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List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6602:154e:b0:7d0:36bb:6499 with SMTP id h14-20020a056602154e00b007d036bb6499mr257423iow.2.1711322062765; Sun, 24 Mar 2024 16:14:22 -0700 (PDT) Date: Sun, 24 Mar 2024 16:14:22 -0700 In-Reply-To: <000000000000ef958c060cc9cc3d@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000a5d0a30614703740@google.com> Subject: Re: [syzbot] [net?] WARNING in call_rcu (3) From: syzbot To: davem@davemloft.net, edumazet@google.com, jhs@mojatatu.com, jiri@resnulli.us, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, pabeni@redhat.com, syzkaller-bugs@googlegroups.com, vinicius.gomes@intel.com, xiyou.wangcong@gmail.com Content-Type: text/plain; charset="UTF-8" syzbot has found a reproducer for the following issue on: HEAD commit: 707081b61156 Merge branch 'for-next/core', remote-tracking.. git tree: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci console output: https://syzkaller.appspot.com/x/log.txt?x=141d023a180000 kernel config: https://syzkaller.appspot.com/x/.config?x=caeac3f3565b057a dashboard link: https://syzkaller.appspot.com/bug?extid=d17177af4afd8c6f804c compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 userspace arch: arm64 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=107d3aa5180000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10611291180000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/6cad68bf7532/disk-707081b6.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/1a27e5400778/vmlinux-707081b6.xz kernel image: https://storage.googleapis.com/syzbot-assets/67dfc53755d0/Image-707081b6.gz.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+d17177af4afd8c6f804c@syzkaller.appspotmail.com ------------[ cut here ]------------ ODEBUG: activate active (active state 1) object: 000000007c840c9e object type: rcu_head hint: 0x0 WARNING: CPU: 0 PID: 0 at lib/debugobjects.c:517 debug_print_object lib/debugobjects.c:514 [inline] WARNING: CPU: 0 PID: 0 at lib/debugobjects.c:517 debug_object_activate+0x360/0x4ac lib/debugobjects.c:732 Modules linked in: CPU: 0 PID: 0 Comm: swapper/0 Not tainted 6.8.0-rc7-syzkaller-g707081b61156 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024 pstate: 604000c5 (nZCv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : debug_print_object lib/debugobjects.c:514 [inline] pc : debug_object_activate+0x360/0x4ac lib/debugobjects.c:732 lr : debug_print_object lib/debugobjects.c:514 [inline] lr : debug_object_activate+0x360/0x4ac lib/debugobjects.c:732 sp : ffff800080007ad0 x29: ffff800080007ad0 x28: ffff800093738000 x27: dfff800000000000 x26: ffff80008aef0200 x25: 0000000000000001 x24: ffff0000d010cd00 x23: 0000000000000003 x22: ffff80008b41a2e0 x21: 0000000000000000 x20: ffff80008aef0200 x19: ffff0000d010cd00 x18: ffff800080006fa0 x17: 3963303438633730 x16: ffff80008ad6b09c x15: 0000000000000001 x14: 1fffe00036800002 x13: 0000000000000000 x12: 0000000000000000 x11: 0000000000010004 x10: 0000000000ff0100 x9 : 42aaeb85fb1b0600 x8 : 42aaeb85fb1b0600 x7 : 0000000000000001 x6 : 0000000000000001 x5 : ffff8000800073b8 x4 : ffff80008ed822c0 x3 : ffff8000805ba130 x2 : 0000000000000001 x1 : 0000000100010002 x0 : 0000000000000000 Call trace: debug_print_object lib/debugobjects.c:514 [inline] debug_object_activate+0x360/0x4ac