================================ WARNING: inconsistent lock state 6.9.0-rc6-syzkaller-g78186bd77b47 #0 Not tainted -------------------------------- inconsistent {IN-HARDIRQ-W} -> {HARDIRQ-ON-W} usage. syz-executor.4/8881 [HC0[0]:SC0[0]:HE0:SE1] takes: ffff800090a60598 (sync_timeline_list_lock){?...}-{2:2}, at: spin_lock_irq include/linux/spinlock.h:376 [inline] ffff800090a60598 (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+0x248/0x73c kernel/locking/lockdep.c:5754 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x5c/0x7c 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:125 [inline] kref_put include/linux/kref.h:65 [inline] sync_timeline_put drivers/dma-buf/sw_sync.c:137 [inline] timeline_fence_release+0x1e8/0x270 drivers/dma-buf/sw_sync.c:165 dma_fence_release+0x198/0x58c 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_array_release+0x11c/0x24c drivers/dma-buf/dma-fence-array.c:120 dma_fence_release+0x198/0x58c 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] irq_dma_fence_array_work+0x94/0x130 drivers/dma-buf/dma-fence-array.c:52 irq_work_single+0xbc/0x1c0 kernel/irq_work.c:221 irq_work_run_list kernel/irq_work.c:252 [inline] irq_work_run+0x104/0x254 kernel/irq_work.c:261 do_handle_IPI arch/arm64/kernel/smp.c:930 [inline] ipi_handler+0x1b0/0x7dc arch/arm64/kernel/smp.c:957 handle_percpu_devid_irq+0x174/0x308 kernel/irq/chip.c:942 generic_handle_irq_desc include/linux/irqdesc.h:161 [inline] handle_irq_desc kernel/irq/irqdesc.c:688 [inline] generic_handle_domain_irq+0x7c/0xc4 kernel/irq/irqdesc.c:744 __gic_handle_irq drivers/irqchip/irq-gic-v3.c:771 [inline] __gic_handle_irq_from_irqson drivers/irqchip/irq-gic-v3.c:822 [inline] gic_handle_irq+0x6c/0x190 drivers/irqchip/irq-gic-v3.c:866 call_on_irq_stack+0x24/0x4c arch/arm64/kernel/entry.S:889 do_interrupt_handler+0xd4/0x138 arch/arm64/kernel/entry-common.c:310 __el1_irq arch/arm64/kernel/entry-common.c:536 [inline] el1_interrupt+0x34/0x68 arch/arm64/kernel/entry-common.c:551 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:556 el1h_64_irq+0x64/0x68 arch/arm64/kernel/entry.S:594 __daif_local_irq_enable arch/arm64/include/asm/irqflags.h:26 [inline] arch_local_irq_enable arch/arm64/include/asm/irqflags.h:48 [inline] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline] _raw_spin_unlock_irq+0x34/0x80 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:359 __fput+0x30c/0x738 fs/file_table.c:422 ____fput+0x20/0x30 fs/file_table.c:450 task_work_run+0x230/0x2e0 kernel/task_work.c:180 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] do_notify_resume+0x178/0x1f4 arch/arm64/kernel/entry-common.c:151 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:169 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:178 [inline] el0_svc+0xac/0x168 arch/arm64/kernel/entry-common.c:713 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598 irq event stamp: 610 hardirqs last enabled at (609): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] hardirqs last enabled at (609): [] _raw_spin_unlock_irqrestore+0x38/0x98 kernel/locking/spinlock.c:194 hardirqs last disabled at (610): [] __raw_spin_lock_irq include/linux/spinlock_api_smp.h:117 [inline] hardirqs last disabled at (610): [] _raw_spin_lock_irq+0x28/0x70 kernel/locking/spinlock.c:170 softirqs last enabled at (588): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (586): [] 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.4/8881: #0: ffff0000d91820c8 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x218/0x2a4 fs/file.c:1191 #1: ffff0000d3eea540 (&p->lock){+.+.}-{3:3}, at: seq_read_iter+0xac/0xc44 fs/seq_file.c:182 #2: ffff800090a60598 (sync_timeline_list_lock){?...}-{2:2}, at: spin_lock_irq include/linux/spinlock.h:376 [inline] #2: ffff800090a60598 (sync_timeline_list_lock){?...}-{2:2}, at: sync_info_debugfs_show+0x9c/0x464 drivers/dma-buf/sync_debug.c:147 stack backtrace: CPU: 0 PID: 8881 Comm: syz-executor.4 Not tainted 6.9.0-rc6-syzkaller-g78186bd77b47 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 Call trace: dump_backtrace+0x1b8/0x1e4 arch/arm64/kernel/stacktrace.c:317 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:324 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xe4/0x150 lib/dump_stack.c:114 dump_stack+0x1c/0x28 lib/dump_stack.c:123 print_usage_bug+0x698/0x9ac kernel/locking/lockdep.c:4001 mark_lock_irq+0x980/0xd2c mark_lock+0x258/0x360 kernel/locking/lockdep.c:4678 mark_held_locks kernel/locking/lockdep.c:4274 [inline] __trace_hardirqs_on_caller kernel/locking/lockdep.c:4292 [inline] lockdep_hardirqs_on_prepare+0x2fc/0x870 kernel/locking/lockdep.c:4359 trace_hardirqs_on+0x164/0x28c kernel/trace/trace_preemptirq.c:61 __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline] _raw_spin_unlock_irq+0x30/0x80 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+0x2ec/0x434 fs/seq_file.c:162 vfs_read+0x230/0x954 fs/read_write.c:474 ksys_read+0x15c/0x26c fs/read_write.c:619 __do_sys_read fs/read_write.c:629 [inline] __se_sys_read fs/read_write.c:627 [inline] __arm64_sys_read+0x7c/0x90 fs/read_write.c:627 __invoke_syscall arch/arm64/kernel/syscall.c:34 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:48 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:133 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:152 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:712 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598