===================================================== WARNING: HARDIRQ-safe -> HARDIRQ-unsafe lock order detected 6.9.0-rc2-next-20240402-syzkaller #0 Not tainted ----------------------------------------------------- kworker/u8:2/35 [HC0[0]:SC0[2]:HE0:SE0] is trying to acquire: ffff88802db548f8 (&htab->buckets[i].lock){+...}-{2:2}, at: spin_lock_bh include/linux/spinlock.h:356 [inline] ffff88802db548f8 (&htab->buckets[i].lock){+...}-{2:2}, at: sock_hash_delete_elem+0xb0/0x300 net/core/sock_map.c:939 and this task is already holding: ffff8880b943e698 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:559 which would create a new lock dependency: (&rq->__lock){-.-.}-{2:2} -> (&htab->buckets[i].lock){+...}-{2:2} but this new dependency connects a HARDIRQ-irq-safe lock: (&rq->__lock){-.-.}-{2:2} ... which became HARDIRQ-irq-safe at: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754 _raw_spin_lock_nested+0x31/0x40 kernel/locking/spinlock.c:378 raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:559 raw_spin_rq_lock kernel/sched/sched.h:1404 [inline] rq_lock kernel/sched/sched.h:1718 [inline] sched_tick+0xa1/0x6e0 kernel/sched/core.c:5679 update_process_times+0x202/0x230 kernel/time/timer.c:2491 tick_periodic+0x190/0x220 kernel/time/tick-common.c:100 tick_handle_periodic+0x4a/0x160 kernel/time/tick-common.c:112 timer_interrupt+0x5c/0x70 arch/x86/kernel/time.c:57 __handle_irq_event_percpu+0x29c/0xa80 kernel/irq/handle.c:158 handle_irq_event_percpu kernel/irq/handle.c:193 [inline] handle_irq_event+0x89/0x1f0 kernel/irq/handle.c:210 handle_level_irq+0x3c5/0x6e0 kernel/irq/chip.c:648 generic_handle_irq_desc include/linux/irqdesc.h:161 [inline] handle_irq arch/x86/kernel/irq.c:238 [inline] __common_interrupt+0x13a/0x230 arch/x86/kernel/irq.c:257 common_interrupt+0xa5/0xd0 arch/x86/kernel/irq.c:247 asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:693 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] _raw_spin_unlock_irqrestore+0xd8/0x140 kernel/locking/spinlock.c:194 __setup_irq+0x1335/0x1e20 kernel/irq/manage.c:1823 request_threaded_irq+0x2ab/0x380 kernel/irq/manage.c:2207 request_irq include/linux/interrupt.h:171 [inline] setup_default_timer_irq+0x25/0x60 arch/x86/kernel/time.c:70 x86_late_time_init+0x66/0xc0 arch/x86/kernel/time.c:94 start_kernel+0x3f3/0x500 init/main.c:1056 x86_64_start_reservations+0x2a/0x30 arch/x86/kernel/head64.c:507 x86_64_start_kernel+0x99/0xa0 arch/x86/kernel/head64.c:488 common_startup_64+0x13e/0x147 to a HARDIRQ-irq-unsafe lock: (&htab->buckets[i].lock){+...}-{2:2} ... which became HARDIRQ-irq-unsafe at: ... lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline] _raw_spin_lock_bh+0x35/0x50 kernel/locking/spinlock.c:178 spin_lock_bh include/linux/spinlock.h:356 [inline] sock_hash_delete_elem+0xb0/0x300 net/core/sock_map.c:939 bpf_prog_2c29ac5cdc6b1842+0x42/0x46 bpf_dispatcher_nop_func include/linux/bpf.h:1233 [inline] __bpf_prog_run include/linux/filter.h:660 [inline] bpf_prog_run include/linux/filter.h:674 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2396 [inline] bpf_trace_run6+0x537/0x5f0 kernel/trace/bpf_trace.c:2441 __bpf_trace_ext4_ext_remove_space_done+0x43/0x60 include/trace/events/ext4.h:2128 trace_ext4_ext_remove_space_done include/trace/events/ext4.h:2128 [inline] ext4_ext_remove_space+0x4c1c/0x4e40 fs/ext4/extents.c:3007 ext4_ext_truncate+0x159/0x2b0 fs/ext4/extents.c:4440 ext4_truncate+0xa18/0x1180 fs/ext4/inode.c:4146 ext4_setattr+0x119a/0x1bb0 