From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-io1-f72.google.com (mail-io1-f72.google.com [209.85.166.72]) (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 9E218194157 for ; Wed, 10 Jul 2024 16:04:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.72 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1720627464; cv=none; b=o71GaelMqy1hArbJyKI6TbZLFKi9paF5QvKLNCCALamrZIKEN3AhJhAvPCP7sIScxmxeyto5Im9zw1NtabBT09yA1Xo+Q7f2eDWy/Pr8RqPH1KGXNpgduOcgQB8sAFZmy4H5ySXU8Sv7oa0NyheASvdzVoQ6CBQL7io5nQpRGgM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1720627464; c=relaxed/simple; bh=LllsL5iYL2EuD5shk7/hyUf2cxUJt4WRXYOZLUohAaA=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=Vlv8m7SIC3/Z/O6ALrjoErG8pI61c+LnQEWpjGDYTXsXkTh/GXcP1cWzdyHMOETSQw/UKeuWpe6dcKIk2QK/55LW11gdgCuXrNOwpSrK2UIxmlPBp9B9Sh++1ONfI15ZUMsJa4d8M01CrFfWV70/u86DxA67bWb3oeNqpNZ0ccg= 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=209.85.166.72 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-io1-f72.google.com with SMTP id ca18e2360f4ac-7ec0802fd0dso774203339f.0 for ; Wed, 10 Jul 2024 09:04:22 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1720627462; x=1721232262; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=/9VI5ReAEScG64yj2PchZYwPJ7ZyvHev/6hwoti15ec=; b=Xib1OBovbAN9vVCIM6SMSeiCNqzFRc2viqW/SnE4VDhHKYg1UCxsKufM/WBBwOOlUK UociSNx97zQmu2IUgzLvzoZZoiMOghJ7JVykO/fQWQeGzQxby0hMHB1RoOndhoNdvzy3 hYJgxI2EXlckYkT2UsXiq+Oj/SoMOImFWjnKUQ+bPDOKSEfLxyECSjxaZZJe3pJAPiA9 F/tayH51otZQ1/l+tZEAKDXkyiQBO1BwqtEvCKPKyXLQHQlPWN416fDK7nipfNaFO4ul sQHDBf1q3wbkXMtUMxvLjUs37VIcGzaiOb7Ar6kgpOxP9QWopJCDHdOdKOamK1W2GClf zu9A== X-Forwarded-Encrypted: i=1; AJvYcCWELgbMGTM/MFrTKyAcrf9lCFvm7xGF0wfxh/OPBBJnxiGzldMVL2tkSUL6SBtPAZQozaqSY2eUENFDKU7fcZmKz725np583yQSWDKO X-Gm-Message-State: AOJu0YxtP988ToQyAfKD3R85V1Nx+eFLfbpZwS5/z4/GiBUL1QCIswaQ d5eMaFTCv0RFwYFGVf900XbBRTmQonA/jDbz7AqQKKgM7DPfPfTP1tJcOuiZoyPJylQoUeYHg3z b0MLc42yd59DAabgPYZBM72dOkrWqEsBgCRwJBDGVvf8V5LpXqih9JJ4= X-Google-Smtp-Source: AGHT+IG8GZ1mBJjhadsEO7HVWPtK+WeixWhH3S7AdIRZ5AsYP0f9Q5iJj6vITVB2HJGsjJBzOV+FuIFoOjymBQy3z0NYHvsBFu7Y Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6638:9827:b0:4b7:c9b5:675c with SMTP id 8926c6da1cb9f-4c0b2b907f6mr396660173.6.1720627461875; Wed, 10 Jul 2024 09:04:21 -0700 (PDT) Date: Wed, 10 Jul 2024 09:04:21 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000a7fb55061ce6cc5a@google.com> Subject: [syzbot] [net?] possible deadlock in do_ipv6_setsockopt (4) From: syzbot To: davem@davemloft.net, dsahern@kernel.org, edumazet@google.com, 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: 2f5e6395714d Merge branch 'net-pse-pd-add-new-pse-c33-feat.. git tree: net-next console output: https://syzkaller.appspot.com/x/log.txt?x=16f7e781980000 kernel config: https://syzkaller.appspot.com/x/.config?x=db697e01efa9d1d7 dashboard link: https://syzkaller.appspot.com/bug?extid=3433b5cb8b2b70933f8d compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/44296878e8d6/disk-2f5e6395.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/a3f8523e4843/vmlinux-2f5e6395.xz kernel image: https://storage.googleapis.com/syzbot-assets/c40a60a2869f/bzImage-2f5e6395.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+3433b5cb8b2b70933f8d@syzkaller.appspotmail.com ====================================================== WARNING: possible circular locking dependency detected 6.10.0-rc6-syzkaller-01258-g2f5e6395714d #0 Not tainted ------------------------------------------------------ syz.4.1060/8537 is trying to acquire lock: ffffffff8f5e7f48 (rtnl_mutex){+.+.}-{3:3}, at: do_ipv6_setsockopt+0x9e4/0x3630 net/ipv6/ipv6_sockglue.c:566 but task is already holding lock: ffff88807b8c0a50 (&smc->clcsock_release_lock){+.+.}-{3:3}, at: smc_setsockopt+0x1c3/0xe50 net/smc/af_smc.c:3064 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&smc->clcsock_release_lock){+.