======================================================
WARNING: possible circular locking dependency detected
6.10.0-syzkaller-04559-g7d30b8aa4fc3 #0 Not tainted
------------------------------------------------------
syz.0.1199/11123 is trying to acquire lock:
ffff8880b9238798 (lock#10){+.+.}-{2:2}, at: local_lock_acquire include/linux/local_lock_internal.h:29 [inline]
ffff8880b9238798 (lock#10){+.+.}-{2:2}, at: __mmap_lock_do_trace_acquire_returned+0x8f/0x630 mm/mmap_lock.c:237

but task is already holding lock:
ffff8880b923e858 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:560

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #2 (&rq->__lock){-.-.}-{2:2}:
       lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5753
       _raw_spin_lock_nested+0x31/0x40 kernel/locking/spinlock.c:378
       raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:560
       raw_spin_rq_lock kernel/sched/sched.h:1415 [inline]
       _raw_spin_rq_lock_irqsave kernel/sched/sched.h:1435 [inline]
       rq_lock_irqsave kernel/sched/sched.h:1700 [inline]
       class_rq_lock_irqsave_constructor kernel/sched/sched.h:1749 [inline]
       sched_mm_cid_exit_signals+0x17b/0x4b0 kernel/sched/core.c:10245
       exit_signals+0x2a1/0x5c0 kernel/signal.c:3022
       do_exit+0x6b4/0x27f0 kernel/exit.c:834
       __do_sys_exit kernel/exit.c:993 [inline]
       __se_sys_exit kernel/exit.c:991 [inline]
       __pfx___ia32_sys_exit+0x0/0x10 kernel/exit.c:991
       x64_sys_call+0x2622/0x2640 arch/x86/include/generated/asm/syscalls_64.h:61
       do_syscall_x64 arch/x86/entry/common.c:52 [inline]
       do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #1 (&sighand->siglock){-.-.}-{2:2}:
       lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5753
       __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
       _raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162
       __lock_task_sighand+0x149/0x2d0 kernel/signal.c:1412
       lock_task_sighand include/linux/sched/signal.h:746 [inline]
       do_send_sig_info kernel/signal.c:1300 [inline]
       group_send_sig_info+0x274/0x310 kernel/signal.c:1451
       bpf_send_signal_common+0x2dd/0x430 kernel/trace/bpf_trace.c:881
       ____bpf_send_signal_thread kernel/trace/bpf_trace.c:898 [inline]
       bpf_send_signal_thread+0x16/0x20 kernel/trace/bpf_trace.c:896
       bpf_prog_ec3b2eefa702d8d3+0x6/0x47
       bpf_dispatcher_nop_func include/linux/bpf.h:1252 [inline]
       __bpf_prog_run include/linux/filter.h:691 [inline]
       bpf_prog_run include/linux/filter.h:698 [inline]
       __bpf_trace_run kernel/trace/bpf_trace.c:2406 [inline]
       bpf_trace_run4+0x334/0x590 kernel/trace/bpf_trace.c:2449
       trace_mmap_lock_acquire_returned include/trace/events/mmap_lock.h:52 [inline]
       __mmap_lock_do_trace_acquire_returned+0x5c8/0x630 mm/mmap_lock.c:237
       __mmap_lock_trace_acquire_returned include/linux/mmap_lock.h:36 [inline]
       mmap_write_lock_killable include/linux/mmap_lock.h:123 [inline]
       dup_mmap kernel/fork.c:634 [inline]
       dup_mm kernel/fork.c:1671 [inline]
       copy_mm+0x1e9a/0x1f30 kernel/fork.c:1720
       copy_process+0x187a/0x3dc0 kernel/fork.c:2373
       kernel_clone+0x226/0x8f0 kernel/fork.c:2780
       __do_sys_clone kernel/fork.c:2923 [inline]
       __se_sys_clone kernel/fork.c:2907 [inline]
       __x64_sys_clone+0x258/0x2a0 kernel/fork.c:2907
       do_syscall_x64 arch/x86/entry/common.c:52 [inline]
       do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #0 (lock#10){+.+.}-{2:2}:
       check_prev_add kernel/locking/lockdep.c:3133 [inline]
       check_prevs_add kernel/locking/lockdep.c:3252 [inline]
       validate_chain+0x18e0/0x5900 kernel/locking/lockdep.c:3868
       __lock_acquire+0x1346/0x1fd0 kernel/locking/lockdep.c:5136
       lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5753
       local_lock_acquire include/linux/local_lock_internal.h:29 [inline]
       __mmap_lock_do_trace_acquire_returned+0xa8/0x630 mm/mmap_lock.c:237
       __mmap_lock_trace_acquire_returned include/linux/mmap_lock.h:36 [inline]
       mmap_read_trylock include/linux/mmap_lock.h:164 [inline]
       stack_map_get_build_id_offset+0x9af/0x9d0 kernel/bpf/stackmap.c:141
       __bpf_get_stack+0x4ad/0x5a0 kernel/bpf/stackmap.c:449
       ____bpf_get_stack_raw_tp kernel/trace/bpf_trace.c:1997 [inline]
       bpf_get_stack_raw_tp+0x1a3/0x240 kernel/trace/bpf_trace.c:1987
       bpf_prog_ec3b2eefa702d8d3+0x43/0x47
       bpf_dispatcher_nop_func include/linux/bpf.h:1252 [inline]
       __bpf_prog_run include/linux/filter.h:691 [inline]
       bpf_prog_run include/linux/filter.h:698 [inline]
       __bpf_trace_run kernel/trace/bpf_trace.c:2406 [inline]
       bpf_trace_run2+0x2ec/0x540 kernel/trace/bpf_trace.c:2447
       trace_tlb_flush+0x118/0x140 include/trace/events/tlb.h:38
       switch_mm_irqs_off+0x7cb/0xae0
       context_switch kernel/sched/core.c:5172 [inline]
       __schedule+0x1079/0x4a60 kernel/sched/core.c:6529
       preempt_schedule_common+0x84/0xd0 kernel/sched/core.c:6708
       preempt_schedule+0xe1/0xf0 kernel/sched/core.c:6732
       preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk.S:12
       __raw_spin_unlock include/linux/spinlock_api_smp.h:143 [inline]
       _raw_spin_unlock+0x3e/0x50 kernel/locking/spinlock.c:186
       spin_unlock include/linux/spinlock.h:391 [inline]
       __text_poke+0xa6b/0xd30 arch/x86/kernel/alternative.c:1960
       text_poke arch/x86/kernel/alternative.c:1984 [inline]
       text_poke_bp_batch+0x265/0xb30 arch/x86/kernel/alternative.c:2292
       text_poke_flush arch/x86/kernel/alternative.c:2486 [inline]
       text_poke_finish+0x30/0x50 arch/x86/kernel/alternative.c:2493
       arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146
       static_key_enable_cpuslocked+0x136/0x260 kernel/jump_label.c:210
       static_key_enable+0x1a/0x20 kernel/jump_label.c:223
       tracepoint_add_func+0x953/0x9e0 kernel/tracepoint.c:361
       tracepoint_probe_register_prio_may_exist+0x122/0x190 kernel/tracepoint.c:482
       bpf_raw_tp_link_attach+0x48b/0x6e0 kernel/bpf/syscall.c:3896
       bpf_raw_tracepoint_open+0x1c2/0x240 kernel/bpf/syscall.c:3927
       __sys_bpf+0x3c0/0x810 kernel/bpf/syscall.c:5752
       __do_sys_bpf kernel/bpf/syscall.c:5817 [inline]
       __se_sys_bpf kernel/bpf/syscall.c:5815 [inline]
       __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5815
       do_syscall_x64 arch/x86/entry/common.c:52 [inline]
       do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

