================================ WARNING: inconsistent lock state 6.10.0-rc1-syzkaller-00027-g4a4be1ad3a6e #0 Not tainted -------------------------------- inconsistent {IN-HARDIRQ-W} -> {HARDIRQ-ON-W} usage. syz-executor.4/10257 [HC0[0]:SC0[0]:HE0:SE1] takes: ffffffff8ecc8038 (sync_timeline_list_lock){?...}-{2:2}, at: spin_lock_irq include/linux/spinlock.h:376 [inline] ffffffff8ecc8038 (sync_timeline_list_lock){?...}-{2:2}, at: sync_info_debugfs_show+0x99/0x4d0 drivers/dma-buf/sync_debug.c:147 {IN-HARDIRQ-W} state was registered at: lock_acquire+0x1ed/0x550 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+0xb8/0x430 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 __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline] _raw_spin_unlock_irq+0x29/0x50 kernel/locking/spinlock.c:202 spin_unlock_irq include/linux/spinlock.h:401 [inline] sw_sync_debugfs_release+0x14b/0x1d0 drivers/dma-buf/sw_sync.c:359 __fput+0x406/0x8b0 fs/file_table.c:422 __do_sys_close fs/open.c:1555 [inline] __se_sys_close fs/open.c:1540 [inline] __x64_sys_close+0x7f/0x110 fs/open.c:1540 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f irq event stamp: 43484 hardirqs last enabled at (43483): [] mod_objcg_state+0x583/0x930 mm/memcontrol.c:3536 hardirqs last disabled at (43484): [] __raw_spin_lock_irq include/linux/spinlock_api_smp.h:117 [inline] hardirqs last disabled at (43484): [] _raw_spin_lock_irq+0xad/0x120 kernel/locking/spinlock.c:170 softirqs last enabled at (42322): [] __do_softirq kernel/softirq.c:588 [inline] softirqs last enabled at (42322): [] invoke_softirq kernel/softirq.c:428 [inline] softirqs last enabled at (42322): [] __irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637 softirqs last disabled at (42277): [] __do_softirq kernel/softirq.c:588 [inline] softirqs last disabled at (42277): [] invoke_softirq kernel/softirq.c:428 [inline] softirqs last disabled at (42277): [] __irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637 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.4/10257: #0: ffff88807e3c59c8 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x24e/0x310 fs/file.c:1191 #1: ffff888029c11668 (&p->lock){+.+.}-{3:3}, at: seq_read_iter+0xb7/0xd60 fs/seq_file.c:182 #2: ffffffff8ecc8038 (sync_timeline_list_lock){?...}-{2:2}, at: spin_lock_irq include/linux/spinlock.h:376 [inline] #2: ffffffff8ecc8038 (sync_timeline_list_lock){?...}-{2:2}, at: sync_info_debugfs_show+0x99/0x4d0 drivers/dma-buf/sync_debug.c:147 stack backtrace: CPU: 0 PID: 10257 Comm: syz-executor.4 Not tainted 6.10.0-rc1-syzkaller-00027-g4a4be1ad3a6e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 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_held_locks kernel/locking/lockdep.c:4274 [inline] __trace_hardirqs_on_caller kernel/locking/lockdep.c:4292 [inline] lockdep_hardirqs_on_prepare+0x282/0x780 kernel/locking/lockdep.c:4359 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+0x15d/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+0x204/0xbd0 fs/read_write.c:474 ksys_read+0x1a0/0x2c0 fs/read_write.c:619 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fcb54e7cee9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fcb55b2d0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 00007fcb54fb3fa0 RCX: 00007fcb54e7cee9 RDX: 0000000000002020 RSI: 00000000200040c0 RDI: 0000000000000005 RBP: 00007fcb54ec947f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007fcb54fb3fa0 R15: 00007fcb550dfa98