Hello, syzbot found the following issue on: HEAD commit: fe46a7dd189e Merge tag 'sound-6.9-rc1' of git://git.kernel.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=15c64113180000 kernel config: https://syzkaller.appspot.com/x/.config?x=fe78468a74fdc3b7 dashboard link: https://syzkaller.appspot.com/bug?extid=1acbadd9f48eeeacda29 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=16435913180000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=111600cb180000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/0f7abe4afac7/disk-fe46a7dd.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/82598d09246c/vmlinux-fe46a7dd.xz kernel image: https://storage.googleapis.com/syzbot-assets/efa23788c875/bzImage-fe46a7dd.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+1acbadd9f48eeeacda29@xxxxxxxxxxxxxxxxxxxxxxxxx rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: 0-...!: (1 GPs behind) idle=d3cc/1/0x4000000000000000 softirq=6440/6443 fqs=2 rcu: (detected by 1, t=10506 jiffies, g=7245, q=210 ncpus=2) Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 5367 Comm: syz-executor780 Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 RIP: 0010:lockdep_recursion_finish kernel/locking/lockdep.c:467 [inline] RIP: 0010:lock_release+0x5c0/0x9d0 kernel/locking/lockdep.c:5776 Code: 00 fc ff df 4c 8b 64 24 08 48 8b 5c 24 28 49 89 dd 4c 8d b4 24 90 00 00 00 48 c7 c7 60 d3 aa 8b e8 d5 9c 02 0a b8 ff ff ff ff <65> 0f c1 05 28 c5 90 7e 83 f8 01 0f 85 9a 00 00 00 4c 89 f3 48 c1 RSP: 0000:ffffc90000007720 EFLAGS: 00000082 RAX: 00000000ffffffff RBX: 0000000000000046 RCX: ffffc90000007703 RDX: 0000000000000001 RSI: ffffffff8baad360 RDI: ffffffff8bfed300 RBP: ffffc90000007860 R08: ffffffff8f873a6f R09: 1ffffffff1f0e74d R10: dffffc0000000000 R11: fffffbfff1f0e74e R12: 1ffff92000000ef0 R13: 0000000000000046 R14: ffffc900000077b0 R15: dffffc0000000000 FS: 0000555594caf380(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000600 CR3: 0000000023676000 CR4: 0000000000350ef0 Call Trace: <NMI> </NMI> <IRQ> rcu_lock_release include/linux/rcupdate.h:308 [inline] rcu_read_unlock include/linux/rcupdate.h:783 [inline] advance_sched+0xb37/0xca0 net/sched/sch_taprio.c:987 __run_hrtimer kernel/time/hrtimer.c:1692 [inline] __hrtimer_run_queues+0x597/0xd00 kernel/time/hrtimer.c:1756 hrtimer_interrupt+0x396/0x990 kernel/time/hrtimer.c:1818 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline] __sysvec_apic_timer_interrupt+0x109/0x3a0 arch/x86/kernel/apic/apic.c:1049 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0x52/0xc0 arch/x86/kernel/apic/apic.c:1043 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline] RIP: 0010:_raw_spin_unlock_irq+0x29/0x50 kernel/locking/spinlock.c:202 Code: 90 f3 0f 1e fa 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 0a b4 f2 f5 48 89 df e8 c2 f3 f3 f5 e8 1d 19 1d f6 fb bf 01 00 00 00 <e8> 52 e0 e5 f5 65 8b 05 a3 c4 84 74 85 c0 74 06 5b e9 71 40 00 00 RSP: 0000:ffffc90000007cb0 EFLAGS: 00000282 RAX: 49e89c1a0716e600 RBX: ffff8880b942a740 RCX: ffffffff81720c2a RDX: dffffc0000000000 RSI: ffffffff8baac1e0 RDI: 0000000000000001 RBP: ffffc90000007e10 R08: ffffffff92ce5537 R09: 1ffffffff259caa6 R10: dffffc0000000000 R11: fffffbfff259caa7 R12: ffff8880b942a788 R13: ffffc90000007d60 R14: dffffc0000000000 R15: 00000000ffffdaa5 __run_timer_base+0x1c0/0x8e0 kernel/time/timer.c:2420 run_timer_base kernel/time/timer.c:2428 [inline] run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2438 __do_softirq+0x2be/0x943 kernel/softirq.c:554 invoke_softirq kernel/softirq.c:428 [inline] __irq_exit_rcu+0xf2/0x1c0 kernel/softirq.c:633 irq_exit_rcu+0x9/0x30 kernel/softirq.c:645 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1043 </IRQ> <TASK> asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:srso_safe_ret+0x0/0x20 arch/x86/lib/retpoline.S:208 Code: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc 48 b8 <48> 8d 64 24 08 c3 cc cc 0f ae e8 e8 f0 ff ff ff 0f 0b 66 2e 0f 1f RSP: 0000:ffffc90004907030 EFLAGS: 00000293 RAX: ffffffff814095ec RBX: 0000000000000000 RCX: ffff888028fe0000 RDX: 0000000000000000 RSI: ffffffff8140c1eb RDI: ffffffff8140c035 RBP: 1ffff92000920e30 R08: ffffffff81409480 R09: 0000000000000000 R10: ffffc90004907180 R11: fffff52000920e3c R12: ffffffff8f9755b0 R13: dffffc0000000000 R14: 1ffff92000920e30 R15: ffffffff9008ea3e srso_return_thunk+0x5/0x5f arch/x86/lib/retpoline.S:222 unwind_next_frame+0x67c/0x2a00 arch/x86/kernel/unwind_orc.c:495 __unwind_start+0x641/0x7c0 arch/x86/kernel/unwind_orc.c:760 