fs/ext4/inode.c:5454 notify_change+0xb9d/0xe70 fs/attr.c:497 do_truncate+0x220/0x310 fs/open.c:65 handle_truncate fs/namei.c:3300 [inline] do_open fs/namei.c:3646 [inline] path_openat+0x29fe/0x3240 fs/namei.c:3799 do_filp_open+0x235/0x490 fs/namei.c:3826 do_sys_openat2+0x13e/0x1d0 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] __x64_sys_openat+0x247/0x2a0 fs/open.c:1432 do_syscall_64+0xfb/0x240 entry_SYSCALL_64_after_hwframe+0x72/0x7a other info that might help us debug this: Possible interrupt unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&htab->buckets[i].lock); local_irq_disable(); lock(&rq->__lock); lock(&htab->buckets[i].lock); lock(&rq->__lock); *** DEADLOCK *** 5 locks held by kworker/u8:2/35: #0: ffff88802a524148 ((wq_completion)bat_events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3193 [inline] #0: ffff88802a524148 ((wq_completion)bat_events){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3299 #1: ffffc90000ab7d00 ((work_completion)(&(&bat_priv->nc.work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3194 [inline] #1: ffffc90000ab7d00 ((work_completion)(&(&bat_priv->nc.work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3299 #2: ffffffff8e334da0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline] #2: ffffffff8e334da0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline] #2: ffffffff8e334da0 (rcu_read_lock){....}-{1:2}, at: batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:408 [inline] #2: ffffffff8e334da0 (rcu_read_lock){....}-{1:2}, at: batadv_nc_worker+0xcb/0x610 net/batman-adv/network-coding.c:719 #3: ffff8880b943e698 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:559 #4: ffffffff8e334da0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline] #4: ffffffff8e334da0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline] #4: ffffffff8e334da0 (rcu_read_lock){....}-{1:2}, at: __bpf_trace_run kernel/trace/bpf_trace.c:2395 [inline] #4: ffffffff8e334da0 (rcu_read_lock){....}-{1:2}, at: bpf_trace_run4+0x244/0x580 kernel/trace/bpf_trace.c:2439 the dependencies between HARDIRQ-irq-safe lock and the holding lock: -> (&rq->__lock){-.-.}-{2:2} { IN-HARDIRQ-W at: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754 _raw_spin_lock_nested+0x31/0x40 kernel/locking/spinlock.c:378 raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:559 raw_spin_rq_lock kernel/sched/sched.h:1404 [inline] rq_lock kernel/sched/sched.h:1718 [inline] sched_tick+0xa1/0x6e0 kernel/sched/core.c:5679 update_process_times+0x202/0x230 kernel/time/timer.c:2491 tick_periodic+0x190/0x220 kernel/time/tick-common.c:100 tick_handle_periodic+0x4a/0x160 kernel/time/tick-common.c:112 timer_interrupt+0x5c/0x70 arch/x86/kernel/time.c:57 __handle_irq_event_percpu+0x29c/0xa80 kernel/irq/handle.c:158 handle_irq_event_percpu kernel/irq/handle.c:193 [inline] handle_irq_event+0x89/0x1f0 kernel/irq/handle.c:210 handle_level_irq+0x3c5/0x6e0 kernel/irq/chip.c:648 generic_handle_irq_desc include/linux/irqdesc.h:161 [inline] handle_irq arch/x86/kernel/irq.c:238 [inline] __common_interrupt+0x13a/0x230 arch/x86/kernel/irq.c:257 common_interrupt+0xa5/0xd0 arch/x86/kernel/irq.c:247 asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:693 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] _raw_spin_unlock_irqrestore+0xd8/0x140 kernel/locking/spinlock.c:194 __setup_irq+0x1335/0x1e20 kernel/irq/manage.c:1823 request_threaded_irq+0x2ab/0x380 kernel/irq/manage.c:2207 request_irq