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Mon, 09 Sep 2024 13:48:28 -0700 (PDT) Date: Mon, 09 Sep 2024 13:48:28 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000000189dc0621b5e193@google.com> Subject: [syzbot] [mm?] INFO: rcu detected stall in x64_sys_call From: syzbot To: andrii@kernel.org, ast@kernel.org, bpf@vger.kernel.org, daniel@iogearbox.net, eddyz87@gmail.com, haoluo@google.com, john.fastabend@gmail.com, jolsa@kernel.org, kpsingh@kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, martin.lau@linux.dev, sdf@fomichev.me, song@kernel.org, syzkaller-bugs@googlegroups.com, yonghong.song@linux.dev Content-Type: text/plain; charset="UTF-8" X-Rspamd-Queue-Id: 046DF40009 X-Stat-Signature: c985ftajsn75dkfwtzs7bkpqoxantock X-Rspamd-Server: rspam09 X-Rspam-User: X-HE-Tag: 1725914908-590546 X-HE-Meta: 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 DP790ia9 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 0zcQHBXI 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Hello, syzbot found the following issue on: HEAD commit: 89f5e14d05b4 Merge tag 'timers_urgent_for_v6.11_rc7' of gi.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=161dc807980000 kernel config: https://syzkaller.appspot.com/x/.config?x=fc7fa3453562e8b dashboard link: https://syzkaller.appspot.com/bug?extid=65203730e781d98f23a0 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/32d5513fda9e/disk-89f5e14d.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/a58c26d03524/vmlinux-89f5e14d.xz kernel image: https://storage.googleapis.com/syzbot-assets/efa23a51ded0/bzImage-89f5e14d.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+65203730e781d98f23a0@syzkaller.appspotmail.com bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P1072/1:b..l P6746/2:b..l rcu: (detected by 0, t=10502 jiffies, g=26081, q=1102 ncpus=2) task:syz.0.260 state:R running task stack:24672 pid:6746 tgid:6746 ppid:6370 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:5188 [inline] __schedule+0x17ae/0x4a10 kernel/sched/core.c:6529 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:6851 irqentry_exit+0x5e/0x90 kernel/entry/common.c:354 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:trace_lock_release include/trace/events/lock.h:69 [inline] RIP: 0010:lock_release+0xb8/0xa30 kernel/locking/lockdep.c:5770 Code: 08 0f 83 fe 05 00 00 89 c3 48 89 d8 48 c1 e8 06 48 8d 3c c5 e8 4a f7 8f be 08 00 00 00 e8 80 be 87 00 48 0f a3 1d 50 57 87 0e <73> 16 e8 f1 ce 09 00 84 c0 75 0d 80 3d 11 2a 71 0e 00 0f 84 fc 05 RSP: 0018:ffffc90004216ba0 EFLAGS: 00000257 RAX: 0000000000000001 RBX: 0000000000000001 RCX: ffffffff816ff390 RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8ff74ae8 RBP: ffffc90004216cd0 R08: ffffffff8ff74aef R09: 1ffffffff1fee95d R10: dffffc0000000000 R11: fffffbfff1fee95e R12: 1ffff92000842d80 R13: ffffffff81a23d46 R14: 0000000000000000 R15: dffffc0000000000 rcu_lock_release include/linux/rcupdate.h:336 [inline] rcu_read_unlock include/linux/rcupdate.h:869 [inline] is_bpf_text_address+0x280/0x2a0 kernel/bpf/core.c:769 kernel_text_address+0xa7/0xe0 kernel/extable.c:125 __kernel_text_address+0xd/0x40 kernel/extable.c:79 unwind_get_return_address+0x5d/0xc0 arch/x86/kernel/unwind_orc.c:369 arch_stack_walk+0x125/0x1b0 arch/x86/kernel/stacktrace.c:26 stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122 save_stack+0xfb/0x1f0 mm/page_owner.c:156 __reset_page_owner+0x76/0x430 mm/page_owner.c:297 reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1101 [inline] free_unref_folios+0x100f/0x1ac0 mm/page_alloc.c:2667 folios_put_refs+0x76e/0x860 mm/swap.c:1039 free_pages_and_swap_cache+0x2ea/0x690 mm/swap_state.c:332 __tlb_batch_free_encoded_pages mm/mmu_gather.c:136 [inline] tlb_batch_pages_flush mm/mmu_gather.c:149 [inline] tlb_flush_mmu_free mm/mmu_gather.c:366 [inline] tlb_flush_mmu+0x3a3/0x680 mm/mmu_gather.c:373 zap_pte_range mm/memory.c:1697 [inline] zap_pmd_range mm/memory.c:1736 [inline] zap_pud_range mm/memory.c:1765 [inline] zap_p4d_range mm/memory.c:1786 [inline] unmap_page_range+0x38d9/0x42c0 mm/memory.c:1807 unmap_vmas+0x3cc/0x5f0 mm/memory.c:1897 exit_mmap+0x264/0xc80 mm/mmap.c:3412 __mmput+0x115/0x380 kernel/fork.c:1345 exit_mm+0x220/0x310 kernel/exit.c:571 do_exit+0x9b2/0x27f0 kernel/exit.c:869 do_group_exit+0x207/0x2c0 kernel/exit.c:1031 __do_sys_exit_group kernel/exit.c:1042 [inline] __se_sys_exit_group kernel/exit.c:1040 [inline] __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1040 x64_sys_call+0x2634/0x2640 arch/x86/include/generated/asm/syscalls_64.h:232 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: 0033:0x7fd22ad7cef9 