From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f208.google.com (mail-il1-f208.google.com [209.85.166.208]) (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 D4B242D7803 for ; Tue, 16 Sep 2025 12:39:32 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.208 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758026374; cv=none; b=HhNcjuOavLk8DbN67Yay9Ru5cSZzXtfIiYdj1gwwJ+JbhcYnSRX6lnWArRlZZWhapcGzjBKMzZoe5M9VqcQLd9PN82kVIIt8xG4s+xKhjyGwsdu60pp4x2BX4EfYe9hi9i3AQyxLL20i06gqB3iqb4Geifm85h97qxsQcstkdxs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758026374; c=relaxed/simple; bh=QnaAg1bLGcETNswOB8njO+r16+K8dbnzNG95X21FNTg=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=XPVdEG87Fb4Iarpcp2Hue/c0vMqrTxkteAS89eU9UT/HAtQwb0Fs0+ZKelWSBAhCB9FbDKddf2jRImHyCqqQLazqxiW7G6CTtsqSuYdmMFrLnuRcC25cgS313OEXVWJFmfeXseoNangxsIMPGfC7QJ1InyPBKl20t0KPQLad33g= 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=209.85.166.208 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-il1-f208.google.com with SMTP id e9e14a558f8ab-4133da01bdcso91628795ab.0 for ; Tue, 16 Sep 2025 05:39:32 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1758026372; x=1758631172; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=64U5E7gIzbva7KDlrC7FVt5MKnXcg0Dmzp+8PIgeta0=; b=Wm3bj4bLL0YGv5zXPCAHxXnDb/sCnNveADovfB4/GdRzFUg1NZGZwHhZMpl52FyrPW Z0uTATdvzaZovjXO845IJQpNgTEWQoq2CYdQtOkoPqk6Ii62Gvf6Q1Nt0wvAmDTLr+oz SNcHrz2O7qJsXhZYM8kWhbRwdVgQ58AZO1SKmTOsLAgR2iWOqAWRMNCjKg5/TsTGShmH kCtzILtJxbPaXMuMuILF64q/hRMW1HuVC6hAglhCWrjoUympBJVL4CkRHGEe0N+YYhIh POQhDqsWnbW0qTvkT/scAxUe3Hp+N7wmzYxh4t0yTTpxgfLVkEOJVyS6M+sZC5NlBBp3 E25g== X-Forwarded-Encrypted: i=1; AJvYcCULaKwVtzb6X9Zlfo5F/pInLp0oRaNPl5LR768KEoXUdrkQC8Opv7V1+QhIzLWEgeBX0sZ5NDY=@vger.kernel.org X-Gm-Message-State: AOJu0YynJdJfz/bgTJtWovQ6jPIywv+kouOLf7oA0y9Me62SaghV/mMk IgTlCqYy4wiZq1su1Wh1O3Tqc7NIAmKigJeYAK9bWOE+O5cSts3JkBhsxUEB/WBaPbC/5K+SXcE AQ6fGBuaEngaMeNQgeNWXqBootKiGqWTm6WOdiQWCRxjCMSy5X57HdtrLEak= X-Google-Smtp-Source: AGHT+IHH8YPBRYC4cnO7g8hl4hrLcnrJaC3pfiMamEolxPE6s6cC642aOx+nPkjK55+AGtz89+f9uP1FrZkrhT6y9tGqF0uUrYqI Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:1707:b0:41e:c3da:57c0 with SMTP id e9e14a558f8ab-424114f1f18mr15123005ab.12.1758026371854; Tue, 16 Sep 2025 05:39:31 -0700 (PDT) Date: Tue, 16 Sep 2025 05:39:31 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <68c95a83.050a0220.3c6139.0e5c.GAE@google.com> Subject: [syzbot] [net?] general protection fault in lec_arp_clear_vccs 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: 2690cb089502 dpaa2-switch: fix buffer pool seeding for con.. git tree: net console output: https://syzkaller.appspot.com/x/log.txt?x=106c1934580000 kernel config: https://syzkaller.appspot.com/x/.config?x=4d8792ecb6308d0f dashboard link: https://syzkaller.appspot.com/bug?extid=72e3ea390c305de0e259 compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/bd85e520a303/disk-2690cb08.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/10d3787341cc/vmlinux-2690cb08.xz kernel image: https://storage.googleapis.com/syzbot-assets/c1556e02902a/bzImage-2690cb08.