================================ WARNING: inconsistent lock state 6.6.0-rc7-syzkaller-00089-g8de1e7afcc1c #0 Not tainted -------------------------------- inconsistent {IN-HARDIRQ-W} -> {HARDIRQ-ON-W} usage. syz-executor.0/6747 [HC0[0]:SC0[0]:HE0:SE1] takes: ffff80008fc82898 (sync_timeline_list_lock){?.-.}-{2:2}, at: spin_lock_irq include/linux/spinlock.h:376 [inline] ffff80008fc82898 (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+0x23c/0x71c kernel/locking/lockdep.c:5753 __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: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+0x180/0x560 drivers/dma-buf/dma-fence.c:560 kref_put include/linux/kref.h:65 [inline] dma_fence_put include/linux/dma-fence.h:296 [inline] dma_fence_array_release+0x11c/0x24c drivers/dma-buf/dma-fence-array.c:120 dma_fence_release+0x180/0x560 drivers/dma-buf/dma-fence.c:560 kref_put include/linux/kref.h:65 [inline] dma_fence_put include/linux/dma-fence.h:296 [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:929 [inline] ipi_handler+0x198/0x784 arch/arm64/kernel/smp.c:956 handle_percpu_devid_irq+0x2a4/0x804 kernel/irq/chip.c:942 generic_handle_irq_desc include/linux/irqdesc.h:161 [inline] handle_irq_desc kernel/irq/irqdesc.c:672 [inline] generic_handle_domain_irq+0x7c/0xc4 kernel/irq/irqdesc.c:728 __gic_handle_irq drivers/irqchip/irq-gic-v3.c:783 [inline] __gic_handle_irq_from_irqson drivers/irqchip/irq-gic-v3.c:834 [inline] gic_handle_irq+0x6c/0x190 drivers/irqchip/irq-gic-v3.c:878 call_on_irq_stack+0x24/0x4c arch/arm64/kernel/entry.S:886 do_interrupt_handler+0xd4/0x138 arch/arm64/kernel/entry-common.c:276 __el1_irq arch/arm64/kernel/entry-common.c:502 [inline] el1_interrupt+0x34/0x68 arch/arm64/kernel/entry-common.c:517 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:522 el1h_64_irq+0x64/0x68 arch/arm64/kernel/entry.S:591 __daif_local_irq_enable arch/arm64/include/asm/irqflags.h:27 [inline] arch_local_irq_enable arch/arm64/include/asm/irqflags.h:49 [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:321 __fput+0x324/0x7f8 fs/file_table.c:384 ____fput+0x20/0x30 fs/file_table.c:412 task_work_run+0x230/0x2e0 kernel/task_work.c:180 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] do_notify_resume+0x214c/0x393c arch/arm64/kernel/signal.c:1305 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:137 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:144 [inline] el0_svc+0x9c/0x158 arch/arm64/kernel/entry-common.c:679 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595 irq event stamp: 136 hardirqs last enabled at (135): [] mod_objcg_state+0x304/0x4ac mm/memcontrol.c:3223 hardirqs last disabled at (136): [] __raw_spin_lock_irq include/linux/spinlock_api_smp.h:117 [inline] hardirqs last disabled at (136): [] _raw_spin_lock_irq+0x28/0x70 kernel/locking/spinlock.c:170 softirqs last enabled at (114): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (112): [] 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.0/6747: #0: ffff0000d501b9c8 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x11c/0x148 fs/file.c:1064 #1: ffff0000d1b851c8 (&p->lock){+.+.}-{3:3}, at: seq_read_iter+0xac/0xc44 fs/seq_file.c:182 #2: ffff80008fc82898 (sync_timeline_list_lock){?.-.}-{2:2}, at: spin_lock_irq include/linux/spinlock.h:376 [inline] #2: ffff80008fc82898 (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: 6747 Comm: syz-executor.0 Not tainted 6.6.0-rc7-syzkaller-00089-g8de1e7afcc1c #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023 Call trace: dump_backtrace+0x1b8/0x1e4 arch/arm64/kernel/stacktrace.c:233 show_stack+0x2c/0x44 arch/arm64/kernel/stacktrace.c:240 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd0/0x124 lib/dump_stack.c:106 dump_stack+0x1c/0x28 lib/dump_stack.c:113 print_usage_bug+0x698/0x9ac kernel/locking/lockdep.c:4000 mark_lock_irq+0x980/0xd2c mark_lock+0x258/0x360 kernel/locking/lockdep.c:4677 mark_held_locks kernel/locking/lockdep.c:4273 [inline] __trace_hardirqs_on_caller kernel/locking/lockdep.c:4291 [inline] lockdep_hardirqs_on_prepare+0x2fc/0x870 kernel/locking/lockdep.c:4358 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+0x1e8/0x2c0 fs/seq_file.c:162 vfs_read+0x284/0x8d4 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:37 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155 el0_svc+0x54/0x158 arch/arm64/kernel/entry-common.c:678 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595