From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oi1-f205.google.com (mail-oi1-f205.google.com [209.85.167.205]) (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 D22F03A75B8 for ; Fri, 12 Jun 2026 16:19:32 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.167.205 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781281174; cv=none; b=e82Lj9zsmZL9YvWLDWCpn1+OcNln7QrspEv7ejAtzsntPdxwzlAG6TmwZSNKZhkR2xODj7JpK9SmGBCk2/Tp1jY/NxHLjk5/2EhNH2TVh0mkrypCyDw/nIfnMRyXLig37sAWxZuW+XlvYcs9x9piqRnrko5cEMquj7X9obqAW7g= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781281174; c=relaxed/simple; bh=xG1b5RA5EjTwuo0QEPDrP5P00DN3AHw4OltefDv/Zl0=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=TbHG6MJUTYIkObcdXavxBf9A/YJotlffSBFkqGRVlVvfrEdG325LKPhGz5Sg+iLwjGGFVEr1btYq8NIPkPboBGymhRkPfFNil/MtQZdEfmN2Sjc7yl0DACnnJFpwGNC0kOwsY2H6aJHUZ6lLZmzZWGxcwrP1n0JMTiQutreze7g= 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=209.85.167.205 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-oi1-f205.google.com with SMTP id 5614622812f47-4863a0c3105so1663801b6e.3 for ; Fri, 12 Jun 2026 09:19:32 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1781281172; x=1781885972; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=V1N2V6o2n8ONSn3aBAQVinhsAGOzj30etEFz/nPGQw8=; b=Jtbn6c7B67R0ljBRzvquD0Gj4p5/RDAoMLCSYKKkdaxk/o+rVLf5Zl1YfhDHhLOiCg ldC01HoTubrXnM7/HcbZX3giGmdrukuB131Ele+CYQzYvv37lbgwZqTzIbrDhPNEK+W6 VIzRJ+7boxvdoRaV6QCWYQ693XlReldcp8cMHoW8uxIylaHXuCmZCZq0urSX20tZYLdi QGV65ZnqzSqJq3fNdoPCJYZPh8NeKNE3mhcawljuo/Km2FcDcjKYfLAz2QryGDdXI+Un LIvvsiR7cLChbBQ/ejft3jwhqcFgdqrliow4si7pceUtyoO+TpGAWEpReSF6JRqrahiE J+rQ== X-Forwarded-Encrypted: i=1; AFNElJ+cdFcFxOs/g/EAHBvxzLBRdJBT5hOO17YR2+amiDHSdbyGy6bCjXgiVRgji8KQHC4cjwLlLw8=@vger.kernel.org X-Gm-Message-State: AOJu0YwPMOeQZ8lDAUtQc+IclIU2dYtW96aERFptEZfpbBrKjtl2jxoT 2nCciuEPfpoIMGL9MM/aZDouyf/GgWo8tBv2lParKtn5FbzL8Nna5oIB3/pgMuFpoY1oOhrjXXr jpzL6JzFF38XQ3cNMLbq8sDiMtmFhfbbjll0Y3zm34l+RaQFf1DIg4BzBMt8= Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6808:221c:b0:479:d779:353e with SMTP id 5614622812f47-4872f4a088amr2276021b6e.24.1781281171885; Fri, 12 Jun 2026 09:19:31 -0700 (PDT) Date: Fri, 12 Jun 2026 09:19:31 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a2c3193.8812e0fc.3c3fa4.0001.GAE@google.com> Subject: [syzbot] [net?] general protection fault in skb_segment (5) From: syzbot To: davem@davemloft.net, dsahern@kernel.org, edumazet@google.com, horms@kernel.org, kuba@kernel.org, kuniyu@google.com, linux-kernel@vger.kernel.org, ncardwell@google.com, netdev@vger.kernel.org, pabeni@redhat.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: e7aa57247700 Merge tag 'spi-fix-v6.19-rc8' of git://git.ke.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=10d69402580000 kernel config: https://syzkaller.appspot.com/x/.config?x=e3161cabe5a361ff dashboard link: https://syzkaller.appspot.com/bug?extid=ebdb22d461c904fc3cb2 compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/8243bfd07948/disk-e7aa5724.