FAULT_INJECTION: forcing a failure.
name fail_usercopy, interval 1, probability 0, space 0, times 0
======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Not tainted
------------------------------------------------------
syz.7.1723/11294 is trying to acquire lock:
ffffffff8cb1eda0 (console_owner){-.-.}-{0:0}, at: console_lock_spinning_enable kernel/printk/printk.c:1818 [inline]
ffffffff8cb1eda0 (console_owner){-.-.}-{0:0}, at: console_emit_next_record+0x82d/0xc90 kernel/printk/printk.c:2774

but task is already holding lock:
ffff8880b8e3aad8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0xa5/0x140 kernel/sched/core.c:545

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #4 (&rq->__lock){-.-.}-{2:2}:
       _raw_spin_lock_nested+0x2e/0x40 kernel/locking/spinlock.c:378
       raw_spin_rq_lock_nested+0x26/0x140 kernel/sched/core.c:537
       raw_spin_rq_lock kernel/sched/sched.h:1355 [inline]
       rq_lock kernel/sched/sched.h:1645 [inline]
       task_fork_fair+0x5c/0x350 kernel/sched/fair.c:11901
       sched_cgroup_fork+0x32c/0x3c0 kernel/sched/core.c:4685
       copy_process+0x24b8/0x4020 kernel/fork.c:2459
       kernel_clone+0x225/0x8b0 kernel/fork.c:2757
       user_mode_thread+0xda/0x130 kernel/fork.c:2833
       rest_init+0x23/0x300 init/main.c:698
       start_kernel+0x0/0x539 init/main.c:893
       start_kernel+0x490/0x539 init/main.c:1140
       secondary_startup_64_no_verify+0xcf/0xdb

-> #3 (&p->pi_lock){-.-.}-{2:2}:
       __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
       _raw_spin_lock_irqsave+0xa4/0xf0 kernel/locking/spinlock.c:162
       try_to_wake_up+0x5c/0x1080 kernel/sched/core.c:4111
       __wake_up_common+0x2a4/0x4e0 kernel/sched/wait.c:107
       __wake_up_common_lock kernel/sched/wait.c:138 [inline]
       __wake_up+0x10e/0x190 kernel/sched/wait.c:160
       tty_port_default_wakeup+0x9e/0xf0 drivers/tty/tty_port.c:71
       serial8250_tx_chars+0x629/0x830 drivers/tty/serial/8250/8250_port.c:1854
       serial8250_handle_irq+0x516/0x6d0 drivers/tty/serial/8250/8250_port.c:1961
       serial8250_default_handle_irq+0xb4/0x1a0 drivers/tty/serial/8250/8250_port.c:1981
       serial8250_interrupt+0x9b/0x1c0 drivers/tty/serial/8250/8250_core.c:126
       __handle_irq_event_percpu+0x298/0xa30 kernel/irq/handle.c:158
       handle_irq_event_percpu kernel/irq/handle.c:193 [inline]
       handle_irq_event+0x87/0x1e0 kernel/irq/handle.c:210
       handle_edge_irq+0x243/0xb20 kernel/irq/chip.c:819
       generic_handle_irq_desc include/linux/irqdesc.h:158 [inline]
       handle_irq arch/x86/kernel/irq.c:233 [inline]
       __common_interrupt+0xd7/0x1e0 arch/x86/kernel/irq.c:252
       common_interrupt+0xb0/0xd0 arch/x86/kernel/irq.c:242
       asm_common_interrupt+0x22/0x40 arch/x86/include/asm/idtentry.h:682
       unwind_next_frame+0xb3d/0x20b0 arch/x86/kernel/unwind_orc.c:544
       arch_stack_walk+0x10c/0x140 arch/x86/kernel/stacktrace.c:25