+.}-{3:3}: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754 __mutex_lock_common kernel/locking/mutex.c:608 [inline] __mutex_lock+0x136/0xd70 kernel/locking/mutex.c:752 smc_switch_to_fallback+0x35/0xd00 net/smc/af_smc.c:902 smc_sendmsg+0x11f/0x530 net/smc/af_smc.c:2779 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:745 __sys_sendto+0x3a4/0x4f0 net/socket.c:2192 __do_sys_sendto net/socket.c:2204 [inline] __se_sys_sendto net/socket.c:2200 [inline] __x64_sys_sendto+0xde/0x100 net/socket.c:2200 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #1 (sk_lock-AF_INET){+.+.}-{0:0}: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754 lock_sock_nested+0x48/0x100 net/core/sock.c:3543 do_ip_setsockopt+0x1a2d/0x3cd0 net/ipv4/ip_sockglue.c:1078 ip_setsockopt+0x63/0x100 net/ipv4/ip_sockglue.c:1417 do_sock_setsockopt+0x3af/0x720 net/socket.c:2312 __sys_setsockopt+0x1ae/0x250 net/socket.c:2335 __do_sys_setsockopt net/socket.c:2344 [inline] __se_sys_setsockopt net/socket.c:2341 [inline] __x64_sys_setsockopt+0xb5/0xd0 net/socket.c:2341 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (rtnl_mutex){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain+0x18e0/0x5900 kernel/locking/lockdep.c:3869 __lock_acquire+0x1346/0x1fd0 kernel/locking/lockdep.c:5137 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754 __mutex_lock_common kernel/locking/mutex.c:608 [inline] __mutex_lock+0x136/0xd70 kernel/locking/mutex.c:752 do_ipv6_setsockopt+0x9e4/0x3630 net/ipv6/ipv6_sockglue.c:566 ipv6_setsockopt+0x5c/0x1a0 net/ipv6/ipv6_sockglue.c:993 smc_setsockopt+0x275/0xe50 net/smc/af_smc.c:3072 do_sock_setsockopt+0x3af/0x720 net/socket.c:2312 __sys_setsockopt+0x1ae/0x250 net/socket.c:2335 __do_sys_setsockopt net/socket.c:2344 [inline] __se_sys_setsockopt net/socket.c:2341 [inline] __x64_sys_setsockopt+0xb5/0xd0 net/socket.c:2341 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f other info that might help us debug this: Chain exists of: rtnl_mutex --> sk_lock-AF_INET --> &smc->clcsock_release_lock Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&smc->clcsock_release_lock); lock(sk_lock-AF_INET); lock(&smc->clcsock_release_lock); lock(rtnl_mutex); *** DEADLOCK *** 1 lock held by syz.4.1060/8537: #0: ffff88807b8c0a50 (&smc->clcsock_release_lock){+.+.}-{3:3}, at: smc_setsockopt+0x1c3/0xe50 net/smc/af_smc.c:3064 stack backtrace: CPU: 1 PID: 8537 Comm: syz.4.1060 Not tainted 6.10.0-rc6-syzkaller-01258-g2f5e6395714d #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114 check_noncircular+0x36a/0x4a0 kernel/locking/lockdep.c:2187 check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain+0x18e0/0x5900 kernel/locking/lockdep.c:3869 __lock_acquire+0x1346/0x1fd0 kernel/locking/lockdep.c:5137 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754 __mutex_lock_common kernel/locking/mutex.c:608 [inline] __mutex_lock+0x136/0xd70 kernel/locking/mutex.c:752 do_ipv6_setsockopt+0x9e4/0x3630 net/ipv6/ipv6_sockglue.c:566 ipv6_setsockopt+0x5c/0x1a0 net/ipv6/ipv6_sockglue.c:993 smc_setsockopt+0x275/0xe50 net/smc/af_smc.c:3072 do_sock_setsockopt+0x3af/0x720 net/socket.c:2312 __sys_setsockopt+0x1ae/0x250 net/socket.c:2335 __do_sys_setsockopt net/socket.c:2344 [inline] __se_sys_setsockopt net/socket.c:2341 [inline] __x64_sys_setsockopt+0xb5/0xd0 net/socket.c:2341 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f0383b75bd9 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:00007f0384934048 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007f0383d03f60 RCX: 00007f0383b75bd9 RDX: 0000000000000001 RSI: 0000000000000029 RDI: 0000000000000007 RBP: 00007f0383be4aa1 R08: 0000000000000004 R09: 0000000000000000 R10: 0000000020000080 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f0383d03f60 R15: 00007ffd8c5ba008 --- 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