======================================================
WARNING: possible circular locking dependency detected
6.10.0-syzkaller-04559-g7d30b8aa4fc3 #0 Not tainted
------------------------------------------------------
syz.0.1512/11254 is trying to acquire lock:
ffff8880172de418 (&p->pi_lock){-.-.}-{2:2}, at: class_raw_spinlock_irqsave_constructor include/linux/spinlock.h:551 [inline]
ffff8880172de418 (&p->pi_lock){-.-.}-{2:2}, at: try_to_wake_up+0xb0/0x1470 kernel/sched/core.c:4051

but task is already holding 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_released+0x83/0x620 mm/mmap_lock.c:243

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
       bpf_prog_8e0e2561a5fce473+0x3b/0x6a
       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
       unwind_next_frame+0x2124/0x2a00 arch/x86/kernel/unwind_orc.c:672
       __unwind_start+0x641/0x7c0 arch/x86/kernel/unwind_orc.c:760
       unwind_start arch/x86/include/asm/unwind.h:64 [inline]
       arch_stack_walk+0x103/0x1b0 arch/x86/kernel/stacktrace.c:24
       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
       unpoison_slab_object mm/kasan/common.c:312 [inline]
       __kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:338
       kasan_slab_alloc include/linux/kasan.h:201 [inline]
       slab_post_alloc_hook mm/slub.c:3940 [inline]
       slab_alloc_node mm/slub.c:4002 [inline]
       kmem_cache_alloc_noprof+0x135/0x2a0 mm/slub.c:4009
       getname_flags+0xb7/0x540 fs/namei.c:139
       getname fs/namei.c:225 [inline]
       __do_sys_rename fs/namei.c:5171 [inline]
       __se_sys_rename fs/namei.c:5168 [inline]
       __x64_sys_rename+0x6a/0x90 fs/namei.c:5168
       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_released+0x1f2/0x620 mm/mmap_lock.c:243
       __mmap_lock_trace_released include/linux/mmap_lock.h:42 [inline]
       mmap_read_unlock include/linux/mmap_lock.h:170 [inline]
       do_user_addr_fault arch/x86/mm/fault.c:1417 [inline]
       handle_page_fault arch/x86/mm/fault.c:1481 [inline]
       exc_page_fault+0x7a2/0x8c0 arch/x86/mm/fault.c:1539
       asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
       fault_in_readable+0x165/0x2b0
       fault_in_iov_iter_readable+0x229/0x280 lib/iov_iter.c:94
       generic_perform_write+0x220/0x640 mm/filemap.c:4006
       shmem_file_write_iter+0xfc/0x120 mm/shmem.c:2930
       new_sync_write fs/read_write.c:497 [inline]
       vfs_write+0xa72/0xc90 fs/read_write.c:590
       ksys_write+0x1a0/0x2c0 fs/read_write.c:643
       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:
  &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 ***

5 locks held by syz.0.1512/11254:
 #0: ffff8880299d65c8 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x24e/0x310 fs/file.c:1191
 #1: ffff88805e300420 (sb_writers#5){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2876 [inline]
 #1: ffff88805e300420 (sb_writers#5){.+.+}-{0:0}, at: vfs_write+0x227/0xc90 fs/read_write.c:586
 #2: ffff888011c1e4c0 (&sb->s_type->i_mutex_key#12){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:799 [inline]
 #2: ffff888011c1e4c0 (&sb->s_type->i_mutex_key#12){+.+.}-{3:3}, at: shmem_file_write_iter+0x83/0x120 mm/shmem.c:2920
 #3: ffff88802f06b118 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:163 [inline]
 #3: ffff88802f06b118 (&mm->mmap_lock){++++}-{3:3}, at: get_mmap_lock_carefully mm/memory.c:5716 [inline]
 #3: ffff88802f06b118 (&mm->mmap_lock){++++}-{3:3}, at: lock_mm_and_find_vma+0x32/0x2f0 mm/memory.c:5776
 #4: ffff8880b9238798 (lock#10){+.+.}-{2:2}, at: local_lock_acquire include/linux/local_lock_internal.h:29 [inline]
 #4: ffff8880b9238798 (lock#10){+.+.}-{2:2}, at: __mmap_lock_do_trace_released+0x83/0x620 mm/mmap_lock.c:243

