Hello, syzbot found the following issue on: HEAD commit: b86545e02e8c Merge tag 'acpi-6.13-rc1-2' of git://git.kern.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=12cd4f78580000 kernel config: https://syzkaller.appspot.com/x/.config?x=f8e5d0648de624aa dashboard link: https://syzkaller.appspot.com/bug?extid=53e660acb94e444b9d63 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/7afd648f7c25/disk-b86545e0.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/40e3ee6c8cc8/vmlinux-b86545e0.xz kernel image: https://storage.googleapis.com/syzbot-assets/53bc5977cfb0/bzImage-b86545e0.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+53e660acb94e444b9d63@xxxxxxxxxxxxxxxxxxxxxxxxx rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: 1-...0: (6 ticks this GP) idle=545c/1/0x4000000000000000 softirq=161841/161847 fqs=2100 rcu: hardirqs softirqs csw/system rcu: number: 0 0 0 rcu: cputime: 0 0 0 ==> 52500(ms) rcu: (detected by 0, t=10505 jiffies, g=202837, q=172 ncpus=2) Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 1553 Comm: syz.8.7708 Not tainted 6.12.0-syzkaller-10553-gb86545e02e8c #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 RIP: 0010:advance_sched+0x36/0xca0 net/sched/sch_taprio.c:916 Code: 54 53 48 81 ec 98 00 00 00 49 89 fe 48 bd 00 00 00 00 00 fc ff df e8 79 e7 c8 f7 49 8d 5e 88 48 89 d8 48 c1 e8 03 80 3c 28 00 <74> 08 48 89 df e8 50 a3 30 f8 48 8b 03 48 89 84 24 88 00 00 00 48 RSP: 0018:ffffc90000a18c70 EFLAGS: 00000046 RAX: 1ffff1100c0f9259 RBX: ffff8880607c92c8 RCX: ffff88802d349e00 RDX: 0000000000010000 RSI: 0000000000000000 RDI: ffff8880607c9340 RBP: dffffc0000000000 R08: ffffffff8183463f R09: 1ffffffff203a606 R10: dffffc0000000000 R11: ffffffff89ccfc90 R12: dffffc0000000000 R13: ffffffff89ccfc90 R14: ffff8880607c9340 R15: ffff88802d34a8c8 FS: 00007f7bb35f66c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c32f64a CR3: 0000000070470000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <NMI> </NMI> <IRQ> __run_hrtimer kernel/time/hrtimer.c:1739 [inline] __hrtimer_run_queues+0x59b/0xd50 kernel/time/hrtimer.c:1803 hrtimer_interrupt+0x403/0xa40 kernel/time/hrtimer.c:1865 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline] __sysvec_apic_timer_interrupt+0x110/0x420 arch/x86/kernel/apic/apic.c:1055 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline] sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1049 </IRQ> <TASK> asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:finish_task_switch+0x1ea/0x870 kernel/sched/core.c:5243 Code: c9 50 e8 79 07 0c 00 48 83 c4 08 4c 89 f7 e8 9d 39 00 00 e9 de 04 00 00 4c 89 f7 e8 70 2f 6f 0a e8 2b 9a 38 00 fb 48 8b 5d c0 <48> 8d bb f8 15 00 00 48 89 f8 48 c1 e8 03 49 be 00 00 00 00 00 fc RSP: 0018:ffffc900033771a8 EFLAGS: 00000286 RAX: a5530211a14c0a00 RBX: ffff88802d349e00 RCX: ffffffff9a3f7903 RDX: dffffc0000000000 RSI: ffffffff8c0ad980 RDI: ffffffff8c6083a0 RBP: ffffc900033771f0 R08: ffffffff901d3037 R09: 1ffffffff203a606 R10: dffffc0000000000 R11: fffffbfff203a607 R12: 1ffff110170e7eac R13: dffffc0000000000 R14: ffff8880b863e740 R15: ffff8880b873f560 context_switch kernel/sched/core.c:5372 [inline] __schedule+0x1803/0x4be0 kernel/sched/core.c:6756 __schedule_loop kernel/sched/core.c:6833 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6848 schedule_timeout+0xb0/0x290 kernel/time/sleep_timeout.c:75 unix_wait_for_peer+0x250/0x340 net/unix/af_unix.c:1529 unix_dgram_sendmsg+0x127f/0x1f80 net/unix/af_unix.c:2131 sock_sendmsg_nosec net/socket.c:711 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:726 ____sys_sendmsg+0x52a/0x7e0 net/socket.c:2583 ___sys_sendmsg net/socket.c:2637 [inline] __sys_sendmmsg+0x36a/0x720 net/socket.c:2726 __do_sys_sendmmsg net/socket.c:2753 [inline] __se_sys_sendmmsg net/socket.c:2750 [inline] __x64_sys_sendmmsg+0xa0/0xb0 net/socket.c:2750 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: 0033:0x7f7bb5780809 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:00007f7bb35f6058 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 00007f7bb5945fa0 RCX: 00007f7bb5780809 RDX: 0000000000000651 RSI: 0000000020000000 RDI: 0000000000000007 RBP: 00007f7bb57f393e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f7bb5945fa0 R15: 00007ffe8b8d0818 </TASK> --- 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@xxxxxxxxxxxxxxxx. 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
