======================================================
WARNING: possible circular locking dependency detected
6.10.0-syzkaller-04559-g7d30b8aa4fc3 #0 Not tainted
------------------------------------------------------
syz.4.133/6149 is trying to acquire lock:
ffff888017e80a18 (&p->pi_lock){-.-.}-{2:2}, at: class_raw_spinlock_irqsave_constructor include/linux/spinlock.h:551 [inline]
ffff888017e80a18 (&p->pi_lock){-.-.}-{2:2}, at: try_to_wake_up+0xb0/0x1470 kernel/sched/core.c:4051

but task is already holding lock:
ffff8880b9338798 (lock#10){+.+.}-{2:2}, at: local_lock_acquire include/linux/local_lock_internal.h:29 [inline]
ffff8880b9338798 (lock#10){+.+.}-{2:2}, at: __mmap_lock_do_trace_acquire_returned+0x8f/0x630 mm/mmap_lock.c:237

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #2 (lock#10){+.+.}-{2:2}:
       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
       0xffffffffa0000833
       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_irq+0xfb/0x1c0 kernel/sched/core.c:6851
       irqentry_exit+0x5e/0x90 kernel/entry/common.c:354
       asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
       lock_acquire+0x264/0x550 kernel/locking/lockdep.c:5757
       rcu_lock_acquire include/linux/rcupdate.h:327 [inline]
       rcu_read_lock include/linux/rcupdate.h:839 [inline]
       is_bpf_text_address+0x46/0x2a0 kernel/bpf/core.c:767
       kernel_text_address+0xa7/0xe0 kernel/extable.c:125
       __kernel_text_address+0xd/0x40 kernel/extable.c:79
       unwind_get_return_address+0x5d/0xc0 arch/x86/kernel/unwind_orc.c:369
       arch_stack_walk+0x125/0x1b0 arch/x86/kernel/stacktrace.c:26
       stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122
       kasan_save_stack mm/kasan/common.c:47 [inline]
       kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
       kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579
       poison_slab_object+0xe0/0x150 mm/kasan/common.c:240
       __kasan_slab_free+0x37/0x60 mm/kasan/common.c:256
       kasan_slab_free include/linux/kasan.h:184 [inline]
       slab_free_hook mm/slub.c:2196 [inline]
       slab_free mm/slub.c:4438 [inline]
       kfree+0x149/0x360 mm/slub.c:4559
       tomoyo_path_perm+0x5ab/0x740 security/tomoyo/file.c:842
       security_inode_getattr+0xd8/0x130 security/security.c:2269
       vfs_getattr+0x45/0x430 fs/stat.c:204
       vfs_statx_path fs/stat.c:251 [inline]
       vfs_statx+0x199/0x490 fs/stat.c:315
       vfs_fstatat+0x145/0x190 fs/stat.c:341
       __do_sys_newfstatat fs/stat.c:505 [inline]
       __se_sys_newfstatat fs/stat.c:499 [inline]
       __x64_sys_newfstatat+0x11d/0x1a0 fs/stat.c:499
       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 (&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]
       rq_lock kernel/sched/sched.h:1714 [inline]
       task_fork_fair+0x61/0x1e0 kernel/sched/fair.c:12710
       sched_cgroup_fork+0x37c/0x410 kernel/sched/core.c:4633
       copy_process+0x2217/0x3dc0 kernel/fork.c:2482
       kernel_clone+0x226/0x8f0 kernel/fork.c:2780
       user_mode_thread+0x132/0x1a0 kernel/fork.c:2858
       rest_init+0x23/0x300 init/main.c:712
       start_kernel+0x47a/0x500 init/main.c:1103
       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