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/65477df56f75/vmlinux-e7aa5724.xz kernel image: https://storage.googleapis.com/syzbot-assets/0674f6c7c67d/bzImage-e7aa5724.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+ebdb22d461c904fc3cb2@syzkaller.appspotmail.com Oops: general protection fault, probably for non-canonical address 0xdffffc000000000e: 0000 [#1] SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000070-0x0000000000000077] CPU: 0 UID: 0 PID: 21038 Comm: syz.4.3937 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026 RIP: 0010:skb_segment+0x2ac4/0x3f80 net/core/skbuff.c:4848 Code: 00 00 00 8b 6c 24 58 81 7c 24 14 ff ff 00 00 0f 85 1c e1 ff ff e8 ec d1 60 f8 48 8b 44 24 20 48 8d 58 70 48 89 d8 48 c1 e8 03 <42> 0f b6 04 38 84 c0 0f 85 14 09 00 00 8b 1b e9 21 e1 ff ff e8 c3 RSP: 0018:ffffc90000006230 EFLAGS: 00010202 RAX: 000000000000000e RBX: 0000000000000070 RCX: ffff88801bb88000 RDX: 0000000000000100 RSI: ffff888049e648ee RDI: 000000000000ffff RBP: 0000000000000003 R08: ffff88801bb88000 R09: 0000000000000002 R10: 000000000000a888 R11: 0000000000000100 R12: ffff888049e648e0 R13: 00000000fffffff8 R14: 0000000000000000 R15: dffffc0000000000 FS: 00007f1163fb46c0(0000) GS:ffff8881256f3000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000290000 CR3: 000000002805e000 CR4: 00000000003526f0 DR0: 0000000000000008 DR1: 0000000000000002 DR2: 0000000000000404 DR3: ffffffffefffff14 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Call Trace: tcp_gso_segment+0x424/0x1a40 net/ipv4/tcp_offload.c:181 ipv6_gso_segment+0xb80/0x2200 net/ipv6/ip6_offload.c:154 skb_mac_gso_segment+0x325/0x650 net/core/gso.c:53 __skb_gso_segment+0x376/0x540 net/core/gso.c:124 skb_gso_segment include/net/gso.h:83 [inline] validate_xmit_skb+0xa13/0x1440 net/core/dev.c:4018 validate_xmit_skb_list+0x84/0x120 net/core/dev.c:4068 sch_direct_xmit+0xdf/0x4c0 net/sched/sch_generic.c:332 qdisc_restart net/sched/sch_generic.c:412 [inline] __qdisc_run+0xa8d/0x1540 net/sched/sch_generic.c:420 qdisc_run include/net/pkt_sched.h:120 [inline] __dev_xmit_skb net/core/dev.c:4265 [inline] __dev_queue_xmit+0x1bbe/0x3850 net/core/dev.c:4798 NF_HOOK_COND include/linux/netfilter.h:307 [inline] ip6_output+0x340/0x550 net/ipv6/ip6_output.c:247 NF_HOOK include/linux/netfilter.h:318 [inline] ip6_xmit+0x120f/0x19d0 net/ipv6/ip6_output.c:371 inet6_csk_xmit+0x4a5/0x750 net/ipv6/inet6_connection_sock.c:120 __tcp_transmit_skb+0x20b6/0x3ad0 net/ipv4/tcp_output.c:1631 tcp_transmit_skb net/ipv4/tcp_output.c:1649 [inline] tcp_write_xmit+0x16e8/0x6980 net/ipv4/tcp_output.c:3002 __tcp_push_pending_frames+0x97/0x380 net/ipv4/tcp_output.c:3185 tcp_push_pending_frames include/net/tcp.h:2224 [inline] tcp_data_snd_check net/ipv4/tcp_input.c:5896 [inline] tcp_rcv_established+0xfee/0x25b0 net/ipv4/tcp_input.c:6476 tcp_v6_do_rcv+0x8eb/0x1ba0 net/ipv6/tcp_ipv6.c:1607 tcp_v6_rcv+0x2811/0x3110 net/ipv6/tcp_ipv6.c:1877 ip6_protocol_deliver_rcu+0xa73/0x1600 net/ipv6/ip6_input.c:438 ip6_input_finish+0x191/0x370 net/ipv6/ip6_input.c:489 NF_HOOK+0x336/0x3c0 include/linux/netfilter.h:318 ip6_input+0x16a/0x270 