include/linux/interrupt.h:171 [inline] setup_default_timer_irq+0x25/0x60 arch/x86/kernel/time.c:70 x86_late_time_init+0x66/0xc0 arch/x86/kernel/time.c:94 start_kernel+0x3f3/0x500 init/main.c:1056 x86_64_start_reservations+0x2a/0x30 arch/x86/kernel/head64.c:507 x86_64_start_kernel+0x99/0xa0 arch/x86/kernel/head64.c:488 common_startup_64+0x13e/0x147 IN-SOFTIRQ-W at: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754 _raw_spin_lock_nested+0x31/0x40 kernel/locking/spinlock.c:378 raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:559 raw_spin_rq_lock kernel/sched/sched.h:1404 [inline] rq_lock kernel/sched/sched.h:1718 [inline] ttwu_queue kernel/sched/core.c:4055 [inline] try_to_wake_up+0x7d3/0x1470 kernel/sched/core.c:4378 kick_pool+0x41b/0x5c0 kernel/workqueue.c:1275 __queue_work+0xc30/0xef0 kernel/workqueue.c:2347 call_timer_fn+0x18e/0x650 kernel/time/timer.c:1793 expire_timers kernel/time/timer.c:1839 [inline] __run_timers kernel/time/timer.c:2418 [inline] __run_timer_base+0x695/0x8e0 kernel/time/timer.c:2429 run_timer_base kernel/time/timer.c:2438 [inline] run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2448 __do_softirq+0x2c6/0x980 kernel/softirq.c:554 invoke_softirq kernel/softirq.c:428 [inline] __irq_exit_rcu+0xf2/0x1c0 kernel/softirq.c:633 irq_exit_rcu+0x9/0x30 kernel/softirq.c:645 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 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+0x13/0x20 arch/x86/kernel/process.c:742 default_idle_call+0x74/0xb0 kernel/sched/idle.c:117 cpuidle_idle_call kernel/sched/idle.c:191 [inline] do_idle+0x22f/0x5d0 kernel/sched/idle.c:332 cpu_startup_entry+0x42/0x60 kernel/sched/idle.c:430 rest_init+0x2dc/0x300 init/main.c:738 start_kernel+0x47a/0x500 init/main.c:1094 x86_64_start_reservations+0x2a/0x30 arch/x86/kernel/head64.c:507 x86_64_start_kernel+0x99/0xa0 arch/x86/kernel/head64.c:488 common_startup_64+0x13e/0x147 INITIAL USE at: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754 _raw_spin_lock_nested+0x31/0x40 kernel/locking/spinlock.c:378 raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:559 raw_spin_rq_lock kernel/sched/sched.h:1404 [inline] _raw_spin_rq_lock_irqsave kernel/sched/sched.h:1423 [inline] rq_lock_irqsave kernel/sched/sched.h:1702 [inline] rq_attach_root+0xee/0x540 kernel/sched/topology.c:494 sched_init+0x64e/0xc30 kernel/sched/core.c:10041 start_kernel+0x1ab/0x500 init/main.c:965 x86_64_start_reservations+0x2a/0x30 arch/x86/kernel/head64.c:507 x86_64_start_kernel+0x99/0xa0 arch/x86/kernel/head64.c:488 common_startup_64+0x13e/0x147 } ... key at: [] sched_init.__key+0x0/0x20 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+0x1ed/0x550 kernel/locking/lockdep.c:5754 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline] _raw_spin_lock_bh+0x35/0x50 kernel/locking/spinlock.c:178 spin_lock_bh include/linux/spinlock.h:356 [inline] sock_hash_delete_elem+0xb0/0x300 net/core/sock_map.c:939 bpf_prog_2c29ac5cdc6b1842+0x42/0x46 bpf_dispatcher_nop_func include/linux/bpf.h:1233 [inline] __bpf_prog_run include/linux/filter.h:660 [inline] bpf_prog_run include/linux/filter.h:674 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2396 [inline] bpf_trace_run6+0x537/0x5f0 kernel/trace/bpf_trace.c:2441 __bpf_trace_ext4_ext_remove_space_done+0x43/0x60 include/trace/events/ext4.h:2128 trace_ext4_ext_remove_space_done include/trace/events/ext4.h:2128 [inline] ext4_ext_remove_space+0x4c1c/0x4e40 fs/ext4/extents.c:3007 ext4_ext_truncate+0x159/0x2b0 