================================ WARNING: inconsistent lock state 6.8.0-syzkaller-08951-gfe46a7dd189e #0 Not tainted -------------------------------- inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. syz-executor.3/5076 [HC0[0]:SC1[1]:HE0:SE0] takes: ffff888029312148 (&timer->lock){+.?.}-{2:2}, at: class_spinlock_irqsave_constructor include/linux/spinlock.h:574 [inline] ffff888029312148 (&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_seq_timer_close+0xa4/0x100 sound/core/seq/seq_timer.c:302 snd_seq_queue_timer_close+0x28/0x60 sound/core/seq/seq_queue.c:444 snd_seq_ioctl_set_queue_timer+0x17d/0x450 sound/core/seq/seq_clientmgr.c:1795 snd_seq_ioctl+0x222/0x3f0 sound/core/seq/seq_clientmgr.c:2327 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:904 [inline] __se_sys_ioctl fs/ioctl.c:890 [inline] __x64_sys_ioctl+0x193/0x220 fs/ioctl.c:890 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: 643759 hardirqs last enabled at (643758): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline] hardirqs last enabled at (643758): [] _raw_spin_unlock_irq+0x23/0x50 kernel/locking/spinlock.c:202 hardirqs last disabled at (643759): [] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline] hardirqs last disabled at (643759): [] _raw_spin_lock_irqsave+0x52/0x60 kernel/locking/spinlock.c:162 softirqs last enabled at (643494): [] softirq_handle_end kernel/softirq.c:400 [inline] softirqs last enabled at (643494): [] __do_softirq+0x596/0x8de kernel/softirq.c:583 softirqs last disabled at (643755): [] invoke_softirq kernel/softirq.c:428 [inline] softirqs last disabled at (643755): [] __irq_exit_rcu kernel/softirq.c:633 [inline] softirqs last disabled at (643755): [] 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 *** 4 locks held by syz-executor.3/5076: #0: ffff88802ed58420 (sb_writers#5){.+.+}-{0:0}, at: do_unlinkat+0x1d3/0x750 fs/namei.c:4385 #1: ffff8880607b8e00 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:828 [inline] #1: ffff8880607b8e00 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: do_unlinkat+0x288/0x750 fs/namei.c:4389 #2: ffffffff8e11e410 (tomoyo_ss){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:116 [inline] #2: ffffffff8e11e410 (tomoyo_ss){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:215 [inline] #2: ffffffff8e11e410 (tomoyo_ss){.+.+}-{0:0}, at: tomoyo_read_lock security/tomoyo/common.h:1108 [inline] #2: ffffffff8e11e410 (tomoyo_ss){.+.+}-{0:0}, at: tomoyo_path_perm+0x25f/0x450 security/tomoyo/file.c:821 #3: ffffc90000007cb0 ((&priv->tlist)){+.-.}-{0:0}, at: call_timer_fn+0x11a/0x5b0 kernel/time/timer.c:1789 stack backtrace: CPU: 0 PID: 5076 Comm: syz-executor.3 Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #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+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:native_irq_disable arch/x86/include/asm/irqflags.h:37 [inline] RIP: 0010:arch_local_irq_disable arch/x86/include/asm/irqflags.h:72 [inline] RIP: 0010:arch_local_irq_save arch/x86/include/asm/irqflags.h:104 [inline] RIP: 0010:kasan_quarantine_put+0x23/0x240 mm/kasan/quarantine.c:207 Code: 90 90 90 90 90 90 90 66 0f 1f 00 41 56 41 55 41 54 49 89 fc 55 53 e8 8c ea ff ff 48 85 c0 0f 84 c1 00 00 00 48 89 c5 9c 41 5d 41 81 e5 00 02 00 00 75 7c e8 1e 1c eb 08 48 c7 c3 40 91 03 00 RSP: 0018:ffffc9000355fa00 EFLAGS: 00000286 RAX: ffff88802a54e000 RBX: ffff88802a54e000 RCX: ffff88807cecf670 RDX: 0000000000000000 RSI: ffff88802a54e000 RDI: ffff888015042140 RBP: ffff88802a54e000 R08: 0000000000000007 R09: ffff88823bb8cf80 R10: 0000000000000000 R11: 0000000000000003 R12: ffff888015042140 R13: 0000000000000286 R14: 0000000000000000 R15: 0000000000000000 kasan_slab_free include/linux/kasan.h:184 [inline] slab_free_hook mm/slub.c:2106 [inline] slab_free mm/slub.c:4280 [inline] kfree+0x129/0x370 mm/slub.c:4390 tomoyo_realpath_from_path+0x1ad/0x720 security/tomoyo/realpath.c:286 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_path_perm+0x273/0x450 security/tomoyo/file.c:822 tomoyo_path_unlink+0x92/0xe0 security/tomoyo/tomoyo.c:162 security_path_unlink+0x100/0x170 security/security.c:1851 do_unlinkat+0x55b/0x750 fs/namei.c:4399 __do_sys_unlink fs/namei.c:4450 [inline] __se_sys_unlink fs/namei.c:4448 [inline] __x64_sys_unlink+0xc7/0x110 fs/namei.c:4448 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: 0033:0x7fd6df27d617 Code: 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 57 00 00 00 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:00007ffefedc31f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000057 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fd6df27d617 RDX: 00007ffefedc3220 RSI: 00007ffefedc32b0 RDI: 00007ffefedc32b0 RBP: 00007ffefedc32b0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000100 R11: 0000000000000206 R12: 00007ffefedc4370 R13: 00007fd6df2c93b9 R14: 000000000002095d R15: 0000000000000003 ---------------- Code disassembly (best guess): 0: 90 nop 1: 90 nop 2: 90 nop 3: 90 nop 4: 90 nop 5: 90 nop 6: 90 nop 7: 66 0f 1f 00 nopw (%rax) b: 41 56 push %r14 d: 41 55 push %r13 f: 41 54 push %r12 11: 49 89 fc mov %rdi,%r12 14: 55 push %rbp 15: 53 push %rbx 16: e8 8c ea ff ff call 0xffffeaa7 1b: 48 85 c0 test %rax,%rax 1e: 0f 84 c1 00 00 00 je 0xe5 24: 48 89 c5 mov %rax,%rbp 27: 9c pushf 28: 41 5d pop %r13 * 2a: fa cli <-- trapping instruction 2b: 41 81 e5 00 02 00 00 and $0x200,%r13d 32: 75 7c jne 0xb0 34: e8 1e 1c eb 08 call 0x8eb1c57 39: 48 c7 c3 40 91 03 00 mov $0x39140,%rbx