================================ WARNING: inconsistent lock state 6.4.0-rc7-next-20230623-syzkaller #0 Not tainted -------------------------------- inconsistent {HARDIRQ-ON-W} -> {IN-HARDIRQ-W} usage. syz-executor.4/12609 [HC1[1]:SC0[0]:HE0:SE1] takes: ffffffff8d73adf8 (sync_timeline_list_lock){?.+.}-{2:2}, at: sync_timeline_debug_remove+0x29/0x1a0 drivers/dma-buf/sync_debug.c:31 {HARDIRQ-ON-W} state was registered at: __trace_hardirqs_on_caller kernel/locking/lockdep.c:4299 [inline] lockdep_hardirqs_on_prepare kernel/locking/lockdep.c:4366 [inline] lockdep_hardirqs_on_prepare+0x139/0x410 kernel/locking/lockdep.c:4318 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:400 [inline] sync_print_obj drivers/dma-buf/sync_debug.c:118 [inline] sync_info_debugfs_show+0xef/0x200 drivers/dma-buf/sync_debug.c:153 seq_read_iter+0x4f9/0x12d0 fs/seq_file.c:230 seq_read+0x171/0x210 fs/seq_file.c:162 vfs_read+0x1db/0x8d0 fs/read_write.c:468 ksys_read+0x122/0x250 fs/read_write.c:613 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd irq event stamp: 7818 hardirqs last enabled at (7817): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline] hardirqs last enabled at (7817): [] _raw_spin_unlock_irq+0x23/0x50 kernel/locking/spinlock.c:202 hardirqs last disabled at (7818): [] sysvec_irq_work+0xf/0xc0 arch/x86/kernel/irq_work.c:17 softirqs last enabled at (6958): [] invoke_softirq kernel/softirq.c:427 [inline] softirqs last enabled at (6958): [] __irq_exit_rcu kernel/softirq.c:632 [inline] softirqs last enabled at (6958): [] irq_exit_rcu+0xb7/0x120 kernel/softirq.c:644 softirqs last disabled at (6927): [] invoke_softirq kernel/softirq.c:427 [inline] softirqs last disabled at (6927): [] __irq_exit_rcu kernel/softirq.c:632 [inline] softirqs last disabled at (6927): [] irq_exit_rcu+0xb7/0x120 kernel/softirq.c:644 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(sync_timeline_list_lock); lock(sync_timeline_list_lock); *** DEADLOCK *** no locks held by syz-executor.4/12609. stack backtrace: CPU: 1 PID: 12609 Comm: syz-executor.4 Not tainted 6.4.0-rc7-next-20230623-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106 print_usage_bug kernel/locking/lockdep.c:3978 [inline] valid_state kernel/locking/lockdep.c:4020 [inline] mark_lock_irq kernel/locking/lockdep.c:4223 [inline] mark_lock.part.0+0x1102/0x1960 kernel/locking/lockdep.c:4685 mark_lock kernel/locking/lockdep.c:4649 [inline] mark_usage kernel/locking/lockdep.c:4571 [inline] __lock_acquire+0x16f6/0x5e20 kernel/locking/lockdep.c:5098 lock_acquire kernel/locking/lockdep.c:5761 [inline] lock_acquire+0x1b1/0x520 kernel/locking/lockdep.c:5726 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x3d/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:104 [inline] kref_put include/linux/kref.h:65 [inline] sync_timeline_put drivers/dma-buf/sw_sync.c:116 [inline] timeline_fence_release+0x267/0x340 drivers/dma-buf/sw_sync.c:144 dma_fence_release+0x116/0x560 drivers/dma-buf/dma-fence.c:559 kref_put include/linux/kref.h:65 [inline] dma_fence_put include/linux/dma-fence.h:296 [inline] dma_fence_array_release+0x1fa/0x2d0 drivers/dma-buf/dma-fence-array.c:120 dma_fence_release+0x116/0x560 drivers/dma-buf/dma-fence.c:559 kref_put include/linux/kref.h:65 [inline] dma_fence_put include/linux/dma-fence.h:296 [inline] irq_dma_fence_array_work+0xa9/0xd0 drivers/dma-buf/dma-fence-array.c:52 irq_work_single+0x124/0x260 kernel/irq_work.c:221 irq_work_run_list kernel/irq_work.c:252 [inline] irq_work_run_list+0x91/0xc0 kernel/irq_work.c:235 irq_work_run+0x58/0xd0 kernel/irq_work.c:261 __sysvec_irq_work+0x99/0x2d0 arch/x86/kernel/irq_work.c:22 sysvec_irq_work+0x92/0xc0 arch/x86/kernel/irq_work.c:17 asm_sysvec_irq_work+0x1a/0x20 arch/x86/include/asm/idtentry.h:671 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 55 48 8b 74 24 08 48 89 fd 48 83 c7 18 e8 8a 80 42 f7 48 89 ef e8 62 f0 42 f7 e8 bd be 67 f7 fb bf 01 00 00 00 a2 ab 34 f7 65 8b 05 93 c7 df 75 85 c0 74 02 5d c3 e8 50 8d dc RSP: 0018:ffffc9000bccfa88 EFLAGS: 00000202 RAX: 0000000000001e89 RBX: 00000000ffffffff RCX: 1ffffffff1d544c9 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001 RBP: ffff88807879b650 R08: 0000000000000001 R09: 0000000000000001 R10: ffffffff8eaa57d7 R11: 0000000000000001 R12: ffff88807879b600 R13: dffffc0000000000 R14: ffff88807879b600 R15: ffff88807879b650 spin_unlock_irq include/linux/spinlock.h:400 [inline] sw_sync_debugfs_release+0x162/0x240 drivers/dma-buf/sw_sync.c:321 __fput+0x40c/0xad0 fs/file_table.c:378 task_work_run+0x16f/0x270 kernel/task_work.c:179 exit_task_work include/linux/task_work.h:38 [inline] do_exit+0xa9a/0x29a0 kernel/exit.c:874 do_group_exit+0xd4/0x2a0 kernel/exit.c:1024 get_signal+0x249b/0x25f0 kernel/signal.c:2877 arch_do_signal_or_restart+0x79/0x5c0 arch/x86/kernel/signal.c:309 exit_to_user_mode_loop kernel/entry/common.c:168 [inline] exit_to_user_mode_prepare+0x11f/0x240 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline] syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:297 do_syscall_64+0x46/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fbf93a8c389 Code: Unable to access opcode bytes at 0x7fbf93a8c35f. RSP: 002b:00007fbf9484e168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: 0000000000000000 RBX: 00007fbf93bac120 RCX: 00007fbf93a8c389 RDX: 0000000020000080 RSI: 00000000c0303e03 RDI: 0000000000000022 RBP: 00007fbf93ad7493 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd91165e1f R14: 00007fbf9484e300 R15: 0000000000022000 ---------------- Code disassembly (best guess): 0: 90 nop 1: f3 0f 1e fa endbr64 5: 55 push %rbp 6: 48 8b 74 24 08 mov 0x8(%rsp),%rsi b: 48 89 fd mov %rdi,%rbp e: 48 83 c7 18 add $0x18,%rdi 12: e8 8a 80 42 f7 callq 0xf74280a1 17: 48 89 ef mov %rbp,%rdi 1a: e8 62 f0 42 f7 callq 0xf742f081 1f: e8 bd be 67 f7 callq 0xf767bee1 24: fb sti 25: bf 01 00 00 00 mov $0x1,%edi * 2a: e8 a2 ab 34 f7 callq 0xf734abd1 <-- trapping instruction 2f: 65 8b 05 93 c7 df 75 mov %gs:0x75dfc793(%rip),%eax # 0x75dfc7c9 36: 85 c0 test %eax,%eax 38: 74 02 je 0x3c 3a: 5d pop %rbp 3b: c3 retq 3c: e8 .byte 0xe8 3d: 50 push %rax 3e: 8d (bad) 3f: dc .byte 0xdc