       stack_trace_save+0x98/0xe0 kernel/stacktrace.c:122
       save_stack+0xf3/0x1e0 mm/page_owner.c:127
       __set_page_owner+0x19/0x60 mm/page_owner.c:190
       set_page_owner include/linux/page_owner.h:31 [inline]
       post_alloc_hook+0x173/0x1a0 mm/page_alloc.c:2532
       prep_new_page mm/page_alloc.c:2539 [inline]
       get_page_from_freelist+0x1a26/0x1ac0 mm/page_alloc.c:4328
       __alloc_pages+0x1df/0x4e0 mm/page_alloc.c:5614
       alloc_slab_page+0x5d/0x160 mm/slub.c:1799
       allocate_slab mm/slub.c:1944 [inline]
       new_slab+0x87/0x2c0 mm/slub.c:1997
       ___slab_alloc+0xbc6/0x1230 mm/slub.c:3154
       kmem_cache_alloc_bulk+0x1a3/0x4e0 mm/slub.c:3856
       mt_alloc_bulk lib/maple_tree.c:157 [inline]
       mas_alloc_nodes+0x449/0x890 lib/maple_tree.c:1299
       mas_node_count_gfp lib/maple_tree.c:1359 [inline]
       mas_preallocate+0x161/0x3c0 lib/maple_tree.c:5807
       __mmap_region mm/mmap.c:2765 [inline]
       mmap_region+0xd8a/0x1c70 mm/mmap.c:2916
       do_mmap+0x958/0xfd0 mm/mmap.c:1436
       vm_mmap_pgoff+0x1b2/0x2b0 mm/util.c:520
       ksys_mmap_pgoff+0x516/0x6f0 mm/mmap.c:1482
       do_syscall_x64 arch/x86/entry/common.c:51 [inline]
       do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
       entry_SYSCALL_64_after_hwframe+0x68/0xd2

-> #2 (&tty->write_wait){-.-.}-{2:2}:
       __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
       _raw_spin_lock_irqsave+0xa4/0xf0 kernel/locking/spinlock.c:162
       __wake_up_common_lock kernel/sched/wait.c:137 [inline]
       __wake_up+0xf4/0x190 kernel/sched/wait.c:160
       tty_port_default_wakeup+0x9e/0xf0 drivers/tty/tty_port.c:71
       serial8250_tx_chars+0x629/0x830 drivers/tty/serial/8250/8250_port.c:1854
       serial8250_handle_irq+0x516/0x6d0 drivers/tty/serial/8250/8250_port.c:1961
       serial8250_default_handle_irq+0xb4/0x1a0 drivers/tty/serial/8250/8250_port.c:1981
       serial8250_interrupt+0x9b/0x1c0 drivers/tty/serial/8250/8250_core.c:126
       __handle_irq_event_percpu+0x298/0xa30 kernel/irq/handle.c:158
       handle_irq_event_percpu kernel/irq/handle.c:193 [inline]
       handle_irq_event+0x87/0x1e0 kernel/irq/handle.c:210
       handle_edge_irq+0x243/0xb20 kernel/irq/chip.c:819
       generic_handle_irq_desc include/linux/irqdesc.h:158 [inline]
       handle_irq arch/x86/kernel/irq.c:233 [inline]
       __common_interrupt+0xd7/0x1e0 arch/x86/kernel/irq.c:252
       common_interrupt+0xb0/0xd0 arch/x86/kernel/irq.c:242
       asm_common_interrupt+0x22/0x40 arch/x86/include/asm/idtentry.h:682
       native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline]
       arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline]
       default_idle+0xb/0x10 arch/x86/kernel/process.c:741
       default_idle_call+0x84/0xc0 kernel/sched/idle.c:109
       cpuidle_idle_call kernel/sched/idle.c:191 [inline]
       do_idle+0x1fc/0x570 kernel/sched/idle.c:303
