FAULT_INJECTION: forcing a failure.
name fail_usercopy, interval 1, probability 0, space 0, times 1
======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Not tainted
------------------------------------------------------
syz.4.21/6525 is trying to acquire lock:
ffffffff8e7526c0 (console_owner){....}-{0:0}, at: rcu_try_lock_acquire include/linux/rcupdate.h:317 [inline]
ffffffff8e7526c0 (console_owner){....}-{0:0}, at: srcu_read_lock_nmisafe include/linux/srcu.h:428 [inline]
ffffffff8e7526c0 (console_owner){....}-{0:0}, at: console_srcu_read_lock kernel/printk/printk.c:291 [inline]
ffffffff8e7526c0 (console_owner){....}-{0:0}, at: console_flush_one_record kernel/printk/printk.c:3246 [inline]
ffffffff8e7526c0 (console_owner){....}-{0:0}, at: console_flush_all+0x123/0xb20 kernel/printk/printk.c:3343

but task is already holding lock:
ffff8880b863ade0 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x31/0x150 kernel/sched/core.c:647

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+0x32/0x50 kernel/locking/spinlock.c:378
       raw_spin_rq_lock_nested+0x31/0x150 kernel/sched/core.c:647
       raw_spin_rq_lock kernel/sched/sched.h:1615 [inline]
       _task_rq_lock+0xbc/0x470 kernel/sched/core.c:747
       cgroup_move_task+0x9a/0x2b0 kernel/sched/psi.c:1170
       css_set_move_task+0x658/0x9e0 kernel/cgroup/cgroup.c:948
       cgroup_post_fork+0x214/0x910 kernel/cgroup/cgroup.c:6910
       copy_process+0x39b6/0x3cf0 kernel/fork.c:2467
       kernel_clone+0x248/0x8e0 kernel/fork.c:2654
       user_mode_thread+0x110/0x180 kernel/fork.c:2730
       rest_init+0x23/0x300 init/main.c:725
       start_kernel+0x385/0x3d0 init/main.c:1210
       x86_64_start_reservations+0x24/0x30 arch/x86/kernel/head64.c:310
       x86_64_start_kernel+0x143/0x1c0 arch/x86/kernel/head64.c:291
       common_startup_64+0x13e/0x147

-> #3 (&p->pi_lock){-.-.}-{2:2}:
       __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:132 [inline]
       _raw_spin_lock_irqsave+0x40/0x60 kernel/locking/spinlock.c:162
       class_raw_spinlock_irqsave_constructor include/linux/spinlock.h:570 [inline]
       try_to_wake_up+0x66/0x1390 kernel/sched/core.c:4130
       __wake_up_common kernel/sched/wait.c:108 [inline]
       __wake_up_common_lock+0x137/0x1f0 kernel/sched/wait.c:125
       tty_port_default_wakeup+0xfb/0x170 drivers/tty/tty_port.c:67
       serial8250_tx_chars+0x72e/0x970 drivers/tty/serial/8250/8250_port.c:1719
       serial8250_handle_irq+0x633/0xbb0 drivers/tty/serial/8250/8250_port.c:1827
       serial8250_default_handle_irq+0xbf/0x200 drivers/tty/serial/8250/8250_port.c:1846
       serial8250_interrupt+0x8d/0x180 drivers/tty/serial/8250/8250_core.c:86
       __handle_irq_event_percpu+0x227/0x9e0 kernel/irq/handle.c:209
       handle_irq_event_percpu kernel/irq/handle.c:246 [inline]
       handle_irq_event+0x8b/0x1e0 kernel/irq/handle.c:263
       handle_edge_irq+0x23b/0xa10 kernel/irq/chip.c:855
       generic_handle_irq_desc include/linux/irqdesc.h:186 [inline]
       handle_irq arch/x86/kernel/irq.c:262 [inline]
       call_irq_handler arch/x86/kernel/irq.c:-1 [inline]
       __common_interrupt+0x141/0x1f0 arch/x86/kernel/irq.c:333
       common_interrupt+0xb6/0xe0 arch/x86/kernel/irq.c:326
       asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:688
       lock_acquire+0x20b/0x2e0 kernel/locking/lockdep.c:5872
       rcu_lock_acquire include/linux/rcupdate.h:312 [inline]
       rcu_read_lock include/linux/rcupdate.h:850 [inline]
