From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-io1-f71.google.com (mail-io1-f71.google.com [209.85.166.71]) (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 95DF718EA2 for ; Tue, 5 Nov 2024 01:19:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.71 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730769567; cv=none; b=r34EzkCsoo3/raQvv1iYtqq06GXZUCsOngR7zmjCOr6ee/AcWYouhanvnmuy8+FvS+6qlORq91e2XhS6YmCndpRAy0Np2XHDMPwUh68i4RmmgEGIgeJ8tlNRFee/ul24qeas97PyiOh1TiTlNiM9iPQhza5N/RGivgYLYUATRtQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730769567; c=relaxed/simple; bh=5cDGxqb5PL2dnXfhthFkjbB0NA18TlNyE/JRzzme2zg=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=LWnyRQ2IDKYPqESumYR/iMFBG6wfsYmsGMkwkBbcsDdoBcG4jAN36mjgXxDDTn85LP3ASkaJ9ed44s3Sm9EL9YYXBAWi1ltpxQBooqtS0y8kf5HOlqPIp2EqBo/dHHP9Ott+OEgmv5q7JJk7SO2GT0z5Jmns4v/ViTHSvUhzlx8= 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=209.85.166.71 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-f71.google.com with SMTP id ca18e2360f4ac-83adc5130e3so471182239f.0 for ; Mon, 04 Nov 2024 17:19:25 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1730769565; x=1731374365; h=to:from:subject:message-id:in-reply-to:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=hM4FdiCO1/FkeuPlUpxbqHon8yx/aa1NcneBzFYuH6g=; b=k0TxPjDH1o87z8qsPvSW8LQh0flGAWQkUr7emz01vMXDQJlmbSR/J1tLfBMBDB0Okg nSWPn1oZ1Pv3ewov5Al67OyyLl2O7FHjo1ISFHeWPSmudpl3ZeXHg1H4akLua6xT23BF PVyyO0GDjfIfNl8cqrsmpmFCYeKVgbABeCHwTBi1+saTUoWt8+LkcVD0gN+d/ACOzeeJ AIiv9e06kL3GKrhKtUQSPWdaegSQAPxodZEQqNiCyNmilDY9w35vtOzHnnU3YA4SYW5w WnpikOMiL9MLQrvOIu4Bfxq4mzlZYgl1qzaued6WuMFFb7hikcSOFnQi7kb+qMV0tSSS wiBA== X-Forwarded-Encrypted: i=1; AJvYcCV3NAf9J3l8+RTcu/i82mYCq93Fg/gmGf5da1wtqKazlFLlqpvxXntaC+Jx10xvmirzjifpZMQ=@vger.kernel.org X-Gm-Message-State: AOJu0YxM/ZZaFo66up9oftLeq10yVDo6bgYf0xwIj/FJfeiRQynhHEYQ pvhuQBVHagXTqtLGddD0iG+ptkw8oD7klo9MDVcHKTZ7MoUeM00sHysXsmdQdSMrtcodr/KUTCV FCd0MdHuxmBFJ6jUr7D7VTTwadofhlFF6CVlR66tzQvFsr5UdGbnDjps= X-Google-Smtp-Source: AGHT+IGTchSHQS+dhxI+dsdTyQ58bL2OulPkVjhT/qAzyAbHdPEYA7BpswuV+A2bCbdY6BWjgATbxYRp+6o5xgFqX08H+LKQWjGD Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:1e09:b0:3a4:eccc:aa5c with SMTP id e9e14a558f8ab-3a609a2afbfmr180266535ab.5.1730769564742; Mon, 04 Nov 2024 17:19:24 -0800 (PST) Date: Mon, 04 Nov 2024 17:19:24 -0800 In-Reply-To: <6706d42c.050a0220.1139e6.000b.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6729729c.050a0220.701a.0012.GAE@google.com> Subject: Re: [syzbot] [nfs?] INFO: task hung in nfsd_nl_threads_set_doit From: syzbot To: Dai.Ngo@oracle.com, anna@kernel.org, chuck.lever@oracle.com, dai.ngo@oracle.com, davem@davemloft.net, edumazet@google.com, jlayton@kernel.org, kuba@kernel.org, linux-kernel@vger.kernel.org, linux-nfs@vger.kernel.org, neilb@suse.de, netdev@vger.kernel.org, okorniev@redhat.com, pabeni@redhat.com, syzkaller-bugs@googlegroups.com, tom@talpey.com, trondmy@kernel.org Content-Type: text/plain; charset="UTF-8" syzbot has found a reproducer for the following issue on: HEAD commit: 5ccdcdf186ae net: xilinx: axienet: Enqueue Tx packets in d.. git tree: net console+strace: https://syzkaller.appspot.com/x/log.txt?x=10bd6587980000 kernel config: https://syzkaller.appspot.com/x/.config?x=672325e7ab17fdf7 dashboard link: https://syzkaller.appspot.com/bug?extid=e7baeb70aa00c22ed45e compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=13526d5f980000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1654a740580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/61afb2d2686a/disk-5ccdcdf1.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/4d4a40c7af1b/vmlinux-5ccdcdf1.xz kernel image: https://storage.googleapis.com/syzbot-assets/178187e5e136/bzImage-5ccdcdf1.