       cpu_startup_entry+0x3f/0x60 kernel/sched/idle.c:401
       start_secondary+0xe4/0xf0 arch/x86/kernel/smpboot.c:281
       secondary_startup_64_no_verify+0xcf/0xdb

-> #1 (&port_lock_key){-.-.}-{2:2}:
       __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
       _raw_spin_lock_irqsave+0xa4/0xf0 kernel/locking/spinlock.c:162
       serial8250_console_write+0x169/0x17a0 drivers/tty/serial/8250/8250_port.c:3432
       call_console_driver kernel/printk/printk.c:1977 [inline]
       console_emit_next_record+0x947/0xc90 kernel/printk/printk.c:2777
       console_flush_all kernel/printk/printk.c:-1 [inline]
       console_unlock+0x223/0x630 kernel/printk/printk.c:2906
       vprintk_emit+0x489/0x680 kernel/printk/printk.c:2303
       _printk+0xcc/0x110 kernel/printk/printk.c:2328
       register_console+0x6c6/0x9c0 kernel/printk/printk.c:3269
       univ8250_console_init+0x41/0x43 drivers/tty/serial/8250/8250_core.c:687
       console_init+0x1bc/0x78e kernel/printk/printk.c:3359
       start_kernel+0x303/0x539 init/main.c:1076
       secondary_startup_64_no_verify+0xcf/0xdb

-> #0 (console_owner){-.-.}-{0:0}:
       check_prev_add kernel/locking/lockdep.c:3090 [inline]
       check_prevs_add kernel/locking/lockdep.c:3209 [inline]
       validate_chain kernel/locking/lockdep.c:3825 [inline]
       __lock_acquire+0x2cf8/0x7c50 kernel/locking/lockdep.c:5049
       lock_acquire+0x1b4/0x490 kernel/locking/lockdep.c:5662
       console_lock_spinning_enable kernel/printk/printk.c:1818 [inline]
       console_emit_next_record+0x84c/0xc90 kernel/printk/printk.c:2774
       console_flush_all kernel/printk/printk.c:-1 [inline]
       console_unlock+0x223/0x630 kernel/printk/printk.c:2906
       vprintk_emit+0x489/0x680 kernel/printk/printk.c:2303
       _printk+0xcc/0x110 kernel/printk/printk.c:2328
       fail_dump lib/fault-inject.c:45 [inline]
       should_fail_ex+0x37a/0x4d0 lib/fault-inject.c:147
       strncpy_from_user+0x32/0x350 lib/strncpy_from_user.c:118
       strncpy_from_user_nofault+0x6d/0x140 mm/maccess.c:186
       bpf_trace_copy_string kernel/bpf/helpers.c:746 [inline]
       bpf_bprintf_prepare+0xba0/0x13d0 kernel/bpf/helpers.c:971
       ____bpf_trace_printk kernel/trace/bpf_trace.c:384 [inline]
       bpf_trace_printk+0xd8/0x190 kernel/trace/bpf_trace.c:374
       bpf_prog_7c77c7e0f6645ad8+0x35/0x37
       bpf_dispatcher_nop_func include/linux/bpf.h:1011 [inline]
       __bpf_prog_run include/linux/filter.h:603 [inline]
       bpf_prog_run include/linux/filter.h:610 [inline]
       __bpf_trace_run kernel/trace/bpf_trace.c:2285 [inline]
       bpf_trace_run2+0x1cd/0x3b0 kernel/trace/bpf_trace.c:2324
       trace_contention_begin+0x142/0x190 include/trace/events/lock.h:95
       __pv_queued_spin_lock_slowpath+0xdc/0x9c0 kernel/locking/qspinlock.c:405
       pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:591 [inline]
       queued_spin_lock_slowpath+0x43/0x50 arch/x86/include/asm/qspinlock.h:51
