From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-ot1-f78.google.com (mail-ot1-f78.google.com [209.85.210.78]) (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 3F947345745 for ; Wed, 25 Mar 2026 10:43:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.78 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774435407; cv=none; b=aRLVqkxQxRJ4y/L7rlDv+flgkgmAenDUSon1w7EewOajSn144N31Y/7wejOBDgi2h2197qkSVOSNh6C8/GuuX9d7TQmoPNsBGs3NL8OYG83tiGDFGiXSXF94Cxo+w33svU1ug8yFeZKFnzpxvuJo4Bl4IfrTCswsWJkzcVU5zjM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774435407; c=relaxed/simple; bh=EpCa41f+ImsOaxJSobe6vFrpMru+7r0uox9JCSRec3w=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=Ev00+cDJlgur6MxQcSCnjlG+QA9cgMD/tRCu62wni6H/JjOoagaMwtpTz1ruaCBgH2lKwzQ1bCVEt6+Do4DpYh3V2UNyYBRBTK8Dj8aNxuv8C1Ie1PmsolBNWDW4n1sZ3B0g2l85dMfmlGnQfHxWpM6HG7jrzlXGSby/wfIIPKY= 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=209.85.210.78 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-ot1-f78.google.com with SMTP id 46e09a7af769-7d9d60f8e3aso1517185a34.3 for ; Wed, 25 Mar 2026 03:43:26 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1774435405; x=1775040205; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=HdTKGlYAE0ZLLD9yPYoY3gBug1GkpRFhsMVayRE6Xxw=; b=rY/B0Z6FYXT1Xo34eFgeCxcZh/9DQY+2hXeYhqwunOCHorD3gvh3lKPWujSF39QOBp WKOS60cNJRwq9WM5njJ2ofOanv29ZrdPSYPGZ6N454ulkqamCdekKSiXA0D798m0J2PR JmB+G/vUxgsLTEOriJw9cWcW3GWS/DTBsym239uZcLspNbr3UzQifRIFXL+sUDi4/ZmF QrKLcKOFp2b1FN17lVdveNRVws5yKOXObhHrhQMiA4pJ+GrxaTwguGn4s+fE3r0fvVnR x2l2VM+deExRsPQJvmobA2tKZ/ks7wGkwTkmME0VFJcW5HkCsP2rFT+7RlSwa0j1c58v oS4Q== X-Forwarded-Encrypted: i=1; AJvYcCWctAWtjtwky1rpE30hItJp9UCN+Xa22RNk7faICo3sGHiyiFbxIqorgvrxlgq+rnwJfg2dtv4=@vger.kernel.org X-Gm-Message-State: AOJu0YwOgqG0038CW+0W9HVyA7aquWF6+6j5axg5UnfYpcyjWkXhBOld oOTMLsRIrbmuunPz8/d1EuD2Q4VXX/pbWPy2QkCymmTiBHD9G+Lt2JbLC3lzolAwP7GuIOBHmY+ PXUAM3351Yy/NlvsbRmK4TB8xD3YmwLE+ILhR+REr26qlo/JzWTz6/2c/zaE= Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:221d:b0:67b:afd7:ab03 with SMTP id 006d021491bc7-67dff3d07bamr1537070eaf.7.1774435405246; Wed, 25 Mar 2026 03:43:25 -0700 (PDT) Date: Wed, 25 Mar 2026 03:43:25 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <69c3bc4d.a70a0220.234938.004d.GAE@google.com> Subject: [syzbot] [net?] general protection fault in lec_atm_close From: syzbot To: davem@davemloft.net, 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: b1c803d5c816 net: airoha: Rework the code flow in airoha_r.. git tree: net-next console output: https://syzkaller.appspot.com/x/log.txt?x=135ad6da580000 kernel config: https://syzkaller.appspot.com/x/.config?x=71d49d824b43a0d9 dashboard link: https://syzkaller.appspot.com/bug?extid=895d65bfe6336a274498 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/09cf620a7914/disk-b1c803d5.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/72906e01e665/vmlinux-b1c803d5.xz kernel image: https://storage.googleapis.com/syzbot-assets/e1bab2219b98/bzImage-b1c803d5.