       class_rcu_constructor include/linux/rcupdate.h:1193 [inline]
       unwind_next_frame+0xc2/0x23c0 arch/x86/kernel/unwind_orc.c:495
       arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25
       stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122
       kasan_save_stack mm/kasan/common.c:57 [inline]
       kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
       unpoison_slab_object mm/kasan/common.c:340 [inline]
       __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:366
       kasan_slab_alloc include/linux/kasan.h:253 [inline]
       slab_post_alloc_hook mm/slub.c:4501 [inline]
       slab_alloc_node mm/slub.c:4830 [inline]
       kmem_cache_alloc_noprof+0x2bc/0x650 mm/slub.c:4837
       vm_area_alloc+0x24/0x140 mm/vma_init.c:32
       __install_special_mapping mm/mmap.c:1460 [inline]
       _install_special_mapping+0x2e/0x350 mm/mmap.c:1510
       map_vdso+0x1d6/0x470 arch/x86/entry/vdso/vma.c:155
       load_elf_binary+0x1d81/0x2980 fs/binfmt_elf.c:1291
       search_binary_handler fs/exec.c:1664 [inline]
       exec_binprm fs/exec.c:1696 [inline]
       bprm_execve+0x93d/0x1460 fs/exec.c:1748
       do_execveat_common+0x50d/0x690 fs/exec.c:1846
       __do_sys_execve fs/exec.c:1930 [inline]
       __se_sys_execve fs/exec.c:1924 [inline]
       __x64_sys_execve+0x97/0xc0 fs/exec.c:1924
       do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
       do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #2 (&tty->write_wait){-.-.}-{3:3}:
       __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:132 [inline]
       _raw_spin_lock_irqsave+0x40/0x60 kernel/locking/spinlock.c:162
       __wake_up_common_lock+0x2f/0x1f0 kernel/sched/wait.c:124
       tty_port_default_wakeup+0xfb/0x170 drivers/tty/tty_port.c:67
       serial8250_tx_chars+0x72e/0x970 drivers/tty/serial/8250/8250_port.c:1719
       serial8250_handle_irq+0x633/0xbb0 drivers/tty/serial/8250/8250_port.c:1827
       serial8250_default_handle_irq+0xbf/0x200 drivers/tty/serial/8250/8250_port.c:1846
       serial8250_interrupt+0x8d/0x180 drivers/tty/serial/8250/8250_core.c:86
       __handle_irq_event_percpu+0x227/0x9e0 kernel/irq/handle.c:209
       handle_irq_event_percpu kernel/irq/handle.c:246 [inline]
       handle_irq_event+0x8b/0x1e0 kernel/irq/handle.c:263
       handle_edge_irq+0x23b/0xa10 kernel/irq/chip.c:855
       generic_handle_irq_desc include/linux/irqdesc.h:186 [inline]
       handle_irq arch/x86/kernel/irq.c:262 [inline]
       call_irq_handler arch/x86/kernel/irq.c:-1 [inline]
       __common_interrupt+0x141/0x1f0 arch/x86/kernel/irq.c:333
       common_interrupt+0xb6/0xe0 arch/x86/kernel/irq.c:326
       asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:688
       __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:179 [inline]
       _raw_spin_unlock_irqrestore+0x47/0x80 kernel/locking/spinlock.c:194
       spin_unlock_irqrestore include/linux/spinlock.h:407 [inline]
       uart_port_unlock_irqrestore include/linux/serial_core.h:788 [inline]
       uart_port_unlock_deref drivers/tty/serial/serial_core.c:91 [inline]
       uart_write+0x3de/0xa10 drivers/tty/serial/serial_core.c:634
       process_output_block drivers/tty/n_tty.c:557 [inline]
       n_tty_write+0xd84/0x12a0 drivers/tty/n_tty.c:2366
       iterate_tty_write drivers/tty/tty_io.c:1006 [inline]
       file_tty_write+0x559/0xa20 drivers/tty/tty_io.c:1081
       new_sync_write fs/read_write.c:595 [inline]
       vfs_write+0x61d/0xb90 fs/read_write.c:688
