From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f200.google.com (mail-il1-f200.google.com [209.85.166.200]) (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 D0FC315C13F for ; Fri, 29 Nov 2024 08:55:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.200 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732870530; cv=none; b=G3M6QJt1FTtrowfgu4fEWuopJhA+/mwPmrHbCLTr8Wo/VxIYODUwO6a8sZ3vqWs2lo73amATPVYvLxXoTrdX7JgemlS/NhlHdJjj+iCwc0UJp+kHH1cAWoQa4BXUBEFS+CqRFRmg4djF6RK4pmktbftJFemuaBJbErKx1qGCzNY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732870530; c=relaxed/simple; bh=qM20KHn5jAFgUZLCV2Slj4cu5IQfmkKXuvbqSICjsN0=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=j3vUp8BUcGDysvEj+bYo3vN9qvyElNzspCH5b7bT4544hmVCTnanQF9GxHB5EEYNnDmF5Lnp47w/ngudUiu2oWuf7/HLTl5CcYNcDUxFRl4CXPq4/Ze7YRPDiJ1J1VGEU2yRF+gszS4NHjM7tTW3chFS8SWCcAiHNlnai+mnZ3Q= 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=209.85.166.200 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-f200.google.com with SMTP id e9e14a558f8ab-3a78e952858so14900115ab.3 for ; Fri, 29 Nov 2024 00:55:28 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1732870528; x=1733475328; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=lR+p6NE3/ylb/sNtXOnSWDpXj/jDLqlspCqpCJsrYUs=; b=MTde/jFO/UbBFOmY8TDILS4tq632KzEx/yZLaGaeOE2qNzwGyxPT5/P6kUsIh8Sgeg j0hONkV0eyEVMew1XzkZ5oB0BKgcPXx+RAw/zp85kTZfSsBcHTok+mRABRpWLwFF6wZv JUmE3a9hqcklB/RQb/XNi981m+u4z9qpA1nP/ZvBJDuXGFTyN3Bq6zksopf6HLNeuP1B rvMD/k614xIJ5rL/nXeZHXrZhSXUsV8dSj+la+WGaCwlWPQEW8Aq/uvwTjrP69Ey7GBx 0fwonnMiqhzAaxddPWAhn86GJgF4GPAO+EKt+KGDn6df/KmQuXDH3urIL8d/qS9EaSOy c7NQ== X-Forwarded-Encrypted: i=1; AJvYcCUdds5bZsAYvu5TXamqWkINjDFftsDDr7HPcLSdBTK1dlqwXQBkGm1jNUP0WjnLC2fV2KhWisPSL+MrqTM=@vger.kernel.org X-Gm-Message-State: AOJu0YxoRjs9cAp/TK9I2ZtbOdHrKHP5CzplsnJrd1Qds+a0knFP+dnH qIgJxCaBmPf1B8WYqZaYmISbD95+kbYjskXKobuH6uzgHJLYXRS9kNfnftY9GqaBiyzUbxMxxzk GSbwD+Yg92pl5fr9KHyBkMtpj+eL+eoSdCvqI3kKgnPm7b7qzDLFPmQE= X-Google-Smtp-Source: AGHT+IHPLcB/b9JLed7OoEV9zLx/4zMeKD0hmJ9n6HKfcyCZnnQp2qTsoSXlfpciYJsd/Oys+DOBVQfxG3BTz4+2ITnH/IXZBwZH Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:1a02:b0:3a7:9347:5465 with SMTP id e9e14a558f8ab-3a7c5523826mr116629975ab.3.1732870528021; Fri, 29 Nov 2024 00:55:28 -0800 (PST) Date: Fri, 29 Nov 2024 00:55:28 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6749817f.050a0220.253251.00a8.GAE@google.com> Subject: [syzbot] [net?] BUG: soft lockup in sctp_generate_t1_init_event 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: 28eb75e178d3 Merge tag 'drm-next-2024-11-21' of https://gi.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1576a530580000 kernel config: https://syzkaller.appspot.com/x/.config?x=ba7dd83119eb53b6 dashboard link: https://syzkaller.appspot.com/bug?extid=64802c9d544a016044ac compiler: aarch64-linux-gnu-gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 userspace arch: arm Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/384ffdcca292/non_bootable_disk-28eb75e1.