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+895d65bfe6336a274498@syzkaller.appspotmail.com Oops: general protection fault, probably for non-canonical address 0xdffffc00000001d5: 0000 [#1] SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000ea8-0x0000000000000eaf] CPU: 1 UID: 0 PID: 6673 Comm: syz.0.204 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 RIP: 0010:lec_atm_close+0x60/0x9e0 net/atm/lec.c:492 Code: 74 08 4c 89 f7 e8 30 32 56 f7 49 8b 06 48 89 44 24 10 48 8d b8 a8 0e 00 00 48 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 05 e8 f5 32 56 f7 48 8b 5c 24 10 48 c7 83 a8 0e 00 RSP: 0018:ffffc90010117c28 EFLAGS: 00010202 RAX: 00000000000001d5 RBX: dffffc0000000000 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000ea8 RBP: ffff8880573c4698 R08: ffff888055d9157f R09: 1ffff1100abb22af R10: dffffc0000000000 R11: ffffffff8ad9b0c0 R12: ffffffff8ad9b0c0 R13: 1ffff1100abb22b3 R14: ffff888055d91650 R15: ffff888055d91598 FS: 00005555597c6500(0000) GS:ffff888125561000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b30b22ff8 CR3: 0000000076908000 CR4: 00000000003526f0 Call Trace: vcc_destroy_socket net/atm/common.c:181 [inline] vcc_release+0x10f/0x580 net/atm/common.c:205 svc_release+0x6c/0xd0 net/atm/svc.c:95 __sock_release net/socket.c:656 [inline] sock_close+0xc3/0x240 net/socket.c:1448 __fput+0x44f/0xa70 fs/file_table.c:469 task_work_run+0x1d9/0x270 kernel/task_work.c:233 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] __exit_to_user_mode_loop kernel/entry/common.c:67 [inline] exit_to_user_mode_loop+0xed/0x480 kernel/entry/common.c:98 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline] syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:325 [inline] do_syscall_64+0x32d/0xf80 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fe00099c799 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:00007ffdf9827468 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 RAX: 0000000000000000 RBX: 00007fe000c17da0 RCX: 00007fe00099c799 RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 RBP: 00007fe000c17da0 R08: 00007fe000c16218 R09: 0000000000000000 R10: 00000000003fe888 R11: 0000000000000246 R12: 000000000001d068 R13: 00007fe000c1618c R14: 000000000001cfe6 R15: 00007ffdf9827570 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:lec_atm_close+0x60/0x9e0 net/atm/lec.c:492 Code: 74 08 4c 89 f7 e8 30 32 56 f7 49 8b 06 48 89 44 24 10 48 8d b8 a8 0e 00 00 48 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 05 e8 f5 32 56 f7 48 8b 5c 24 10 48 c7 83 a8 0e 00 RSP: 0018:ffffc90010117c28 EFLAGS: 00010202 RAX: 00000000000001d5 RBX: dffffc0000000000 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000ea8 RBP: ffff8880573c4698 R08: ffff888055d9157f R09: 1ffff1100abb22af R10: dffffc0000000000 R11: ffffffff8ad9b0c0 R12: ffffffff8ad9b0c0 R13: 1ffff1100abb22b3 R14: ffff888055d91650 R15: ffff888055d91598 FS: 00005555597c6500(0000) GS:ffff888125461000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fcdbc1e92f8 CR3: 0000000076908000 CR4: 00000000003526f0 ---------------- Code disassembly (best guess): 0: 74 08 je 0xa 2: 4c 89 f7 mov %r14,%rdi 5: e8 30 32 56 f7 call 0xf756323a a: 49 8b 06 mov (%r14),%rax d: 48 89 44 24 10 mov %rax,0x10(%rsp) 12: 48 8d b8 a8 0e 00 00 lea 0xea8(%rax),%rdi 19: 48 89 f8 mov %rdi,%rax 1c: 48 c1 e8 03 shr $0x3,%rax 20: 48 b9 00 00 00 00 00 movabs $0xdffffc0000000000,%rcx 27: fc ff df * 2a: 80 3c 08 00 cmpb $0x0,(%rax,%rcx,1) <-- trapping instruction 2e: 74 05 je 0x35 30: e8 f5 32 56 f7 call 0xf756332a 35: 48 8b 5c 24 10 mov 0x10(%rsp),%rbx 3a: 48 rex.W 3b: c7 .byte 0xc7 3c: 83 .byte 0x83 3d: a8 0e test $0xe,%al --- 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