       ksys_write+0x150/0x270 fs/read_write.c:740
       do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
       do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #1 (&port_lock_key){-.-.}-{3:3}:
       __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:132 [inline]
       _raw_spin_lock_irqsave+0x40/0x60 kernel/locking/spinlock.c:162
       uart_port_lock_irqsave include/linux/serial_core.h:717 [inline]
       serial8250_console_write+0x150/0x1ba0 drivers/tty/serial/8250/8250_port.c:3301
       console_emit_next_record kernel/printk/printk.c:3183 [inline]
       console_flush_one_record kernel/printk/printk.c:3269 [inline]
       console_flush_all+0x718/0xb20 kernel/printk/printk.c:3343
       __console_flush_and_unlock kernel/printk/printk.c:3373 [inline]
       console_unlock+0xd1/0x1c0 kernel/printk/printk.c:3413
       vprintk_emit+0x485/0x560 kernel/printk/printk.c:2479
       _printk+0xdd/0x130 kernel/printk/printk.c:2504
       register_console+0xbc2/0xfa0 kernel/printk/printk.c:4208
       univ8250_console_init+0x3a/0x70 drivers/tty/serial/8250/8250_core.c:515
       console_init+0x10b/0x4d0 kernel/printk/printk.c:4407
       start_kernel+0x22b/0x3d0 init/main.c:1147
       x86_64_start_reservations+0x24/0x30 arch/x86/kernel/head64.c:310
       x86_64_start_kernel+0x143/0x1c0 arch/x86/kernel/head64.c:291
       common_startup_64+0x13e/0x147

-> #0 (console_owner){....}-{0:0}:
       check_prev_add kernel/locking/lockdep.c:3165 [inline]
       check_prevs_add kernel/locking/lockdep.c:3284 [inline]
       validate_chain kernel/locking/lockdep.c:3908 [inline]
       __lock_acquire+0x15a5/0x2cf0 kernel/locking/lockdep.c:5237
       lock_acquire+0xf0/0x2e0 kernel/locking/lockdep.c:5868
       console_lock_spinning_enable kernel/printk/printk.c:1902 [inline]
       console_emit_next_record kernel/printk/printk.c:3177 [inline]
       console_flush_one_record kernel/printk/printk.c:3269 [inline]
       console_flush_all+0x6c1/0xb20 kernel/printk/printk.c:3343
       __console_flush_and_unlock kernel/printk/printk.c:3373 [inline]
       console_unlock+0xd1/0x1c0 kernel/printk/printk.c:3413
       vprintk_emit+0x485/0x560 kernel/printk/printk.c:2479
       _printk+0xdd/0x130 kernel/printk/printk.c:2504
       fail_dump lib/fault-inject.c:66 [inline]
       should_fail_ex+0x3f3/0x560 lib/fault-inject.c:174
       strncpy_from_user+0x36/0x2b0 lib/strncpy_from_user.c:118
       strncpy_from_user_nofault+0x71/0x150 mm/maccess.c:192
       bpf_probe_read_user_str_common kernel/trace/bpf_trace.c:214 [inline]
       ____bpf_probe_read_compat_str kernel/trace/bpf_trace.c:309 [inline]
       bpf_probe_read_compat_str+0xe1/0x180 kernel/trace/bpf_trace.c:305
       bpf_prog_90df569eec4aaf11+0x70/0x76
       bpf_dispatcher_nop_func include/linux/bpf.h:1402 [inline]
       __bpf_prog_run include/linux/filter.h:723 [inline]
       bpf_prog_run include/linux/filter.h:730 [inline]
       __bpf_trace_run kernel/trace/bpf_trace.c:2088 [inline]
       bpf_trace_run2+0x371/0x840 kernel/trace/bpf_trace.c:2129
       __bpf_trace_tlb_flush+0x11d/0x170 include/trace/events/tlb.h:39
       __do_trace_tlb_flush include/trace/events/tlb.h:39 [inline]
       trace_tlb_flush+0x132/0x170 include/trace/events/tlb.h:39
       switch_mm_irqs_off+0x472/0x690 arch/x86/mm/tlb.c:-1
       context_switch kernel/sched/core.c:5274 [inline]
       __schedule+0x10bc/0x5340 kernel/sched/core.c:6907
       preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7234
