================================ WARNING: inconsistent lock state 6.8.0-syzkaller-08073-g480e035fc4c7 #0 Not tainted -------------------------------- inconsistent {HARDIRQ-ON-W} -> {IN-HARDIRQ-W} usage. syz-executor200/5071 [HC1[1]:SC0[0]:HE0:SE1] takes: ffffffff8ea9c5d8 (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_64+0xfb/0x240 entry_SYSCALL_64_after_hwframe+0x6d/0x75 irq event stamp: 1628 hardirqs last enabled at (1627): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline] hardirqs last enabled at (1627): [] _raw_spin_unlock_irq+0x23/0x50 kernel/locking/spinlock.c:202 hardirqs last disabled at (1628): [] sysvec_irq_work+0xe/0xc0 arch/x86/kernel/irq_work.c:17 softirqs last enabled at (696): [] invoke_softirq kernel/softirq.c:428 [inline] softirqs last enabled at (696): [] __irq_exit_rcu+0xf2/0x1c0 kernel/softirq.c:633 softirqs last disabled at (679): [] invoke_softirq kernel/softirq.c:428 [inline] softirqs last disabled at (679): [] __irq_exit_rcu+0xf2/0x1c0 kernel/softirq.c:633 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-executor200/5071. stack backtrace: CPU: 0 PID: 5071 Comm: syz-executor200 Not tainted 6.8.0-syzkaller-08073-g480e035fc4c7 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024 Call Trace: __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+0x1e4/0x530 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+0xa8/0x3e0 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 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 ba c4 f2 f5 48 89 df e8 72 04 f4 f5 e8 cd 29 1d f6 fb bf 01 00 00 00 02 f1 e5 f5 65 8b 05 53 d5 84 74 85 c0 74 06 5b c3 cc cc cc cc RSP: 0018:ffffc90003a578f0 EFLAGS: 00000286 RAX: c4e6677360525400 RBX: ffff88802e792650 RCX: ffffffff944d9603 RDX: dffffc0000000000 RSI: ffffffff8baac1e0 RDI: 0000000000000001 RBP: ffff888028f18c3c R08: ffffffff8f872cef R09: 1ffffffff1f0e59d R10: dffffc0000000000 R11: fffffbfff1f0e59e R12: ffff88802e792640 R13: ffff888028f18c00 R14: dffffc0000000000 R15: ffff88802e792600 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 exit_task_work include/linux/task_work.h:38 [inline] do_exit+0xa1b/0x27e0 kernel/exit.c:878 do_group_exit+0x207/0x2c0 kernel/exit.c:1027 get_signal+0x176e/0x1850 kernel/signal.c:2907 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:310 exit_to_user_mode_loop kernel/entry/common.c:105 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:201 [inline] syscall_exit_to_user_mode+0xc9/0x360 kernel/entry/common.c:212 do_syscall_64+0x10a/0x240 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x6d/0x75 RIP: 0033:0x7fdccb5afd29 Code: Unable to access opcode bytes at 0x7fdccb5afcff. RSP: 002b:00007fffbdea6c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000007 RAX: fffffffffffffdfc RBX: 0000000000000000 RCX: 00007fdccb5afd29 RDX: 0000000000007ffe RSI: 0000000000000002 RDI: 0000000020000280 RBP: 00000000000f4240 R08: 00000000000000a0 R09: 00000000000000a0 R10: 00000000000000a0 R11: 0000000000000246 R12: 0000000000000001 R13: 00007fffbdea6e88 R14: 00007fffbdea6c90 R15: 00007fffbdea6c80 ---------------- 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 ba c4 f2 f5 call 0xf5f2c4d1 17: 48 89 df mov %rbx,%rdi 1a: e8 72 04 f4 f5 call 0xf5f40491 1f: e8 cd 29 1d f6 call 0xf61d29f1 24: fb sti 25: bf 01 00 00 00 mov $0x1,%edi * 2a: e8 02 f1 e5 f5 call 0xf5e5f131 <-- trapping instruction 2f: 65 8b 05 53 d5 84 74 mov %gs:0x7484d553(%rip),%eax # 0x7484d589 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