================================ WARNING: inconsistent lock state 6.9.0-syzkaller-00967-gcd97950cbcab #0 Not tainted -------------------------------- inconsistent {HARDIRQ-ON-W} -> {IN-HARDIRQ-W} usage. syz-executor823/5102 [HC1[1]:SC0[0]:HE0:SE1] takes: ffffffff8ecb94f8 (sync_timeline_list_lock){?.+.}-{2:2}, at: sync_timeline_debug_remove+0x2c/0x150 drivers/dma-buf/sync_debug.c:31 {HARDIRQ-ON-W} state was registered at: 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+0x158/0x4d0 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+0x204/0xb70 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+0xf5/0x240 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f irq event stamp: 4984 hardirqs last enabled at (4983): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline] hardirqs last enabled at (4983): [] _raw_spin_unlock_irq+0x23/0x50 kernel/locking/spinlock.c:202 hardirqs last disabled at (4984): [] sysvec_irq_work+0xe/0xc0 arch/x86/kernel/irq_work.c:17 softirqs last enabled at (4868): [] spin_unlock_bh include/linux/spinlock.h:396 [inline] softirqs last enabled at (4868): [] __tun_set_ebpf+0x124/0x1c0 drivers/net/tun.c:2302 softirqs last disabled at (4866): [] spin_lock_bh include/linux/spinlock.h:356 [inline] softirqs last disabled at (4866): [] __tun_set_ebpf+0xa0/0x1c0 drivers/net/tun.c:2298 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-executor823/5102. stack backtrace: CPU: 0 PID: 5102 Comm: syz-executor823 Not tainted 6.9.0-syzkaller-00967-gcd97950cbcab #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_usage kernel/locking/lockdep.c:4564 [inline] __lock_acquire+0xb8e/0x1fd0 kernel/locking/lockdep.c:5091 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 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 89 fb 48 83 c7 18 48 8b 74 24 08 e8 6a 8c e7 f5 48 89 df e8 82 cc e8 f5 e8 6d 32 12 f6 fb bf 01 00 00 00 72 91 da f5 65 8b 05 23 b5 78 74 85 c0 74 06 5b c3 cc cc cc cc RSP: 0018:ffffc9000340fbf0 EFLAGS: 00000286 RAX: 7493d02eb864ba00 RBX: ffff888020f8b850 RCX: ffffffff9472d603 RDX: dffffc0000000000 RSI: ffffffff8bcab8a0 RDI: 0000000000000001 RBP: ffff88802cf6293c R08: ffffffff8fa8fc2f R09: 1ffffffff1f51f85 R10: dffffc0000000000 R11: fffffbfff1f51f86 R12: ffff888020f8b840 R13: ffff88802cf62900 R14: dffffc0000000000 R15: ffff888020f8b800 spin_unlock_irq include/linux/spinlock.h:401 [inline] sw_sync_debugfs_release+0x14b/0x1d0 drivers/dma-buf/sw_sync.c:359 __fput+0x429/0x8a0 fs/file_table.c:422 task_work_run+0x24f/0x310 kernel/task_work.c:180 ptrace_notify+0x2d2/0x380 kernel/signal.c:2404 ptrace_report_syscall include/linux/ptrace.h:415 [inline] ptrace_report_syscall_exit include/linux/ptrace.h:477 [inline] syscall_exit_work+0xc6/0x190 kernel/entry/common.c:173 syscall_exit_to_user_mode_prepare kernel/entry/common.c:200 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:205 [inline] syscall_exit_to_user_mode+0x273/0x370 kernel/entry/common.c:218 do_syscall_64+0x102/0x240 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f0eb98565d9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 61 1a 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:00007f0eb97ec238 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 RAX: 0000000000000000 RBX: 00007f0eb98e1438 RCX: 00007f0eb98565d9 RDX: 0000000000000000 RSI: 00000000ffffffff RDI: 0000000000000003 RBP: 00007f0eb98e1430 R08: 00007ffcadb9c3a7 R09: 00007f0eb97ec6c0 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f0eb98ad4c8 ---------------- Code disassembly (best guess): 0: 90 nop 1: f3 0f 1e fa endbr64 5: 53 push %rbx 6: 48 89 fb mov %rdi,%rbx 9: 48 83 c7 18 add $0x18,%rdi d: 48 8b 74 24 08 mov 0x8(%rsp),%rsi 12: e8 6a 8c e7 f5 call 0xf5e78c81 17: 48 89 df mov %rbx,%rdi 1a: e8 82 cc e8 f5 call 0xf5e8cca1 1f: e8 6d 32 12 f6 call 0xf6123291 24: fb sti 25: bf 01 00 00 00 mov $0x1,%edi * 2a: e8 72 91 da f5 call 0xf5da91a1 <-- trapping instruction 2f: 65 8b 05 23 b5 78 74 mov %gs:0x7478b523(%rip),%eax # 0x7478b559 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