fs/ext4/extents.c:4440 ext4_truncate+0xa18/0x1180 fs/ext4/inode.c:4146 ext4_setattr+0x119a/0x1bb0 fs/ext4/inode.c:5454 notify_change+0xb9d/0xe70 fs/attr.c:497 do_truncate+0x220/0x310 fs/open.c:65 handle_truncate fs/namei.c:3300 [inline] do_open fs/namei.c:3646 [inline] path_openat+0x29fe/0x3240 fs/namei.c:3799 do_filp_open+0x235/0x490 fs/namei.c:3826 do_sys_openat2+0x13e/0x1d0 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] __x64_sys_openat+0x247/0x2a0 fs/open.c:1432 do_syscall_64+0xfb/0x240 entry_SYSCALL_64_after_hwframe+0x72/0x7a INITIAL USE at: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline] _raw_spin_lock_bh+0x35/0x50 kernel/locking/spinlock.c:178 spin_lock_bh include/linux/spinlock.h:356 [inline] sock_hash_delete_elem+0xb0/0x300 net/core/sock_map.c:939 bpf_prog_2c29ac5cdc6b1842+0x42/0x46 bpf_dispatcher_nop_func include/linux/bpf.h:1233 [inline] __bpf_prog_run include/linux/filter.h:660 [inline] bpf_prog_run include/linux/filter.h:674 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2396 [inline] bpf_trace_run6+0x537/0x5f0 kernel/trace/bpf_trace.c:2441 __bpf_trace_ext4_ext_remove_space_done+0x43/0x60 include/trace/events/ext4.h:2128 trace_ext4_ext_remove_space_done include/trace/events/ext4.h:2128 [inline] ext4_ext_remove_space+0x4c1c/0x4e40 fs/ext4/extents.c:3007 ext4_ext_truncate+0x159/0x2b0 fs/ext4/extents.c:4440 ext4_truncate+0xa18/0x1180 fs/ext4/inode.c:4146 ext4_setattr+0x119a/0x1bb0 fs/ext4/inode.c:5454 notify_change+0xb9d/0xe70 fs/attr.c:497 do_truncate+0x220/0x310 fs/open.c:65 handle_truncate fs/namei.c:3300 [inline] do_open fs/namei.c:3646 [inline] path_openat+0x29fe/0x3240 fs/namei.c:3799 do_filp_open+0x235/0x490 fs/namei.c:3826 do_sys_openat2+0x13e/0x1d0 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] __x64_sys_openat+0x247/0x2a0 fs/open.c:1432 do_syscall_64+0xfb/0x240 entry_SYSCALL_64_after_hwframe+0x72/0x7a } ... key at: [] sock_hash_alloc.__key+0x0/0x20 ... acquired at: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline] _raw_spin_lock_bh+0x35/0x50 kernel/locking/spinlock.c:178 spin_lock_bh include/linux/spinlock.h:356 [inline] sock_hash_delete_elem+0xb0/0x300 net/core/sock_map.c:939 bpf_prog_2c29ac5cdc6b1842+0x42/0x46 bpf_dispatcher_nop_func include/linux/bpf.h:1233 [inline] __bpf_prog_run include/linux/filter.h:667 [inline] bpf_prog_run include/linux/filter.h:674 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2396 [inline] bpf_trace_run4+0x334/0x580 kernel/trace/bpf_trace.c:2439 __traceiter_sched_switch+0x98/0xd0 include/trace/events/sched.h:222 trace_sched_switch include/trace/events/sched.h:222 [inline] __schedule+0x2587/0x4a50 kernel/sched/core.c:6743 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:7068 irqentry_exit+0x5e/0x90 kernel/entry/common.c:354 asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:707 native_save_fl arch/x86/include/asm/irqflags.h:26 [inline] arch_local_save_flags arch/x86/include/asm/irqflags.h:67 [inline] arch_local_irq_save arch/x86/include/asm/irqflags.h:103 [inline] lock_release+0x16d/0x9f0 kernel/locking/lockdep.c:5770 rcu_lock_release include/linux/rcupdate.h:339 [inline] rcu_read_unlock include/linux/rcupdate.h:872 [inline] batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:412 [inline] batadv_nc_worker+0x28b/0x610 net/batman-adv/network-coding.c:719 process_one_work kernel/workqueue.c:3218 [inline] process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3299 worker_thread+0x86d/0xd70 