================================ WARNING: inconsistent lock state 6.9.0-rc5-syzkaller-00042-ge88c4cfcb7b8 #0 Not tainted -------------------------------- inconsistent {HARDIRQ-ON-W} -> {IN-HARDIRQ-W} usage. syz-executor351/5086 [HC1[1]:SC0[0]:HE0:SE1] takes: ffffffff8ecb92b8 (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: 5634 hardirqs last enabled at (5633): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline] hardirqs last enabled at (5633): [] _raw_spin_unlock_irq+0x23/0x50 kernel/locking/spinlock.c:202 hardirqs last disabled at (5634): [] sysvec_irq_work+0xe/0xc0 arch/x86/kernel/irq_work.c:17 softirqs last enabled at (5514): [] spin_unlock_bh include/linux/spinlock.h:396 [inline] softirqs last enabled at (5514): [] __tun_set_ebpf+0x124/0x1c0 drivers/net/tun.c:2302 softirqs last disabled at (5512): [] spin_lock_bh include/linux/spinlock.h:356 [inline] softirqs last disabled at (5512): [] __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-executor351/5086. stack backtrace: CPU: 1 PID: 5086 Comm: syz-executor351 Not tainted 6.9.0-rc5-syzkaller-00042-ge88c4cfcb7b8 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 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 3a f8 e7 f5 48 89 df e8 52 38 e9 f5 e8 1d 95 12 f6 fb bf 01 00 00 00 12 fe da f5 65 8b 05 83 2a 79 74 85 c0 74 06 5b c3 cc cc cc cc RSP: 0018:ffffc9000350fd10 EFLAGS: 00000282 RAX: f4dbaf4b64d7bd00 RBX: ffff88801f09d650 RCX: ffffffff9472c603 RDX: dffffc0000000000 RSI: ffffffff8bcab8a0 RDI: 0000000000000001 RBP: ffff888079e43a3c R08: ffffffff8fa8fdaf R09: 1ffffffff1f51fb5 R10: dffffc0000000000 R11: fffffbfff1f51fb6 R12: ffff88801f09d640 R13: ffff888079e43a00 R14: dffffc0000000000 R15: ffff88801f09d600 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 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop kernel/entry/common.c:114 [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+0x168/0x370 kernel/entry/common.c:218 do_syscall_64+0x102/0x240 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f809f78a619 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:00007f809f720238 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 RAX: 0000000000000000 RBX: 00007f809f815438 RCX: 00007f809f78a619 RDX: 0000000000000000 RSI: 00000000ffffffff RDI: 0000000000000003 ---------------- 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 3a f8 e7 f5 call 0xf5e7f851 17: 48 89 df mov %rbx,%rdi 1a: e8 52 38 e9 f5 call 0xf5e93871 1f: e8 1d 95 12 f6 call 0xf6129541 24: fb sti 25: bf 01 00 00 00 mov $0x1,%edi * 2a: e8 12 fe da f5 call 0xf5dafe41 <-- trapping instruction 2f: 65 8b 05 83 2a 79 74 mov %gs:0x74792a83(%rip),%eax # 0x74792ab9 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