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/4600137dc19a/vmlinux-28eb75e1.xz kernel image: https://storage.googleapis.com/syzbot-assets/307506ce5736/zImage-28eb75e1.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+64802c9d544a016044ac@syzkaller.appspotmail.com watchdog: BUG: soft lockup - CPU#0 stuck for 23s! [kworker/u8:6:779] Modules linked in: irq event stamp: 875487 hardirqs last enabled at (875486): [] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:85 [inline] hardirqs last enabled at (875486): [] exit_to_kernel_mode+0x38/0x118 arch/arm64/kernel/entry-common.c:95 hardirqs last disabled at (875487): [] __el1_irq arch/arm64/kernel/entry-common.c:557 [inline] hardirqs last disabled at (875487): [] el1_interrupt+0x24/0x54 arch/arm64/kernel/entry-common.c:575 softirqs last enabled at (836530): [] spin_unlock_bh include/linux/spinlock.h:396 [inline] softirqs last enabled at (836530): [] nsim_dev_trap_report drivers/net/netdevsim/dev.c:820 [inline] softirqs last enabled at (836530): [] nsim_dev_trap_report_work+0x6c4/0xa9c drivers/net/netdevsim/dev.c:851 softirqs last disabled at (836531): [] __do_softirq+0x14/0x20 kernel/softirq.c:588 CPU: 0 UID: 0 PID: 779 Comm: kworker/u8:6 Not tainted 6.12.0-syzkaller-07749-g28eb75e178d3 #0 Hardware name: linux,dummy-virt (DT) Workqueue: events_unbound nsim_dev_trap_report_work pstate: 10000005 (nzcV daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : __percpu_read_32+0x0/0x58 arch/arm64/include/asm/percpu.h:125 lr : lockdep_enabled kernel/locking/lockdep.c:119 [inline] lr : lock_is_held_type+0x68/0x1b4 kernel/locking/lockdep.c:5914 sp : ffff800080006a60 x29: ffff800080006a60 x28: ffff00001ac99050 x27: 0000000000000003 x26: 00000000ffffffff x25: 1ffff00010000d79 x24: ffff800086c84448 x23: 0000000000000000 x22: ffff800080006bc0 x21: ffff800086ed8960 x20: dfff800000000000 x19: ffff000011d8bf00 x18: 0000000032b43c88 x17: 00000000000080fe x16: 0000000000000000 x15: 1fffe0000273a514 x14: 1ffff000110ce4fc x13: ffff0000139d28c0 x12: ffff700010000d7e x11: 1ffff00010000d7d x10: ffff700010000d7d x9 : dfff800000000000 x8 : ffff800080006bf0 x7 : 0000000000000000 x6 : ffff700010000d78 x5 : ffff800080006bc4 x4 : ffff800080007488 x3 : 1fffe0000273a3c9 x2 : 0000000000000000 x1 : ffff800086c84448 x0 : ffff000069f74448 Call trace: __percpu_read_32+0x0/0x58 arch/arm64/include/asm/percpu.h:47 (P) lockdep_enabled kernel/locking/lockdep.c:119 [inline] (L) lock_is_held_type+0x68/0x1b4 kernel/locking/lockdep.c:5914 (L) lock_is_held include/linux/lockdep.h:249 [inline] rcu_read_lock_held kernel/rcu/update.c:351 [inline] rcu_read_lock_held+0x54/0x70 kernel/rcu/update.c:345 fib6_node_lookup_1+0x284/0x6c4 net/ipv6/ip6_fib.c:1620 fib6_node_lookup+0xc0/0x14c net/ipv6/ip6_fib.c:1649 fib6_table_lookup+0xbc/0x70c net/ipv6/route.c:2191 ip6_pol_route+0x164/0xbcc net/ipv6/route.c:2231 ip6_pol_route_output+0x50/0x7c