================================ WARNING: inconsistent lock state 6.1.90-syzkaller #0 Not tainted -------------------------------- inconsistent {IN-HARDIRQ-W} -> {HARDIRQ-ON-W} usage. syz-executor.1/6039 [HC0[0]:SC0[0]:HE0:SE1] takes: ffff800016e9c9f8 (sync_timeline_list_lock){?...}-{2:2}, at: spin_lock_irq include/linux/spinlock.h:376 [inline] ffff800016e9c9f8 (sync_timeline_list_lock){?...}-{2:2}, at: sync_info_debugfs_show+0x9c/0x464 drivers/dma-buf/sync_debug.c:147 {IN-HARDIRQ-W} state was registered at: lock_acquire+0x26c/0x7cc kernel/locking/lockdep.c:5662 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x6c/0xb4 kernel/locking/spinlock.c:162 sync_timeline_debug_remove+0x38/0x130 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+0x1e8/0x270 drivers/dma-buf/sw_sync.c:144 dma_fence_release+0x1a4/0x5f8 drivers/dma-buf/dma-fence.c:560 kref_put include/linux/kref.h:65 [inline] dma_fence_put include/linux/dma-fence.h:276 [inline] dma_fence_array_release+0x11c/0x24c drivers/dma-buf/dma-fence-array.c:120 dma_fence_release+0x1a4/0x5f8 drivers/dma-buf/dma-fence.c:560 kref_put include/linux/kref.h:65 [inline] dma_fence_put include/linux/dma-fence.h:276 [inline] irq_dma_fence_array_work+0xa0/0x13c drivers/dma-buf/dma-fence-array.c:52 irq_work_single+0xbc/0x1d4 kernel/irq_work.c:211 irq_work_run_list kernel/irq_work.c:242 [inline] irq_work_run+0x108/0x25c kernel/irq_work.c:251 do_handle_IPI arch/arm64/kernel/smp.c:899 [inline] ipi_handler+0x108/0x86c arch/arm64/kernel/smp.c:922 handle_percpu_devid_irq+0x174/0x354 kernel/irq/chip.c:930 generic_handle_irq_desc include/linux/irqdesc.h:158 [inline] handle_irq_desc kernel/irq/irqdesc.c:651 [inline] generic_handle_domain_irq+0x7c/0xc4 kernel/irq/irqdesc.c:707 __gic_handle_irq drivers/irqchip/irq-gic-v3.c:737 [inline] __gic_handle_irq_from_irqson drivers/irqchip/irq-gic-v3.c:788 [inline] gic_handle_irq+0x70/0x1e4 drivers/irqchip/irq-gic-v3.c:832 call_on_irq_stack+0x24/0x4c arch/arm64/kernel/entry.S:893 do_interrupt_handler+0xd4/0x138 arch/arm64/kernel/entry-common.c:274 __el1_irq arch/arm64/kernel/entry-common.c:471 [inline] el1_interrupt+0x34/0x68 arch/arm64/kernel/entry-common.c:486 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:491 el1h_64_irq+0x64/0x68 arch/arm64/kernel/entry.S:581 arch_local_irq_enable arch/arm64/include/asm/irqflags.h:35 [inline] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline] _raw_spin_unlock_irq+0x44/0x90 kernel/locking/spinlock.c:202 spin_unlock_irq include/linux/spinlock.h:401 [inline] sw_sync_debugfs_release+0x134/0x1f0 drivers/dma-buf/sw_sync.c:321 __fput+0x30c/0x7bc fs/file_table.c:320 ____fput+0x20/0x30 fs/file_table.c:348 task_work_run+0x240/0x2f0 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] do_notify_resume+0x2148/0x3474 arch/arm64/kernel/signal.c:1132 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:137 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:142 [inline] el0_svc+0x9c/0x168 arch/arm64/kernel/entry-common.c:638 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 irq event stamp: 2074 hardirqs last enabled at (2073): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] hardirqs last enabled at (2073): [] _raw_spin_unlock_irqrestore+0x48/0xac kernel/locking/spinlock.c:194 hardirqs last disabled at (2074): [] __raw_spin_lock_irq include/linux/spinlock_api_smp.h:117 [inline] hardirqs last disabled at (2074): [] _raw_spin_lock_irq+0x34/0x9c kernel/locking/spinlock.c:170 softirqs last enabled at (2050): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (2048): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(sync_timeline_list_lock); lock(sync_timeline_list_lock ); *** DEADLOCK *** 3 locks held by syz-executor.1/6039: #0: ffff0000d0082368 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x124/0x16c fs/file.c:1062 #1: ffff0000ccf341c8 (&p->lock){+.+.}-{3:3}, at: seq_read_iter+0xac/0xc44 fs/seq_file.c:182 #2: ffff800016e9c9f8 (sync_timeline_list_lock){?...}-{2:2}, at: spin_lock_irq include/linux/spinlock.h:376 [inline] #2: ffff800016e9c9f8 (sync_timeline_list_lock){?...}-{2:2}, at: sync_info_debugfs_show+0x9c/0x464 drivers/dma-buf/sync_debug.c:147 stack backtrace: CPU: 1 PID: 6039 Comm: syz-executor.1 Not tainted 6.1.90-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 Call trace: dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106 dump_stack+0x1c/0x58 lib/dump_stack.c:113 print_usage_bug+0x654/0x9b0 kernel/locking/lockdep.c:3957 mark_lock_irq+0x980/0xd2c mark_lock+0x258/0x360 kernel/locking/lockdep.c:4628 mark_held_locks kernel/locking/lockdep.c:4230 [inline] __trace_hardirqs_on_caller kernel/locking/lockdep.c:4248 [inline] lockdep_hardirqs_on_prepare+0x300/0x874 kernel/locking/lockdep.c:4315 trace_hardirqs_on+0x184/0x2d4 kernel/trace/trace_preemptirq.c:49 __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline] _raw_spin_unlock_irq+0x3c/0x90 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+0x16c/0x464 drivers/dma-buf/sync_debug.c:153 seq_read_iter+0x3e0/0xc44 fs/seq_file.c:230 seq_read+0x1e8/0x2c0 fs/seq_file.c:162 vfs_read+0x280/0x8ac fs/read_write.c:468 ksys_read+0x15c/0x26c fs/read_write.c:613 __do_sys_read fs/read_write.c:623 [inline] __se_sys_read fs/read_write.c:621 [inline] __arm64_sys_read+0x7c/0x90 fs/read_write.c:621 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x64/0x218 arch/arm64/kernel/syscall.c:206 el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585