From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pj1-f79.google.com (mail-pj1-f79.google.com [209.85.216.79]) (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 79985285CA4 for ; Thu, 23 Apr 2026 15:01:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.216.79 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776956499; cv=none; b=JRJDQ6ukz90tUJo6X/mmKE1PeOwk/oZoznB1OQqrP92Kdz0sjCaWraPa20X7z/BthtoD8oNhievrCnQYK2p5nt99cRhwreG01bHyPY3ti6YJkFskP+VHRsCm6y4wL9nfcWcSzj8PMsPKdXKF82APMPd/4KAY6GMPDJ14MODOZEQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776956499; c=relaxed/simple; bh=VHwVLlpsrWTqBP1abZwzFeNz30fIA/BRePwh2i8mCOg=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=JScbHRHRP/teq86CdJSdUWfGeebURgj8dVl8KG8i/77NgdcRVuMxJZ45rDngv5w12VoZapH1oe9SFQS/pbf26zBsFwaKOfnRRkN9/zwTrqxL1siMWJDiLDxlWoRD3l1kXJYhsk3xNxh+Ytvd87ZQrUnQtSa27t6vForsCKnGYTo= 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=209.85.216.79 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-pj1-f79.google.com with SMTP id 98e67ed59e1d1-354490889b6so10069041a91.3 for ; Thu, 23 Apr 2026 08:01:38 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1776956498; x=1777561298; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=nAQRE7OtQqJHxCIaYW0UVulzAtpXqWFrLC5bRMtblss=; b=XqeJiPFojupqujKUfcyhgFuj/4NDgN0zctosHme8EEiKtFzyA8LB0U89CiFJSey8mj zkP7qTsaIP/RjlAj047aZGdUEX7f8ZPVZqBEVY5XOyOzgbrqEg0iyVwBxiG1+B1sQg+B GDz5BZFGqFP1gTdNcibXXQA6l/fH96CdAW2kCwX90Iwv2V/2qrdbb8YHOEcmD9C/1l2G ps75hYOJn8YTMOtj2tAKpV79tmQRYViwbawBb6Jw7dYYzKGprX4aQbpIj9by94IvK5W4 T/MU0GLBSN+UKNJX95HxQvOR9VXoi9ntz2jzozqqto+O3+Z1XSM9hdRWkadKcL4jO4Ow QN8w== X-Forwarded-Encrypted: i=1; AFNElJ/zyWz5C1qXI5GlMhSdKU9ZF6hk4cr6YlIFa0AfJ7dsHia9I+68rsfDQZhUr6BM8N0hypjg4l4=@vger.kernel.org X-Gm-Message-State: AOJu0YwK1gDX6TcviwSXsbexII+Y9AUDtijc4YHDgRgLlunDT3jiXgfc dssx4EfLAueZSmJnBanaBBYB9sznEquEBkTxFg1UIn5Sja0Wz/GX6LJAhstq4d7AhPSbzMNET2i Cp7V/9MiC+ESzlnMKELF5agOuXnoklXAzSj8cDDVuKGvUJ79EMvUMkVGQlPU= Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a17:90b:3504:b0:35f:b6a1:8d27 with SMTP id 98e67ed59e1d1-3614046f76amr30409089a91.18.1776956495925; Thu, 23 Apr 2026 08:01:35 -0700 (PDT) Date: Thu, 23 Apr 2026 08:01:35 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <69ea344f.a00a0220.17a17.0040.GAE@google.com> Subject: [syzbot] [net?] general protection fault in kernel_sock_shutdown (4) From: syzbot To: davem@davemloft.net, dsahern@kernel.org, edumazet@google.com, horms@kernel.org, kuba@kernel.org, linux-kernel@vger.kernel.org, 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: 6596a02b2078 Merge tag 'drm-next-2026-04-22' of https://gi.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=10d5acce580000 kernel config: https://syzkaller.appspot.com/x/.config?x=3e19fa1907a3dfda dashboard link: https://syzkaller.appspot.com/bug?extid=d8f76778263ab65c2b21 compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-6596a02b.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/1e78cc4623b5/vmlinux-6596a02b.xz kernel image: https://storage.googleapis.com/syzbot-assets/7ae78b19bafa/bzImage-6596a02b.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+d8f76778263ab65c2b21@syzkaller.appspotmail.com Oops: general protection fault, probably for non-canonical address 0xdffffc000000000d: 0000 [#1] SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x0000000000000068-0x000000000000006f] CPU: 3 UID: 0 PID: 12652 Comm: syz.7.1709 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 RIP: 0010:kernel_sock_shutdown+0x47/0x70 net/socket.c:3785 Code: fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 33 48 b8 00 00 00 00 00 fc ff df 4c 8b 63 20 49 8d 7c 24 68 48 89 fa 48 c1 ea 03 <80> 3c 02 00 75 1a 49 8b 44 24 68 89 ee 48 89 df 5b 5d 41 5c e9 46 RSP: 0018:ffffc9000566f180 