================================
WARNING: inconsistent lock state
6.9.0-syzkaller-01893-g6bfd2d442af5 #0 Not tainted
--------------------------------
inconsistent {IN-HARDIRQ-W} -> {HARDIRQ-ON-W} usage.
syz-executor.0/23438 [HC0[0]:SC0[0]:HE0:SE1] takes:
ffffffff8e830798 (sync_timeline_list_lock){?...}-{2:2}, at: spin_lock_irq include/linux/spinlock.h:376 [inline]
ffffffff8e830798 (sync_timeline_list_lock){?...}-{2:2}, at: sync_info_debugfs_show+0x36/0x210 drivers/dma-buf/sync_debug.c:147
{IN-HARDIRQ-W} state was registered at:
lock_acquire kernel/locking/lockdep.c:5754 [inline]
lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5719
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162
sync_timeline_debug_remove+0x29/0x1a0 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+0x262/0x340 drivers/dma-buf/sw_sync.c:165
dma_fence_release+0x308/0x560 drivers/dma-buf/dma-fence.c:560
kref_put include/linux/kref.h:65 [inline]
dma_fence_put include/linux/dma-fence.h:297 [inline]
dma_fence_put include/linux/dma-fence.h:294 [inline]
dma_fence_array_release+0x1fa/0x2e0 drivers/dma-buf/dma-fence-array.c:120
dma_fence_release+0x308/0x560 drivers/dma-buf/dma-fence.c:560
kref_put include/linux/kref.h:65 [inline]
dma_fence_put include/linux/dma-fence.h:297 [inline]
dma_fence_put include/linux/dma-fence.h:294 [inline]
irq_dma_fence_array_work+0xa9/0xd0 drivers/dma-buf/dma-fence-array.c:52
irq_work_single+0x1bc/0x260 kernel/irq_work.c:221
irq_work_run_list+0x92/0xc0 kernel/irq_work.c:252
irq_work_run+0x58/0xd0 kernel/irq_work.c:261
__sysvec_irq_work+0x8c/0x410 arch/x86/kernel/irq_work.c:22
instr_sysvec_irq_work arch/x86/kernel/irq_work.c:17 [inline]
sysvec_irq_work+0x90/0xb0 arch/x86/kernel/irq_work.c:17
asm_sysvec_irq_work+0x1a/0x20 arch/x86/include/asm/idtentry.h:738
__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline]
_raw_spin_unlock_irq+0x29/0x50 kernel/locking/spinlock.c:202
spin_unlock_irq include/linux/spinlock.h:401 [inline]
sw_sync_debugfs_release+0x164/0x240 drivers/dma-buf/sw_sync.c:359
__fput+0x270/0xb80 fs/file_table.c:422
task_work_run+0x14e/0x250 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+0x278/0x2a0 kernel/entry/common.c:218
do_syscall_64+0xdc/0x260 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
irq event stamp: 288
hardirqs last enabled at (287): [<ffffffff81f1ccbb>] mod_objcg_state+0x46b/0x770 mm/memcontrol.c:3420
hardirqs last disabled at (288): [<ffffffff8ae05ff5>] __raw_spin_lock_irq include/linux/spinlock_api_smp.h:117 [inline]
hardirqs last disabled at (288): [<ffffffff8ae05ff5>] _raw_spin_lock_irq+0x45/0x50 kernel/locking/spinlock.c:170
softirqs last enabled at (0): [<ffffffff814fb95a>] copy_process+0x222a/0x8fc0 kernel/fork.c:2336
softirqs last disabled at (0): [<0000000000000000>] 0x0
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 ***
3 locks held by syz-executor.0/23438:
#0: ffff88802507fa48 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xeb/0x180 fs/file.c:1191
#1: ffff888043b72e80 (&p->lock){+.+.}-{3:3}, at: seq_read_iter+0xde/0x12c0 fs/seq_file.c:182
#2: ffffffff8e830798 (sync_timeline_list_lock){?...}-{2:2}, at: spin_lock_irq include/linux/spinlock.h:376 [inline]
#2: ffffffff8e830798 (sync_timeline_list_lock){?...}-{2:2}, at: sync_info_debugfs_show+0x36/0x210 drivers/dma-buf/sync_debug.c:147
stack backtrace:
CPU: 2 PID: 23438 Comm: syz-executor.0 Not tainted 6.9.0-syzkaller-01893-g6bfd2d442af5 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114
print_usage_bug kernel/locking/lockdep.c:3971 [inline]
valid_state kernel/locking/lockdep.c:4013 [inline]
mark_lock_irq kernel/locking/lockdep.c:4216 [inline]
mark_lock+0x923/0xc60 kernel/locking/lockdep.c:4678
mark_held_locks+0x9f/0xe0 kernel/locking/lockdep.c:4274
__trace_hardirqs_on_caller kernel/locking/lockdep.c:4292 [inline]
lockdep_hardirqs_on_prepare+0x137/0x420 kernel/locking/lockdep.c:4359
trace_hardirqs_on+0x36/0x40 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+0xf4/0x210 drivers/dma-buf/sync_debug.c:153
seq_read_iter+0x4fa/0x12c0 fs/seq_file.c:230
seq_read+0x390/0x4d0 fs/seq_file.c:162
vfs_read+0x1d4/0xb80 fs/read_write.c:474
ksys_read+0x12f/0x260 fs/read_write.c:619
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcf/0x260 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f08fea7dd69
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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:00007f08ff8220c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007f08febabf80 RCX: 00007f08fea7dd69
RDX: 0000000000002020 RSI: 0000000020000a00 RDI: 0000000000000006
RBP: 00007f08feaca49e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f08febabf80 R15: 00007ffcb3810828
</TASK>