syzbot

================================
WARNING: inconsistent lock state
5.15.157-syzkaller #0 Not tainted
--------------------------------
inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage.
sshd/3496 [HC0[0]:SC1[1]:HE0:SE0] takes:
ffff8880b9a35bb8 (lock#8){+.?.}-{2:2}, at: local_lock_acquire+0xd/0x170 include/linux/local_lock_internal.h:28
{SOFTIRQ-ON-W} state was registered at:
  lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623
  local_lock_acquire+0x29/0x170 include/linux/local_lock_internal.h:29
  __mmap_lock_do_trace_acquire_returned+0x7c/0x340 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:137 [inline]
  do_user_addr_fault arch/x86/mm/fault.c:1329 [inline]
  handle_page_fault arch/x86/mm/fault.c:1476 [inline]
  exc_page_fault+0x59c/0x740 arch/x86/mm/fault.c:1532
  asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:568
irq event stamp: 45255
hardirqs last  enabled at (45254): [<ffffffff8a274cab>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline]
hardirqs last  enabled at (45254): [<ffffffff8a274cab>] _raw_spin_unlock_irqrestore+0x8b/0x130 kernel/locking/spinlock.c:194
hardirqs last disabled at (45255): [<ffffffff8152ac86>] queue_work_on+0xf6/0x250 kernel/workqueue.c:1556
softirqs last  enabled at (45208): [<ffffffff814d84f5>] invoke_softirq kernel/softirq.c:432 [inline]
softirqs last  enabled at (45208): [<ffffffff814d84f5>] __irq_exit_rcu+0x155/0x240 kernel/softirq.c:637
softirqs last disabled at (45231): [<ffffffff814d84f5>] invoke_softirq kernel/softirq.c:432 [inline]
softirqs last disabled at (45231): [<ffffffff814d84f5>] __irq_exit_rcu+0x155/0x240 kernel/softirq.c:637

other info that might help us debug this:
 Possible unsafe locking scenario:

       CPU0
       ----
  lock(lock#8);
  <Interrupt>
    lock(lock#8);

 *** DEADLOCK ***

5 locks held by sshd/3496:
 #0: ffffffff8c91fbe0 (rcu_callback){....}-{0:0}, at: rcu_lock_acquire+0x0/0x20
 #1: ffffffff8c91fb20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:311
 #2: ffff8880b9a39b58 (&pool->lock){-.-.}-{2:2}, at: __queue_work+0x56d/0xd00
 #3: ffffffff8c91fb20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:311
 #4: ffff88807909f128 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:136 [inline]
 #4: ffff88807909f128 (&mm->mmap_lock){++++}-{3:3}, at: stack_map_get_build_id_offset+0x23e/0x930 kernel/bpf/stackmap.c:185