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+72e3ea390c305de0e259@syzkaller.appspotmail.com Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 0 UID: 0 PID: 27966 Comm: syz.1.7437 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 RIP: 0010:lec_arp_clear_vccs+0xad/0x380 net/atm/lec.c:1263 Code: e8 03 80 3c 28 00 74 08 4c 89 e7 e8 9d e0 76 f7 4c 89 74 24 18 49 8b 2c 24 4c 89 e8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 4c 89 ef e8 75 e0 76 f7 4d 8b 75 00 4d 8d a7 18 RSP: 0018:ffffc9001c217bd0 EFLAGS: 00010046 RAX: 0000000000000000 RBX: ffff8880528ad400 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: ffffffff8be33be0 RDI: ffff8880528ad400 RBP: ffff88802e2c2000 R08: ffffffff8e8e2db3 R09: 1ffffffff1d1c5b6 R10: dffffc0000000000 R11: fffffbfff1d1c5b7 R12: ffff88807df10638 R13: 0000000000000000 R14: ffff8880528ad430 R15: ffff88807df10000 FS: 000055555dcab500(0000) GS:ffff888125c15000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f2733b056c0 CR3: 000000007e312000 CR4: 00000000003526f0 Call Trace: lec_vcc_close net/atm/lec.c:2183 [inline] lec_push+0x3cb/0x1860 net/atm/lec.c:594 vcc_destroy_socket net/atm/common.c:183 [inline] vcc_release+0x157/0x460 net/atm/common.c:205 svc_release+0x6b/0xb0 net/atm/svc.c:95 __sock_release net/socket.c:649 [inline] sock_close+0xc3/0x240 net/socket.c:1439 __fput+0x449/0xa70 fs/file_table.c:468 task_work_run+0x1d1/0x260 kernel/task_work.c:227 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop+0xec/0x110 kernel/entry/common.c:43 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline] syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline] do_syscall_64+0x2bd/0x3b0 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f114b78eba9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fff6f7d2028 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 RAX: 0000000000000000 RBX: 00007f114b9d7da0 RCX: 00007f114b78eba9 RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 RBP: 00007f114b9d7da0 R08: 0000000000000000 R09: 0000000d6f7d231f R10: 000000000003fd58 R11: 0000000000000246 R12: 00000000000a243d R13: 00007fff6f7d2120 R14: ffffffffffffffff R15: 00007fff6f7d2140 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:lec_arp_clear_vccs+0xad/0x380 net/atm/lec.c:1263 Code: e8 03 80 3c 28 00 74 08 4c 89 e7 e8 9d e0 76 f7 4c 89 74 24 18 49 8b 2c 24 4c 89 e8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 4c 89 ef e8 75 e0 76 f7 4d 8b 75 00 4d 8d a7 18 RSP: 0018:ffffc9001c217bd0 EFLAGS: 00010046 RAX: 0000000000000000 RBX: ffff8880528ad400 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: ffffffff8be33be0 RDI: ffff8880528ad400 RBP: ffff88802e2c2000 R08: ffffffff8e8e2db3 R09: 1ffffffff1d1c5b6 R10: dffffc0000000000 R11: fffffbfff1d1c5b7 R12: ffff88807df10638 R13: 0000000000000000 R14: ffff8880528ad430 R15: ffff88807df10000 FS: 000055555dcab500(0000) GS:ffff888125c15000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f2733b056c0 CR3: 000000007e312000 CR4: 00000000003526f0 ---------------- Code disassembly (best guess): 0: e8 03 80 3c 28 call 0x283c8008 5: 00 74 08 4c add %dh,0x4c(%rax,%rcx,1) 9: 89 e7 mov %esp,%edi b: e8 9d e0 76 f7 call 0xf776e0ad 10: 4c 89 74 24 18 mov %r14,0x18(%rsp) 15: 49 8b 2c 24 mov (%r12),%rbp 19: 4c 89 e8 mov %r13,%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 08 je 0x38 30: 4c 89 ef mov %r13,%rdi 33: e8 75 e0 76 f7 call 0xf776e0ad 38: 4d 8b 75 00 mov 0x0(%r13),%r14 3c: 4d rex.WRB 3d: 8d .byte 0x8d 3e: a7 cmpsl %es:(%rdi),%ds:(%rsi) 3f: 18 .byte 0x18 --- 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