================================ WARNING: inconsistent lock state 6.8.0-syzkaller-08951-gfe46a7dd189e #0 Not tainted -------------------------------- inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. syz-executor.3/5229 [HC0[0]:SC1[1]:HE0:SE0] takes: ffff8880209e6148 (&timer->lock){+.?.}-{2:2}, at: class_spinlock_irqsave_constructor include/linux/spinlock.h:574 [inline] ffff8880209e6148 (&timer->lock){+.?.}-{2:2}, at: snd_timer_interrupt.part.0+0x31/0xd80 sound/core/timer.c:818 {SOFTIRQ-ON-W} state was registered at: lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x540 kernel/locking/lockdep.c:5719 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:351 [inline] class_spinlock_constructor include/linux/spinlock.h:561 [inline] snd_timer_close_locked+0x65/0xbd0 sound/core/timer.c:412 snd_timer_close+0x8b/0xf0 sound/core/timer.c:464 snd_timer_user_release+0x91/0x260 sound/core/timer.c:1468 __fput+0x270/0xb80 fs/file_table.c:422 __fput_sync+0x47/0x50 fs/file_table.c:507 __do_sys_close fs/open.c:1556 [inline] __se_sys_close fs/open.c:1541 [inline] __x64_sys_close+0x86/0x100 fs/open.c:1541 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xd2/0x260 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x6d/0x75 irq event stamp: 32012411 hardirqs last enabled at (32012410): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline] hardirqs last enabled at (32012410): [] _raw_spin_unlock_irq+0x23/0x50 kernel/locking/spinlock.c:202 hardirqs last disabled at (32012411): [] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline] hardirqs last disabled at (32012411): [] _raw_spin_lock_irqsave+0x52/0x60 kernel/locking/spinlock.c:162 softirqs last enabled at (32012378): [] sockopt_release_sock+0x52/0x60 net/core/sock.c:1070 softirqs last disabled at (32012397): [] invoke_softirq kernel/softirq.c:428 [inline] softirqs last disabled at (32012397): [] __irq_exit_rcu kernel/softirq.c:633 [inline] softirqs last disabled at (32012397): [] irq_exit_rcu+0xb9/0x120 kernel/softirq.c:645 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(&timer->lock); lock(&timer->lock); *** DEADLOCK *** 2 locks held by syz-executor.3/5229: #0: ffff88802afc0d88 (&xt[i].mutex){+.+.}-{3:3}, at: xt_find_target+0xab/0x290 net/netfilter/x_tables.c:254 #1: ffffc90000848cb0 ((&priv->tlist)){+.-.}-{0:0}, at: call_timer_fn+0x11a/0x5b0 kernel/time/timer.c:1789 stack backtrace: CPU: 2 PID: 5229 Comm: syz-executor.3 Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #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+0x116/0x1f0 lib/dump_stack.c:114 print_usage_bug kernel/locking/lockdep.c:3971 [inline] valid_state kernel/locking/lockdep.c:4013 [inline] mark_lock_irq kernel/locking/lockdep.c:4216 [inline] mark_lock+0x923/0xc60 kernel/locking/lockdep.c:4678 mark_usage kernel/locking/lockdep.c:4567 [inline] __lock_acquire+0x13d4/0x3b30 kernel/locking/lockdep.c:5091 lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x540 kernel/locking/lockdep.c:5719 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162 class_spinlock_irqsave_constructor include/linux/spinlock.h:574 [inline] snd_timer_interrupt.part.0+0x31/0xd80 sound/core/timer.c:818 snd_timer_interrupt sound/core/timer.c:1107 [inline] snd_timer_s_function+0x14f/0x200 sound/core/timer.c:1107 call_timer_fn+0x1a0/0x5b0 kernel/time/timer.c:1792 expire_timers kernel/time/timer.c:1843 [inline] __run_timers+0x74b/0xab0 kernel/time/timer.c:2408 __run_timer_base kernel/time/timer.c:2419 [inline] __run_timer_base kernel/time/timer.c:2412 [inline] run_timer_base+0x111/0x190 kernel/time/timer.c:2428 