       irqentry_exit+0x599/0x620 kernel/entry/common.c:239
       asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
       __sanitizer_cov_trace_const_cmp4+0x8/0x90 kernel/kcov.c:315
       __smp_text_poke_batch_add arch/x86/kernel/alternative.c:3077 [inline]
       smp_text_poke_batch_add+0x29a/0xa80 arch/x86/kernel/alternative.c:3179
       arch_jump_label_transform_queue+0x8b/0x110 arch/x86/kernel/jump_label.c:138
       __jump_label_update+0x185/0x380 kernel/jump_label.c:513
       static_key_slow_inc_cpuslocked+0x86/0x120 kernel/jump_label.c:168
       static_key_slow_inc+0x1a/0x30 kernel/jump_label.c:191
       bpf_enable_runtime_stats kernel/bpf/syscall.c:5995 [inline]
       bpf_enable_stats+0x101/0x140 kernel/bpf/syscall.c:6014
       __sys_bpf+0x722/0x950 kernel/bpf/syscall.c:6311
       __do_sys_bpf kernel/bpf/syscall.c:6341 [inline]
       __se_sys_bpf kernel/bpf/syscall.c:6339 [inline]
       __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:6339
       do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
       do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

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 ***

8 locks held by syz.4.21/6525:
 #0: ffffffff8e7ecd88 (bpf_stats_enabled_mutex){+.+.}-{4:4}, at: bpf_enable_runtime_stats kernel/bpf/syscall.c:5985 [inline]
 #0: ffffffff8e7ecd88 (bpf_stats_enabled_mutex){+.+.}-{4:4}, at: bpf_enable_stats+0x94/0x140 kernel/bpf/syscall.c:6014
 #1: ffffffff8e5ef3d0 (cpu_hotplug_lock){++++}-{0:0}, at: static_key_slow_inc+0x12/0x30 kernel/jump_label.c:190
 #2: ffffffff8e82de68 (jump_label_mutex){+.+.}-{4:4}, at: class_mutex_constructor include/linux/mutex.h:253 [inline]
 #2: ffffffff8e82de68 (jump_label_mutex){+.+.}-{4:4}, at: static_key_slow_inc_cpuslocked+0x3b/0x120 kernel/jump_label.c:165
 #3: ffffffff8e604ca8 (text_mutex){+.+.}-{4:4}, at: arch_jump_label_transform_queue+0x5f/0x110 arch/x86/kernel/jump_label.c:136
 #4: ffff8880b863ade0 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x31/0x150 kernel/sched/core.c:647
 #5: ffffffff8e7602e0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:312 [inline]
 #5: ffffffff8e7602e0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:850 [inline]
 #5: ffffffff8e7602e0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock_dont_migrate include/linux/rcupdate.h:992 [inline]
 #5: ffffffff8e7602e0 (rcu_read_lock){....}-{1:3}, at: __bpf_trace_run kernel/trace/bpf_trace.c:2079 [inline]
 #5: ffffffff8e7602e0 (rcu_read_lock){....}-{1:3}, at: bpf_trace_run2+0x1c9/0x840 kernel/trace/bpf_trace.c:2129
 #6: ffffffff8e752720 (console_lock){+.+.}-{0:0}, at: _printk+0xdd/0x130 kernel/printk/printk.c:2504
 #7: ffffffff8e639fd8 (console_srcu){....}-{0:0}, at: rcu_try_lock_acquire include/linux/rcupdate.h:317 [inline]
 #7: ffffffff8e639fd8 (console_srcu){....}-{0:0}, at: srcu_read_lock_nmisafe include/linux/srcu.h:428 [inline]
 #7: ffffffff8e639fd8 (console_srcu){....}-{0:0}, at: console_srcu_read_lock kernel/printk/printk.c:291 [inline]
 #7: ffffffff8e639fd8 (console_srcu){....}-{0:0}, at: console_flush_one_record kernel/printk/printk.c:3246 [inline]
 #7: ffffffff8e639fd8 (console_srcu){....}-{0:0}, at: console_flush_all+0x123/0xb20 kernel/printk/printk.c:3343

stack backtrace:
CPU: 0 UID: 0 PID: 6525 Comm: syz.4.21 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 print_circular_bug+0x2e1/0x300 kernel/locking/lockdep.c:2043
 check_noncircular+0x12e/0x150 kernel/locking/lockdep.c:2175
 check_prev_add kernel/locking/lockdep.c:3165 [inline]
