syzbot

================================
WARNING: inconsistent lock state
6.9.0-rc5-syzkaller-00042-ge88c4cfcb7b8 #0 Not tainted
--------------------------------
inconsistent {HARDIRQ-ON-W} -> {IN-HARDIRQ-W} usage.
syz-executor351/5086 [HC1[1]:SC0[0]:HE0:SE1] takes:
ffffffff8ecb92b8 (sync_timeline_list_lock){?.+.}-{2:2}, at: sync_timeline_debug_remove+0x2c/0x150 drivers/dma-buf/sync_debug.c:31
{HARDIRQ-ON-W} state was registered at:
  trace_hardirqs_on+0x28/0x40 kernel/trace/trace_preemptirq.c:61
  __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline]
  _raw_spin_unlock_irq+0x23/0x50 kernel/locking/spinlock.c:202
  spin_unlock_irq include/linux/spinlock.h:401 [inline]
  sync_print_obj drivers/dma-buf/sync_debug.c:118 [inline]
  sync_info_debugfs_show+0x158/0x4d0 drivers/dma-buf/sync_debug.c:153
  seq_read_iter+0x445/0xd60 fs/seq_file.c:230
  seq_read+0x3a4/0x4f0 fs/seq_file.c:162
  vfs_read+0x204/0xb70 fs/read_write.c:474
  ksys_read+0x1a0/0x2c0 fs/read_write.c:619
  do_syscall_x64 arch/x86/entry/common.c:52 [inline]
  do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
  entry_SYSCALL_64_after_hwframe+0x77/0x7f
irq event stamp: 5634
hardirqs last  enabled at (5633): [<ffffffff8b8aa933>] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline]
hardirqs last  enabled at (5633): [<ffffffff8b8aa933>] _raw_spin_unlock_irq+0x23/0x50 kernel/locking/spinlock.c:202
hardirqs last disabled at (5634): [<ffffffff8b7fa8be>] sysvec_irq_work+0xe/0xc0 arch/x86/kernel/irq_work.c:17
softirqs last  enabled at (5514): [<ffffffff86636fb4>] spin_unlock_bh include/linux/spinlock.h:396 [inline]
softirqs last  enabled at (5514): [<ffffffff86636fb4>] __tun_set_ebpf+0x124/0x1c0 drivers/net/tun.c:2302
softirqs last disabled at (5512): [<ffffffff86636f30>] spin_lock_bh include/linux/spinlock.h:356 [inline]
softirqs last disabled at (5512): [<ffffffff86636f30>] __tun_set_ebpf+0xa0/0x1c0 drivers/net/tun.c:2298

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

       CPU0
       ----
  lock(sync_timeline_list_lock);
  <Interrupt>
    lock(sync_timeline_list_lock);

 *** DEADLOCK ***

no locks held by syz-executor351/5086.

stack backtrace:
CPU: 1 PID: 5086 Comm: syz-executor351 Not tainted 6.9.0-rc5-syzkaller-00042-ge88c4cfcb7b8 #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+0x241/0x360 lib/dump_stack.c:114
 valid_state+0x13a/0x1c0 kernel/locking/lockdep.c:4013
 mark_lock_irq+0xbb/0xc20 kernel/locking/lockdep.c:4216
 mark_lock+0x223/0x350 kernel/locking/lockdep.c:4678
 mark_usage kernel/locking/lockdep.c:4564 [inline]
 __lock_acquire+0xb8e/0x1fd0 kernel/locking/lockdep.c:5091
 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162
 sync_timeline_debug_remove+0x2c/0x150 drivers/dma-buf/sync_debug.c:31
 sync_timeline_free drivers/dma-buf/sw_sync.c:125 [inline]
 kref_put include/linux/kref.h:65 [inline]
 sync_timeline_put drivers/dma-buf/sw_sync.c:137 [inline]
 timeline_fence_release+0x204/0x250 drivers/dma-buf/sw_sync.c:165
 kref_put include/linux/kref.h:65 [inline]
 dma_fence_put include/linux/dma-fence.h:297 [inline]
 dma_fence_array_release+0x13e/0x240 drivers/dma-buf/dma-fence-array.c:120
 irq_work_single+0xe2/0x240 kernel/irq_work.c:221
 irq_work_run_list kernel/irq_work.c:252 [inline]
 irq_work_run+0x18b/0x350 kernel/irq_work.c:261
 __sysvec_irq_work+0xb8/0x430 arch/x86/kernel/irq_work.c:22
 instr_sysvec_irq_work arch/x86/kernel/irq_work.c:17 [inline]
 sysvec_irq_work+0x9e/0xc0 arch/x86/kernel/irq_work.c:17
 </IRQ>
 <TASK>
 asm_sysvec_irq_work+0x1a/0x20 arch/x86/include/asm/idtentry.h:738
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x29/0x50 kernel/locking/spinlock.c:202
Code: 90 f3 0f 1e fa 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 3a f8 e7 f5 48 89 df e8 52 38 e9 f5 e8 1d 95 12 f6 fb bf 01 00 00 00 <e8> 12 fe da f5 65 8b 05 83 2a 79 74 85 c0 74 06 5b c3 cc cc cc cc
RSP: 0018:ffffc9000350fd10 EFLAGS: 00000282
RAX: f4dbaf4b64d7bd00 RBX: ffff88801f09d650 RCX: ffffffff9472c603
RDX: dffffc0000000000 RSI: ffffffff8bcab8a0 RDI: 0000000000000001
RBP: ffff888079e43a3c R08: ffffffff8fa8fdaf R09: 1ffffffff1f51fb5
R10: dffffc0000000000 R11: fffffbfff1f51fb6 R12: ffff88801f09d640
R13: ffff888079e43a00 R14: dffffc0000000000 R15: ffff88801f09d600
 spin_unlock_irq include/linux/spinlock.h:401 [inline]
 sw_sync_debugfs_release+0x14b/0x1d0 drivers/dma-buf/sw_sync.c:359
 __fput+0x429/0x8a0 fs/file_table.c:422
 task_work_run+0x24f/0x310 kernel/task_work.c:180
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x168/0x370 kernel/entry/common.c:218
 do_syscall_64+0x102/0x240 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f809f78a619
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 61 1a 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f809f720238 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007f809f815438 RCX: 00007f809f78a619
RDX: 0000000000000000 RSI: 00000000ffffffff RDI: 0000000000000003
----------------
Code disassembly (best guess):
   0:	90                   	nop
   1:	f3 0f 1e fa          	endbr64
   5:	53                   	push   %rbx
   6:	48 89 fb             	mov    %rdi,%rbx
   9:	48 83 c7 18          	add    $0x18,%rdi
   d:	48 8b 74 24 08       	mov    0x8(%rsp),%rsi
  12:	e8 3a f8 e7 f5       	call   0xf5e7f851
  17:	48 89 df             	mov    %rbx,%rdi
  1a:	e8 52 38 e9 f5       	call   0xf5e93871
  1f:	e8 1d 95 12 f6       	call   0xf6129541
  24:	fb                   	sti
  25:	bf 01 00 00 00       	mov    $0x1,%edi
* 2a:	e8 12 fe da f5       	call   0xf5dafe41 <-- trapping instruction
  2f:	65 8b 05 83 2a 79 74 	mov    %gs:0x74792a83(%rip),%eax        # 0x74792ab9
  36:	85 c0                	test   %eax,%eax
  38:	74 06                	je     0x40
  3a:	5b                   	pop    %rbx
  3b:	c3                   	ret
  3c:	cc                   	int3
  3d:	cc                   	int3
  3e:	cc                   	int3
  3f:	cc                   	int3