiabGLW9F4IpsaE Pq3cUrIwCY8bw8eI4pc2iKFaR9WRWi3jSxOqWlvXvIcom9QIXMXh5A8W8dKwmbhKJRw/ SX4yoCIhZ16NcqXglLN/1m7DPocJW891K8A/69kLPCaaujHDa0Df6YuIBLJxzfh+5i/V BkVKBVVDJ4IeSBsr/ESQs4c62741XRIpjeTCnhoP+62h0G0+46ch0QXTp6cPXJjGtGMm zb2N+B1YLF6rG6dFMHh+9DHpSCpcDzUPbpuTuQXYSnjc4mAQvpe8acO9I83l6lvwDPy+ G+yQ== X-Gm-Message-State: AOJu0YyIvRkNMePY+twE1TfwjfMDYMLNp5BpcNn44YdqDd4+UtW8uvB2 Y/vLcwEi0Lujaw1XGnidYH8TEqDLa4Xiu2AZAnIWowoW0VkVBVUcuurNytm+VqRvXWP9eg+Y9CB Fu33YBnxgyYm6WzQoNOh16MuDW9k9Yfnn3NOqrz2sAo816a1KIB1g0KQ= X-Google-Smtp-Source: AGHT+IEqSvjhcbV70OZ3wAhAt2mdk+xL/neDSrwnlUXU2m5SLnuO6n9+pjJfDjCBYLTcvZ78EZKlc0Wxi7uOmv0jc9hCoHVykCF7 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:1d87:b0:35f:8652:5ce8 with SMTP id h7-20020a056e021d8700b0035f86525ce8mr11312ila.4.1705537084801; Wed, 17 Jan 2024 16:18:04 -0800 (PST) Date: Wed, 17 Jan 2024 16:18:04 -0800 In-Reply-To: <20240117234304.1250-1-hdanton@sina.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000001749b1060f2d4cba@google.com> Subject: Re: [syzbot] [net?] KASAN: use-after-free Read in __skb_flow_dissect (3) From: syzbot To: hdanton@sina.com, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: KASAN: use-after-free Read in nf_ct_get_tuple ================================================================== BUG: KASAN: use-after-free in nf_ct_get_tuple+0x773/0x790 net/netfilter/nf_conntrack_core.c:301 Read of size 4 at addr ffff88813de50006 by task syz-executor.0/5493 CPU: 1 PID: 5493 Comm: syz-executor.0 Not tainted 6.7.0-syzkaller-gd8e6ba025f5e-dirty #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:377 [inline] print_report+0xc4/0x620 mm/kasan/report.c:488 kasan_report+0xda/0x110 mm/kasan/report.c:601 nf_ct_get_tuple+0x773/0x790 net/netfilter/nf_conntrack_core.c:301 resolve_normal_ct net/netfilter/nf_conntrack_core.c:1824 [inline] nf_conntrack_in+0x48f/0x1850 net/netfilter/nf_conntrack_core.c:1998 ipv4_conntrack_local+0x160/0x260 net/netfilter/nf_conntrack_proto.c:229 nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline] nf_hook_slow+0xbb/0x1f0 net/netfilter/core.c:626 nf_hook+0x386/0x6c0 include/linux/netfilter.h:269 __ip_local_out+0x33b/0x640 net/ipv4/ip_output.c:118 ip_local_out+0x2a/0x1a0 net/ipv4/ip_output.c:127 iptunnel_xmit+0x5b4/0x9b0 net/ipv4/ip_tunnel_core.c:82 ip_tunnel_xmit+0x1daa/0x33b0 net/ipv4/ip_tunnel.c:831 ipip_tunnel_xmit+0x3cc/0x4e0 net/ipv4/ipip.c:308 __netdev_start_xmit include/linux/netdevice.h:4989 [inline] netdev_start_xmit include/linux/netdevice.h:5003 [inline] xmit_one net/core/dev.c:3547 [inline] dev_hard_start_xmit+0x137/0x6d0 net/core/dev.c:3563 __dev_queue_xmit+0x7b6/0x3ed0 net/core/dev.c:4351 dev_queue_xmit include/linux/netdevice.h:3171 [inline] neigh_connected_output+0x426/0x5d0 net/core/neighbour.c:1592 neigh_output include/net/neighbour.h:542 [inline] ip_finish_output2+0x82d/0x2540 net/ipv4/ip_output.c:235 __ip_finish_output net/ipv4/ip_output.c:313 [inline] __ip_finish_output+0x38b/0x650 net/ipv4/ip_output.c:295 ip_finish_output+0x31/0x310 net/ipv4/ip_output.c:323 NF_HOOK_COND include/linux/netfilter.h:303 [inline] ip_mc_output+0x1dd/0x6a0 net/ipv4/ip_output.c:420 dst_output include/net/dst.h:451 [inline] ip_local_out+0xaf/0x1a0 net/ipv4/ip_output.c:129 iptunnel_xmit+0x5b4/0x9b0 net/ipv4/ip_tunnel_core.c:82 ip_tunnel_xmit+0x1daa/0x33b0 net/ipv4/ip_tunnel.c:831 ipgre_xmit+0x49b/0x980 net/ipv4/ip_gre.c:665 __netdev_start_xmit include/linux/netdevice.h:4989 [inline] netdev_start_xmit include/linux/netdevice.h:5003 [inline] xmit_one net/core/dev.c:3547 [inline] dev_hard_start_xmit+0x137/0x6d0 net/core/dev.c:3563 __dev_queue_xmit+0x7b6/0x3ed0 net/core/dev.c:4351 dev_queue_xmit include/linux/netdevice.h:3171 [inline] __bpf_tx_skb net/core/filter.c:2135 [inline] __bpf_redirect_no_mac net/core/filter.c:2165 [inline] __bpf_redirect+0x6f1/0xf10 net/core/filter.c:2188 ____bpf_clone_redirect net/core/filter.c:2459 [inline] bpf_clone_redirect+0x2b2/0x420 net/core/filter.c:2431 ___bpf_prog_run+0x3e44/0xabc0 kernel/bpf/core.c:1986 __bpf_prog_run512+0xb7/0xf0 kernel/bpf/core.c:2227 bpf_dispatcher_nop_func include/linux/bpf.h:1231 [inline] __bpf_prog_run include/linux/filter.h:651 [inline] bpf_prog_run include/linux/filter.h:658 [inline] bpf_test_run+0x3d3/0x9c0 net/bpf/test_run.c:423 bpf_prog_test_run_skb+0xb75/0x1dd0 net/bpf/test_run.c:1056 bpf_prog_test_run kernel/bpf/syscall.c:4107 [inline] __sys_bpf+0x11bf/0x4a00 kernel/bpf/syscall.c:5475 __do_sys_bpf kernel/bpf/syscall.c:5561 [inline] __se_sys_bpf kernel/bpf/syscall.c:5559 [inline] __x64_sys_bpf+0x78/0xc0 kernel/bpf/syscall.c:5559 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xd3/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x7f178307cce9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f1783e5b0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f178319bf80 RCX: 00007f178307cce9 RDX: 0000000000000028 RSI: 0000000020000080 RDI: 000000000000000a RBP: 00007f17830c947a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f178319bf80 R15: 00007ffc443b33a8 The buggy address belongs to the physical page: page:ffffea0004f79400 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x13de50 flags: 0x57ff00000000000(node=1|zone=2|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 057ff00000000000 ffffea0004f79408 ffffea0004f79408 0000000000000000 raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner info is not present (never set?) Memory state around the buggy address: ffff88813de4ff00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff88813de4ff80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >ffff88813de50000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff88813de50080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff88813de50100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ================================================================== Tested on: commit: d8e6ba02 Merge tag 'thermal-6.8-rc1-2' of git://git.ke.. git tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master console output: https://syzkaller.appspot.com/x/log.txt?x=12911a0be80000 kernel config: https://syzkaller.appspot.com/x/.config?x=58b05ac7ce94e73a dashboard link: https://syzkaller.appspot.com/bug?extid=bfde3bef047a81b8fde6 compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 patch: https://syzkaller.appspot.com/x/patch.diff?x=101a3dcde80000