 check_prevs_add kernel/locking/lockdep.c:3284 [inline]
 validate_chain kernel/locking/lockdep.c:3908 [inline]
 __lock_acquire+0x15a5/0x2cf0 kernel/locking/lockdep.c:5237
 lock_acquire+0xf0/0x2e0 kernel/locking/lockdep.c:5868
 console_lock_spinning_enable kernel/printk/printk.c:1902 [inline]
 console_emit_next_record kernel/printk/printk.c:3177 [inline]
 console_flush_one_record kernel/printk/printk.c:3269 [inline]
 console_flush_all+0x6c1/0xb20 kernel/printk/printk.c:3343
 __console_flush_and_unlock kernel/printk/printk.c:3373 [inline]
 console_unlock+0xd1/0x1c0 kernel/printk/printk.c:3413
 vprintk_emit+0x485/0x560 kernel/printk/printk.c:2479
 _printk+0xdd/0x130 kernel/printk/printk.c:2504
 fail_dump lib/fault-inject.c:66 [inline]
 should_fail_ex+0x3f3/0x560 lib/fault-inject.c:174
 strncpy_from_user+0x36/0x2b0 lib/strncpy_from_user.c:118
 strncpy_from_user_nofault+0x71/0x150 mm/maccess.c:192
 bpf_probe_read_user_str_common kernel/trace/bpf_trace.c:214 [inline]
 ____bpf_probe_read_compat_str kernel/trace/bpf_trace.c:309 [inline]
 bpf_probe_read_compat_str+0xe1/0x180 kernel/trace/bpf_trace.c:305
 bpf_prog_90df569eec4aaf11+0x70/0x76
 bpf_dispatcher_nop_func include/linux/bpf.h:1402 [inline]
 __bpf_prog_run include/linux/filter.h:723 [inline]
 bpf_prog_run include/linux/filter.h:730 [inline]
 __bpf_trace_run kernel/trace/bpf_trace.c:2088 [inline]
 bpf_trace_run2+0x371/0x840 kernel/trace/bpf_trace.c:2129
 __bpf_trace_tlb_flush+0x11d/0x170 include/trace/events/tlb.h:39
 __do_trace_tlb_flush include/trace/events/tlb.h:39 [inline]
 trace_tlb_flush+0x132/0x170 include/trace/events/tlb.h:39
 switch_mm_irqs_off+0x472/0x690 arch/x86/mm/tlb.c:-1
 context_switch kernel/sched/core.c:5274 [inline]
 __schedule+0x10bc/0x5340 kernel/sched/core.c:6907
 preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7234
 irqentry_exit+0x599/0x620 kernel/entry/common.c:239
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:get_current arch/x86/include/asm/current.h:25 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:245 [inline]
RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x8/0x90 kernel/kcov.c:314
Code: 89 44 11 20 e9 49 19 ea 09 cc 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 04 24 <65> 48 8b 15 08 00 56 11 65 8b 0d 29 00 56 11 81 e1 00 01 ff 00 74
RSP: 0018:ffffc90003827ad8 EFLAGS: 00000246
RAX: ffffffff8bacfefa RBX: ffffc90003827b40 RCX: ffff888028491e40
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90003827c40 R08: ffff888028491e40 R09: 0000000000000003
R10: 0000000000000008 R11: 0000000000000000 R12: 00000000000002c0
R13: ffffffff9320b02a R14: 0000000000000000 R15: ffffffff9320ab40
 __smp_text_poke_batch_add arch/x86/kernel/alternative.c:3077 [inline]
 smp_text_poke_batch_add+0x29a/0xa80 arch/x86/kernel/alternative.c:3179
 arch_jump_label_transform_queue+0x8b/0x110 arch/x86/kernel/jump_label.c:138
 __jump_label_update+0x185/0x380 kernel/jump_label.c:513
 static_key_slow_inc_cpuslocked+0x86/0x120 kernel/jump_label.c:168
 static_key_slow_inc+0x1a/0x30 kernel/jump_label.c:191
 bpf_enable_runtime_stats kernel/bpf/syscall.c:5995 [inline]
 bpf_enable_stats+0x101/0x140 kernel/bpf/syscall.c:6014
 __sys_bpf+0x722/0x950 kernel/bpf/syscall.c:6311
 __do_sys_bpf kernel/bpf/syscall.c:6341 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:6339 [inline]
 __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:6339
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f300799a339
Code: Unable to access opcode bytes at 0x7f300799a30f.