stack backtrace:
CPU: 0 PID: 3496 Comm: sshd Not tainted 5.15.157-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106
 valid_state+0x134/0x1c0 kernel/locking/lockdep.c:3932
 mark_lock_irq+0xa8/0xba0 kernel/locking/lockdep.c:4135
 mark_lock+0x21a/0x340 kernel/locking/lockdep.c:4591
 __lock_acquire+0xb9d/0x1ff0 kernel/locking/lockdep.c:4966
 lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623
 local_lock_acquire+0x29/0x170 include/linux/local_lock_internal.h:29
 __mmap_lock_do_trace_acquire_returned+0x7c/0x340 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:137 [inline]
 stack_map_get_build_id_offset+0x612/0x930 kernel/bpf/stackmap.c:185
 __bpf_get_stack+0x495/0x570 kernel/bpf/stackmap.c:496
 ____bpf_get_stack_raw_tp kernel/trace/bpf_trace.c:1490 [inline]
 bpf_get_stack_raw_tp+0x1b2/0x220 kernel/trace/bpf_trace.c:1480
 bpf_prog_e6cf5f9c69743609+0x3a/0xb7c
 bpf_dispatcher_nop_func include/linux/bpf.h:790 [inline]
 __bpf_prog_run include/linux/filter.h:628 [inline]
 bpf_prog_run include/linux/filter.h:635 [inline]
 __bpf_trace_run kernel/trace/bpf_trace.c:1880 [inline]
 bpf_trace_run3+0x1d1/0x380 kernel/trace/bpf_trace.c:1918
 __traceiter_workqueue_queue_work+0x79/0xd0 include/trace/events/workqueue.h:23
 trace_workqueue_queue_work include/trace/events/workqueue.h:23 [inline]
 __queue_work+0xc99/0xd00 kernel/workqueue.c:1512
 queue_work_on+0x14b/0x250 kernel/workqueue.c:1559
 rcu_do_batch kernel/rcu/tree.c:2523 [inline]
 rcu_core+0xa15/0x1650 kernel/rcu/tree.c:2763
 __do_softirq+0x3b3/0x93a kernel/softirq.c:558
 invoke_softirq kernel/softirq.c:432 [inline]
 __irq_exit_rcu+0x155/0x240 kernel/softirq.c:637
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:649
 sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1096
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xd4/0x130 kernel/locking/spinlock.c:194
Code: 9c 8f 44 24 20 42 80 3c 23 00 74 08 4c 89 f7 e8 12 e8 a2 f7 f6 44 24 21 02 75 4e 41 f7 c7 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> f7 14 30 f7 65 8b 05 c8 22 db 75 85 c0 74 3f 48 c7 04 24 0e 36
RSP: 0018:ffffc90002b37780 EFLAGS: 00000206
RAX: ef7f1dc0ef4f0100 RBX: 1ffff92000566ef4 RCX: ffffffff913eef03
RDX: dffffc0000000000 RSI: ffffffff8a8b2980 RDI: 0000000000000001
RBP: ffffc90002b37808 R08: ffffffff8186dd10 R09: ffffed1003c9e193
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: 1ffff92000566ef0 R14: ffffc90002b377a0 R15: 0000000000000246
 poll_wait include/linux/poll.h:47 [inline]
 pipe_poll+0xe3/0x4a0 fs/pipe.c:669
 vfs_poll include/linux/poll.h:86 [inline]
 do_pollfd fs/select.c:872 [inline]
 do_poll fs/select.c:920 [inline]
 do_sys_poll+0x77a/0x11f0 fs/select.c:1014
 __do_sys_ppoll fs/select.c:1120 [inline]
 __se_sys_ppoll+0x29c/0x330 fs/select.c:1100
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f5b87fc0ad5
Code: 85 d2 74 0d 0f 10 02 48 8d 54 24 20 0f 11 44 24 20 64 8b 04 25 18 00 00 00 85 c0 75 27 41 b8 08 00 00 00 b8 0f 01 00 00 0f 05 <48> 3d 00 f0 ff ff 76 75 48 8b 15 24 73 0d 00 f7 d8 64 89 02 48 83
RSP: 002b:00007ffdd9f052b0 EFLAGS: 00000246 ORIG_RAX: 000000000000010f
RAX: ffffffffffffffda RBX: 00000000000668a0 RCX: 00007f5b87fc0ad5
RDX: 00007ffdd9f052d0 RSI: 0000000000000004 RDI: 0000557bf3d037d0
RBP: 0000557bf3d023a0 R08: 0000000000000008 R09: 0000000000000000
R10: 00007ffdd9f053b8 R11: 0000000000000246 R12: 0000557bf2a61aa4
R13: 0000000000000001 R14: 0000557bf2a623e8 R15: 00007ffdd9f05338
 </TASK>
----------------
Code disassembly (best guess):
   0:	9c                   	pushf
   1:	8f 44 24 20          	pop    0x20(%rsp)
   5:	42 80 3c 23 00       	cmpb   $0x0,(%rbx,%r12,1)
   a:	74 08                	je     0x14
   c:	4c 89 f7             	mov    %r14,%rdi
   f:	e8 12 e8 a2 f7       	call   0xf7a2e826
  14:	f6 44 24 21 02       	testb  $0x2,0x21(%rsp)
  19:	75 4e                	jne    0x69
  1b:	41 f7 c7 00 02 00 00 	test   $0x200,%r15d
  22:	74 01                	je     0x25
  24:	fb                   	sti
  25:	bf 01 00 00 00       	mov    $0x1,%edi
* 2a:	e8 f7 14 30 f7       	call   0xf7301526 <-- trapping instruction
  2f:	65 8b 05 c8 22 db 75 	mov    %gs:0x75db22c8(%rip),%eax        # 0x75db22fe
  36:	85 c0                	test   %eax,%eax
  38:	74 3f                	je     0x79
  3a:	48                   	rex.W
  3b:	c7                   	.byte 0xc7
  3c:	04 24                	add    $0x24,%al
  3e:	0e                   	(bad)
  3f:	36                   	ss