run_timer_softirq+0x1a/0x40 kernel/time/timer.c:2438 __do_softirq+0x218/0x8de kernel/softirq.c:554 invoke_softirq kernel/softirq.c:428 [inline] __irq_exit_rcu kernel/softirq.c:633 [inline] irq_exit_rcu+0xb9/0x120 kernel/softirq.c:645 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0x95/0xb0 arch/x86/kernel/apic/apic.c:1043 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:__raw_callee_save___kvm_vcpu_is_preempted+0x13/0x20 Code: ff 66 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 04 fd 20 3b 23 8d 80 b8 90 85 02 00 00 <0f> 95 c0 c3 cc cc cc cc 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 RSP: 0018:ffffc900039bf5b0 EFLAGS: 00000246 RAX: ffff88806b300000 RBX: ffff88802afc0d20 RCX: 1ffffffff1ac31e8 RDX: ffffed10055f81a5 RSI: 0000000000000008 RDI: 0000000000000001 RBP: ffff8880186fa440 R08: 0000000000000000 R09: ffffed10055f81a4 R10: ffff88802afc0d27 R11: 0000000000000000 R12: 0000000000000000 R13: ffffed10053c5000 R14: ffff888029e28000 R15: dffffc0000000000 pv_vcpu_is_preempted arch/x86/include/asm/paravirt.h:606 [inline] vcpu_is_preempted arch/x86/include/asm/qspinlock.h:63 [inline] owner_on_cpu include/linux/sched.h:2167 [inline] mutex_spin_on_owner+0x141/0x2f0 kernel/locking/mutex.c:373 mutex_optimistic_spin kernel/locking/mutex.c:476 [inline] __mutex_lock_common kernel/locking/mutex.c:612 [inline] __mutex_lock+0x29e/0x9c0 kernel/locking/mutex.c:752 xt_find_target+0xab/0x290 net/netfilter/x_tables.c:254 xt_request_find_target+0x93/0x140 net/netfilter/x_tables.c:282 find_check_entry.constprop.0+0x658/0xa20 net/ipv6/netfilter/ip6_tables.c:563 translate_table+0xd06/0x17b0 net/ipv6/netfilter/ip6_tables.c:733 do_replace net/ipv6/netfilter/ip6_tables.c:1150 [inline] do_ip6t_set_ctl+0x5a8/0xbf0 net/ipv6/netfilter/ip6_tables.c:1636 nf_setsockopt+0x8a/0xf0 net/netfilter/nf_sockopt.c:101 ipv6_setsockopt+0x133/0x1a0 net/ipv6/ipv6_sockglue.c:999 tcp_setsockopt+0xa4/0x100 net/ipv4/tcp.c:3735 do_sock_setsockopt+0x222/0x480 net/socket.c:2311 __sys_setsockopt+0x1a4/0x270 net/socket.c:2334 __do_sys_setsockopt net/socket.c:2343 [inline] __se_sys_setsockopt net/socket.c:2340 [inline] __x64_sys_setsockopt+0xbd/0x160 net/socket.c:2340 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xd2/0x260 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x6d/0x75 RIP: 0033:0x7f1be427fafa Code: ff ff ff c3 0f 1f 40 00 48 c7 c2 b0 ff ff ff f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b7 0f 1f 00 49 89 ca b8 36 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 06 c3 0f 1f 44 00 00 48 c7 c2 b0 ff ff ff f7 RSP: 002b:00007ffe305e4688 EFLAGS: 00000202 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007ffe305e4710 RCX: 00007f1be427fafa RDX: 0000000000000040 RSI: 0000000000000029 RDI: 0000000000000003 RBP: 0000000000000003 R08: 0000000000000558 R09: 0079746972756365 R10: 00007f1be437b920 R11: 0000000000000202 R12: 00007f1be437b8c0 R13: 00007ffe305e46ac R14: 0000000000000000 R15: 00007f1be437cd00 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1) 6: 90 nop 7: 90 nop 8: 90 nop 9: 90 nop a: 90 nop b: 90 nop c: 90 nop d: 90 nop e: 90 nop f: 90 nop 10: 90 nop 11: 90 nop 12: 90 nop 13: 90 nop 14: 90 nop 15: 90 nop 16: f3 0f 1e fa endbr64 1a: 48 8b 04 fd 20 3b 23 mov -0x72dcc4e0(,%rdi,8),%rax 21: 8d 22: 80 b8 90 85 02 00 00 cmpb $0x0,0x28590(%rax) * 29: 0f 95 c0 setne %al <-- trapping instruction 2c: c3 ret 2d: cc int3 2e: cc int3 2f: cc int3 30: cc int3 31: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) 36: 90 nop 37: 90 nop 38: 90 nop 39: 90 nop 3a: 90 nop 3b: 90 nop 3c: 90 nop 3d: 90 nop 3e: 90 nop