===================================================== WARNING: HARDIRQ-safe -> HARDIRQ-unsafe lock order detected 6.8.0-syzkaller-08951-gfe46a7dd189e #0 Not tainted ----------------------------------------------------- kworker/u8:4/61 [HC0[0]:SC0[2]:HE0:SE0] is trying to acquire: ffff88807f2b5020 (&htab->buckets[i].lock){+...}-{2:2}, at: spin_lock_bh include/linux/spinlock.h:356 [inline] ffff88807f2b5020 (&htab->buckets[i].lock){+...}-{2:2}, at: sock_hash_delete_elem+0xcb/0x260 net/core/sock_map.c:939 and this task is already holding: ffff8880150a0018 (&pool->lock){-.-.}-{2:2}, at: __queue_work+0x39e/0x1170 kernel/workqueue.c:2360 which would create a new lock dependency: (&pool->lock){-.-.}-{2:2} -> (&htab->buckets[i].lock){+...}-{2:2} but this new dependency connects a HARDIRQ-irq-safe lock: (&pool->lock){-.-.}-{2:2} ... which became HARDIRQ-irq-safe at: lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x540 kernel/locking/lockdep.c:5719 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154 __queue_work+0x39e/0x1170 kernel/workqueue.c:2360 queue_work_on+0xf4/0x120 kernel/workqueue.c:2435 tick_nohz_activate kernel/time/tick-sched.c:1491 [inline] tick_setup_sched_timer+0x47c/0x790 kernel/time/tick-sched.c:1592 hrtimer_switch_to_hres kernel/time/hrtimer.c:750 [inline] hrtimer_run_queues+0x33c/0x450 kernel/time/hrtimer.c:1918 run_local_timers kernel/time/timer.c:2453 [inline] update_process_times+0xcf/0x220 kernel/time/timer.c:2475 tick_periodic+0x7e/0x230 kernel/time/tick-common.c:100 tick_handle_periodic+0x45/0x120 kernel/time/tick-common.c:112 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline] __sysvec_apic_timer_interrupt+0x10f/0x410 arch/x86/kernel/apic/apic.c:1049 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0x90/0xb0 arch/x86/kernel/apic/apic.c:1043 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 lock_acquire+0x1f2/0x540 kernel/locking/lockdep.c:5722 down_write_nested+0x3d/0x50 kernel/locking/rwsem.c:1695 alloc_super+0x23d/0xbd0 fs/super.c:343 sget+0x11b/0x760 fs/super.c:840 mount_single+0x39/0x200 fs/super.c:1742 legacy_get_tree+0x109/0x220 fs/fs_context.c:662 vfs_get_tree+0x8f/0x380 fs/super.c:1779 fc_mount fs/namespace.c:1125 [inline] vfs_kern_mount.part.0+0xcf/0x170 fs/namespace.c:1155 vfs_kern_mount+0x3f/0x60 fs/namespace.c:1142 simple_pin_fs+0xf2/0x190 fs/libfs.c:1016 tracefs_start_creating+0x3b/0x2a0 fs/tracefs/inode.c:462 tracefs_create_file+0x9d/0x810 fs/tracefs/inode.c:567 trace_create_file+0x33/0x70 kernel/trace/trace.c:9167 init_trace_printk_function_export+0x3f/0x50 kernel/trace/trace_printk.c:387 do_one_initcall+0x128/0x690 init/main.c:1241 do_initcall_level init/main.c:1303 [inline] do_initcalls init/main.c:1319 [inline] do_basic_setup init/main.c:1338 [inline] kernel_init_freeable+0x69d/0xc40 init/main.c:1550 kernel_init+0x1c/0x2a0 init/main.c:1439 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243 to a HARDIRQ-irq-unsafe lock: (&htab->buckets[i].lock){+...}-{2:2} ... which became HARDIRQ-irq-unsafe at: ... lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x540 kernel/locking/lockdep.c:5719 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline] _raw_spin_lock_bh+0x33/0x40 kernel/locking/spinlock.c:178 spin_lock_bh include/linux/spinlock.h:356 [inline] sock_hash_free+0x130/0x820 net/core/sock_map.c:1154 bpf_map_free_deferred+0x1ce/0x420 kernel/bpf/syscall.c:734 process_one_work+0x9a9/0x1a60 kernel/workqueue.c:3254 process_scheduled_works kernel/workqueue.c:3335 [inline] worker_thread+0x6c8/0xf70 kernel/workqueue.c:3416 kthread+0x2c1/0x3a0 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243 other info that might help us debug this: Possible interrupt unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&htab->buckets[i].lock); local_irq_disable(); lock(&pool->lock); lock(&htab->buckets[i].lock); lock(&pool->lock); *** DEADLOCK *** 8 locks held by kworker/u8:4/61: #0: ffff888015ed3148 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x1296/0x1a60 kernel/workqueue.c:3229 #1: ffffc900015c7d80 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x906/0x1a60 kernel/workqueue.c:3230 #2: ffffffff8f2e1650 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0xbb/0xbf0 net/core/net_namespace.c:591 #3: ffffffff8f2f63c8 (rtnl_mutex){+.+.}-{3:3}, at: default_device_exit_batch+0x8c/0xae0 net/core/dev.c:11617 #4: ffffffff8d7b08e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline] #4: ffffffff8d7b08e0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline] #4: ffffffff8d7b08e0 (rcu_read_lock){....}-{1:2}, at: atomic_notifier_call_chain+0x3a/0x1c0 kernel/notifier.c:230 #5: ffffffff8d7b08e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline] #5: ffffffff8d7b08e0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline] #5: ffffffff8d7b08e0 (rcu_read_lock){....}-{1:2}, at: __queue_work+0xf2/0x1170 kernel/workqueue.c:2324 #6: ffff8880150a0018 (&pool->lock){-.-.}-{2:2}, at: __queue_work+0x39e/0x1170 kernel/workqueue.c:2360 #7: ffffffff8d7b08e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline] #7: ffffffff8d7b08e0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline] #7: ffffffff8d7b08e0 (rcu_read_lock){....}-{1:2}, at: __bpf_trace_run kernel/trace/bpf_trace.c:2380 [inline] #7: ffffffff8d7b08e0 (rcu_read_lock){....}-{1:2}, at: bpf_trace_run3+0xf8/0x440 kernel/trace/bpf_trace.c:2421 the dependencies between HARDIRQ-irq-safe lock and the holding lock: -> (&pool->lock){-.-.}-{2:2} { IN-HARDIRQ-W at: lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x540 kernel/locking/lockdep.c:5719 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154 __queue_work+0x39e/0x1170 kernel/workqueue.c:2360 queue_work_on+0xf4/0x120 kernel/workqueue.c:2435 tick_nohz_activate kernel/time/tick-sched.c:1491 [inline] tick_setup_sched_timer+0x47c/0x790 kernel/time/tick-sched.c:1592 hrtimer_switch_to_hres kernel/time/hrtimer.c:750 [inline] hrtimer_run_queues+0x33c/0x450 kernel/time/hrtimer.c:1918 run_local_timers kernel/time/timer.c:2453 [inline] update_process_times+0xcf/0x220 kernel/time/timer.c:2475 tick_periodic+0x7e/0x230 kernel/time/tick-common.c:100 tick_handle_periodic+0x45/0x120 kernel/time/tick-common.c:112 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline] __sysvec_apic_timer_interrupt+0x10f/0x410 arch/x86/kernel/apic/apic.c:1049 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0x90/0xb0 arch/x86/kernel/apic/apic.c:1043 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 lock_acquire+0x1f2/0x540 kernel/locking/lockdep.c:5722 down_write_nested+0x3d/0x50 kernel/locking/rwsem.c:1695 alloc_super+0x23d/0xbd0 fs/super.c:343 sget+0x11b/0x760 fs/super.c:840 mount_single+0x39/0x200 fs/super.c:1742 legacy_get_tree+0x109/0x220 fs/fs_context.c:662 vfs_get_tree+0x8f/0x380 fs/super.c:1779 fc_mount fs/namespace.c:1125 [inline] vfs_kern_mount.part.0+0xcf/0x170 fs/namespace.c:1155 vfs_kern_mount+0x3f/0x60 fs/namespace.c:1142 simple_pin_fs+0xf2/0x190 fs/libfs.c:1016 tracefs_start_creating+0x3b/0x2a0 fs/tracefs/inode.c:462 tracefs_create_file+0x9d/0x810 fs/tracefs/inode.c:567 trace_create_file+0x33/0x70 kernel/trace/trace.c:9167 init_trace_printk_function_export+0x3f/0x50 kernel/trace/trace_printk.c:387 do_one_initcall+0x128/0x690 init/main.c:1241 do_initcall_level init/main.c:1303 [inline] do_initcalls init/main.c:1319 [inline] do_basic_setup init/main.c:1338 [inline] kernel_init_freeable+0x69d/0xc40 init/main.c:1550 kernel_init+0x1c/0x2a0 init/main.c:1439 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243 IN-SOFTIRQ-W at: lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x540 kernel/locking/lockdep.c:5719 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154 __queue_work+0x39e/0x1170 kernel/workqueue.c:2360 call_timer_fn+0x1a0/0x5b0 kernel/time/timer.c:1792 expire_timers kernel/time/timer.c:1838 [inline] __run_timers+0x567/0xab0 kernel/time/timer.c:2408 __run_timer_base kernel/time/timer.c:2419 [inline] __run_timer_base kernel/time/timer.c:2412 [inline] run_timer_base+0x111/0x190 kernel/time/timer.c:2428 run_timer_softirq+0x1a/0x40 kernel/time/timer.c:2438 __do_softirq+0x218/0x8de kernel/softirq.c:554 invoke_softirq kernel/softirq.c:428 [inline] __irq_exit_rcu kernel/softirq.c:633 [inline] irq_exit_rcu+0xb9/0x120 kernel/softirq.c:645 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0x95/0xb0 arch/x86/kernel/apic/apic.c:1043 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline] arch_safe_halt arch/x86/include/asm/irqflags.h:86 [inline] default_idle+0xf/0x20 arch/x86/kernel/process.c:742 default_idle_call+0x6d/0xb0 kernel/sched/idle.c:117 cpuidle_idle_call kernel/sched/idle.c:191 [inline] do_idle+0x32c/0x3f0 kernel/sched/idle.c:332 cpu_startup_entry+0x4f/0x60 kernel/sched/idle.c:430 rest_init+0x16f/0x2b0 init/main.c:730 arch_call_rest_init+0x13/0x40 init/main.c:831 start_kernel+0x3a3/0x490 init/main.c:1077 x86_64_start_reservations+0x18/0x30 arch/x86/kernel/head64.c:509 x86_64_start_kernel+0xb2/0xc0 arch/x86/kernel/head64.c:490 common_startup_64+0x13e/0x148 INITIAL USE at: lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x540 kernel/locking/lockdep.c:5719 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154 __queue_work+0x39e/0x1170 kernel/workqueue.c:2360 queue_work_on+0xf4/0x120 kernel/workqueue.c:2435 queue_work include/linux/workqueue.h:605 [inline] start_poll_synchronize_rcu_expedited+0x147/0x180 kernel/rcu/tree_exp.h:1017 rcu_init+0x1625/0x20c0 kernel/rcu/tree.c:5240 start_kernel+0x19e/0x490 init/main.c:969 x86_64_start_reservations+0x18/0x30 arch/x86/kernel/head64.c:509 x86_64_start_kernel+0xb2/0xc0 arch/x86/kernel/head64.c:490 common_startup_64+0x13e/0x148 } ... key at: [] __key.17+0x0/0x40 the dependencies between the lock to be acquired and HARDIRQ-irq-unsafe lock: -> (&htab->buckets[i].lock){+...}-{2:2} { HARDIRQ-ON-W at: lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x540 kernel/locking/lockdep.c:5719 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline] _raw_spin_lock_bh+0x33/0x40 kernel/locking/spinlock.c:178 spin_lock_bh include/linux/spinlock.h:356 [inline] sock_hash_free+0x130/0x820 net/core/sock_map.c:1154 bpf_map_free_deferred+0x1ce/0x420 kernel/bpf/syscall.c:734 process_one_work+0x9a9/0x1a60 kernel/workqueue.c:3254 process_scheduled_works kernel/workqueue.c:3335 [inline] worker_thread+0x6c8/0xf70 kernel/workqueue.c:3416 kthread+0x2c1/0x3a0 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243 INITIAL USE at: lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x540 kernel/locking/lockdep.c:5719 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline] _raw_spin_lock_bh+0x33/0x40 kernel/locking/spinlock.c:178 spin_lock_bh include/linux/spinlock.h:356 [inline] sock_hash_free+0x130/0x820 net/core/sock_map.c:1154 bpf_map_free_deferred+0x1ce/0x420 kernel/bpf/syscall.c:734 process_one_work+0x9a9/0x1a60 kernel/workqueue.c:3254 process_scheduled_works kernel/workqueue.c:3335 [inline] worker_thread+0x6c8/0xf70 kernel/workqueue.c:3416 kthread+0x2c1/0x3a0 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243 } ... key at: [] __key.0+0x0/0x40 ... acquired at: lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x540 kernel/locking/lockdep.c:5719 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline] _raw_spin_lock_bh+0x33/0x40 kernel/locking/spinlock.c:178 spin_lock_bh include/linux/spinlock.h:356 [inline] sock_hash_delete_elem+0xcb/0x260 net/core/sock_map.c:939 ___bpf_prog_run+0x3e51/0xae80 kernel/bpf/core.c:1997 __bpf_prog_run32+0xc1/0x100 kernel/bpf/core.c:2236 bpf_dispatcher_nop_func include/linux/bpf.h:1234 [inline] __bpf_prog_run include/linux/filter.h:657 [inline] bpf_prog_run include/linux/filter.h:664 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2381 [inline] bpf_trace_run3+0x167/0x440 kernel/trace/bpf_trace.c:2421 __bpf_trace_workqueue_queue_work+0x101/0x140 include/trace/events/workqueue.h:23 __traceiter_workqueue_queue_work+0x6c/0xc0 include/trace/events/workqueue.h:23 trace_workqueue_queue_work include/trace/events/workqueue.h:23 [inline] __queue_work+0x627/0x1170 kernel/workqueue.c:2382 queue_work_on+0xf4/0x120 kernel/workqueue.c:2435 queue_work include/linux/workqueue.h:605 [inline] addr_event.constprop.0+0x391/0x560 drivers/infiniband/core/roce_gid_mgmt.c:853 inet6addr_event+0x117/0x180 drivers/infiniband/core/roce_gid_mgmt.c:883 notifier_call_chain+0xb9/0x3e0 kernel/notifier.c:93 atomic_notifier_call_chain+0x71/0x1c0 kernel/notifier.c:231 addrconf_ifdown.isra.0+0xf03/0x1b40 net/ipv6/addrconf.c:3978 addrconf_notify+0x223/0x19e0 net/ipv6/addrconf.c:3776 notifier_call_chain+0xb9/0x3e0 kernel/notifier.c:93 call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:1950 call_netdevice_notifiers_extack net/core/dev.c:1988 [inline] call_netdevice_notifiers net/core/dev.c:2002 [inline] dev_close_many+0x333/0x6a0 net/core/dev.c:1543 unregister_netdevice_many_notify+0x46d/0x19f0 