net/ipv6/route.c:2606 pol_lookup_func include/net/ip6_fib.h:616 [inline] fib6_rule_lookup+0xf8/0x560 net/ipv6/fib6_rules.c:117 ip6_route_output_flags_noref net/ipv6/route.c:2639 [inline] ip6_route_output_flags+0x158/0x4b0 net/ipv6/route.c:2651 ip6_dst_lookup_tail.constprop.0+0xcc8/0x1b68 net/ipv6/ip6_output.c:1156 ip6_dst_lookup_flow+0x90/0x16c net/ipv6/ip6_output.c:1259 sctp_v6_get_dst+0x854/0x144c net/sctp/ipv6.c:384 sctp_transport_route+0xf8/0x2b8 net/sctp/transport.c:455 sctp_packet_config+0x7b8/0xa88 net/sctp/output.c:103 sctp_outq_select_transport+0x16c/0x59c net/sctp/outqueue.c:869 sctp_outq_flush_ctrl net/sctp/outqueue.c:903 [inline] sctp_outq_flush+0x234/0x2540 net/sctp/outqueue.c:1212 sctp_outq_uncork+0x54/0x74 net/sctp/outqueue.c:764 sctp_cmd_interpreter net/sctp/sm_sideeffect.c:1818 [inline] sctp_side_effects net/sctp/sm_sideeffect.c:1198 [inline] sctp_do_sm+0x1604/0x4b70 net/sctp/sm_sideeffect.c:1169 sctp_generate_timeout_event+0x154/0x2c8 net/sctp/sm_sideeffect.c:295 sctp_generate_t1_init_event+0x18/0x24 net/sctp/sm_sideeffect.c:321 call_timer_fn+0x1b0/0x7b4 kernel/time/timer.c:1793 expire_timers kernel/time/timer.c:1844 [inline] __run_timers+0x50c/0x71c kernel/time/timer.c:2418 __run_timer_base kernel/time/timer.c:2430 [inline] __run_timer_base kernel/time/timer.c:2422 [inline] run_timer_base+0x110/0x180 kernel/time/timer.c:2439 run_timer_softirq+0x1c/0x44 kernel/time/timer.c:2449 handle_softirqs+0x2e8/0xd44 kernel/softirq.c:554 __do_softirq+0x14/0x20 kernel/softirq.c:588 ____do_softirq+0x10/0x1c arch/arm64/kernel/irq.c:81 call_on_irq_stack+0x24/0x4c arch/arm64/kernel/entry.S:891 do_softirq_own_stack+0x1c/0x2c arch/arm64/kernel/irq.c:86 do_softirq kernel/softirq.c:455 [inline] do_softirq+0x12c/0x150 kernel/softirq.c:442 __local_bh_enable_ip+0x414/0x4a4 kernel/softirq.c:382 __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:167 [inline] _raw_spin_unlock_bh+0x44/0x54 kernel/locking/spinlock.c:210 spin_unlock_bh include/linux/spinlock.h:396 [inline] nsim_dev_trap_report drivers/net/netdevsim/dev.c:820 [inline] nsim_dev_trap_report_work+0x6c4/0xa9c drivers/net/netdevsim/dev.c:851 process_one_work+0x7b8/0x189c kernel/workqueue.c:3229 process_scheduled_works kernel/workqueue.c:3310 [inline] worker_thread+0x730/0xb74 kernel/workqueue.c:3391 kthread+0x27c/0x300 kernel/kthread.c:389 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:862 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 5489 Comm: syz.2.701 Not tainted 6.12.0-syzkaller-07749-g28eb75e178d3 #0 Hardware name: linux,dummy-virt (DT) pstate: 20000010 (nzCv q A32 LE aif -DIT -SSBS) pc : 0000000000018b8c lr : 0000000000018b8c sp : 0000000020000370 x12: 0000000020000370 x11: 00000000f76b10bc x10: 00000000003d0f00 x9 : 0000000000006364 x8 : 0000000000000000 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000000 x2 : 00000000000001e4 x1 : 0000000000000004 x0 : 00000000ffffffff --- 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