================================ WARNING: inconsistent lock state 6.9.0-rc5-syzkaller-00036-g9d1ddab261f3 #0 Not tainted -------------------------------- inconsistent {HARDIRQ-ON-W} -> {IN-HARDIRQ-W} usage. syz-executor.1/5980 [HC1[1]:SC0[0]:HE0:SE1] takes: ffffffff8e62b838 (sync_timeline_list_lock){?.+.}-{2:2}, at: sync_timeline_debug_remove+0x29/0x1a0 drivers/dma-buf/sync_debug.c:31 {HARDIRQ-ON-W} state was registered at: __trace_hardirqs_on_caller kernel/locking/lockdep.c:4292 [inline] lockdep_hardirqs_on_prepare+0x137/0x420 kernel/locking/lockdep.c:4359 trace_hardirqs_on+0x36/0x40 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+0xef/0x200 drivers/dma-buf/sync_debug.c:153 seq_read_iter+0x4fa/0x12c0 fs/seq_file.c:230 seq_read+0x390/0x4d0 fs/seq_file.c:162 vfs_read+0x1d4/0xb80 fs/read_write.c:474 ksys_read+0x12f/0x260 fs/read_write.c:619 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcf/0x260 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f irq event stamp: 968 hardirqs last enabled at (967): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline] hardirqs last enabled at (967): [] _raw_spin_unlock_irq+0x23/0x50 kernel/locking/spinlock.c:202 hardirqs last disabled at (968): [] sysvec_irq_work+0xe/0xb0 arch/x86/kernel/irq_work.c:17 softirqs last enabled at (262): [] rcu_lock_release include/linux/rcupdate.h:339 [inline] softirqs last enabled at (262): [] rcu_read_unlock_bh include/linux/rcupdate.h:849 [inline] softirqs last enabled at (262): [] __dev_queue_xmit+0x862/0x40f0 net/core/dev.c:4368 softirqs last disabled at (256): [] local_bh_disable include/linux/bottom_half.h:20 [inline] softirqs last disabled at (256): [] rcu_read_lock_bh include/linux/rcupdate.h:833 [inline] softirqs last disabled at (256): [] __dev_queue_xmit+0x244/0x40f0 net/core/dev.c:4266 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(sync_timeline_list_lock); lock(sync_timeline_list_lock); *** DEADLOCK *** no locks held by syz-executor.1/5980. stack backtrace: CPU: 3 PID: 5980 Comm: syz-executor.1 Not tainted 6.9.0-rc5-syzkaller-00036-g9d1ddab261f3 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114 print_usage_bug kernel/locking/lockdep.c:3971 [inline] valid_state kernel/locking/lockdep.c:4013 [inline] mark_lock_irq kernel/locking/lockdep.c:4216 [inline] mark_lock+0x923/0xc60 kernel/locking/lockdep.c:4678 mark_usage kernel/locking/lockdep.c:4564 [inline] __lock_acquire+0x1359/0x3b30 kernel/locking/lockdep.c:5091 lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5719 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162 sync_timeline_debug_remove+0x29/0x1a0 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+0x262/0x340 drivers/dma-buf/sw_sync.c:165 dma_fence_release+0x308/0x560 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_put include/linux/dma-fence.h:294 [inline] dma_fence_array_release+0x1fa/0x2e0 drivers/dma-buf/dma-fence-array.c:120 dma_fence_release+0x308/0x560 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_put include/linux/dma-fence.h:294 [inline] irq_dma_fence_array_work+0xa9/0xd0 drivers/dma-buf/dma-fence-array.c:52 irq_work_single+0x1bc/0x260 kernel/irq_work.c:221 irq_work_run_list+0x92/0xc0 kernel/irq_work.c:252 irq_work_run+0x58/0xd0 kernel/irq_work.c:261 __sysvec_irq_work+0x8c/0x410 arch/x86/kernel/irq_work.c:22 instr_sysvec_irq_work arch/x86/kernel/irq_work.c:17 [inline] sysvec_irq_work+0x90/0xb0 arch/x86/kernel/irq_work.c:17 asm_sysvec_irq_work+0x1a/0x20 arch/x86/include/asm/idtentry.h:738 RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline] RIP: 0010:_raw_spin_unlock_irq+0x29/0x50 kernel/locking/spinlock.c:202 Code: 90 f3 0f 1e fa 53 48 8b 74 24 08 48 89 fb 48 83 c7 18 e8 ba ee 8c f6 48 89 df e8 12 6b 8d f6 e8 5d f1 b5 f6 fb bf 01 00 00 00 e2 a8 7e f6 65 8b 05 c3 eb 24 75 85 c0 74 06 5b c3 cc cc cc cc RSP: 0018:ffffc90003a1fba0 EFLAGS: 00000202 RAX: 00000000000003c7 RBX: ffff88801ea15a50 RCX: 1ffffffff1f3e149 RDX: 0000000000000000 RSI: ffffffff8b0cae00 RDI: 0000000000000001 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001 R10: ffffffff8f9f4cd7 R11: 0000000000000001 R12: ffff88801ea15a00 R13: dffffc0000000000 R14: ffff88801ea15a00 R15: ffff88801ea15a50 spin_unlock_irq include/linux/spinlock.h:401 [inline] sw_sync_debugfs_release+0x164/0x240 drivers/dma-buf/sw_sync.c:359 __fput+0x270/0xb80 fs/file_table.c:422 task_work_run+0x14e/0x250 kernel/task_work.c:180 get_signal+0x1ca/0x2710 kernel/signal.c:2683 arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:310 exit_to_user_mode_loop kernel/entry/common.c:111 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x14a/0x2a0 kernel/entry/common.c:218 do_syscall_64+0xdc/0x260 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7ffad8a7dea9 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:00007ffad97e8f98 EFLAGS: 00000246 ORIG_RAX: 00000000000001b3 RAX: fffffffffffffff4 RBX: 00000000000000aa RCX: 00007ffad8a7dea9 RDX: 00007ffad97e8fb0 RSI: 00000000000000aa RDI: 00007ffad97e8fb0 RBP: 00007ffad8aca4a4 R08: 0000000000000000 R09: 00000000000000aa R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007ffad8bac050 R15: 00007fffbe3fd2a8 ---------------- Code disassembly (best guess): 0: 90 nop 1: f3 0f 1e fa endbr64 5: 53 push %rbx 6: 48 8b 74 24 08 mov 0x8(%rsp),%rsi b: 48 89 fb mov %rdi,%rbx e: 48 83 c7 18 add $0x18,%rdi 12: e8 ba ee 8c f6 call 0xf68ceed1 17: 48 89 df mov %rbx,%rdi 1a: e8 12 6b 8d f6 call 0xf68d6b31 1f: e8 5d f1 b5 f6 call 0xf6b5f181 24: fb sti 25: bf 01 00 00 00 mov $0x1,%edi * 2a: e8 e2 a8 7e f6 call 0xf67ea911 <-- trapping instruction 2f: 65 8b 05 c3 eb 24 75 mov %gs:0x7524ebc3(%rip),%eax # 0x7524ebf9 36: 85 c0 test %eax,%eax 38: 74 06 je 0x40 3a: 5b pop %rbx 3b: c3 ret 3c: cc int3 3d: cc int3 3e: cc int3 3f: cc int3