================================ WARNING: inconsistent lock state 5.15.151-syzkaller #0 Not tainted -------------------------------- inconsistent {HARDIRQ-ON-W} -> {IN-HARDIRQ-W} usage. syz-executor.2/15030 [HC1[1]:SC0[0]:HE0:SE1] takes: ffffffff8d14d958 (sync_timeline_list_lock){?.+.}-{2:2}, at: sync_timeline_debug_remove+0x28/0x140 drivers/dma-buf/sync_debug.c:31 {HARDIRQ-ON-W} state was registered at: trace_hardirqs_on+0x67/0x80 kernel/trace/trace_preemptirq.c:49 __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline] _raw_spin_unlock_irq+0x1f/0x40 kernel/locking/spinlock.c:202 spin_unlock_irq include/linux/spinlock.h:413 [inline] sync_print_obj drivers/dma-buf/sync_debug.c:118 [inline] sync_info_debugfs_show+0x154/0x4c0 drivers/dma-buf/sync_debug.c:153 seq_read_iter+0x43a/0xd10 fs/seq_file.c:230 seq_read+0x452/0x5c0 fs/seq_file.c:162 do_iter_read+0x4ca/0x760 fs/read_write.c:792 vfs_readv fs/read_write.c:910 [inline] do_preadv+0x211/0x350 fs/read_write.c:1002 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb irq event stamp: 502 hardirqs last enabled at (501): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline] hardirqs last enabled at (501): [] _raw_spin_unlock_irq+0x1f/0x40 kernel/locking/spinlock.c:202 hardirqs last disabled at (502): [] sysvec_irq_work+0xa/0xb0 arch/x86/kernel/irq_work.c:17 softirqs last enabled at (406): [] invoke_softirq kernel/softirq.c:432 [inline] softirqs last enabled at (406): [] __irq_exit_rcu+0x155/0x240 kernel/softirq.c:637 softirqs last disabled at (293): [] invoke_softirq kernel/softirq.c:432 [inline] softirqs last disabled at (293): [] __irq_exit_rcu+0x155/0x240 kernel/softirq.c:637 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.2/15030. stack backtrace: CPU: 1 PID: 15030 Comm: syz-executor.2 Not tainted 5.15.151-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106 valid_state+0x134/0x1c0 kernel/locking/lockdep.c:3932 mark_lock_irq+0xa8/0xba0 kernel/locking/lockdep.c:4135 mark_lock+0x21a/0x340 kernel/locking/lockdep.c:4591 mark_usage kernel/locking/lockdep.c:4483 [inline] __lock_acquire+0xb5c/0x1ff0 kernel/locking/lockdep.c:4966 lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0xd1/0x120 kernel/locking/spinlock.c:162 sync_timeline_debug_remove+0x28/0x140 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+0x200/0x250 drivers/dma-buf/sw_sync.c:144 kref_put include/linux/kref.h:65 [inline] dma_fence_put include/linux/dma-fence.h:279 [inline] dma_fence_array_release+0x127/0x230 drivers/dma-buf/dma-fence-array.c:120 irq_work_single kernel/irq_work.c:155 [inline] irq_work_run_list+0x20b/0x370 kernel/irq_work.c:177 irq_work_run+0x63/0xe0 kernel/irq_work.c:186 __sysvec_irq_work+0x9a/0x250 arch/x86/kernel/irq_work.c:22 sysvec_irq_work+0x89/0xb0 arch/x86/kernel/irq_work.c:17 asm_sysvec_irq_work+0x16/0x20 arch/x86/include/asm/idtentry.h:664 RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline] RIP: 0010:_raw_spin_unlock_irq+0x25/0x40 kernel/locking/spinlock.c:202 Code: 81 82 f6 ff 90 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 ee 86 3d f7 48 89 df e8 c6 da 3e f7 e8 e1 8c 61 f7 fb bf 01 00 00 00 f6 16 32 f7 65 8b 05 27 49 dd 75 85 c0 74 02 5b c3 e8 b4 60 db RSP: 0018:ffffc90004877d88 EFLAGS: 00000282 RAX: 2314e96600071b00 RBX: ffff888029ed1750 RCX: ffffffff913c6f03 RDX: dffffc0000000000 RSI: ffffffff8a8b1500 RDI: 0000000000000001 RBP: ffff88802325a43c R08: ffffffff8186b3a0 R09: ffffed10053da2eb R10: 0000000000000000 R11: dffffc0000000001 R12: ffff888029ed1740 R13: ffff88802325a400 R14: dffffc0000000000 R15: ffff888029ed1700 spin_unlock_irq include/linux/spinlock.h:413 [inline] sw_sync_debugfs_release+0x145/0x1c0 drivers/dma-buf/sw_sync.c:321 __fput+0x3bf/0x890 fs/file_table.c:280 task_work_run+0x129/0x1a0 kernel/task_work.c:164 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop+0x106/0x130 kernel/entry/common.c:175 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:208 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline] syscall_exit_to_user_mode+0x5d/0x250 kernel/entry/common.c:301 do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7fcad7011da9 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:00007fcad55920c8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 RAX: 0000000000000000 RBX: 00007fcad713ff80 RCX: 00007fcad7011da9 RDX: 0000000000000000 RSI: ffffffffffffffff RDI: 0000000000000003 RBP: 00007fcad705e47a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007fcad713ff80 R15: 00007ffcab853858 ---------------- Code disassembly (best guess): 0: 81 82 f6 ff 90 53 48 addl $0x48fb8948,0x5390fff6(%rdx) 7: 89 fb 48 a: 83 c7 18 add $0x18,%edi d: 48 8b 74 24 08 mov 0x8(%rsp),%rsi 12: e8 ee 86 3d f7 call 0xf73d8705 17: 48 89 df mov %rbx,%rdi 1a: e8 c6 da 3e f7 call 0xf73edae5 1f: e8 e1 8c 61 f7 call 0xf7618d05 24: fb sti 25: bf 01 00 00 00 mov $0x1,%edi * 2a: e8 f6 16 32 f7 call 0xf7321725 <-- trapping instruction 2f: 65 8b 05 27 49 dd 75 mov %gs:0x75dd4927(%rip),%eax # 0x75dd495d 36: 85 c0 test %eax,%eax 38: 74 02 je 0x3c 3a: 5b pop %rbx 3b: c3 ret 3c: e8 .byte 0xe8 3d: b4 60 mov $0x60,%ah 3f: db .byte 0xdb