lib/debugobjects.c:732 debug_rcu_head_queue kernel/rcu/rcu.h:227 [inline] __call_rcu_common kernel/rcu/tree.c:2700 [inline] call_rcu+0x48/0xaf4 kernel/rcu/tree.c:2829 switch_schedules net/sched/sch_taprio.c:210 [inline] advance_sched+0x7e0/0xac0 net/sched/sch_taprio.c:984 __run_hrtimer kernel/time/hrtimer.c:1689 [inline] __hrtimer_run_queues+0x484/0xca0 kernel/time/hrtimer.c:1753 hrtimer_interrupt+0x2c0/0xb64 kernel/time/hrtimer.c:1815 timer_handler drivers/clocksource/arm_arch_timer.c:674 [inline] arch_timer_handler_virt+0x74/0x88 drivers/clocksource/arm_arch_timer.c:685 handle_percpu_devid_irq+0x2a4/0x804 kernel/irq/chip.c:942 generic_handle_irq_desc include/linux/irqdesc.h:161 [inline] handle_irq_desc kernel/irq/irqdesc.c:672 [inline] generic_handle_domain_irq+0x7c/0xc4 kernel/irq/irqdesc.c:728 __gic_handle_irq drivers/irqchip/irq-gic-v3.c:782 [inline] __gic_handle_irq_from_irqson drivers/irqchip/irq-gic-v3.c:833 [inline] gic_handle_irq+0x6c/0x190 drivers/irqchip/irq-gic-v3.c:877 call_on_irq_stack+0x24/0x4c arch/arm64/kernel/entry.S:889 do_interrupt_handler+0xd4/0x138 arch/arm64/kernel/entry-common.c:310 __el1_irq arch/arm64/kernel/entry-common.c:536 [inline] el1_interrupt+0x34/0x68 arch/arm64/kernel/entry-common.c:551 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:556 el1h_64_irq+0x64/0x68 arch/arm64/kernel/entry.S:594 __daif_local_irq_enable arch/arm64/include/asm/irqflags.h:27 [inline] arch_local_irq_enable+0x8/0xc arch/arm64/include/asm/irqflags.h:49 cpuidle_idle_call kernel/sched/idle.c:170 [inline] do_idle+0x1f0/0x4e8 kernel/sched/idle.c:312 cpu_startup_entry+0x5c/0x74 kernel/sched/idle.c:410 rest_init+0x2dc/0x2f4 init/main.c:730 start_kernel+0x0/0x4ec init/main.c:827 start_kernel+0x3ec/0x4ec init/main.c:1072 __primary_switched+0x84/0x8c arch/arm64/kernel/head.S:243 irq event stamp: 700776 hardirqs last enabled at (700775): [] default_idle_call+0xf4/0x128 kernel/sched/idle.c:103 hardirqs last disabled at (700776): [] __el1_irq arch/arm64/kernel/entry-common.c:533 [inline] hardirqs last disabled at (700776): [] el1_interrupt+0x24/0x68 arch/arm64/kernel/entry-common.c:551 softirqs last enabled at (700464): [] softirq_handle_end kernel/softirq.c:399 [inline] softirqs last enabled at (700464): [] __do_softirq+0xac8/0xce4 kernel/softirq.c:582 softirqs last disabled at (700459): [] ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:81 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ ODEBUG: active_state active (active state 1) object: 000000007c840c9e object type: rcu_head hint: 0x0 WARNING: CPU: 0 PID: 0 at lib/debugobjects.c:517 debug_print_object lib/debugobjects.c:514 [inline] WARNING: CPU: 0 PID: 0 at lib/debugobjects.c:517 debug_object_active_state+0x2a8/0x37c lib/debugobjects.c:954 Modules linked in: CPU: 0 PID: 0 Comm: swapper/0 Tainted: G W 6.8.0-rc7-syzkaller-g707081b61156 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024 pstate: 604000c5 (nZCv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : debug_print_object lib/debugobjects.c:514 [inline] pc : debug_object_active_state+0x2a8/0x37c lib/debugobjects.c:954 lr : debug_print_object lib/debugobjects.c:514 [inline] lr : debug_object_active_state+0x2a8/0x37c lib/debugobjects.c:954 sp : ffff800080007ad0 x29: ffff800080007ad0 x28: 00000000000000c0 x27: dfff800000000000 x26: 