-> #0 (&p->pi_lock){-.-.}-{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
       __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
       _raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162
       class_raw_spinlock_irqsave_constructor include/linux/spinlock.h:551 [inline]
       try_to_wake_up+0xb0/0x1470 kernel/sched/core.c:4051
       rcu_read_unlock_special+0x3db/0x550 kernel/rcu/tree_plugin.h:665
       __rcu_read_unlock+0xa1/0x110 kernel/rcu/tree_plugin.h:436
       __mmap_lock_do_trace_acquire_returned+0x1f9/0x630 mm/mmap_lock.c:237
       __mmap_lock_trace_acquire_returned include/linux/mmap_lock.h:36 [inline]
       mmap_read_lock_killable include/linux/mmap_lock.h:154 [inline]
       __get_user_pages_locked mm/gup.c:1846 [inline]
       get_dump_page+0x2c7/0x2f0 mm/gup.c:2389
       dump_user_range+0x14c/0x950 fs/coredump.c:952
       elf_core_dump+0x3de6/0x4720 fs/binfmt_elf.c:2116
       do_coredump+0x19e1/0x2940 fs/coredump.c:767
       get_signal+0x13fa/0x1740 kernel/signal.c:2902
       arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:310
       exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
       exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
       irqentry_exit_to_user_mode+0x79/0x280 kernel/entry/common.c:231
       exc_general_protection+0x410/0x5d0 arch/x86/kernel/traps.c:644
       asm_exc_general_protection+0x26/0x30 arch/x86/include/asm/idtentry.h:617

other info that might help us debug this:

Chain exists of:
  &p->pi_lock --> &rq->__lock --> lock#10

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(lock#10);
                               lock(&rq->__lock);
                               lock(lock#10);
  lock(&p->pi_lock);

 *** DEADLOCK ***

3 locks held by syz.4.133/6149:
 #0: ffff88801ea56420 (sb_writers#5){.+.+}-{0:0}, at: do_coredump+0x19a9/0x2940 fs/coredump.c:766
 #1: ffff88807ae31498 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_lock_killable include/linux/mmap_lock.h:153 [inline]
 #1: ffff88807ae31498 (&mm->mmap_lock){++++}-{3:3}, at: __get_user_pages_locked mm/gup.c:1846 [inline]
 #1: ffff88807ae31498 (&mm->mmap_lock){++++}-{3:3}, at: get_dump_page+0xe2/0x2f0 mm/gup.c:2389
 #2: ffff8880b9338798 (lock#10){+.+.}-{2:2}, at: local_lock_acquire include/linux/local_lock_internal.h:29 [inline]
 #2: ffff8880b9338798 (lock#10){+.+.}-{2:2}, at: __mmap_lock_do_trace_acquire_returned+0x8f/0x630 mm/mmap_lock.c:237

stack backtrace:
CPU: 1 PID: 6149 Comm: syz.4.133 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
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162
 class_raw_spinlock_irqsave_constructor include/linux/spinlock.h:551 [inline]
 try_to_wake_up+0xb0/0x1470 kernel/sched/core.c:4051
 rcu_read_unlock_special+0x3db/0x550 kernel/rcu/tree_plugin.h:665
 __rcu_read_unlock+0xa1/0x110 kernel/rcu/tree_plugin.h:436
 __mmap_lock_do_trace_acquire_returned+0x1f9/0x630 mm/mmap_lock.c:237
 __mmap_lock_trace_acquire_returned include/linux/mmap_lock.h:36 [inline]
 mmap_read_lock_killable include/linux/mmap_lock.h:154 [inline]
 __get_user_pages_locked mm/gup.c:1846 [inline]
 get_dump_page+0x2c7/0x2f0 mm/gup.c:2389
 dump_user_range+0x14c/0x950 fs/coredump.c:952
 elf_core_dump+0x3de6/0x4720 fs/binfmt_elf.c:2116
 do_coredump+0x19e1/0x2940 fs/coredump.c:767
 get_signal+0x13fa/0x1740 kernel/signal.c:2902
 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:310
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 irqentry_exit_to_user_mode+0x79/0x280 kernel/entry/common.c:231
 exc_general_protection+0x410/0x5d0 arch/x86/kernel/traps.c:644
 asm_exc_general_protection+0x26/0x30 arch/x86/include/asm/idtentry.h:617
RIP: 0033:0x7f621c5772a1
Code: 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 83 c8 ff c3 66 2e 0f 1f
RSP: 002b:00000000200000b0 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f621c705f80 RCX: 00007f621c577299
RDX: 00000000200000c0 RSI: 00000000200000b0 RDI: 0000000008000000
RBP: 00007f621c5e48e6 R08: 0000000020000140 R09: 0000000020000140
R10: 0000000020000100 R11: 0000000000000206 R12: 0000000000000000
R13: 000000000000000b R14: 00007f621c705f80 R15: 00007ffe98b06048
 </TASK>