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: ffff888058587240 RCX: 0000000000000000 RDX: 000000000000000d RSI: ffffffff895ced12 RDI: 0000000000000068 RBP: 0000000000000002 R08: 0000000000000001 R09: ffffed1006d98945 R10: ffff888036cc4a2b R11: 0000003683c25c00 R12: 0000000000000000 R13: ffff88805c998000 R14: 0000000000000002 R15: 0000000000000018 FS: 00007f1306d976c0(0000) GS:ffff8880d65db000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f1306d97d58 CR3: 00000000404f1000 CR4: 0000000000352ef0 DR0: ffffffffffffffff DR1: 00000000000001f8 DR2: 0000000000000002 DR3: ffffffffefffff15 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Call Trace: udp_tunnel_sock_release+0x68/0x80 net/ipv4/udp_tunnel_core.c:202 rxe_release_udp_tunnel drivers/infiniband/sw/rxe/rxe_net.c:294 [inline] rxe_sock_put+0xae/0x130 drivers/infiniband/sw/rxe/rxe_net.c:639 rxe_net_del+0x83/0x120 drivers/infiniband/sw/rxe/rxe_net.c:660 rxe_dellink+0x15/0x20 drivers/infiniband/sw/rxe/rxe.c:254 nldev_dellink+0x289/0x3c0 drivers/infiniband/core/nldev.c:1849 rdma_nl_rcv_msg+0x392/0x6f0 drivers/infiniband/core/netlink.c:195 rdma_nl_rcv_skb.constprop.0.isra.0+0x2cb/0x410 drivers/infiniband/core/netlink.c:239 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline] netlink_unicast+0x585/0x850 net/netlink/af_netlink.c:1344 netlink_sendmsg+0x8b0/0xda0 net/netlink/af_netlink.c:1894 sock_sendmsg_nosec net/socket.c:787 [inline] __sock_sendmsg net/socket.c:802 [inline] ____sys_sendmsg+0x9e1/0xb70 net/socket.c:2698 ___sys_sendmsg+0x190/0x1e0 net/socket.c:2752 __sys_sendmsg+0x170/0x220 net/socket.c:2784 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x10b/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f1305f9c819 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:00007f1306d97028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f1306216090 RCX: 00007f1305f9c819 RDX: 0000000000000000 RSI: 00002000000002c0 RDI: 0000000000000003 RBP: 00007f1306032c91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f1306216128 R14: 00007f1306216090 R15: 00007ffd8ecad288 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:kernel_sock_shutdown+0x47/0x70 net/socket.c:3785 Code: fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 33 48 b8 00 00 00 00 00 fc ff df 4c 8b 63 20 49 8d 7c 24 68 48 89 fa 48 c1 ea 03 <80> 3c 02 00 75 1a 49 8b 44 24 68 89 ee 48 89 df 5b 5d 41 5c e9 46 RSP: 0018:ffffc9000566f180 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: ffff888058587240 RCX: 0000000000000000 RDX: 000000000000000d RSI: ffffffff895ced12 RDI: 0000000000000068 RBP: 0000000000000002 R08: 0000000000000001 R09: ffffed1006d98945 R10: ffff888036cc4a2b R11: 0000003683c25c00 R12: 0000000000000000 R13: ffff88805c998000 R14: 0000000000000002 R15: 0000000000000018 FS: 00007f1306d976c0(0000) GS:ffff8880d64db000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000317000 CR3: 00000000404f1000 CR4: 0000000000352ef0 DR0: ffffffffffffffff DR1: 00000000000001f8 DR2: 0000000000000002 DR3: ffffffffefffff15 DR6: 00000000ffff0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: fc cld 1: ff lcall (bad) 2: df 48 89 fisttps -0x77(%rax) 5: fa cli 6: 48 c1 ea 03 shr $0x3,%rdx a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) e: 75 33 jne 0x43 10: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 17: fc ff df 1a: 4c 8b 63 20 mov 0x20(%rbx),%r12 1e: 49 8d 7c 24 68 lea 0x68(%r12),%rdi 23: 48 89 fa mov %rdi,%rdx 26: 48 c1 ea 03 shr $0x3,%rdx * 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 2e: 75 1a jne 0x4a 30: 49 8b 44 24 68 mov 0x68(%r12),%rax 35: 89 ee mov %ebp,%esi 37: 48 89 df mov %rbx,%rdi 3a: 5b pop %rbx 3b: 5d pop %rbp 3c: 41 5c pop %r12 3e: e9 .byte 0xe9 3f: 46 rex.RX --- 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