1fffe0001a95d34b x25: 0000000000000003 x24: ffff800093738000 x23: 0000000000000001 x22: ffff80008aef0200 x21: ffff0000d010cd00 x20: ffff80008b41a2e0 x19: 0000000000000000 x18: ffff800080006fa0 x17: 3863373030303030 x16: ffff80008ad6b09c x15: 0000000000000001 x14: 1fffe00036800002 x13: 0000000000000000 x12: 0000000000000000 x11: 0000000000010004 x10: 0000000000ff0100 x9 : 42aaeb85fb1b0600 x8 : 42aaeb85fb1b0600 x7 : 0000000000000001 x6 : 0000000000000001 x5 : ffff8000800073b8 x4 : ffff80008ed822c0 x3 : ffff8000805ba130 x2 : 0000000000000001 x1 : 0000000100010002 x0 : 0000000000000000 Call trace: debug_print_object lib/debugobjects.c:514 [inline] debug_object_active_state+0x2a8/0x37c lib/debugobjects.c:954 debug_rcu_head_queue kernel/rcu/rcu.h:228 [inline] __call_rcu_common kernel/rcu/tree.c:2700 [inline] call_rcu+0x60/0xaf4 kernel/rcu/tree.c:2829 switch_schedules net/sched/sch_taprio.c:210 [inline] advance_sched+0x7e0/0xac0 net/sched/sch_taprio.c:984 __run_hrtimer kernel/time/hrtimer.c:1689 [inline] __hrtimer_run_queues+0x484/0xca0 kernel/time/hrtimer.c:1753 hrtimer_interrupt+0x2c0/0xb64 kernel/time/hrtimer.c:1815 timer_handler drivers/clocksource/arm_arch_timer.c:674 [inline] arch_timer_handler_virt+0x74/0x88 drivers/clocksource/arm_arch_timer.c:685 handle_percpu_devid_irq+0x2a4/0x804 kernel/irq/chip.c:942 generic_handle_irq_desc include/linux/irqdesc.h:161 [inline] handle_irq_desc kernel/irq/irqdesc.c:672 [inline] generic_handle_domain_irq+0x7c/0xc4 kernel/irq/irqdesc.c:728 __gic_handle_irq drivers/irqchip/irq-gic-v3.c:782 [inline] __gic_handle_irq_from_irqson drivers/irqchip/irq-gic-v3.c:833 [inline] gic_handle_irq+0x6c/0x190 drivers/irqchip/irq-gic-v3.c:877 call_on_irq_stack+0x24/0x4c arch/arm64/kernel/entry.S:889 do_interrupt_handler+0xd4/0x138 arch/arm64/kernel/entry-common.c:310 __el1_irq arch/arm64/kernel/entry-common.c:536 [inline] el1_interrupt+0x34/0x68 arch/arm64/kernel/entry-common.c:551 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:556 el1h_64_irq+0x64/0x68 arch/arm64/kernel/entry.S:594 __daif_local_irq_enable arch/arm64/include/asm/irqflags.h:27 [inline] arch_local_irq_enable+0x8/0xc arch/arm64/include/asm/irqflags.h:49 cpuidle_idle_call kernel/sched/idle.c:170 [inline] do_idle+0x1f0/0x4e8 kernel/sched/idle.c:312 cpu_startup_entry+0x5c/0x74 kernel/sched/idle.c:410 rest_init+0x2dc/0x2f4 init/main.c:730 start_kernel+0x0/0x4ec init/main.c:827 start_kernel+0x3ec/0x4ec init/main.c:1072 __primary_switched+0x84/0x8c arch/arm64/kernel/head.S:243 irq event stamp: 700776 hardirqs last enabled at (700775): [] default_idle_call+0xf4/0x128 kernel/sched/idle.c:103 hardirqs last disabled at (700776): [] __el1_irq arch/arm64/kernel/entry-common.c:533 [inline] hardirqs last disabled at (700776): [] el1_interrupt+0x24/0x68 arch/arm64/kernel/entry-common.c:551 softirqs last enabled at (700464): [] softirq_handle_end kernel/softirq.c:399 [inline] softirqs last enabled at (700464): [] __do_softirq+0xac8/0xce4 kernel/softirq.c:582 softirqs last disabled at (700459): [] ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:81 ---[ end trace 0000000000000000 ]--- rcu: __call_rcu_common(): Double-freed CB 000000007c840c9e->taprio_free_sched_cb+0x0/0x178()!!! slab kmalloc-512 start ffff0000d010cc00 pointer offset 256 size 512 --- 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.