RSP: 002b:00007ffcbce70338 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fd22ad7cef9 RDX: 0000000000000064 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00007ffcbce7038c R08: 00007ffcbce7041f R09: 0000000000057a2a R10: 0000000000000006 R11: 0000000000000246 R12: 0000000000000032 R13: 0000000000057a2a R14: 00000000000579f3 R15: 00007ffcbce703e0 task:kworker/u8:7 state:R running task stack:21008 pid:1072 tgid:1072 ppid:2 flags:0x00004000 Workqueue: writeback wb_workfn (flush-8:0) Call Trace: context_switch kernel/sched/core.c:5188 [inline] __schedule+0x17ae/0x4a10 kernel/sched/core.c:6529 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:6851 irqentry_exit+0x5e/0x90 kernel/entry/common.c:354 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:__kernel_text_address+0x5/0x40 kernel/extable.c:78 Code: c3 48 c7 c7 40 08 f7 8f e8 08 19 98 00 eb b5 66 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 66 0f 1f 00 53 <48> 89 fb e8 43 00 00 00 85 c0 0f 95 c0 48 c7 c1 00 40 53 91 48 39 RSP: 0018:ffffc900042d65a8 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffffc900042d6628 RCX: ffff888027a00000 RDX: ffff888027a00000 RSI: 0000000000000001 RDI: ffffffff8260b639 RBP: 0000000000000001 R08: ffffffff814125c7 R09: ffffffff814140bf R10: 0000000000000003 R11: ffff888027a00000 R12: ffff888027a00000 R13: ffffffff817f2f30 R14: dffffc0000000000 R15: 1ffff9200085acc5 unwind_get_return_address+0x5d/0xc0 arch/x86/kernel/unwind_orc.c:369 arch_stack_walk+0x125/0x1b0 arch/x86/kernel/stacktrace.c:26 stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122 save_stack+0xfb/0x1f0 mm/page_owner.c:156 __reset_page_owner+0x76/0x430 mm/page_owner.c:297 reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1101 [inline] free_unref_page+0xd19/0xea0 mm/page_alloc.c:2619 __slab_free+0x31b/0x3d0 mm/slub.c:4388 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x9e/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:322 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slub.c:3992 [inline] slab_alloc_node mm/slub.c:4041 [inline] kmem_cache_alloc_noprof+0x135/0x2a0 mm/slub.c:4048 ext4_init_io_end+0x29/0x130 fs/ext4/page-io.c:277 ext4_do_writepages+0xc13/0x3d40 fs/ext4/inode.c:2701 ext4_writepages+0x213/0x3c0 fs/ext4/inode.c:2842 do_writepages+0x35d/0x870 mm/page-writeback.c:2683 __writeback_single_inode+0x165/0x10b0 fs/fs-writeback.c:1651 writeback_sb_inodes+0x99c/0x1380 fs/fs-writeback.c:1947 __writeback_inodes_wb+0x11b/0x260 fs/fs-writeback.c:2018 wb_writeback+0x495/0xd40 fs/fs-writeback.c:2129 wb_check_old_data_flush fs/fs-writeback.c:2233 [inline] wb_do_writeback fs/fs-writeback.c:2286 [inline] wb_workfn+0xba1/0x1090 fs/fs-writeback.c:2314 process_one_work kernel/workqueue.c:3231 [inline] process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3312 worker_thread+0x86d/0xd10 kernel/workqueue.c:3389 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 rcu: rcu_preempt kthread starved for 9599 jiffies! g26081 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:25816 pid:17 tgid:17 ppid:2 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:5188 [inline] __schedule+0x17ae/0x4a10 kernel/sched/core.c:6529 __schedule_loop kernel/sched/core.c:6606 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6621 schedule_timeout+0x1be/0x310 kernel/time/timer.c:2581 rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2034 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2236 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 rcu: Stack dump where RCU GP kthread last ran: Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline] NMI backtrace for cpu 1 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:106 [inline] NMI backtrace for cpu 1 skipped: idling at acpi_safe_halt+0x21/0x30 drivers/acpi/processor_idle.c:111 net_ratelimit: 16634 callbacks suppressed bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:32:a6:3d:0b:9e:62, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:32:a6:3d:0b:9e:62, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0) bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0) bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) net_ratelimit: 18130 callbacks suppressed bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:32:a6:3d:0b:9e:62, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:32:a6:3d:0b:9e:62, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:32:a6:3d:0b:9e:62, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0) bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) --- This report is generated by a bot. 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