net/core/dev.c:11071 unregister_netdevice_many net/core/dev.c:11154 [inline] default_device_exit_batch+0x85b/0xae0 net/core/dev.c:11631 ops_exit_list+0x128/0x180 net/core/net_namespace.c:175 cleanup_net+0x5b7/0xbf0 net/core/net_namespace.c:637 process_one_work+0x9a9/0x1a60 kernel/workqueue.c:3254 process_scheduled_works kernel/workqueue.c:3335 [inline] worker_thread+0x6c8/0xf70 kernel/workqueue.c:3416 kthread+0x2c1/0x3a0 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243 stack backtrace: 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: netns cleanup_net Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114 print_bad_irq_dependency kernel/locking/lockdep.c:2626 [inline] check_irq_usage+0xe3c/0x1490 kernel/locking/lockdep.c:2865 check_prev_add kernel/locking/lockdep.c:3138 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain kernel/locking/lockdep.c:3869 [inline] __lock_acquire+0x248e/0x3b30 kernel/locking/lockdep.c:5137 lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x540 kernel/locking/lockdep.c:5719 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline] _raw_spin_lock_bh+0x33/0x40 kernel/locking/spinlock.c:178 spin_lock_bh include/linux/spinlock.h:356 [inline] sock_hash_delete_elem+0xcb/0x260 net/core/sock_map.c:939 ___bpf_prog_run+0x3e51/0xae80 kernel/bpf/core.c:1997 __bpf_prog_run32+0xc1/0x100 kernel/bpf/core.c:2236 bpf_dispatcher_nop_func include/linux/bpf.h:1234 [inline] __bpf_prog_run include/linux/filter.h:657 [inline] bpf_prog_run include/linux/filter.h:664 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2381 [inline] bpf_trace_run3+0x167/0x440 kernel/trace/bpf_trace.c:2421 __bpf_trace_workqueue_queue_work+0x101/0x140 include/trace/events/workqueue.h:23 __traceiter_workqueue_queue_work+0x6c/0xc0 include/trace/events/workqueue.h:23 trace_workqueue_queue_work include/trace/events/workqueue.h:23 [inline] __queue_work+0x627/0x1170 kernel/workqueue.c:2382 queue_work_on+0xf4/0x120 kernel/workqueue.c:2435 queue_work include/linux/workqueue.h:605 [inline] addr_event.constprop.0+0x391/0x560 drivers/infiniband/core/roce_gid_mgmt.c:853 inet6addr_event+0x117/0x180 drivers/infiniband/core/roce_gid_mgmt.c:883 notifier_call_chain+0xb9/0x3e0 kernel/notifier.c:93 atomic_notifier_call_chain+0x71/0x1c0 kernel/notifier.c:231 addrconf_ifdown.isra.0+0xf03/0x1b40 net/ipv6/addrconf.c:3978 addrconf_notify+0x223/0x19e0 net/ipv6/addrconf.c:3776 notifier_call_chain+0xb9/0x3e0 kernel/notifier.c:93 call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:1950 call_netdevice_notifiers_extack net/core/dev.c:1988 [inline] call_netdevice_notifiers net/core/dev.c:2002 [inline] dev_close_many+0x333/0x6a0 net/core/dev.c:1543 unregister_netdevice_many_notify+0x46d/0x19f0 net/core/dev.c:11071 unregister_netdevice_many net/core/dev.c:11154 [inline] default_device_exit_batch+0x85b/0xae0 net/core/dev.c:11631 ops_exit_list+0x128/0x180 net/core/net_namespace.c:175 cleanup_net+0x5b7/0xbf0 net/core/net_namespace.c:637 process_one_work+0x9a9/0x1a60 kernel/workqueue.c:3254 process_scheduled_works kernel/workqueue.c:3335 [inline] worker_thread+0x6c8/0xf70 kernel/workqueue.c:3416 kthread+0x2c1/0x3a0 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243