unwind_start arch/x86/include/asm/unwind.h:64 [inline] arch_stack_walk+0x103/0x1b0 arch/x86/kernel/stacktrace.c:24 stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122 save_stack+0xfb/0x1f0 mm/page_owner.c:129 __set_page_owner+0x29/0x380 mm/page_owner.c:195 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x1ea/0x210 mm/page_alloc.c:1533 prep_new_page mm/page_alloc.c:1540 [inline] get_page_from_freelist+0x33ea/0x3580 mm/page_alloc.c:3311 __alloc_pages+0x256/0x680 mm/page_alloc.c:4569 alloc_pages_mpol+0x3de/0x650 mm/mempolicy.c:2133 pagetable_alloc include/linux/mm.h:2842 [inline] __pud_alloc_one include/asm-generic/pgalloc.h:169 [inline] pud_alloc_one include/asm-generic/pgalloc.h:189 [inline] __pud_alloc+0x93/0x4b0 mm/memory.c:5692 pud_alloc include/linux/mm.h:2799 [inline] __handle_mm_fault+0x4472/0x72d0 mm/memory.c:5236 handle_mm_fault+0x3c2/0x8a0 mm/memory.c:5470 do_user_addr_fault arch/x86/mm/fault.c:1413 [inline] handle_page_fault arch/x86/mm/fault.c:1505 [inline] exc_page_fault+0x2a8/0x890 arch/x86/mm/fault.c:1563 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 RIP: 0033:0x7f37687f9bcc Code: 00 00 e8 67 52 03 00 48 83 f8 ff 74 07 48 89 05 3a 15 0b 00 31 d2 b9 00 06 00 20 bf 10 00 00 00 48 b8 74 65 61 6d 30 00 00 00 <48> 89 04 25 00 06 00 20 31 c0 48 89 14 25 08 06 00 20 48 8b 35 0b RSP: 002b:00007ffc3f74a370 EFLAGS: 00010246 RAX: 000000306d616574 RBX: 0000000000000000 RCX: 0000000020000600 RDX: 0000000000000000 RSI: 0000000800000003 RDI: 0000000000000010 RBP: 00000000000f4240 R08: 0000000000000000 R09: 0000000100000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc3f74a3c0 R13: 000000000003239a R14: 00007ffc3f74a38c R15: 0000000000000003 </TASK> INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 4.146 msecs rcu: rcu_preempt kthread starved for 10495 jiffies! g7245 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior. rcu: RCU grace-period kthread stack dump: task:rcu_preempt state:R running task stack:26256 pid:16 tgid:16 ppid:2 flags:0x00004000 Call Trace: <TASK> context_switch kernel/sched/core.c:5409 [inline] __schedule+0x17d3/0x4a20 kernel/sched/core.c:6736 __schedule_loop kernel/sched/core.c:6813 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6828 schedule_timeout+0x1be/0x310 kernel/time/timer.c:2572 rcu_gp_fqs_loop+0x2df/0x1370 kernel/rcu/tree.c:1663 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:1862 kthread+0x2f2/0x390 kernel/kthread.c:388 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243 </TASK> rcu: Stack dump where RCU GP kthread last ran: CPU: 1 PID: 61 Comm: kworker/u8:4 Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 Workqueue: events_unbound toggle_allocation_gate RIP: 0010:csd_lock_wait kernel/smp.c:311 [inline] RIP: 0010:smp_call_function_many_cond+0x1855/0x2960 kernel/smp.c:855 Code: 89 e6 83 e6 01 31 ff e8 d9 d5 0b 00 41 83 e4 01 49 bc 00 00 00 00 00 fc ff df 75 07 e8 84 d1 0b 00 eb 38 f3 90 42 0f b6 04 23 <84> c0 75 11 41 f7 45 00 01 00 00 00 74 1e e8 68 d1 0b 00 eb e4 44 RSP: 0018:ffffc900015c76e0 EFLAGS: 00000293 RAX: 0000000000000000 RBX: 1ffff11017288c0d RCX: ffff88801aadbc00 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc900015c78e0 R08: ffffffff818923b7 R09: 1ffffffff259caa0 R10: dffffc0000000000 R11: fffffbfff259caa1 R12: dffffc0000000000 R13: ffff8880b9446068 R14: ffff8880b953f480 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555594cafca8 CR3: 000000000df32000 CR4: 0000000000350ef0 Call Trace: <IRQ> </IRQ> <TASK> on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1023 on_each_cpu include/linux/smp.h:71 [inline] text_poke_sync arch/x86/kernel/alternative.c:2086 [inline] text_poke_bp_batch+0x352/0xb30 arch/x86/kernel/alternative.c:2296 text_poke_flush arch/x86/kernel/alternative.c:2487 [inline] text_poke_finish+0x30/0x50 arch/x86/kernel/alternative.c:2494 arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146 static_key_enable_cpuslocked+0x136/0x260 kernel/jump_label.c:205 static_key_enable+0x1a/0x20 kernel/jump_label.c:218 toggle_allocation_gate+0xb5/0x250 mm/kfence/core.c:826 process_one_work kernel/workqueue.c:3254 [inline] process_scheduled_works+0xa02/0x1770 kernel/workqueue.c:3335 worker_thread+0x86d/0xd70 kernel/workqueue.c:3416 kthread+0x2f2/0x390 kernel/kthread.c:388 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243 </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 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. 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