       queued_spin_lock include/asm-generic/qspinlock.h:114 [inline]
       do_raw_spin_lock+0x217/0x280 kernel/locking/spinlock_debug.c:115
       raw_spin_rq_lock_nested+0xa5/0x140 kernel/sched/core.c:545
       raw_spin_rq_lock kernel/sched/sched.h:1355 [inline]
       rq_lock kernel/sched/sched.h:1645 [inline]
       __schedule+0x2ed/0x40b0 kernel/sched/core.c:6477
       preempt_schedule_irq+0xb1/0x150 kernel/sched/core.c:6873
       irqentry_exit+0x63/0x70 kernel/entry/common.c:439
       asm_sysvec_reschedule_ipi+0x16/0x20 arch/x86/include/asm/idtentry.h:696
       preempt_count_add+0x2e/0x190 kernel/sched/core.c:5705
       unwind_next_frame+0xaf/0x20b0 arch/x86/kernel/unwind_orc.c:433
       arch_stack_walk+0x10c/0x140 arch/x86/kernel/stacktrace.c:25
       stack_trace_save+0x98/0xe0 kernel/stacktrace.c:122
       kasan_save_stack mm/kasan/common.c:45 [inline]
       kasan_set_track+0x4b/0x70 mm/kasan/common.c:52
       ____kasan_kmalloc mm/kasan/common.c:374 [inline]
       __kasan_kmalloc+0x8e/0xa0 mm/kasan/common.c:383
       kasan_kmalloc include/linux/kasan.h:211 [inline]
       __do_kmalloc_node mm/slab_common.c:936 [inline]
       __kmalloc+0xb0/0x240 mm/slab_common.c:949
       kmalloc include/linux/slab.h:568 [inline]
       kzalloc include/linux/slab.h:699 [inline]
       bpf_test_init net/bpf/test_run.c:775 [inline]
       bpf_prog_test_run_skb+0x22b/0x11b0 net/bpf/test_run.c:1100
       bpf_prog_test_run+0x31e/0x390 kernel/bpf/syscall.c:3692
       __sys_bpf+0x593/0x6d0 kernel/bpf/syscall.c:5045
       __do_sys_bpf kernel/bpf/syscall.c:5131 [inline]
       __se_sys_bpf kernel/bpf/syscall.c:5129 [inline]
       __x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:5129
       do_syscall_x64 arch/x86/entry/common.c:51 [inline]
       do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
       entry_SYSCALL_64_after_hwframe+0x68/0xd2

other info that might help us debug this:

Chain exists of:
  console_owner --> &p->pi_lock --> &rq->__lock

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&rq->__lock);
                               lock(&p->pi_lock);
                               lock(&rq->__lock);
  lock(console_owner);

 *** DEADLOCK ***

3 locks held by syz.7.1723/11294:
 #0: ffff8880b8e3aad8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0xa5/0x140 kernel/sched/core.c:545
 #1: ffffffff8cb2abe0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline]
 #1: ffffffff8cb2abe0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:791 [inline]
 #1: ffffffff8cb2abe0 (rcu_read_lock){....}-{1:2}, at: __bpf_trace_run kernel/trace/bpf_trace.c:2284 [inline]
 #1: ffffffff8cb2abe0 (rcu_read_lock){....}-{1:2}, at: bpf_trace_run2+0xda/0x3b0 kernel/trace/bpf_trace.c:2324
 #2: ffffffff8cb1ee80 (console_lock){+.+.}-{0:0}, at: _printk+0xcc/0x110 kernel/printk/printk.c:2328

stack backtrace:
CPU: 0 PID: 11294 Comm: syz.7.1723 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0x168/0x22e lib/dump_stack.c:106