net/ipv6/ip6_input.c:500 NF_HOOK+0x336/0x3c0 include/linux/netfilter.h:318 __netif_receive_skb_one_core net/core/dev.c:6152 [inline] __netif_receive_skb net/core/dev.c:6265 [inline] process_backlog+0x7dd/0x1950 net/core/dev.c:6617 __napi_poll+0xae/0x340 net/core/dev.c:7681 napi_poll net/core/dev.c:7744 [inline] net_rx_action+0x627/0xf70 net/core/dev.c:7896 handle_softirqs+0x22a/0x7c0 kernel/softirq.c:622 do_softirq+0x76/0xd0 kernel/softirq.c:523 __local_bh_enable_ip+0xf8/0x130 kernel/softirq.c:450 sk_wait_data+0x20e/0x4d0 net/core/sock.c:3264 tcp_recvmsg_locked+0xd71/0x35b0 net/ipv4/tcp.c:2776 tcp_recvmsg+0x213/0x7f0 net/ipv4/tcp.c:2927 inet6_recvmsg+0x13e/0x6c0 net/ipv6/af_inet6.c:678 sock_recvmsg_nosec net/socket.c:1078 [inline] sock_recvmsg+0x105/0x270 net/socket.c:1100 __sys_recvfrom+0x240/0x3c0 net/socket.c:2256 __do_sys_recvfrom net/socket.c:2271 [inline] __se_sys_recvfrom net/socket.c:2267 [inline] __x64_sys_recvfrom+0xde/0x100 net/socket.c:2267 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f1165d9aeb9 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:00007f1163fb4028 EFLAGS: 00000246 ORIG_RAX: 000000000000002d RAX: ffffffffffffffda RBX: 00007f1166016180 RCX: 00007f1165d9aeb9 RDX: fffffffffffffd0b RSI: 0000200000000080 RDI: 0000000000000006 RBP: 00007f1165e08c1f R08: 0000000000000000 R09: fffffffffffffd25 R10: 00000000c9100120 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f1166016218 R14: 00007f1166016180 R15: 00007f116613fa48 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:skb_segment+0x2ac4/0x3f80 net/core/skbuff.c:4848 Code: 00 00 00 8b 6c 24 58 81 7c 24 14 ff ff 00 00 0f 85 1c e1 ff ff e8 ec d1 60 f8 48 8b 44 24 20 48 8d 58 70 48 89 d8 48 c1 e8 03 <42> 0f b6 04 38 84 c0 0f 85 14 09 00 00 8b 1b e9 21 e1 ff ff e8 c3 RSP: 0018:ffffc90000006230 EFLAGS: 00010202 RAX: 000000000000000e RBX: 0000000000000070 RCX: ffff88801bb88000 RDX: 0000000000000100 RSI: ffff888049e648ee RDI: 000000000000ffff RBP: 0000000000000003 R08: ffff88801bb88000 R09: 0000000000000002 R10: 000000000000a888 R11: 0000000000000100 R12: ffff888049e648e0 R13: 00000000fffffff8 R14: 0000000000000000 R15: dffffc0000000000 FS: 00007f1163fb46c0(0000) GS:ffff8881256f3000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000290000 CR3: 000000002805e000 CR4: 00000000003526f0 DR0: 0000000000000008 DR1: 0000000000000002 DR2: 0000000000000404 DR3: ffffffffefffff14 DR6: 00000000ffff0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: 00 00 add %al,(%rax) 2: 8b 6c 24 58 mov 0x58(%rsp),%ebp 6: 81 7c 24 14 ff ff 00 cmpl $0xffff,0x14(%rsp) d: 00 e: 0f 85 1c e1 ff ff jne 0xffffe130 14: e8 ec d1 60 f8 call 0xf860d205 19: 48 8b 44 24 20 mov 0x20(%rsp),%rax 1e: 48 8d 58 70 lea 0x70(%rax),%rbx 22: 48 89 d8 mov %rbx,%rax 25: 48 c1 e8 03 shr $0x3,%rax * 29: 42 0f b6 04 38 movzbl (%rax,%r15,1),%eax <-- trapping instruction 2e: 84 c0 test %al,%al 30: 0f 85 14 09 00 00 jne 0x94a 36: 8b 1b mov (%rbx),%ebx 38: e9 21 e1 ff ff jmp 0xffffe15e 3d: e8 .byte 0xe8 3e: c3 ret --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup