================================ WARNING: inconsistent lock state 5.19.0-rc4-next-20220628-syzkaller #0 Not tainted -------------------------------- inconsistent {HARDIRQ-ON-W} -> {IN-HARDIRQ-W} usage. syz-executor253/3617 [HC1[1]:SC0[0]:HE0:SE1] takes: ffffffff8c963df8 (sync_timeline_list_lock){?.+.}-{2:2}, at: sync_timeline_debug_remove+0x25/0x190 drivers/dma-buf/sync_debug.c:31 {HARDIRQ-ON-W} state was registered at: __trace_hardirqs_on_caller kernel/locking/lockdep.c:4252 [inline] lockdep_hardirqs_on_prepare kernel/locking/lockdep.c:4319 [inline] lockdep_hardirqs_on_prepare+0x135/0x400 kernel/locking/lockdep.c:4271 trace_hardirqs_on+0x2d/0x120 kernel/trace/trace_preemptirq.c:49 __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline] _raw_spin_unlock_irq+0x1f/0x40 kernel/locking/spinlock.c:202 spin_unlock_irq include/linux/spinlock.h:410 [inline] sync_print_obj drivers/dma-buf/sync_debug.c:118 [inline] sync_info_debugfs_show+0xeb/0x200 drivers/dma-buf/sync_debug.c:153 seq_read_iter+0x4f5/0x1280 fs/seq_file.c:230 seq_read+0x2c7/0x420 fs/seq_file.c:162 vfs_read+0x1ef/0x5d0 fs/read_write.c:480 ksys_read+0x127/0x250 fs/read_write.c:620 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 irq event stamp: 4996 hardirqs last enabled at (4995): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline] hardirqs last enabled at (4995): [] _raw_spin_unlock_irq+0x1f/0x40 kernel/locking/spinlock.c:202 hardirqs last disabled at (4996): [] sysvec_irq_work+0xb/0xc0 arch/x86/kernel/irq_work.c:17 softirqs last enabled at (4862): [] spin_unlock_bh include/linux/spinlock.h:405 [inline] softirqs last enabled at (4862): [] __tun_set_ebpf+0xf6/0x1c0 drivers/net/tun.c:2267 softirqs last disabled at (4860): [] spin_lock_bh include/linux/spinlock.h:365 [inline] softirqs last disabled at (4860): [] __tun_set_ebpf+0xa3/0x1c0 drivers/net/tun.c:2263 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-executor253/3617. stack backtrace: CPU: 1 PID: 3617 Comm: syz-executor253 Not tainted 5.19.0-rc4-next-20220628-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 print_usage_bug kernel/locking/lockdep.c:3961 [inline] valid_state kernel/locking/lockdep.c:3973 [inline] mark_lock_irq kernel/locking/lockdep.c:4176 [inline] mark_lock.part.0.cold+0x18/0xd8 kernel/locking/lockdep.c:4632 mark_lock kernel/locking/lockdep.c:4596 [inline] mark_usage kernel/locking/lockdep.c:4524 [inline] __lock_acquire+0x14ad/0x5660 kernel/locking/lockdep.c:5007 lock_acquire kernel/locking/lockdep.c:5665 [inline] lock_acquire+0x1ab/0x570 kernel/locking/lockdep.c:5630 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x39/0x50 kernel/locking/spinlock.c:162 sync_timeline_debug_remove+0x25/0x190 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+0x263/0x340 drivers/dma-buf/sw_sync.c:144 dma_fence_release+0x2e9/0x590 drivers/dma-buf/dma-fence.c:549 kref_put include/linux/kref.h:65 [inline] dma_fence_put include/linux/dma-fence.h:276 [inline] dma_fence_array_release+0x1f6/0x2d0 drivers/dma-buf/dma-fence-array.c:120 dma_fence_release+0x2e9/0x590 drivers/dma-buf/dma-fence.c:549 kref_put include/linux/kref.h:65 [inline] dma_fence_put include/linux/dma-fence.h:276 [inline] irq_dma_fence_array_work+0xa5/0xd0 drivers/dma-buf/dma-fence-array.c:52 irq_work_single+0x120/0x250 kernel/irq_work.c:211 irq_work_run_list kernel/irq_work.c:242 [inline] irq_work_run_list+0x91/0xc0 kernel/irq_work.c:225 irq_work_run+0x54/0xd0 kernel/irq_work.c:251 __sysvec_irq_work+0x95/0x3d0 arch/x86/kernel/irq_work.c:22 sysvec_irq_work+0x8e/0xc0 arch/x86/kernel/irq_work.c:17 asm_sysvec_irq_work+0x1b/0x20 arch/x86/include/asm/idtentry.h:675 RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline] RIP: 0010:_raw_spin_unlock_irq+0x25/0x40 kernel/locking/spinlock.c:202 Code: 0f 1f 44 00 00 55 48 8b 74 24 08 48 89 fd 48 83 c7 18 e8 ee 3b e2 f7 48 89 ef e8 f6 bc e2 f7 e8 f1 b9 04 f8 fb bf 01 00 00 00 e6 da d5 f7 65 8b 05 1f 23 86 76 85 c0 74 02 5d c3 e8 5b f9 83 RSP: 0018:ffffc900030bfdf0 EFLAGS: 00000202 RAX: 0000000000001383 RBX: 00000000ffffffff RCX: 1ffffffff1b798f1 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001 RBP: ffff88801b07b950 R08: 0000000000000001 R09: 0000000000000001 R10: ffffed100360f72a R11: 0000000000000001 R12: ffff88801b07b900 R13: dffffc0000000000 R14: ffff88801b07b900 R15: ffff88801b07b950 spin_unlock_irq include/linux/spinlock.h:410 [inline] sw_sync_debugfs_release+0x160/0x240 drivers/dma-buf/sw_sync.c:321 __fput+0x277/0x9d0 fs/file_table.c:317 task_work_run+0xdd/0x1a0 kernel/task_work.c:177 ptrace_notify+0x114/0x140 kernel/signal.c:2353 ptrace_report_syscall include/linux/ptrace.h:420 [inline] ptrace_report_syscall_exit include/linux/ptrace.h:482 [inline] syscall_exit_work kernel/entry/common.c:249 [inline] syscall_exit_to_user_mode_prepare+0x129/0x280 kernel/entry/common.c:276 __syscall_exit_to_user_mode_work kernel/entry/common.c:281 [inline] syscall_exit_to_user_mode+0x9/0x50 kernel/entry/common.c:294 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x46/0xb0 RIP: 0033:0x7f3f7715a7e9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 a1 15 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f3f770e72f8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 ---------------- Code disassembly (best guess): 0: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) 5: 55 push %rbp 6: 48 8b 74 24 08 mov 0x8(%rsp),%rsi b: 48 89 fd mov %rdi,%rbp e: 48 83 c7 18 add $0x18,%rdi 12: e8 ee 3b e2 f7 callq 0xf7e23c05 17: 48 89 ef mov %rbp,%rdi 1a: e8 f6 bc e2 f7 callq 0xf7e2bd15 1f: e8 f1 b9 04 f8 callq 0xf804ba15 24: fb sti 25: bf 01 00 00 00 mov $0x1,%edi * 2a: e8 e6 da d5 f7 callq 0xf7d5db15 <-- trapping instruction 2f: 65 8b 05 1f 23 86 76 mov %gs:0x7686231f(%rip),%eax # 0x76862355 36: 85 c0 test %eax,%eax 38: 74 02 je 0x3c 3a: 5d pop %rbp 3b: c3 retq 3c: e8 .byte 0xe8 3d: 5b pop %rbx 3e: f9 stc 3f: 83 .byte 0x83