watchdog: BUG: soft lockup - CPU#1 stuck for 23s! [syz-executor.3:8601] Modules linked in: irq event stamp: 9141 hardirqs last enabled at (9140): [] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:85 [inline] hardirqs last enabled at (9140): [] exit_to_kernel_mode+0xdc/0x10c arch/arm64/kernel/entry-common.c:95 hardirqs last disabled at (9141): [] __el1_irq arch/arm64/kernel/entry-common.c:533 [inline] hardirqs last disabled at (9141): [] el1_interrupt+0x24/0x68 arch/arm64/kernel/entry-common.c:551 softirqs last enabled at (1980): [] dev_reset_queue+0x184/0x1fc softirqs last disabled at (1981): [] ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:81 CPU: 1 PID: 8601 Comm: syz-executor.3 Not tainted 6.9.0-rc6-syzkaller-g78186bd77b47 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : preempt_count arch/arm64/include/asm/preempt.h:13 [inline] pc : check_kcov_mode kernel/kcov.c:173 [inline] pc : __sanitizer_cov_trace_pc+0x14/0x6c kernel/kcov.c:207 lr : taprio_dequeue_tc_priority+0x164/0x640 net/sched/sch_taprio.c:787 sp : ffff800080017c40 x29: ffff800080017ca0 x28: 0000000000000001 x27: 0000000000000000 x26: ffff0000eee2c042 x25: 0000000000000009 x24: ffff0000ecc14394 x23: 0000000000000008 x22: ffff0000eee2c044 x21: 1fffe0001d982872 x20: 1fffe0001ddc5808 x19: dfff800000000000 x18: 000000000000001b x17: ffff800124ff9000 x16: ffff800080553b08 x15: 0000000000000001 x14: ffff80008eea0668 x13: dfff800000000000 x12: 0000000058ccdf7f x11: 0000000056d1f5a5 x10: 0000000000ff0100 x9 : 0000000000000102 x8 : ffff0000f5e48000 x7 : ffff800089333ae8 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : 00000000000007ff x2 : ffff0000c6aeb800 x1 : 0000000000000010 x0 : 000000000000000a Call trace: preempt_count arch/arm64/include/asm/preempt.h:13 [inline] check_kcov_mode kernel/kcov.c:173 [inline] __sanitizer_cov_trace_pc+0x14/0x6c kernel/kcov.c:207 taprio_dequeue+0x174/0x508 dequeue_skb net/sched/sch_generic.c:293 [inline] qdisc_restart net/sched/sch_generic.c:398 [inline] __qdisc_run+0x1e4/0x2388 net/sched/sch_generic.c:416 qdisc_run+0xc4/0x23c include/net/pkt_sched.h:127 net_tx_action+0x724/0x8d8 net/core/dev.c:5206 __do_softirq+0x2e4/0xd2c kernel/softirq.c:554 ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:81 call_on_irq_stack+0x24/0x4c arch/arm64/kernel/entry.S:889 do_softirq_own_stack+0x20/0x2c arch/arm64/kernel/irq.c:86 do_softirq+0x90/0xf8 kernel/softirq.c:455 __local_bh_enable_ip+0x288/0x44c kernel/softirq.c:382 __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:167 [inline] _raw_spin_unlock_bh+0x3c/0x4c kernel/locking/spinlock.c:210 dev_reset_queue+0x184/0x1fc netdev_for_each_tx_queue include/linux/netdevice.h:2500 [inline] dev_deactivate_many+0x540/0xa8c net/sched/sch_generic.c:1365 dev_deactivate+0x13c/0x1fc net/sched/sch_generic.c:1388 qdisc_graft+0x710/0x1220 net/sched/sch_api.c:1137 tc_modify_qdisc+0xcc0/0x1870 net/sched/sch_api.c:1787 rtnetlink_rcv_msg+0x724/0xdbc net/core/rtnetlink.c:6595 netlink_rcv_skb+0x214/0x3c4 net/netlink/af_netlink.c:2559 rtnetlink_rcv+0x28/0x38 net/core/rtnetlink.c:6613 netlink_unicast_kernel net/netlink/af_netlink.c:1335 [inline] netlink_unicast+0x65c/0x898 net/netlink/af_netlink.c:1361 netlink_sendmsg+0x7a0/0xa84 net/netlink/af_netlink.c:1905 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg net/socket.c:745 [inline] ____sys_sendmsg+0x56c/0x840 net/socket.c:2584 ___sys_sendmsg net/socket.c:2638 [inline] __sys_sendmsg+0x26c/0x33c net/socket.c:2667 __do_sys_sendmsg net/socket.c:2676 [inline] __se_sys_sendmsg net/socket.c:2674 [inline] __arm64_sys_sendmsg+0x80/0x94 net/socket.c:2674 __invoke_syscall arch/arm64/kernel/syscall.c:34 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:48 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:133 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:152 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:712 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 7905 Comm: syz-executor.3 Not tainted 6.9.0-rc6-syzkaller-g78186bd77b47 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : lock_acquire+0x284/0x73c lr : lockdep_recursion_finish kernel/locking/lockdep.c:467 [inline] lr : lock_acquire+0x254/0x73c kernel/locking/lockdep.c:5756 sp : ffff80009c0c7040 x29: ffff80009c0c7150 x28: dfff800000000000 x27: ffff700013818e14 x26: ffff0001b3dc6dc0 x25: ffff80008f0778c0 x24: 0000000000000000 x23: 0000000000000000 x22: 0000000000000000 x21: 0000000000000000 x20: ffff80008edf1dc0 x19: ffff0001b3dc6dc0 x18: 0000000000000001 x17: ffff80008ee9d000 x16: ffff80008ae88760 x15: 0000000000000001 x14: ffff80008eea0668 x13: dfff800000000000 x12: 00000000a07e3d43 x11: 0000000000040000 x10: 0000000000ff0100 x9 : 0000000000000002 x8 : 00000000000000c0 x7 : ffff800080abe9f4 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000002 x2 : 0000000000000008 x1 : 0000000000000080 x0 : 0000000000000000 Call trace: __daif_local_irq_restore arch/arm64/include/asm/irqflags.h:175 [inline] arch_local_irq_restore arch/arm64/include/asm/irqflags.h:195 [inline] lock_acquire+0x284/0x73c kernel/locking/lockdep.c:5757 rcu_lock_acquire+0x38/0x44 include/linux/rcupdate.h:329 rcu_read_lock include/linux/rcupdate.h:781 [inline] percpu_ref_get_many+0x28/0x23c include/linux/percpu-refcount.h:202 percpu_ref_get include/linux/percpu-refcount.h:222 [inline] css_get include/linux/cgroup_refcnt.h:11 [inline] mem_cgroup_commit_charge+0x5c/0x1c0 mm/memcontrol.c:2971 charge_memcg mm/memcontrol.c:7288 [inline] __mem_cgroup_charge+0xbc/0x148 mm/memcontrol.c:7299 mem_cgroup_charge include/linux/memcontrol.h:691 [inline] __filemap_add_folio+0x304/0x1174 mm/filemap.c:864 filemap_add_folio+0x10c/0x298 mm/filemap.c:947 do_read_cache_folio+0xec/0x548 mm/filemap.c:3714 do_read_cache_page mm/filemap.c:3813 [inline] read_cache_page+0x6c/0x15c mm/filemap.c:3822 read_mapping_page include/linux/pagemap.h:888 [inline] dir_get_page fs/sysv/dir.c:64 [inline] sysv_find_entry+0x174/0x520 fs/sysv/dir.c:157 sysv_inode_by_name+0xa0/0x2c8 fs/sysv/dir.c:374 sysv_lookup+0x74/0xe4 fs/sysv/namei.c:38 lookup_open fs/namei.c:3475 [inline] open_last_lookups fs/namei.c:3566 [inline] path_openat+0xc90/0x2830 fs/namei.c:3796 do_filp_open+0x1bc/0x3cc fs/namei.c:3826 do_sys_openat2+0x124/0x1b8 fs/open.c:1406 do_sys_open fs/open.c:1421 [inline] __do_sys_openat fs/open.c:1437 [inline] __se_sys_openat fs/open.c:1432 [inline] __arm64_sys_openat+0x1f0/0x240 fs/open.c:1432 __invoke_syscall arch/arm64/kernel/syscall.c:34 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:48 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:133 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:152 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:712 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598