stack backtrace:
CPU: 0 PID: 11254 Comm: syz.0.1512 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_released+0x1f2/0x620 mm/mmap_lock.c:243
 __mmap_lock_trace_released include/linux/mmap_lock.h:42 [inline]
 mmap_read_unlock include/linux/mmap_lock.h:170 [inline]
 do_user_addr_fault arch/x86/mm/fault.c:1417 [inline]
 handle_page_fault arch/x86/mm/fault.c:1481 [inline]
 exc_page_fault+0x7a2/0x8c0 arch/x86/mm/fault.c:1539
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0010:fault_in_readable+0x165/0x2b0 mm/gup.c:2355
Code: b4 ff 4c 8d b3 ff 0f 00 00 48 89 d8 4d 01 e6 49 81 e6 00 f0 ff ff 49 39 c6 72 6b e8 35 d7 b4 ff 4c 39 f3 74 6e 4c 89 64 24 10 <44> 8a 23 43 0f b6 04 2f 84 c0 75 18 44 88 64 24 40 48 81 c3 00 10
RSP: 0018:ffffc9000dad7a00 EFLAGS: 00050287
RAX: ffffffff81e1868b RBX: 000000002000a000 RCX: 0000000000040000
RDX: ffffc9000460a000 RSI: 0000000000002042 RDI: 0000000000002043
RBP: ffffc9000dad7ab8 R08: ffffffff81e18628 R09: ffffffff84adca99
R10: 0000000000000002 R11: ffff888060781e00 R12: 0000000000001000
R13: dffffc0000000000 R14: 000000002000b000 R15: 1ffff92001b5af48
 fault_in_iov_iter_readable+0x229/0x280 lib/iov_iter.c:94
 generic_perform_write+0x220/0x640 mm/filemap.c:4006
 shmem_file_write_iter+0xfc/0x120 mm/shmem.c:2930
 new_sync_write fs/read_write.c:497 [inline]
 vfs_write+0xa72/0xc90 fs/read_write.c:590
 ksys_write+0x1a0/0x2c0 fs/read_write.c:643
 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: 0033:0x7fb289777299
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:00007fb28a4b3048 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fb289905f80 RCX: 00007fb289777299
RDX: 0000000020000992 RSI: 0000000020000980 RDI: 000000000000000e
RBP: 00007fb2897e48e6 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fb289905f80 R15: 00007ffe910f1268
 </TASK>
----------------
Code disassembly (best guess):
   0:	b4 ff                	mov    $0xff,%ah
   2:	4c 8d b3 ff 0f 00 00 	lea    0xfff(%rbx),%r14
   9:	48 89 d8             	mov    %rbx,%rax
   c:	4d 01 e6             	add    %r12,%r14
   f:	49 81 e6 00 f0 ff ff 	and    $0xfffffffffffff000,%r14
  16:	49 39 c6             	cmp    %rax,%r14
  19:	72 6b                	jb     0x86
  1b:	e8 35 d7 b4 ff       	call   0xffb4d755
  20:	4c 39 f3             	cmp    %r14,%rbx
  23:	74 6e                	je     0x93
  25:	4c 89 64 24 10       	mov    %r12,0x10(%rsp)
* 2a:	44 8a 23             	mov    (%rbx),%r12b <-- trapping instruction
  2d:	43 0f b6 04 2f       	movzbl (%r15,%r13,1),%eax
  32:	84 c0                	test   %al,%al
  34:	75 18                	jne    0x4e
  36:	44 88 64 24 40       	mov    %r12b,0x40(%rsp)
  3b:	48                   	rex.W
  3c:	81                   	.byte 0x81
  3d:	c3                   	ret
  3e:	00 10                	add    %dl,(%rax)