kernel/workqueue.c:3380 kthread+0x2f0/0x390 kernel/kthread.c:388 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243 stack backtrace: CPU: 0 PID: 35 Comm: kworker/u8:2 Not tainted 6.9.0-rc2-next-20240402-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 Workqueue: bat_events batadv_nc_worker Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114 print_bad_irq_dependency kernel/locking/lockdep.c:2626 [inline] check_irq_usage kernel/locking/lockdep.c:2865 [inline] check_prev_add kernel/locking/lockdep.c:3138 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain+0x4dc7/0x58e0 kernel/locking/lockdep.c:3869 __lock_acquire+0x1346/0x1fd0 kernel/locking/lockdep.c:5137 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline] _raw_spin_lock_bh+0x35/0x50 kernel/locking/spinlock.c:178 spin_lock_bh include/linux/spinlock.h:356 [inline] sock_hash_delete_elem+0xb0/0x300 net/core/sock_map.c:939 bpf_prog_2c29ac5cdc6b1842+0x42/0x46 bpf_dispatcher_nop_func include/linux/bpf.h:1233 [inline] __bpf_prog_run include/linux/filter.h:667 [inline] bpf_prog_run include/linux/filter.h:674 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2396 [inline] bpf_trace_run4+0x334/0x580 kernel/trace/bpf_trace.c:2439 __traceiter_sched_switch+0x98/0xd0 include/trace/events/sched.h:222 trace_sched_switch include/trace/events/sched.h:222 [inline] __schedule+0x2587/0x4a50 kernel/sched/core.c:6743 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:7068 irqentry_exit+0x5e/0x90 kernel/entry/common.c:354 asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:707 RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:32 [inline] RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:67 [inline] RIP: 0010:arch_local_irq_save arch/x86/include/asm/irqflags.h:103 [inline] RIP: 0010:lock_release+0x16d/0x9f0 kernel/locking/lockdep.c:5770 Code: eb 03 42 80 3c 3b 00 74 08 4c 89 f7 e8 dc 47 88 00 4c 89 6c 24 50 48 c7 84 24 b0 00 00 00 00 00 00 00 9c 8f 84 24 b0 00 00 00 <42> 80 3c 3b 00 74 08 4c 89 f7 e8 c4 46 88 00 48 8b 9c 24 b0 00 00 RSP: 0018:ffffc90000ab7a20 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 1ffff92000156f5a RCX: ffffffff817208b0 RDX: 0000000000000000 RSI: ffffffff8c1f7ea0 RDI: ffffffff8c1f7e60 RBP: ffffc90000ab7b48 R08: ffffffff8fa934ef R09: 1ffffffff1f5269d R10: dffffc0000000000 R11: fffffbfff1f5269e R12: 1ffff92000156f50 R13: ffffffff8b4bd96b R14: ffffc90000ab7ad0 R15: dffffc0000000000 rcu_lock_release include/linux/rcupdate.h:339 [inline] rcu_read_unlock include/linux/rcupdate.h:872 [inline] batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:412 [inline] batadv_nc_worker+0x28b/0x610 net/batman-adv/network-coding.c:719 process_one_work kernel/workqueue.c:3218 [inline] process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3299 worker_thread+0x86d/0xd70 kernel/workqueue.c:3380 kthread+0x2f0/0x390 kernel/kthread.c:388 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243 ---------------- Code disassembly (best guess): 0: eb 03 jmp 0x5 2: 42 80 3c 3b 00 cmpb $0x0,(%rbx,%r15,1) 7: 74 08 je 0x11 9: 4c 89 f7 mov %r14,%rdi c: e8 dc 47 88 00 call 0x8847ed 11: 4c 89 6c 24 50 mov %r13,0x50(%rsp) 16: 48 c7 84 24 b0 00 00 movq $0x0,0xb0(%rsp) 1d: 00 00 00 00 00 22: 9c pushf 23: 8f 84 24 b0 00 00 00 pop 0xb0(%rsp) * 2a: 42 80 3c 3b 00 cmpb $0x0,(%rbx,%r15,1) <-- trapping instruction 2f: 74 08 je 0x39 31: 4c 89 f7 mov %r14,%rdi 34: e8 c4 46 88 00 call 0x8846fd 39: 48 rex.W 3a: 8b .byte 0x8b 3b: 9c pushf 3c: 24 b0 and $0xb0,%al