================================ WARNING: inconsistent lock state 6.6.0-syzkaller-15156-g13d88ac54ddd #0 Not tainted -------------------------------- inconsistent {HARDIRQ-ON-W} -> {IN-HARDIRQ-W} usage. syz-executor179/5176 [HC1[1]:SC0[0]:HE0:SE1] takes: ffffffff8ddfbf78 (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:4291 [inline] lockdep_hardirqs_on_prepare kernel/locking/lockdep.c:4358 [inline] lockdep_hardirqs_on_prepare+0x139/0x410 kernel/locking/lockdep.c:4310 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+0x4e5/0x1280 fs/seq_file.c:230 seq_read+0x196/0x240 fs/seq_file.c:162 vfs_read+0x1ce/0x8f0 fs/read_write.c:468 ksys_read+0x12f/0x250 fs/read_write.c:613 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3f/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x63/0x6b irq event stamp: 4788 hardirqs last enabled at (4787): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline] hardirqs last enabled at (4787): [] _raw_spin_unlock_irq+0x23/0x50 kernel/locking/spinlock.c:202 hardirqs last disabled at (4788): [] sysvec_irq_work+0xe/0xc0 arch/x86/kernel/irq_work.c:17 softirqs last enabled at (4708): [] spin_unlock_bh include/linux/spinlock.h:396 [inline] softirqs last enabled at (4708): [] __tun_set_ebpf+0xe5/0x1e0 drivers/net/tun.c:2300 softirqs last disabled at (4706): [] spin_lock_bh include/linux/spinlock.h:356 [inline] softirqs last disabled at (4706): [] __tun_set_ebpf+0xa1/0x1e0 drivers/net/tun.c:2296 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-executor179/5176. stack backtrace: CPU: 3 PID: 5176 Comm: syz-executor179 Not tainted 6.6.0-syzkaller-15156-g13d88ac54ddd #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+0xd9/0x1b0 lib/dump_stack.c:106 print_usage_bug kernel/locking/lockdep.c:3970 [inline] valid_state kernel/locking/lockdep.c:4012 [inline] mark_lock_irq kernel/locking/lockdep.c:4215 [inline] mark_lock+0x11f3/0x1950 kernel/locking/lockdep.c:4677 mark_usage kernel/locking/lockdep.c:4563 [inline] __lock_acquire+0x163e/0x5de0 kernel/locking/lockdep.c:5090 lock_acquire kernel/locking/lockdep.c:5753 [inline] lock_acquire+0x1ae/0x510 kernel/locking/lockdep.c:5718 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x3a/0x50 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:104 [inline] kref_put include/linux/kref.h:65 [inline] sync_timeline_put drivers/dma-buf/sw_sync.c:116 [inline] timeline_fence_release+0x262/0x340 drivers/dma-buf/sw_sync.c:144 dma_fence_release+0x2ef/0x500 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_put include/linux/dma-fence.h:293 [inline] dma_fence_array_release+0x1fa/0x2e0 drivers/dma-buf/dma-fence-array.c:120 dma_fence_release+0x2ef/0x500 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_put include/linux/dma-fence.h:293 [inline] irq_dma_fence_array_work+0xa9/0xd0 drivers/dma-buf/dma-fence-array.c:52 irq_work_single+0x1b5/0x260 kernel/irq_work.c:221 irq_work_run_list kernel/irq_work.c:252 [inline] irq_work_run_list+0x92/0xc0 kernel/irq_work.c:235 irq_work_run+0x58/0xd0 kernel/irq_work.c:261 __sysvec_irq_work+0x82/0x390 arch/x86/kernel/irq_work.c:22 sysvec_irq_work+0x8e/0xc0 arch/x86/kernel/irq_work.c:17 asm_sysvec_irq_work+0x1a/0x20 arch/x86/include/asm/idtentry.h:670 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 0a d9 e2 f6 48 89 df e8 02 58 e3 f6 e8 ad 3a 09 f7 fb bf 01 00 00 00 52 a4 d4 f6 65 8b 05 53 a5 7e 75 85 c0 74 02 5b c3 e8 40 6a 7b RSP: 0018:ffffc9000305fdb0 EFLAGS: 00000202 RAX: 00000000000012b3 RBX: ffff88801d63f150 RCX: 1ffffffff1e31ea9 RDX: 0000000000000000 RSI: ffffffff8acca9a0 RDI: 0000000000000001 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001 R10: ffffffff8f1927d7 R11: 0000000000000000 R12: ffff88801d63f100 R13: dffffc0000000000 R14: ffff88801d63f100 R15: ffff88801d63f150 spin_unlock_irq include/linux/spinlock.h:401 [inline] sw_sync_debugfs_release+0x164/0x240 drivers/dma-buf/sw_sync.c:321 __fput+0x270/0xbb0 fs/file_table.c:394 task_work_run+0x14d/0x240 kernel/task_work.c:180 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop kernel/entry/common.c:171 [inline] exit_to_user_mode_prepare+0x215/0x240 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline] syscall_exit_to_user_mode+0x1d/0x60 kernel/entry/common.c:296 do_syscall_64+0x4b/0x110 arch/x86/entry/common.c:88 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x7fc34d218e39 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 21 1f 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:00007fc34c9ad238 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 RAX: 0000000000000000 RBX: 00007fc34d29d458 RCX: 00007fc34d218e39 RDX: 0000000000000000 RSI: 00000000ffffffff RDI: 0000000000000003 RBP: 00007fc34d29d450 R08: 00007ffd1d674517 R09: 00007fc34c9ad6c0 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fc34d269004 R13: 000000000000006e R14: 00007ffd1d674430 R15: 00007ffd1d674518 ---------------- 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 0a d9 e2 f6 call 0xf6e2d921 17: 48 89 df mov %rbx,%rdi 1a: e8 02 58 e3 f6 call 0xf6e35821 1f: e8 ad 3a 09 f7 call 0xf7093ad1 24: fb sti 25: bf 01 00 00 00 mov $0x1,%edi * 2a: e8 52 a4 d4 f6 call 0xf6d4a481 <-- trapping instruction 2f: 65 8b 05 53 a5 7e 75 mov %gs:0x757ea553(%rip),%eax # 0x757ea589 36: 85 c0 test %eax,%eax 38: 74 02 je 0x3c 3a: 5b pop %rbx 3b: c3 ret 3c: e8 .byte 0xe8 3d: 40 6a 7b rex push $0x7b