other info that might help us debug this:

Chain exists of:
  lock#10 --> &sighand->siglock --> &rq->__lock

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&rq->__lock);
                               lock(&sighand->siglock);
                               lock(&rq->__lock);
  lock(lock#10);

 *** DEADLOCK ***

8 locks held by syz.0.1199/11123:
 #0: ffffffff8e783368 (tracepoints_mutex){+.+.}-{3:3}, at: tracepoint_probe_register_prio_may_exist+0xbb/0x190 kernel/tracepoint.c:478
 #1: ffffffff8e5d05b0 (cpu_hotplug_lock){++++}-{0:0}, at: static_key_enable+0x12/0x20 kernel/jump_label.c:222
 #2: ffffffff8e7e5388 (jump_label_mutex){+.+.}-{3:3}, at: jump_label_lock kernel/jump_label.c:27 [inline]
 #2: ffffffff8e7e5388 (jump_label_mutex){+.+.}-{3:3}, at: static_key_enable_cpuslocked+0xd7/0x260 kernel/jump_label.c:207
 #3: ffffffff8e5e5728 (text_mutex){+.+.}-{3:3}, at: arch_jump_label_transform_apply+0x17/0x30 arch/x86/kernel/jump_label.c:145
 #4: ffffffff8e735fe0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:327 [inline]
 #4: ffffffff8e735fe0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:839 [inline]
 #4: ffffffff8e735fe0 (rcu_read_lock){....}-{1:2}, at: __pte_offset_map+0x82/0x380 mm/pgtable-generic.c:287
 #5: ffff8880b923e858 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:560
 #6: ffffffff8e735fe0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:327 [inline]
 #6: ffffffff8e735fe0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:839 [inline]
 #6: ffffffff8e735fe0 (rcu_read_lock){....}-{1:2}, at: __bpf_trace_run kernel/trace/bpf_trace.c:2405 [inline]
 #6: ffffffff8e735fe0 (rcu_read_lock){....}-{1:2}, at: bpf_trace_run2+0x1fc/0x540 kernel/trace/bpf_trace.c:2447
 #7: ffff88802bb50b18 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:163 [inline]
 #7: ffff88802bb50b18 (&mm->mmap_lock){++++}-{3:3}, at: stack_map_get_build_id_offset+0x237/0x9d0 kernel/bpf/stackmap.c:141

