================================ WARNING: inconsistent lock state 5.15.160-syzkaller #0 Not tainted -------------------------------- inconsistent {IN-HARDIRQ-W} -> {HARDIRQ-ON-W} usage. syz-executor.0/4524 [HC0[0]:SC0[0]:HE0:SE1] takes: ffff800015cfff38 (sync_timeline_list_lock){?...}-{2:2}, at: spin_lock_irq include/linux/spinlock.h:388 [inline] ffff800015cfff38 (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+0x240/0x77c kernel/locking/lockdep.c:5623 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0xc4/0x14c 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+0x1f0/0x284 drivers/dma-buf/sw_sync.c:144 dma_fence_release+0x180/0x560 drivers/dma-buf/dma-fence.c:548 kref_put include/linux/kref.h:65 [inline] dma_fence_put include/linux/dma-fence.h:279 [inline] dma_fence_array_release+0x120/0x24c drivers/dma-buf/dma-fence-array.c:120 dma_fence_release+0x180/0x560 drivers/dma-buf/dma-fence.c:548 kref_put include/linux/kref.h:65 [inline] dma_fence_put include/linux/dma-fence.h:279 [inline] irq_dma_fence_array_work+0xac/0x160 drivers/dma-buf/dma-fence-array.c:52 irq_work_single+0xbc/0x1e4 kernel/irq_work.c:155 irq_work_run_list kernel/irq_work.c:177 [inline] irq_work_run+0x108/0x25c kernel/irq_work.c:186 do_handle_IPI arch/arm64/kernel/smp.c:925 [inline] ipi_handler+0x108/0x7d4 arch/arm64/kernel/smp.c:948 handle_percpu_devid_irq+0x29c/0x7fc kernel/irq/chip.c:933 generic_handle_irq_desc include/linux/irqdesc.h:158 [inline] handle_irq_desc kernel/irq/irqdesc.c:651 [inline] handle_domain_irq+0xec/0x178 kernel/irq/irqdesc.c:706 gic_handle_irq+0x78/0x1c8 drivers/irqchip/irq-gic-v3.c:758 call_on_irq_stack+0x24/0x4c arch/arm64/kernel/entry.S:899 do_interrupt_handler+0x74/0x94 arch/arm64/kernel/entry-common.c:267 el1_interrupt+0x30/0x58 arch/arm64/kernel/entry-common.c:454 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:470 el1h_64_irq+0x78/0x7c arch/arm64/kernel/entry.S:522 arch_local_irq_enable arch/arm64/include/asm/irqflags.h:35 [inline] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline] _raw_spin_unlock_irq+0xa4/0x134 kernel/locking/spinlock.c:202 spin_unlock_irq include/linux/spinlock.h:413 [inline] sw_sync_debugfs_release+0x134/0x204 drivers/dma-buf/sw_sync.c:321 __fput+0x30c/0x7f0 fs/file_table.c:280 ____fput+0x20/0x30 fs/file_table.c:308 task_work_run+0x130/0x1e4 kernel/task_work.c:164 tracehook_notify_resume include/linux/tracehook.h:189 [inline] do_notify_resume+0x262c/0x32b8 arch/arm64/kernel/signal.c:946 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:133 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:138 [inline] el0_svc+0xfc/0x1f0 arch/arm64/kernel/entry-common.c:609 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 irq event stamp: 174 hardirqs last enabled at (173): [] mod_memcg_lruvec_state include/linux/memcontrol.h:1044 [inline] hardirqs last enabled at (173): [] mod_objcg_mlstate+0x13c/0x228 mm/memcontrol.c:831 hardirqs last disabled at (174): [] __raw_spin_lock_irq include/linux/spinlock_api_smp.h:126 [inline] hardirqs last disabled at (174): [] _raw_spin_lock_irq+0x38/0x13c kernel/locking/spinlock.c:170 softirqs last enabled at (164): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:31 softirqs last disabled at (162): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:18 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.0/4524: #0: ffff0000cad8caf0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x128/0x170 fs/file.c:1088 #1: ffff0000c7a09d58 (&p->lock){+.+.}-{3:3}, at: seq_read_iter+0xac/0xc44 fs/seq_file.c:182 #2: ffff800015cfff38 (sync_timeline_list_lock){?...}-{2:2}, at: spin_lock_irq include/linux/spinlock.h:388 [inline] #2: ffff800015cfff38 (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: 4524 Comm: syz-executor.0 Not tainted 5.15.160-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 Call trace: dump_backtrace+0x0/0x530 arch/arm64/kernel/stacktrace.c:152 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216 __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+0x64c/0x9a8 kernel/locking/lockdep.c:3920 mark_lock_irq+0x980/0xd2c mark_lock+0x258/0x360 kernel/locking/lockdep.c:4591 mark_held_locks kernel/locking/lockdep.c:4193 [inline] __trace_hardirqs_on_caller kernel/locking/lockdep.c:4211 [inline] lockdep_hardirqs_on_prepare+0x300/0x874 kernel/locking/lockdep.c:4278 trace_hardirqs_on+0x2a4/0x50c kernel/trace/trace_preemptirq.c:49 __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline] _raw_spin_unlock_irq+0x9c/0x134 kernel/locking/spinlock.c:202 spin_unlock_irq include/linux/spinlock.h:413 [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+0x388/0x4ec fs/seq_file.c:162 vfs_read+0x278/0xb10 fs/read_write.c:483 ksys_read+0x15c/0x26c fs/read_write.c:623 __do_sys_read fs/read_write.c:633 [inline] __se_sys_read fs/read_write.c:631 [inline] __arm64_sys_read+0x7c/0x90 fs/read_write.c:631 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584