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+e7baeb70aa00c22ed45e@syzkaller.appspotmail.com INFO: task syz-executor112:5858 blocked for more than 143 seconds. Not tainted 6.12.0-rc5-syzkaller-00184-g5ccdcdf186ae #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor112 state:D stack:24432 pid:5858 tgid:5858 ppid:5856 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5328 [inline] __schedule+0x18af/0x4bd0 kernel/sched/core.c:6690 __schedule_loop kernel/sched/core.c:6767 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6782 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6839 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a7/0xd70 kernel/locking/mutex.c:752 nfsd_nl_threads_set_doit+0x2bb/0x980 fs/nfsd/nfsctl.c:1671 genl_family_rcv_msg_doit net/netlink/genetlink.c:1115 [inline] genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline] genl_rcv_msg+0xb14/0xec0 net/netlink/genetlink.c:1210 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2551 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline] netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1357 netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1901 sock_sendmsg_nosec net/socket.c:729 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:744 ____sys_sendmsg+0x52a/0x7e0 net/socket.c:2607 ___sys_sendmsg net/socket.c:2661 [inline] __sys_sendmsg+0x292/0x380 net/socket.c:2690 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: 0033:0x7f7003248da9 RSP: 002b:00007fff732a9b58 EFLAGS: 00000206 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f7003248da9 RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000000000005 RBP: 00000000000f4240 R08: 00000000000000a0 R09: 00000000000000a0 R10: 00000000000000a0 R11: 0000000000000206 R12: 0000000000000001 R13: 00007fff732a9d78 R14: 00007fff732a9b80 R15: 00007fff732a9b70 INFO: task syz-executor112:5860 blocked for more than 143 seconds. Not tainted 6.12.0-rc5-syzkaller-00184-g5ccdcdf186ae #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor112 state:D stack:26528 pid:5860 tgid:5860 ppid:5857 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5328 [inline] __schedule+0x18af/0x4bd0 kernel/sched/core.c:6690 __schedule_loop kernel/sched/core.c:6767 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6782 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6839 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a7/0xd70 kernel/locking/mutex.c:752 nfsd_nl_threads_set_doit+0x2bb/0x980 fs/nfsd/nfsctl.c:1671 genl_family_rcv_msg_doit net/netlink/genetlink.c:1115 [inline] genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline] genl_rcv_msg+0xb14/0xec0 net/netlink/genetlink.c:1210 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2551 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline] netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1357 netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1901 sock_sendmsg_nosec net/socket.c:729 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:744 ____sys_sendmsg+0x52a/0x7e0 net/socket.c:2607 ___sys_sendmsg net/socket.c:2661 [inline] __sys_sendmsg+0x292/0x380 net/socket.c:2690 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: 0033:0x7f7003248da9 RSP: 002b:00007fff732a9b58 EFLAGS: 00000206 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f7003248da9 RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000000000005 RBP: 00000000000f4240 R08: 00000000000000a0 R09: 00000000000000a0 R10: 00000000000000a0 R11: 0000000000000206 R12: 0000000000000001 R13: 00007fff732a9d78 R14: 00007fff732a9b80 R15: 00007fff732a9b70 INFO: task syz-executor112:5862 blocked for more than 144 seconds. Not tainted 6.12.0-rc5-syzkaller-00184-g5ccdcdf186ae #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor112 state:D stack:26776 pid:5862 tgid:5862 ppid:5859 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5328 [inline] __schedule+0x18af/0x4bd0 kernel/sched/core.c:6690 __schedule_loop kernel/sched/core.c:6767 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6782 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6839 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a7/0xd70 kernel/locking/mutex.c:752 nfsd_nl_threads_set_doit+0x2bb/0x980 fs/nfsd/nfsctl.c:1671 genl_family_rcv_msg_doit net/netlink/genetlink.c:1115 [inline] genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline] genl_rcv_msg+0xb14/0xec0 net/netlink/genetlink.c:1210 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2551 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline] netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1357 netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1901 sock_sendmsg_nosec net/socket.c:729 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:744 ____sys_sendmsg+0x52a/0x7e0 net/socket.c:2607 ___sys_sendmsg net/socket.c:2661 [inline] __sys_sendmsg+0x292/0x380 net/socket.c:2690 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: 0033:0x7f7003248da9 