stack backtrace:
CPU: 0 PID: 11123 Comm: syz.0.1199 Not tainted 6.10.0-syzkaller-04559-g7d30b8aa4fc3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114
 check_noncircular+0x36a/0x4a0 kernel/locking/lockdep.c:2186
 check_prev_add kernel/locking/lockdep.c:3133 [inline]
 check_prevs_add kernel/locking/lockdep.c:3252 [inline]
 validate_chain+0x18e0/0x5900 kernel/locking/lockdep.c:3868
 __lock_acquire+0x1346/0x1fd0 kernel/locking/lockdep.c:5136
 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5753
 local_lock_acquire include/linux/local_lock_internal.h:29 [inline]
 __mmap_lock_do_trace_acquire_returned+0xa8/0x630 mm/mmap_lock.c:237
 __mmap_lock_trace_acquire_returned include/linux/mmap_lock.h:36 [inline]
 mmap_read_trylock include/linux/mmap_lock.h:164 [inline]
 stack_map_get_build_id_offset+0x9af/0x9d0 kernel/bpf/stackmap.c:141
 __bpf_get_stack+0x4ad/0x5a0 kernel/bpf/stackmap.c:449
 ____bpf_get_stack_raw_tp kernel/trace/bpf_trace.c:1997 [inline]
 bpf_get_stack_raw_tp+0x1a3/0x240 kernel/trace/bpf_trace.c:1987
 bpf_prog_ec3b2eefa702d8d3+0x43/0x47
 bpf_dispatcher_nop_func include/linux/bpf.h:1252 [inline]
 __bpf_prog_run include/linux/filter.h:691 [inline]
 bpf_prog_run include/linux/filter.h:698 [inline]
 __bpf_trace_run kernel/trace/bpf_trace.c:2406 [inline]
 bpf_trace_run2+0x2ec/0x540 kernel/trace/bpf_trace.c:2447
 trace_tlb_flush+0x118/0x140 include/trace/events/tlb.h:38
 switch_mm_irqs_off+0x7cb/0xae0
 context_switch kernel/sched/core.c:5172 [inline]
 __schedule+0x1079/0x4a60 kernel/sched/core.c:6529
 preempt_schedule_common+0x84/0xd0 kernel/sched/core.c:6708
 preempt_schedule+0xe1/0xf0 kernel/sched/core.c:6732
 preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk.S:12
 __raw_spin_unlock include/linux/spinlock_api_smp.h:143 [inline]
 _raw_spin_unlock+0x3e/0x50 kernel/locking/spinlock.c:186
 spin_unlock include/linux/spinlock.h:391 [inline]
 __text_poke+0xa6b/0xd30 arch/x86/kernel/alternative.c:1960
 text_poke arch/x86/kernel/alternative.c:1984 [inline]
 text_poke_bp_batch+0x265/0xb30 arch/x86/kernel/alternative.c:2292
 text_poke_flush arch/x86/kernel/alternative.c:2486 [inline]
 text_poke_finish+0x30/0x50 arch/x86/kernel/alternative.c:2493
 arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146
 static_key_enable_cpuslocked+0x136/0x260 kernel/jump_label.c:210
 static_key_enable+0x1a/0x20 kernel/jump_label.c:223
 tracepoint_add_func+0x953/0x9e0 kernel/tracepoint.c:361
 tracepoint_probe_register_prio_may_exist+0x122/0x190 kernel/tracepoint.c:482
 bpf_raw_tp_link_attach+0x48b/0x6e0 kernel/bpf/syscall.c:3896
 bpf_raw_tracepoint_open+0x1c2/0x240 kernel/bpf/syscall.c:3927
 __sys_bpf+0x3c0/0x810 kernel/bpf/syscall.c:5752
 __do_sys_bpf kernel/bpf/syscall.c:5817 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5815 [inline]
 __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5815
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff7dd577299
Code: Unable to access opcode bytes at 0x7ff7dd57726f.
RSP: 002b:00007ff7de27d048 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007ff7dd705f80 RCX: 00007ff7dd577299
RDX: 0000000000000010 RSI: 0000000020000180 RDI: 0000000000000011
RBP: 00007ff7dd5e48e6 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007ff7dd705f80 R15: 00007ffec2dcf258
 </TASK>