INFO: task syz.3.82:6953 blocked for more than 143 seconds. Not tainted 6.15.0-rc5-syzkaller-gc32f8dc5aaf9 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.3.82 state:D stack:0 pid:6953 tgid:6953 ppid:6489 task_flags:0x400040 flags:0x00000009 Call trace: __switch_to+0x414/0x834 arch/arm64/kernel/process.c:734 (T) context_switch kernel/sched/core.c:5382 [inline] __schedule+0x13b0/0x28d4 kernel/sched/core.c:6767 __schedule_loop kernel/sched/core.c:6845 [inline] schedule+0xb4/0x230 kernel/sched/core.c:6860 exp_funnel_lock kernel/rcu/tree_exp.h:327 [inline] synchronize_rcu_expedited+0x504/0x624 kernel/rcu/tree_exp.h:998 synchronize_net+0x80/0xa8 net/core/dev.c:11832 veth_napi_del_range+0x12c/0x268 drivers/net/veth.c:1043 veth_napi_del drivers/net/veth.c:1060 [inline] veth_disable_xdp drivers/net/veth.c:1162 [inline] veth_xdp_set drivers/net/veth.c:1584 [inline] veth_xdp+0x520/0x86c drivers/net/veth.c:1608 netif_xdp_propagate+0x190/0x2bc net/core/dev.c:9876 dev_xdp_propagate+0x104/0x1fc net/core/dev_api.c:324 bond_xdp_set drivers/net/bonding/bond_main.c:5728 [inline] bond_xdp+0x374/0x6f0 drivers/net/bonding/bond_main.c:5774 dev_xdp_install+0x370/0x514 net/core/dev.c:9934 dev_xdp_detach_link net/core/dev.c:10126 [inline] bpf_xdp_link_release+0x2ec/0x4a0 net/core/dev.c:10142 bpf_link_free+0xe8/0x2d4 kernel/bpf/syscall.c:3156 bpf_link_put_direct kernel/bpf/syscall.c:3199 [inline] bpf_link_release+0x80/0xbc kernel/bpf/syscall.c:3206 __fput+0x340/0x75c fs/file_table.c:465 ____fput+0x20/0x58 fs/file_table.c:493 task_work_run+0x1dc/0x260 kernel/task_work.c:227 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] do_notify_resume+0x16c/0x1ec arch/arm64/kernel/entry-common.c:151 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:169 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:178 [inline] el0_svc+0xb4/0x17c arch/arm64/kernel/entry-common.c:768 el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:786 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 INFO: task syz.3.82:6962 blocked for more than 143 seconds. Not tainted 6.15.0-rc5-syzkaller-gc32f8dc5aaf9 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.3.82 state:D stack:0 pid:6962 tgid:6953 ppid:6489 task_flags:0x400040 flags:0x00000001 Call trace: __switch_to+0x414/0x834 arch/arm64/kernel/process.c:734 (T) context_switch kernel/sched/core.c:5382 [inline] __schedule+0x13b0/0x28d4 kernel/sched/core.c:6767 __schedule_loop kernel/sched/core.c:6845 [inline] schedule+0xb4/0x230 kernel/sched/core.c:6860 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6917 __mutex_lock_common+0xbd0/0x2190 kernel/locking/mutex.c:678 __mutex_lock kernel/locking/mutex.c:746 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:798 exp_funnel_lock kernel/rcu/tree_exp.h:336 [inline] synchronize_rcu_expedited+0x290/0x624 kernel/rcu/tree_exp.h:998 lru_cache_disable+0x3c/0x78 mm/swap.c:918 do_mbind mm/mempolicy.c:1342 [inline] kernel_mbind mm/mempolicy.c:1568 [inline] __do_sys_mbind mm/mempolicy.c:1642 [inline] __se_sys_mbind mm/mempolicy.c:1638 [inline] __arm64_sys_mbind+0x6b8/0xc0c mm/mempolicy.c:1638 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x58/0x17c arch/arm64/kernel/entry-common.c:767 el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:786 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 Showing all locks held in the system: 1 lock held by kthreadd/2: 3 locks held by kworker/u8:0/12: 3 locks held by kworker/u8:1/13: 1 lock held by khungtaskd/32: #0: ffff80008f4f88a0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire+0x4/0x48 include/linux/rcupdate.h:330 3 locks held by kworker/u8:2/39: 3 locks held by kworker/u8:3/45: #0: ffff0000c0031948 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work+0x658/0x156c kernel/workqueue.c:3212 #1: ffff800097d57bc0 ((crda_timeout).work){+.+.}-{0:0}, at: process_one_work+0x6ec/0x156c kernel/workqueue.c:3212 #2: ffff80009247ace8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 3 locks held by kworker/u8:4/167: 3 locks held by kworker/u8:5/242: 3 locks held by kworker/u8:6/570: 3 locks held by kworker/u8:7/592: 3 locks held by kworker/u8:8/726: 2 locks held by kworker/1:3/2307: 3 locks held by kworker/R-ipv6_/4141: #0: ffff0000d2265148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x658/0x156c kernel/workqueue.c:3212 #1: ffff8000a0d87ba0 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x6ec/0x156c kernel/workqueue.c:3212 #2: ffff80009247ace8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 4 locks held by kworker/R-bat_e/4222: 1 lock held by klogd/6094: 2 locks held by udevd/6105: 1 lock held by dhcpcd/6159: 1 lock held by dhcpcd/6160: 2 locks held by getty/6255: #0: ffff0000ccac40a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80009b5be2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x34c/0xfa0 drivers/tty/n_tty.c:2222 1 lock held by syz-executor/6478: 1 lock held by udevd/6480: 2 locks held by udevd/6482: 4 locks held by syz-executor/6494: 2 locks held by syz-executor/6495: 2 locks held by udevd/6596: 3 locks held by kworker/u8:9/6829: 3 locks held by kworker/u8:10/6879: 1 lock held by syz.3.82/6953: #0: ffff80009247ace8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 1 lock held by syz.3.82/6954: 1 lock held by syz.3.82/6962: #0: ffff80008f4fe3b8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:336 [inline] #0: ffff80008f4fe3b8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x290/0x624 kernel/rcu/tree_exp.h:998 3 locks held by kworker/u8:11/6967: 3 locks held by kworker/u8:12/6968: #0: ffff0000c0031948 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work+0x658/0x156c kernel/workqueue.c:3212 #1: ffff8000a3d37bc0 ((reg_check_chans).work){+.+.}-{0:0}, at: process_one_work+0x6ec/0x156c kernel/workqueue.c:3212 #2: ffff80009247ace8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 =============================================