RSP: 002b:00007f300873f028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f3007bd5fa0 RCX: 00007f300799a339
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000020
RBP: 00007f300873f090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007f3007bd6038 R14: 00007f3007bd5fa0 R15: 00007ffd284444b8
 </TASK>
CPU: 0 UID: 0 PID: 6525 Comm: syz.4.21 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 fail_dump lib/fault-inject.c:73 [inline]
 should_fail_ex+0x412/0x560 lib/fault-inject.c:174
 strncpy_from_user+0x36/0x2b0 lib/strncpy_from_user.c:118
 strncpy_from_user_nofault+0x71/0x150 mm/maccess.c:192
 bpf_probe_read_user_str_common kernel/trace/bpf_trace.c:214 [inline]
 ____bpf_probe_read_compat_str kernel/trace/bpf_trace.c:309 [inline]
 bpf_probe_read_compat_str+0xe1/0x180 kernel/trace/bpf_trace.c:305
 bpf_prog_90df569eec4aaf11+0x70/0x76
 bpf_dispatcher_nop_func include/linux/bpf.h:1402 [inline]
 __bpf_prog_run include/linux/filter.h:723 [inline]
 bpf_prog_run include/linux/filter.h:730 [inline]
 __bpf_trace_run kernel/trace/bpf_trace.c:2088 [inline]
 bpf_trace_run2+0x371/0x840 kernel/trace/bpf_trace.c:2129
 __bpf_trace_tlb_flush+0x11d/0x170 include/trace/events/tlb.h:39
 __do_trace_tlb_flush include/trace/events/tlb.h:39 [inline]
 trace_tlb_flush+0x132/0x170 include/trace/events/tlb.h:39
 switch_mm_irqs_off+0x472/0x690 arch/x86/mm/tlb.c:-1
 context_switch kernel/sched/core.c:5274 [inline]
 __schedule+0x10bc/0x5340 kernel/sched/core.c:6907
 preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7234
 irqentry_exit+0x599/0x620 kernel/entry/common.c:239
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:get_current arch/x86/include/asm/current.h:25 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:245 [inline]
RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x8/0x90 kernel/kcov.c:314
Code: 89 44 11 20 e9 49 19 ea 09 cc 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 04 24 <65> 48 8b 15 08 00 56 11 65 8b 0d 29 00 56 11 81 e1 00 01 ff 00 74
RSP: 0018:ffffc90003827ad8 EFLAGS: 00000246
RAX: ffffffff8bacfefa RBX: ffffc90003827b40 RCX: ffff888028491e40
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90003827c40 R08: ffff888028491e40 R09: 0000000000000003
R10: 0000000000000008 R11: 0000000000000000 R12: 00000000000002c0
R13: ffffffff9320b02a R14: 0000000000000000 R15: ffffffff9320ab40
 __smp_text_poke_batch_add arch/x86/kernel/alternative.c:3077 [inline]
 smp_text_poke_batch_add+0x29a/0xa80 arch/x86/kernel/alternative.c:3179
 arch_jump_label_transform_queue+0x8b/0x110 arch/x86/kernel/jump_label.c:138
 __jump_label_update+0x185/0x380 kernel/jump_label.c:513
 static_key_slow_inc_cpuslocked+0x86/0x120 kernel/jump_label.c:168
 static_key_slow_inc+0x1a/0x30 kernel/jump_label.c:191
 bpf_enable_runtime_stats kernel/bpf/syscall.c:5995 [inline]
 bpf_enable_stats+0x101/0x140 kernel/bpf/syscall.c:6014
 __sys_bpf+0x722/0x950 kernel/bpf/syscall.c:6311
 __do_sys_bpf kernel/bpf/syscall.c:6341 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:6339 [inline]
 __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:6339
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f300799a339
Code: Unable to access opcode bytes at 0x7f300799a30f.
RSP: 002b:00007f300873f028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f3007bd5fa0 RCX: 00007f300799a339
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000020
RBP: 00007f300873f090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007f3007bd6038 R14: 00007f3007bd5fa0 R15: 00007ffd284444b8
 </TASK>
----------------
Code disassembly (best guess):
   0:	89 44 11 20          	mov    %eax,0x20(%rcx,%rdx,1)
   4:	e9 49 19 ea 09       	jmp    0x9ea1952
   9:	cc                   	int3
   a:	0f 1f 84 00 00 00 00 	nopl   0x0(%rax,%rax,1)
  11:	00
  12:	90                   	nop
  13:	90                   	nop
  14:	90                   	nop
  15:	90                   	nop
  16:	90                   	nop
  17:	90                   	nop
  18:	90                   	nop
  19:	90                   	nop
  1a:	90                   	nop
  1b:	90                   	nop
  1c:	90                   	nop
  1d:	90                   	nop
  1e:	90                   	nop
  1f:	90                   	nop
  20:	90                   	nop
  21:	90                   	nop
  22:	f3 0f 1e fa          	endbr64
  26:	48 8b 04 24          	mov    (%rsp),%rax
* 2a:	65 48 8b 15 08 00 56 	mov    %gs:0x11560008(%rip),%rdx        # 0x1156003a <-- trapping instruction
  31:	11
  32:	65 8b 0d 29 00 56 11 	mov    %gs:0x11560029(%rip),%ecx        # 0x11560062
  39:	81 e1 00 01 ff 00    	and    $0xff0100,%ecx
  3f:	74                   	.byte 0x74