 check_noncircular+0x274/0x310 kernel/locking/lockdep.c:2170
 check_prev_add kernel/locking/lockdep.c:3090 [inline]
 check_prevs_add kernel/locking/lockdep.c:3209 [inline]
 validate_chain kernel/locking/lockdep.c:3825 [inline]
 __lock_acquire+0x2cf8/0x7c50 kernel/locking/lockdep.c:5049
 lock_acquire+0x1b4/0x490 kernel/locking/lockdep.c:5662
 console_lock_spinning_enable kernel/printk/printk.c:1818 [inline]
 console_emit_next_record+0x84c/0xc90 kernel/printk/printk.c:2774
 console_flush_all kernel/printk/printk.c:-1 [inline]
 console_unlock+0x223/0x630 kernel/printk/printk.c:2906
 vprintk_emit+0x489/0x680 kernel/printk/printk.c:2303
 _printk+0xcc/0x110 kernel/printk/printk.c:2328
 fail_dump lib/fault-inject.c:45 [inline]
 should_fail_ex+0x37a/0x4d0 lib/fault-inject.c:147
 strncpy_from_user+0x32/0x350 lib/strncpy_from_user.c:118
 strncpy_from_user_nofault+0x6d/0x140 mm/maccess.c:186
 bpf_trace_copy_string kernel/bpf/helpers.c:746 [inline]
 bpf_bprintf_prepare+0xba0/0x13d0 kernel/bpf/helpers.c:971
 ____bpf_trace_printk kernel/trace/bpf_trace.c:384 [inline]
 bpf_trace_printk+0xd8/0x190 kernel/trace/bpf_trace.c:374
 bpf_prog_7c77c7e0f6645ad8+0x35/0x37
 bpf_dispatcher_nop_func include/linux/bpf.h:1011 [inline]
 __bpf_prog_run include/linux/filter.h:603 [inline]
 bpf_prog_run include/linux/filter.h:610 [inline]
 __bpf_trace_run kernel/trace/bpf_trace.c:2285 [inline]
 bpf_trace_run2+0x1cd/0x3b0 kernel/trace/bpf_trace.c:2324
 trace_contention_begin+0x142/0x190 include/trace/events/lock.h:95
 __pv_queued_spin_lock_slowpath+0xdc/0x9c0 kernel/locking/qspinlock.c:405
 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:591 [inline]
 queued_spin_lock_slowpath+0x43/0x50 arch/x86/include/asm/qspinlock.h:51
 queued_spin_lock include/asm-generic/qspinlock.h:114 [inline]
 do_raw_spin_lock+0x217/0x280 kernel/locking/spinlock_debug.c:115
 raw_spin_rq_lock_nested+0xa5/0x140 kernel/sched/core.c:545
 raw_spin_rq_lock kernel/sched/sched.h:1355 [inline]
 rq_lock kernel/sched/sched.h:1645 [inline]
 __schedule+0x2ed/0x40b0 kernel/sched/core.c:6477
 preempt_schedule_irq+0xb1/0x150 kernel/sched/core.c:6873
 irqentry_exit+0x63/0x70 kernel/entry/common.c:439
 asm_sysvec_reschedule_ipi+0x16/0x20 arch/x86/include/asm/idtentry.h:696
RIP: 0010:preempt_count_add+0x2e/0x190 kernel/sched/core.c:5705
Code: 53 49 bf 00 00 00 00 00 fc ff df 48 c7 c0 40 91 be 96 48 c1 e8 03 42 0f b6 04 38 84 c0 0f 85 eb 00 00 00 83 3d 62 dc 66 15 00 <75> 07 65 8b 05 61 ba aa 7e 65 01 3d 5a ba aa 7e 48 c7 c0 40 91 be
RSP: 0018:ffffc9000555f790 EFLAGS: 00000246
RAX: 0000000000000004 RBX: ffffc9000555f888 RCX: ffffffff96be9103
RDX: dffffc0000000000 RSI: ffffffff818e91a8 RDI: 0000000000000001
RBP: ffffc9000555f8d0 R08: ffffc9000555f950 R09: 0000000000000006
R10: fffff52000aabf1d R11: 1ffff92000aabf1b R12: ffffffff818e91a8
R13: ffffc9000555fef8 R14: dffffc0000000000 R15: dffffc0000000000
 unwind_next_frame+0xaf/0x20b0 arch/x86/kernel/unwind_orc.c:433
 arch_stack_walk+0x10c/0x140 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x98/0xe0 kernel/stacktrace.c:122
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:52
 ____kasan_kmalloc mm/kasan/common.c:374 [inline]
 __kasan_kmalloc+0x8e/0xa0 mm/kasan/common.c:383
 kasan_kmalloc include/linux/kasan.h:211 [inline]
 __do_kmalloc_node mm/slab_common.c:936 [inline]
 __kmalloc+0xb0/0x240 mm/slab_common.c:949
 kmalloc include/linux/slab.h:568 [inline]
 kzalloc include/linux/slab.h:699 [inline]
 bpf_test_init net/bpf/test_run.c:775 [inline]
 bpf_prog_test_run_skb+0x22b/0x11b0 net/bpf/test_run.c:1100
 bpf_prog_test_run+0x31e/0x390 kernel/bpf/syscall.c:3692
 __sys_bpf+0x593/0x6d0 kernel/bpf/syscall.c:5045
 __do_sys_bpf kernel/bpf/syscall.c:5131 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5129 [inline]
 __x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:5129
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f8207b8eba9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f8208a90038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f8207dd5fa0 RCX: 00007f8207b8eba9
RDX: 0000000000000050 RSI: 00002000000004c0 RDI: 000000000000000a
RBP: 00007f8208a90090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007f8207dd6038 R14: 00007f8207dd5fa0 R15: 00007ffe70b8ba98
 </TASK>
CPU: 0 PID: 11294 Comm: syz.7.1723 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0x168/0x22e lib/dump_stack.c:106
 fail_dump lib/fault-inject.c:52 [inline]
 should_fail_ex+0x399/0x4d0 lib/fault-inject.c:147
 strncpy_from_user+0x32/0x350 lib/strncpy_from_user.c:118
 strncpy_from_user_nofault+0x6d/0x140 mm/maccess.c:186
 bpf_trace_copy_string kernel/bpf/helpers.c:746 [inline]
 bpf_bprintf_prepare+0xba0/0x13d0 kernel/bpf/helpers.c:971
 ____bpf_trace_printk kernel/trace/bpf_trace.c:384 [inline]
 bpf_trace_printk+0xd8/0x190 kernel/trace/bpf_trace.c:374
 bpf_prog_7c77c7e0f6645ad8+0x35/0x37
 bpf_dispatcher_nop_func include/linux/bpf.h:1011 [inline]
 __bpf_prog_run include/linux/filter.h:603 [inline]
 bpf_prog_run include/linux/filter.h:610 [inline]
 __bpf_trace_run kernel/trace/bpf_trace.c:2285 [inline]
 bpf_trace_run2+0x1cd/0x3b0 kernel/trace/bpf_trace.c:2324
 trace_contention_begin+0x142/0x190 include/trace/events/lock.h:95
 __pv_queued_spin_lock_slowpath+0xdc/0x9c0 kernel/locking/qspinlock.c:405
 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:591 [inline]
 queued_spin_lock_slowpath+0x43/0x50 arch/x86/include/asm/qspinlock.h:51
 queued_spin_lock include/asm-generic/qspinlock.h:114 [inline]
 do_raw_spin_lock+0x217/0x280 kernel/locking/spinlock_debug.c:115
 raw_spin_rq_lock_nested+0xa5/0x140 kernel/sched/core.c:545
 raw_spin_rq_lock kernel/sched/sched.h:1355 [inline]
 rq_lock kernel/sched/sched.h:1645 [inline]
 __schedule+0x2ed/0x40b0 kernel/sched/core.c:6477
 preempt_schedule_irq+0xb1/0x150 kernel/sched/core.c:6873
 irqentry_exit+0x63/0x70 kernel/entry/common.c:439
 asm_sysvec_reschedule_ipi+0x16/0x20 arch/x86/include/asm/idtentry.h:696
RIP: 0010:preempt_count_add+0x2e/0x190 kernel/sched/core.c:5705
Code: 53 49 bf 00 00 00 00 00 fc ff df 48 c7 c0 40 91 be 96 48 c1 e8 03 42 0f b6 04 38 84 c0 0f 85 eb 00 00 00 83 3d 62 dc 66 15 00 <75> 07 65 8b 05 61 ba aa 7e 65 01 3d 5a ba aa 7e 48 c7 c0 40 91 be
RSP: 0018:ffffc9000555f790 EFLAGS: 00000246
RAX: 0000000000000004 RBX: ffffc9000555f888 RCX: ffffffff96be9103
RDX: dffffc0000000000 RSI: ffffffff818e91a8 RDI: 0000000000000001
RBP: ffffc9000555f8d0 R08: ffffc9000555f950 R09: 0000000000000006
R10: fffff52000aabf1d R11: 1ffff92000aabf1b R12: ffffffff818e91a8
R13: ffffc9000555fef8 R14: dffffc0000000000 R15: dffffc0000000000
 unwind_next_frame+0xaf/0x20b0 arch/x86/kernel/unwind_orc.c:433
 arch_stack_walk+0x10c/0x140 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x98/0xe0 kernel/stacktrace.c:122
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:52
 ____kasan_kmalloc mm/kasan/common.c:374 [inline]
 __kasan_kmalloc+0x8e/0xa0 mm/kasan/common.c:383
 kasan_kmalloc include/linux/kasan.h:211 [inline]
 __do_kmalloc_node mm/slab_common.c:936 [inline]
 __kmalloc+0xb0/0x240 mm/slab_common.c:949
 kmalloc include/linux/slab.h:568 [inline]
 kzalloc include/linux/slab.h:699 [inline]
 bpf_test_init net/bpf/test_run.c:775 [inline]
 bpf_prog_test_run_skb+0x22b/0x11b0 net/bpf/test_run.c:1100
 bpf_prog_test_run+0x31e/0x390 kernel/bpf/syscall.c:3692
 __sys_bpf+0x593/0x6d0 kernel/bpf/syscall.c:5045
 __do_sys_bpf kernel/bpf/syscall.c:5131 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5129 [inline]
 __x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:5129
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f8207b8eba9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f8208a90038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f8207dd5fa0 RCX: 00007f8207b8eba9
RDX: 0000000000000050 RSI: 00002000000004c0 RDI: 000000000000000a
RBP: 00007f8208a90090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007f8207dd6038 R14: 00007f8207dd5fa0 R15: 00007ffe70b8ba98
 </TASK>
----------------
Code disassembly (best guess):
   0:	53                   	push   %rbx
   1:	49 bf 00 00 00 00 00 	movabs $0xdffffc0000000000,%r15
   8:	fc ff df
   b:	48 c7 c0 40 91 be 96 	mov    $0xffffffff96be9140,%rax
  12:	48 c1 e8 03          	shr    $0x3,%rax
  16:	42 0f b6 04 38       	movzbl (%rax,%r15,1),%eax
  1b:	84 c0                	test   %al,%al
  1d:	0f 85 eb 00 00 00    	jne    0x10e
  23:	83 3d 62 dc 66 15 00 	cmpl   $0x0,0x1566dc62(%rip)        # 0x1566dc8c
* 2a:	75 07                	jne    0x33 <-- trapping instruction
  2c:	65 8b 05 61 ba aa 7e 	mov    %gs:0x7eaaba61(%rip),%eax        # 0x7eaaba94
  33:	65 01 3d 5a ba aa 7e 	add    %edi,%gs:0x7eaaba5a(%rip)        # 0x7eaaba94
  3a:	48                   	rex.W
  3b:	c7                   	.byte 0xc7
  3c:	c0 40 91 be          	rolb   $0xbe,-0x6f(%rax)