RSP: 002b:00007fff732a9b58 EFLAGS: 00000206 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f7003248da9 RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000000000005 RBP: 00000000000f4240 R08: 00000000000000a0 R09: 00000000000000a0 R10: 00000000000000a0 R11: 0000000000000206 R12: 0000000000000001 R13: 00007fff732a9d78 R14: 00007fff732a9b80 R15: 00007fff732a9b70 INFO: task syz-executor112:5865 blocked for more than 144 seconds. Not tainted 6.12.0-rc5-syzkaller-00184-g5ccdcdf186ae #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor112 state:D stack:26776 pid:5865 tgid:5865 ppid:5863 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5328 [inline] __schedule+0x18af/0x4bd0 kernel/sched/core.c:6690 __schedule_loop kernel/sched/core.c:6767 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6782 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6839 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a7/0xd70 kernel/locking/mutex.c:752 nfsd_nl_threads_set_doit+0x2bb/0x980 fs/nfsd/nfsctl.c:1671 genl_family_rcv_msg_doit net/netlink/genetlink.c:1115 [inline] genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline] genl_rcv_msg+0xb14/0xec0 net/netlink/genetlink.c:1210 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2551 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline] netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1357 netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1901 sock_sendmsg_nosec net/socket.c:729 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:744 ____sys_sendmsg+0x52a/0x7e0 net/socket.c:2607 ___sys_sendmsg net/socket.c:2661 [inline] __sys_sendmsg+0x292/0x380 net/socket.c:2690 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: 0033:0x7f7003248da9 RSP: 002b:00007fff732a9b58 EFLAGS: 00000206 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f7003248da9 RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000000000005 RBP: 00000000000f4240 R08: 00000000000000a0 R09: 00000000000000a0 R10: 00000000000000a0 R11: 0000000000000206 R12: 0000000000000001 R13: 00007fff732a9d78 R14: 00007fff732a9b80 R15: 00007fff732a9b70 Showing all locks held in the system: 6 locks held by kworker/u8:0/11: 1 lock held by khungtaskd/30: #0: ffffffff8e937da0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] #0: ffffffff8e937da0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #0: ffffffff8e937da0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6720 2 locks held by getty/5593: #0: ffff88814d8630a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211 2 locks held by syz-executor112/5858: #0: ffffffff8fd39210 (cb_lock){++++}-{3:3}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1218 #1: ffffffff8ec19288 (nfsd_mutex){+.+.}-{3:3}, at: nfsd_nl_threads_set_doit+0x2bb/0x980 fs/nfsd/nfsctl.c:1671 2 locks held by syz-executor112/5860: #0: ffffffff8fd39210 (cb_lock){++++}-{3:3}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1218 #1: ffffffff8ec19288 (nfsd_mutex){+.+.}-{3:3}, at: nfsd_nl_threads_set_doit+0x2bb/0x980 fs/nfsd/nfsctl.c:1671 2 locks held by syz-executor112/5862: #0: ffffffff8fd39210 (cb_lock){++++}-{3:3}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1218 #1: ffffffff8ec19288 (nfsd_mutex){+.+.}-{3:3}, at: nfsd_nl_threads_set_doit+0x2bb/0x980 fs/nfsd/nfsctl.c:1671 2 locks held by syz-executor112/5864: #0: ffffffff8fd39210 (cb_lock){++++}-{3:3}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1218 #1: ffffffff8ec19288 (nfsd_mutex){+.+.}-{3:3}, at: nfsd_nl_threads_set_doit+0x2bb/0x980 fs/nfsd/nfsctl.c:1671 2 locks held by syz-executor112/5865: #0: ffffffff8fd39210 (cb_lock){++++}-{3:3}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1218 #1: ffffffff8ec19288 (nfsd_mutex){+.+.}-{3:3}, at: nfsd_nl_threads_set_doit+0x2bb/0x980 fs/nfsd/nfsctl.c:1671 ============================================= NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-rc5-syzkaller-00184-g5ccdcdf186ae #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline] watchdog+0xff4/0x1040 kernel/hung_task.c:379 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline] NMI backtrace for cpu 0 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:106 [inline] NMI backtrace for cpu 0 skipped: idling at acpi_safe_halt+0x21/0x30 drivers/acpi/processor_idle.c:111 --- If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing.